-
Open Access Article
1 - Temperature effects role on the plasma antenna radiation pattern
Neda Khoddam Mehran Shahmansouri -
Open Access Article
2 - An analytic algorithm of Lane-Emden-type equations arising in astrophysics - a hybrid approach
Vipul K Baranwal Ram K Pandey Manoj P Tripathi Om P Singh -
Open Access Article
3 - Full structure of the thermal plasma including the ion isothermal drag
M. Khoram S. F. Masoudi -
Open Access Article
4 - Application of nanozeolite technology in the removal of sulfate from the Gamasyab River
Amin Rezaei Hossein Babazadeh Amir Khosrojerdi Mahdi Sarai TabriziHuman activities, the presence of salts in riverbeds and runoff, as well as pollutants carried by the air lead to the contamination of rivers as one of the main sources of water supply. In this study, the Gamasayab River was selected and sampling was conducted at 16 des MoreHuman activities, the presence of salts in riverbeds and runoff, as well as pollutants carried by the air lead to the contamination of rivers as one of the main sources of water supply. In this study, the Gamasayab River was selected and sampling was conducted at 16 designated points for three-time intervals in the most polluted location with the highest pollutant levels compared to other stations after spectrophotometric testing of the samples, in different seasons of the year. The collected samples were transported to the laboratory for measurement and determination of the target pollutant levels. Then, they were simulated using natural and modified zeolite nanoparticles for the purpose of purification. In the following, using the Design Expert model and assuming two factors, pH and absorbent-to-pollutant ratio, the optimal absorption points were determined, and the theoretical absorption values were also obtained. The research results showed that the absorption efficiency for the modified sample with 0.2 M nitric acid and sulfuric acid was estimated at 77%. From the investigation of the interaction between sulfate and three other pollutants including phosphate, nitrate, and iron, which was investigated by simulating the solution and in order to neutralize the effect of other dissolved substances, it was found that phosphate and nitrate ions led to a decrease in sulfate ion absorption by the absorbent, while iron ions increased the absorption of sulfate by the absorbent. The simulation results of the proposed model also indicated that the optimal absorption point for the absorbent was at a pH of 9.6 and a D/C value of 17.01, resulting in an absorption of the pollutant by 5.86%. Finally, the Freundlich isotherm was chosen for this absorbent with a coefficient of determination of 0.92 as the superior isotherm compared to the Langmuir isotherm with a coefficient of determination of 0.79. Manuscript profile -
Open Access Article
5 - Enhanced removal of humic acids (HAs) from aqueous solutions using MWCNTs modified by N-(3-nitro-benzylidene)-N-trimethoxysilylpropyl-ethane-1,2-diamine on Equilibrium, thermodynamic and kinetics
nima karachi -
Open Access Article
6 - Enhanced removal of Bismark Brown(BB) dye from aqueous solutions using activated carbon from raw Ziziphusspina-christi (ZSAC) Equilibrium, thermodynamic and kinetics
gholamhossein vatankhah hossein koohmareh -
Open Access Article
7 - A deductive kinetic study of diclofenac release from chitosan-based magnetic nanocomposite hydrogels
Zargazi M. H. Ghadimi Yari M. Mehran Kurdtabar -
Open Access Article
8 - Removal Phenol from Aqueous Solutions Using Environmental friendly and Effective Adsorbent onto Mn-doped Fe2O4 nanoparticles loaded on activated carbon
Moslem Rahmani piani Maryam abrishamkar Bijan Mombeni Goodajdar -
Open Access Article
9 - Adsorption of Benzyl Paraben Dye from Aqueous Solutions Using synthesized Mn-doped PbS (PbS:Mn) nanoparticles
elham mosavi alireza geramizadegan -
Open Access Article
10 - Adsorption of Cd2+ ions onto magnetic Bentonite/Fe3O4 nanoparticles loaded on Alginate beads in simulated wastewater to protect the environment
Mousa Yari Pirouz Derakhshi Kambiz Tahvildari Maryam Nozari -
Open Access Article
11 - Removal of Bismarck Brown and Disulfine Blue from Aqueous Solutions Using MWCNTs Functionalized by N-(3-nitrobenzylidene)-N'-trimethoxysilylpropyl-ethane-1,2-diamine
Alireza Geramizadegan -
Open Access Article
12 - Potentiometric Study on the Interaction of Hexadecyl Ttimethyl Ammonium Bromide (HTAB) with Urease Enzyme
Morteza Keshavarz -
Open Access Article
13 - Metal ions binding study on human growth hormone by isothermal titration calorimetric method
A.A. Saboury MS. Atri -
Open Access Article
14 - Sorption stuck). of C.I. Acid Red 88 from aqueous solutions onto sawdust
N. Modirshahla M. A. Behnajady A. Shamel R. Eskandari -
Open Access Article
15 - Structural effects on the interactions of Pb(II) ion with Modified Banana Shell and Banana Shell during adsorption from aqueous solution
0. Moradi M. Yari K. Zare -
Open Access Article
16 - Thermodynamic of Interaction between Some Water-Soluble Porphyrins and DNA by Titration Microcalorimetry
M. Keshavarz K. Zare M. Akbarzadeh M.R khoshchehreh A.F.B Mahdavi -
Open Access Article
17 - Role of activated carbon from natural adsorbent for removal of textile dyes: effect of pH, kinetic and adsorbent mass
Ameneh Khorsand Reza Fazaeli Mahboobeh Manoochehri -
Open Access Article
18 - Comparison of adsorptions of phenol,p-nitrophenol and 1-butanol on the activated carbon
Gholam-Hossein Naficy Seyed, Saeed Reza Emamian -
Open Access Article
19 - Application of the Freundlich Langmuir Temkin and Harkins-Jura adsorption isotherms for some amino acids and amino acids complexation with manganese kn(ll) on carbon nanolube
Mehdi Vadi Marjan Abbasi Marjan Zakeri Bita Jafari Yazdi -
Open Access Article
20 - Heavy Metals (Cr (VI), Cd (II) and Pb (II)) Ions Removal by Modified Jute: Characterization and Modeling
M. Yari M. A. Mohsen F. Khojasteh O. Moradi -
Open Access Article
21 - Thermodynamic study of lead ion removal by adsorption onto nanographene sheets
Y. Saghapour M. Aghaie K. Zare -
Open Access Article
22 - Removal of Cadmium Using a Novel Nano Composite, Silica Aerogel, Activated Carbon
M. H. Givianrad M. Saber-Tehrani P. Aberoomand-Azar M. Hosseini Sabzevari -
Open Access Article
23 - Adsorption of thallium (III) ion from aqueous solution using modified ZnO nanopowder
H. Dashti Khavidaki H. Aghaie M. R. Shishehbore -
Open Access Article
24 - Study of the adsorption of methyl orange from aqueous solution using nickel oxide nanoparticles: Equilibrium and Kinetics Studies
F. Falaki A. Fakhri -
Open Access Article
25 - Thermodynamic Study of Hg(II) Ion Adsorption onto Nano Hydroxyapatite from Aqueous Solution
S. Ghasemlou H. Aghaie M. Monajjemi -
Open Access Article
26 - Adsorption of Ni(II) and Cd(II) Ions from Aqueous Solutions by Modified Surface of Typha latifolia L. Root, as an Economical Adsorbent
Gholamreza Ebrahimzadeh Rajaei Hossein Aghaie Karim Zare Mehran Aghaie -
Open Access Article
27 - The study of Lysozyme adsorption onto 2-hydroxyethylmethacrylates and Silicon Hydrogel Contact Lenses
Omid Moradi -
Open Access Article
28 - Determination of kinetic and thermodynamic parameters of heavy metal removal from aqueous solution by nano zero valent iron (NZVI) and nano copper oxide (nCuO)
رقیه حمزه نژاد ابراهیم سپهر عباس صمدی میرحسن رسولی صدقیانی حبیب خداوردیلوIn order to study the equilibrium, kinetic and thermodynamic of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) adsorption by nano zero valent iron (nZVI) and nano copper oxide (nCuO), batch experiments carried out with different initial concentration of the metals a MoreIn order to study the equilibrium, kinetic and thermodynamic of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) adsorption by nano zero valent iron (nZVI) and nano copper oxide (nCuO), batch experiments carried out with different initial concentration of the metals at different time and temperature. The results showed that the removal efficiency and adsorption capacity of nano particlesincreased with increasing initial concentration. Among adsorption kinetic models, pseudo second order model was better fitted for experimental data (R2=0.99-1.00). The adsorption data were well fitted with Langmuir model compared to Freundlich, Temkin and Dubinin-Radushkevich models. Maximum mono layer adsorption (qmax) of Cd, Pb, Cu and Zn were obtained 218, 239, 242 and 215 mg g-1 for nano zero valent iron and 90, 176, 100 and 76 for nano copper oxide respectively. The sorption energy parameter (E) of Dubinin-Radushkevich isotherm and Gibbs free energy change (ΔG) indicated that the metals adsorption processes were physical and spontaneous. The separation factor of Langmuir (RL) indicated that the sorption reactions of metals by the nano particles is favorable (RL=0.03-0.50). Manuscript profile -
Open Access Article
29 - Study on isotherm and kinetic for the adsorption of heavy metal Zinc from aqueous solution by Scenedesmus micro-algae
Mona Zelli Booriabadi Seyed Abbas Hoseini Seyed Aliakbar Hedayati Afshin Adeli Hassan RezaeiBackground: Zinc is an abundant element in the Earth's crust at approximately 0.04 grams to kilograms. The Zinc sulfide is found mostly in nature. The deposition of Zinc absorption by the amount of soluble in aqueous solutions decreases. In this study, the removal of Zi MoreBackground: Zinc is an abundant element in the Earth's crust at approximately 0.04 grams to kilograms. The Zinc sulfide is found mostly in nature. The deposition of Zinc absorption by the amount of soluble in aqueous solutions decreases. In this study, the removal of Zinc was investigated by Scenedesmus algae. Methods: To determine the amount of Zinc absorbed by the absorbent Scenedesmus concentrations of pollutants under different conditions, adsorbent dose, contact time, pH back and the remaining amount was measured by atomic absorption. Adsorption isotherms and kinetic modeling of metal ions on the adsorbent based on the model of Langmuir, Freundlich and kinetics were determined pseudo-first and pseudo-second. Results: absorption and adsorption kinetics by Langmuir and Freundlich isotherm models by the model described by pseudo first order and pseudo-second. The results showed that the correlation coefficient, absorption kinetics of pseudo-second-order model with an amount equal to 1 and the balance by the amount of 0.7926 were described by Freundlich isotherm. Conclusion: This study showed absorption process due to the high correlation algae Scenedesmus sp feature is the removal of Zinc And can be to used proposed as appropriate for the removal of the wastewater. Manuscript profile -
Open Access Article
30 - Methylene blue Adsorption from Aqueous Solution using magnetite-oak adsorbent
Farhad Salimi Sarie PireBackground and objective: Each year about billion tons of dyes from textile and dyeing industry are discharged in the wastewater, which they are the most dangerous chemicals. Then removing this dyes from wastewater requires proper treatment before being released into th MoreBackground and objective: Each year about billion tons of dyes from textile and dyeing industry are discharged in the wastewater, which they are the most dangerous chemicals. Then removing this dyes from wastewater requires proper treatment before being released into the environment. The aim of this study is to evaluate and determine the possibility of using absorbent obtained from the Fe3O4-Oak as a low-cost adsorbent for the removal of methylene blue from aqueous solution. Material and Methodology: FTIR analysis was used to investigate the presence of magnetite iron in the oak structure. In these tests, a batch system was used for the absorption process. The effect of pH, adsorbent dosage, and initial concentration of dye and time as key parameters were evaluated. Also, the isotherm models were used to study the experimental adsorption data. Findings: The results that increasing pH increases the removal rate and the highest adsorption was obtained at pH 7. The Langmuir, Freundlich, temkin and Dubinin–Radushkevich isotherm models were used to evaluate experimental data and obtained results indicated that the Langmuir isotherm and Dubinin–Radushkevich models is better than other models with data obtained. Finally, the results of this study indicate that used absorbent have high efficiency for removal of methylene blue. The pseudo-second-order kinetic model well depicted the kinetics of dyes adsorption on adsorbent. Discussion and Conclusion: This study has been showed that the present adsorbent has a good case for removing dye from wastewater and also, having the magnetic property of the adsorbent will cause more rapid regeneration. Manuscript profile -
Open Access Article
31 - The removal of NO2 gas by some natural adsorbents by using the adsorption method
Hossein Dashti Khavidaki Raziyeh Jafari Mousa SoleymaniBackground and Objective: Nitrogen dioxide (NO2) is one of the most dangerous pollutants in the environment. NO2 certainly causes lung damage at high concentrations. Exposure to its moderate levels (50 ppm) for a short period may produce irritation of the eyes, nose, an MoreBackground and Objective: Nitrogen dioxide (NO2) is one of the most dangerous pollutants in the environment. NO2 certainly causes lung damage at high concentrations. Exposure to its moderate levels (50 ppm) for a short period may produce irritation of the eyes, nose, and throat, cough, hemoptysis, dyspnea, and chest pain and contact to its high concentrations (> 100 ppm) can result in pulmonary edema, which can be fatal. Therefore, it is very important for environment the removing of the pollutant from air. The aim of this study has been the removal of NO2 gas by some natural adsorbents by using the adsorption method. Material and Methodology: In this work, it has been investigated the removal of NO2 gas by adsorption on different natural adsorbents including eggshell, eucalyptus bark, fennel seed, pine leaf, tea waste, and wheat straw. It was also studied the effect of some experimental conditions including adsorbent column length and initial NO2 amount on the adsorption percentage. Findings: The most desirable adsorption percentage obtained with adsorbent column length 50 cm and initial NO2 amount 6.3 mmol. In addition, Fennel seed and eggshell can adsorb 96.8 and 92.1% of NO2 gas in the optimum conditions, respectively. Discussion and Conclusion: Among the used adsorbents, the most appropriate adsorbents are fennel seed and eggshell for the adsorption process. In addition, it was correlated the equilibrium data with the adsorption isotherms such as the Langmuir, Freundlich, Temkin, and Harkin-Jura and the results showed that Harkin-Jura isotherm describes the experimental results better than the other isotherms. Manuscript profile -
Open Access Article
32 - Investigation of Effective Parameters on Starch Adsorption from Aqueous Solutions by Iron-Chitosan Nanoparticles
Khashayar Mohamadbeigy Amir hessam Hassani Seyedeh Hoda Rahmati amirhossein javidBackground and Objective: Starch is widely used in food, pharmaceutical, paper & textile industry in large quantities. The wastewater of these units have high biological oxygen demand (BOD). In this study, the adsorption capacity of starch from aqueous solution was MoreBackground and Objective: Starch is widely used in food, pharmaceutical, paper & textile industry in large quantities. The wastewater of these units have high biological oxygen demand (BOD). In this study, the adsorption capacity of starch from aqueous solution was investigated using metal nanoparticles coated with chitosan. Due to the fact that chitosan biopolymer is non-toxic, biocompatible and biodegradable and also high adsorption capacity, degradability, stability, easily production and low cost, so the possibility of this nanoparticle can be considered in starch wastewater treatment. Material and Methodology: First, magnetic nanoparticles was and the structure characteristics and morphology of this nano particle were investigated. Then, the performance of nano-adsorbent and the effect of effective parameters on starch uptake, such as contact time, adsorbent, initial adsorbent concentration, temperature and pH of the solution, were studied. Finding: The results showed that it is possible the adsorption of starch with metal nanoparticles coated with chitosan. The maximum adsorption 84 present of starch is obtained at pH 5, contact time: 60 minutes and the dosage 2 mg of adsorbent per liter. According on experimental data are more compatible with the Langmuir isotherm than the Freundlich isotherm. The results also showed that these data follow a pseudo-second order kinetic model. Discussion and Conclusion: According to the results, although it is possible to reduce the amount of starch by using magnetic chitosan nanosorbent, but it is necessary to pilot and techno- economical study to investigate hybrid use with other conventional methods in treatment system of starch processing units. Manuscript profile -
Open Access Article
33 - Adsorption of Nickel Ions from Aqueous Solutions using Immobilized Silica Nanoparticles onto Zeolite 13x
Tahere Mardani Elham AmeriBackground and Objective: Nano material has attracted much attention due to its functional groups and special properties. In this study, silica nanoparticles immobilized on zeolite 13X granules (SZX13), by sol gel method was synthesized. The aim of this study was determ MoreBackground and Objective: Nano material has attracted much attention due to its functional groups and special properties. In this study, silica nanoparticles immobilized on zeolite 13X granules (SZX13), by sol gel method was synthesized. The aim of this study was determination of the performance of prepared nano sorbent in nickel ions removal from aqueous solution. Material and Methodology:The present historical research, with an analytical-comparative approach, has used inferential and deductive reasoning. First, the principles of organic style architecture, derived from a comparative study of written evidence and existing documents, were explained as a criterion of measurement. Then, a list of works of organic architecture in Iran was prepared to select samples for analysis by purposive sampling. Finally, the analyzed samples were compared with the principles of organic architecture. Findings: Scanning Electron Microscope analysis showed that the immobilization process was successfully carried out and the immobilized particles has a nano size distribution. Optimized values for each factor to achieve the highest uptake were found to be as follows: The Ni initial concentration of 60 mg/L, the pH 6, the adsorbent (SZX13) dose of 1 g, at 40 ° C. Discussion and Conclusion: Results showed that the immobilization of nano particles on the zeolite not only led to that the particles were distributed in an expanded volume, but also prepare the accessible usage of that in an industrial scale. In addition, with immobilization of silica nanoparticles onto zeolite granules, the sorption of nickel ions were increased in comparison to that by using zeolite 13X, and the removal percentage was increased from %26 to %43.98. Manuscript profile -
Open Access Article
34 - Kinetics and Thermodynamics studies of Ni (II) adsorption by silica aerogel-activated carbon nanocomposite
Zohreh Saadati Mahmood ShoogardzadehAbstract Background and Objective: Presence of toxic heavy metals like nickel in water resources is a major environmental problem in many communities. Method: In this study, to stimulate the removal of Ni (II) from aqueous solution by silica aerogel-activated car MoreAbstract Background and Objective: Presence of toxic heavy metals like nickel in water resources is a major environmental problem in many communities. Method: In this study, to stimulate the removal of Ni (II) from aqueous solution by silica aerogel-activated carbon nanocomposite, the parameters affecting the adsorption process such as pH, amount of adsorbent, contact time, temperature and concentration were investigated and optimized. Findings: The results showed the maximum adsorption at pH= 5. The lower pH, the more H+ ion competing with the metal ion for adsorption sites. Kinetic studies indicated that the adsorption process followed the pseudo-second order kinetics. Moreover, the equilibrium data related to adsorption isotherms showed a superiority of the Langmuir isotherm compared to other models. Discussion and Conclusion: Calculation of thermodynamic factors, such as ΔG◦, ΔH◦ and ΔS◦, indicated that the adsorption process is spontaneous, endothermic and irreversible. The results showed that silica aerogel-activated carbon nanocomposite has been successfully employed for the removal of Ni (II) from aqueous solutions. Manuscript profile -
Open Access Article
35 - Study of Hydrogen Adsorption on FeTi and Single-Walled Carbon Nan tube (SWCN) Using Molecular Dynamic Simulation
Reza Alizadeh Parvin NasiriFinding a new method for storage of huge amount of hydrogen gas with the proper safety manners forusing in vehicles and other equipments has attracted the environmental and energy researching centersattention. In this research by using molecular dynamics simulation the MoreFinding a new method for storage of huge amount of hydrogen gas with the proper safety manners forusing in vehicles and other equipments has attracted the environmental and energy researching centersattention. In this research by using molecular dynamics simulation the adsorption isotherms ofmolecular hydrogen on FeTi nano particles system and Single-Walled Carbon Nanotube (SWCN) atseveral temperatures ranging from 60 to 100 K by calculation of Adsorption coverage. Iso-steric heat,and binding energy were studied at different temperatures and pressures. The amount of Hydrogenadsorbed at the pressure: 10 MPa and temperature: 60 K for the first layer on the FeTi nano particleswas gained between0.28 to 0.35 and inside the SWNT in highest chosen diagonal was 0.008.Consequently the FeTi nano particles can be used as a new and suitable material in order to storage thehydrogen gas in fuel cells. Manuscript profile -
Open Access Article
36 - Study of Variations Equilibrium Time at Different Concentrations by Activated Carbon Adsorbent
Hassan Jamali Armandi Shayan ShamohammadiObjective: The purpose of this research is the effect of initial concentration of lead absorbed on theequilibrium time by active carbon.Materials and methods: The study of granular activated carbon (GAC) of the raw material is wood w.For experimental, Absorption kinetic MoreObjective: The purpose of this research is the effect of initial concentration of lead absorbed on theequilibrium time by active carbon.Materials and methods: The study of granular activated carbon (GAC) of the raw material is wood w.For experimental, Absorption kinetics of initial concentration 1 to 500 mg L-1 was used and measuringthe remaining concentration absorbed by atomic absorption (Model 220 AA company varianAustralia) was performed.Results: Process adsorption equilibrium reached at 45, 60, 75, 90, 75, 70 and 60 min for initial leadconcentration of 1, 10, 20, 50, 100, 200 and 500 mg L-1. Study equilibrium time at variedconcentrations showed that decreased equilibrium time with decreasing initial lead concentration from50 to 1 mg L-1. Efficiency adsorption increased while the initial lead concentration decreased from 500to 1 mg L-1. The maximum percent adsorption of lead was found to be %99.7 at initial leadconcentration of 1 mg L-1. The experimental data were fitted using two adsorption kinetic models, theHo et al. (1996) and Lagergren (1893) models. Results showed that lead ions adsorption followedadsorption model of Ho et al. (1996). Also, fitting Langmuir and Freunlich adsorption isothermmodels on experimental data showed that Freundlich model described experimental data in a betterway. Manuscript profile -
Open Access Article
37 - Comparing the Bio-Sorption Affinity of Ni and Cd by Bio-Solid with Other Bio-Sorbent
Reza Fouladi Fard Aliakbar AzimiHeavy metals pollution is very important in Environment. Toxicity and accumulation characteristics ofthese metals are more noticeable for health aspects. Today, using bio-sorbent is more noticeablebecause these ways are ecofriendly and economic. In this survey, in addit MoreHeavy metals pollution is very important in Environment. Toxicity and accumulation characteristics ofthese metals are more noticeable for health aspects. Today, using bio-sorbent is more noticeablebecause these ways are ecofriendly and economic. In this survey, in addition to achieving Ni and Cdbio-sorption by bio-solid , the results of other relative surveys used for comparing the results andbio-sorption affinity discussion.Bio-solid powder produced from municipal excess sludge by drying, grinding and grainsizing. Ni andCd solutions in 0.25 and 0.75 mille molar have been contacted which 0.5, 1, 2 and 4 grams of biosolidin pH 4, 200 rpm stirring, 24-260C temperature and two hours (continuous 5-420 min in kineticstudy) time and samples have been analyzed with atomic absorption spectrophotometer to kinetic andisotherm modeling study and comparing the results.The maximum equilibrium adsorption of metals observed at two hours contact time and increasing ofpH up to 4 increased the adsorption rate. The equilibrium data of both metals could be fitted byLangmuir isotherm equation and the maximum adsorption capacity (qmax) for cadmium and nickel are0.38 and 0.195 mmol/gr dry bio-solid, respectively.The same as other biomasses studied for bio-sorption of heavy metals bio-sorption affinity of bio-solidfor Cd is more than Ni. Generally, the bio-sorption affinity of algae and fungi for heavy metalsbio-sorption is more than sludge and bacteria that is the result of cellular wall characteristics Manuscript profile -
Open Access Article
38 - Evaluation of Efficiency of Rice Bran in the Removal of Heavy Metals from Wastewater
soheil sobhan ardakani hassan Parvizi mosaed Razieh zandi pakRice bran, as an organic solid waste material, has a high adsorption potential in removal of heavy metal ionsfrom wastewater and can be very effective in treating the industrial wastewater which is the main source of waterand soil contamination with heavy metals. In thi MoreRice bran, as an organic solid waste material, has a high adsorption potential in removal of heavy metal ionsfrom wastewater and can be very effective in treating the industrial wastewater which is the main source of waterand soil contamination with heavy metals. In this study, the efficiency of Cr(III) and Cu(II) removals from heavymetals containing solutions was evaluated. Afterwards by adding rice bran to reaction environment, the amountof metal ions removed by rice bran in acidities, amount of adsorbent used, contact times and different initialconcentrations of ions in wastewater were investigated. The results indicated that with an increase in the solutionpH, the percentage heavy metal ions adsorption by rice bran increased and reach the amount maximum in pH=5.Also, percentage of adsorption was dependent on metal type, so that percentages of Cr(III) and Cu(II) adsorptionfrom wastewater were 84.2% and 89.5% in pH=5, respectively.To increase the wastewater initial concentration,first percentage of adsorption was increased and then it was decreased due to saturation of rice bran particles.According to the obtained results, the calculated saturation capacities of rice bran for Cr(III) and Cu (II) were 71and 78 mg/g-1 respectively. Moreover, percentage of ions adsorption was increased with the increase of contacttime. Due to rapid reaction, 50-60% of metal ions was adsorbed after 5 min from start of reaction. In this study,contact time of 30 min was offered as an appropriate contact time. The experimental data were analyzed usingthe Langmuir and Freundlich models of adsorption. Equilibrium data fitted well with the Langmuir model. Manuscript profile -
Open Access Article
39 - Investigating the effect of Nitric acid (with different normalities) on the efficiency of scoria in Malachite removal from aquatic environments: determination of model, isotherms and reaction kinetics
Kiomars Sharafi Abdollah Dargahi Nahid Azizi Jila Amini Mehdi Ghayebzadeh Zahra Rezai masoud moradiAbstract Background and Objective: Malachite, due to its features and low degradability, can be removed from aquatic environments with difficulty. Given the Nitric acid effect on the physical and chemical characteristics of scoria, this study was to evaluate the effect MoreAbstract Background and Objective: Malachite, due to its features and low degradability, can be removed from aquatic environments with difficulty. Given the Nitric acid effect on the physical and chemical characteristics of scoria, this study was to evaluate the effect of sulfuric acid normality (1, 6 and 12) on the efficiency of scoria in Malachite removal from aquatic environments and to determine model, isotherms and reaction kinetics. Method: Adsorption processes were carried out in vitro at different pH values, adsorbent dosages, contact times and constant concentrations of the dye. Residual concentrations of dye was measured as 665 nm by a spectrophotometer (Cary 50 Perkin Elmer Co). In order to understand the adsorption process, the obtained data were fitted by the Langmuir, Freundlich isotherms, and pseudo-first and second-order kinetics. Findings: The results showed that the dye removal eas increased with the increase of acid normality, pH, adsorbent dosage and contact time. The highest efficiency (100%) was obtained for the adsorbent modified with sulfuric acid 6 and 12 normalities in pH =11, adsorbent dose of 1.4 g/L and contact time of 75 minutes. Adsorption data proper followed both the Langmuir isotherm, Freundlich adsorption and pseudo-second-order kinetic. Discussion and Conclusion: According to the results, it can be concluded that Malachite adsorption by scoria occurs in both multi-and mono-layerd forms and scoria treatment with Nitric acid, due to wide chemical changes (especially silica/alumina ratio) of adsorbent structure, increases the efficiency as compared to natural scoria. Manuscript profile -
Open Access Article
40 - Removal of Lead and Cadmium by Coral Limestone Granules of Aquatic Solutions
Reza Shokohi Hamid reza Ehsani Monire Tarlani azarIntroduction: Due to the increasing use of the adsorption process to remove pollutants in theenvironment, choosing a suitable material from technical and economical aspects as catchy has been amajor concern of researchers in this field. The aim of this study was to eval MoreIntroduction: Due to the increasing use of the adsorption process to remove pollutants in theenvironment, choosing a suitable material from technical and economical aspects as catchy has been amajor concern of researchers in this field. The aim of this study was to evaluate the efficiency of corallimestone granules to remove metals cadmium and lead in the aquatic solutions.Materials and Methods: This study was conducted in a laboratory scale. During the first stages somecoral limestone with numerous granules were prepared from the 30 mesh metal removal efficiencyunder different conditions and changing the effective factors, including pH; contact time and amountof adsorbent was determined. Aabsorption isotherms of metal ions on the adsorbent according to thedesired test Langmuir and Freundlich isotherm models were evaluated.Result and Discussion: This study showed that maximum adsorption capacity of cadmium and leadon calcareous coral granules in optimum condition is 370/3 and 14/77 mg /L respectively. Theremoval efficiency of metals contact time, amount of adsorbent and pH was directly related to themost appropriate pH for the removal of metals is studied pH = 10 in the best model isotherms adsorbthe cadmium model of Langmuir (R2 = 0/9891 ) and for the lead model Freundlich (R2 = 0/9909)were determined. Due to good removal efficiency, low cost production process and lack ofenvironmentally harmful substances, this material can be used to remove cadmium and lead from theIndustrial Wastewater Treatment. Analyze data and determine correlations between variables usingregression analysis Non-parametric Spearman showed no significant correlation between efficiencyand the variables there. Manuscript profile -
Open Access Article
41 - Removal of Nickel (II) from Wastewater and Aqueous Solution Using Activated Carbon from Brown Alga Sargassum SP.
akbar esmaeili samira ghasemi pari beirami abdolhossein rostaeiyan farnaz rafieiIn this work, the batch removal of Ni ions from aqueous solution and wastewater using marine brown alga Sargassum was investigated. Activated carbon, prepared from Sargassum by acid decomposition, was also used for the removal of Ni from aqueous solution and waste MoreIn this work, the batch removal of Ni ions from aqueous solution and wastewater using marine brown alga Sargassum was investigated. Activated carbon, prepared from Sargassum by acid decomposition, was also used for the removal of Ni from aqueous solution and wastewater. The effects of pH, biosorption time, adsorbent dose, metal ions concentration were considered. The most effective pH was found to be 5.0. The maximum uptake rates for nickel with initial concentrations of 30, 50 and 70 mg/L were obtained to be 97.8% , 84.53% and 60.34% respectively at pH=5. The equilibrium adsorption data were fitted to isotherm models. The adsorption followed second order kinetic. This study shows the application of activated carbon as valuable material for the removal of Ni from aqueous solution and wastewater Manuscript profile -
Open Access Article
42 - Adsorption of Zn (II) from Aqueous Solution Using Chitin Extracted from Carapace Crab Shells
Nematollah Jaafarzadeh Nezamaddin Mengelizadeh Afshin Takdastan Mohammad amin DinariBackground: Zinc is one of the most important metals often found in effluents discharged from industries. It is important for the phyonsiological functions of living tissues and regulates many biochemical processes. However, excessive zinc can cause eminent health probl MoreBackground: Zinc is one of the most important metals often found in effluents discharged from industries. It is important for the phyonsiological functions of living tissues and regulates many biochemical processes. However, excessive zinc can cause eminent health problems. The aim of this study was to investigate zinc removal from aqueous solutions using chitin extracted from carapace crab shells. Methods: To study the removal of zinc, chitin extracted from carapace crab shells was used as biosorbent in a batch system. Also the influence of pH, initial metal concentration, amount of adsorbent and contact time on adsorption process was investigated. Results: The results of this research showed that the absorption capacity of zinc closely depends on the pH of solution, because zinc absorption concentration (mg/g) increased with the increase of pH. The maximum biosorption capacity of Zn2+ onto chitin (181.181 mg/g) was obtained at biomass dosage of 4g/L and contact time of 180 min. The result showed that removal efficiency of zinc was decreased by increase of initial zinc concentration. The results of equilibrium studies revealed that zinc absorption process on the extracted chitin was desirable and followed the Freundlich isotherm model and pseudo second kinetic model. Moreover, fourier transform infrared spectroscopy (FTIR) results demonstrated that functional groups such as amine (-NH2 (and hydroxyl (-OH) had the largest effect on zinc adsorption. Conclusion: According to the obtained results, the chitin extracted from crab shells appears to be a suitable adsorbent for the removal of zinc from aqueous solutions Manuscript profile -
Open Access Article
43 - Numerical Study of Coupled Fluid Flow and Heat Transfer in a Rectangular Domain at Moderate Reynolds Numbers using the Control Volume Method
V. Ambethkar M. Srivastava A. Chamkha -
Open Access Article
44 - Non-Newtonian thermal convection of eyring-powell fluid from an isothermal sphere with biot number effects
S. Abdul ‎Gaffar‎ V. Ramachandra Prasad E. Keshava Reddy -
Open Access Article
45 - Feasibility of Copper Removal from Wastewaters by Using Compost as a Natural Sorbent
Davood Kahforoushan Elnaz Safaree Shirin Nouraeenia -
Open Access Article
46 - The Color Removal of Dye-Containing Wastewater by Cerium (IV) Sulfate from Aqueous Solutions
Elham Keshmirizadeh Roghayeh Dideh khani -
Open Access Article
47 - Removal of Bisphenol-A from Aqueous Solution Using Rice Husk Nanosilica: Adsorption Kinetics, Equilibrium and Thermodynamic Studies
Benjamin Olawale Orimolade Folahan Amoo Adekola Aderonke Aminat Mohammed Azeez Olayiwola Idris Oluwaseyi Damilare Saliu Taofeek Yusuf -
Open Access Article
48 - Adsorption of Basic Blue 41 from Aqueous Solution onto Coconut Fiber Particles
Mona Yazdanshenas Khosro Farizadeh Ardeshir Fazilat Saeid Ahmadi -
Open Access Article
49 - Removal of Alizarin Red Dye Using Calcium Hydroxide as a Low-cost Adsorbent
Thimmasandra Narayan Ramesh Ashwathaiah Ashwini Devarahosahally Veeranna Kirana -
Open Access Article
50 - Ultrasonic Assisted Adsorption of Rhodamine B (RhB) Dye by Albizia Stem Bark Lebbeck Modified by Fe2 (MoO4)3 Nanocomposite Synthesis: Experimental Design Methodology
Shiva Enolghozati Nasrin Choobkar Elham Pournamdari Farzaneh Marahel -
Open Access Article
51 - Green Fabrication of Albizia Lebbeck Leaves-Capped Silver Nanoparticles for Removal of Butylparaben
Fatemeh Maghami Maryam Abrishamkar Bijan Mombini Godajdar Mina Hossieni -
Open Access Article
52 - Interaction of Human Serum Albumin with Ethyl 2-[2-(dimethylamino)-4-(4-nitrophenyl)-1,3-thiazole-5-yl]-2-oxoacetate as a Synthesized Ligand
Mahboube Eslami Moghadam Maryam Saidifar Faramarz Rostami-Charati Zinatossadat Hossaini Maryam Ghadamgahi -
Open Access Article
53 - The Study of Corrosion Inhibition of Al-pure in HCl by Some New Organic Schiff Bases Using Chemical and Electrochemical Methods
Aesha S. Patel Vidhi A. Panchal Purdi T. Trivedi Nisha K. Shah -
Open Access Article
54 - Rice Bran as a Sorbent for Malonic Acid From Aqueous Solution
Narges Samadani Langeroodi Vida Jodaian Sepideh Mehrani -
Open Access Article
55 - Montmorillonite as Efficient Nanoclay for Removal of Aniline Blue Dye: Optimization, Isotherm and Kinetic Study
Somayeh Lorzani Shahla Elhami -
Open Access Article
56 - A Survey on Adsorption of Heavy Metals Including Pb(II) and Co(II)on the Montmorillonite/Copper Oxide Nanocomposites and Montmorillonite Clays
Maryam Ahmadi Sajjad Sedaghat Lida Khalaf -
Open Access Article
57 - Investigation of the adsorption of copper (II) (soluble in water) on activated carbon produced from PET outflow bottles
ali moghimi hossein anarakiIn this research, the adsorption of copper (II) metal ions on activated carbon was investigated using waste PET bottles. Initially, activated carbon was prepared using PET waste bottles and the activated carbon was characterized using XRD, FTIR, BET and SEM analyzes. Th MoreIn this research, the adsorption of copper (II) metal ions on activated carbon was investigated using waste PET bottles. Initially, activated carbon was prepared using PET waste bottles and the activated carbon was characterized using XRD, FTIR, BET and SEM analyzes. Then, the adsorption of copper (II) metal ions on the synthesized activated carbon was performed in batch mode. The effects of variables such as initial concentration of copper, temperature, pH and time were investigated and the results showed that the optimum amount of copper ion adsorption was in 50 ppm solution with a pH of 5 and a contact time of 90 minutes and an adsorbent amount of 0.1 g. Isotherms were studied using Langmuir, Freundlich and Temkin models and the adsorption kinetics was investigated using pseudo-first as well as pseudo-second order models. It was observed that the behavior of the desired process follows the Freundlich isotherm and its kinetics corresponds to the pseudo-second order reaction. Manuscript profile -
Open Access Article
58 - Enrichment of polyphenolic compounds from grape leaf extract (Vitis vinifera L.) using macroporous resin and investigating its adsorption kinetics and dynamics
Nadia Sobhani Mahshad Shahriari Mohammad Hossein Jabbari Samad Nejad Ebrahimi -
Open Access Article
59 - Removal of chromium (VI) from aqueous solution by adsorption using cousinia eryngioides boiss and activated carbon
م.ت حامد موسویان I خزایی M علی آبادیAdsorption capacity of Cr (VI) onto cousinia eryngioides boiss, activated carbon was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH, temperature, agitation speed, absorbent dose and particle s MoreAdsorption capacity of Cr (VI) onto cousinia eryngioides boiss, activated carbon was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH, temperature, agitation speed, absorbent dose and particle size. Cr (VI) removal is pH dependent and found to be maximum at pH 2.0. The amounts of Cr (VI) adsorbed increased with increase in dose of both adsorbents and their contact time. A contact time of 30 min was found to be optimum. Experimental results show low cost biosorbent were effective for the removal of pollutants from aqueous solution. The Langmuir, Freundlich and Temkin isotherm were used to describe the adsorption equilibrium studies of agrowaste. Freundlich isotherm shows better fit than Langmuir and Temkin isotherm in the temperature range studied. Manuscript profile -
Open Access Article
60 - Preparation of activated carbon from Pterocarya fraxinifolia and Isotherms and thermodynamics evaluation for Pb (II) sorption
Maryam Ghasemi Yaghob Khosravi-Fard Vida Pashang -
Open Access Article
61 - The Role of bentonite soil and Activated carbon in absorption of polycyclic Aromatic hydrocarbons of polluted wastewater in Tehran Oil Refinery
حمید Bagheri فرید Vafaei سیامک Bodaghpour S.A MirbagheriOne of the serious environmental problems that could cause irreversible ecological and economic damage to theenvironment is organic pollutants. Contamination with organic pollutants is a very serious issue that is of interestto the general public because in some cases, MoreOne of the serious environmental problems that could cause irreversible ecological and economic damage to theenvironment is organic pollutants. Contamination with organic pollutants is a very serious issue that is of interestto the general public because in some cases, it causes serious damages to the environment, soil and water as well.Polycyclic aromatic hydrocarbons which are abbreviated as PAHs are one of the major groups of organicsubstances soluble in water due to the geological conditions of the region. Various methods are used to clean uppolluted aquatic environments among which the use of oil absorbent material to remove different kinds ofcontaminants, particularly petroleum compounds and its derivatives (Polycyclic aromatic hydrocarbons) ishighly regarded. PAHs absorption by the bentonite and activated carbon is considered in this research. Then,PAHs distribution coefficient and the maximum absorption have been determined according to the results usingFreundlich absorption isotherms, and Langmuir isotherm. Results show that the bentonite has a high potential forPAHs absorption. Distribution coefficient (kd) and the maximum absorption are 0.005 L/g and 0.157 mg/g. Manuscript profile -
Open Access Article
62 - Numerical Solution and Evaluation of Variation Power and Efficiency Based on the Degenerator Length and Diameter of Beta-type Stirling Engine
Nader Rahbar Hadi Kargar Sharifabad علیرضا احمد پورThe most important part of the Stirling engine that has an important role in improving efficiency, heat recovery. Stirling cycle heat recovery is one of the important parts of that model because of the influence of various parameters is very complex. In terms of physica MoreThe most important part of the Stirling engine that has an important role in improving efficiency, heat recovery. Stirling cycle heat recovery is one of the important parts of that model because of the influence of various parameters is very complex. In terms of physical structure, heat recovery from stainless steel sheet, stainless steel net or stacked bars, are made. Over half of the engine cycle, heat recovery heat like a sponge to absorb the heat of the operating gas. In the other half cycle, recovery of heat after the gas, so less heat to ward off the cold the engine, there will be a way to increase engine efficiency. Therefore, the recovery Stirling engine reduces heat loss and thus increasing the engine's efficiency. The development of an appropriate thermodynamic model for beta type Stirling engine, has been the recovery area. This model, predict and optimize power output and performance parameters based on the physical conditions and geometric Stirling engine regenerator requirements. For this purpose, the numerical solution of beta type Stirling engine uses isothermal and adiabatic model is done. To validate the results, the geometric and functional Stirling engine manufactured by General Motors used and the results were compared with published values. Manuscript profile -
Open Access Article
63 - Adsorption Isotherm and Kinetic Study of 4- Nitrophenol Removal From Aqueous Solutions onto Carbon Nano Fibers
پروین غربانیNitroaphenol compounds and toxic dyes are considered to be the main pollutants of wastewater of various industries. These synthetic organic compounds are very toxic and one of the most persistent pollutants in the environment. Developing a simple and effective method to MoreNitroaphenol compounds and toxic dyes are considered to be the main pollutants of wastewater of various industries. These synthetic organic compounds are very toxic and one of the most persistent pollutants in the environment. Developing a simple and effective method to remove non-degradable pollutants into non-hazardous products is one of the main challenges in environmental studies. In this research, adsorption capacity removal of 4-nitrophenol (4NP) from aqueous solutions using carbon nanofibers (CNF) was investigated in a batch system by considering the effects of various parameters like contact time, adsorbent dosage, pH and initial concentration. Optimum conditions for (4NP) adsorption were found to be initial pH≈2 , carbon nanofiber (CNF) dose≈ 0.02 g and equilibrium time≈ 80 min. Results show that removal efficiency of the 4NP increased by increasing 4NP concentration and decreased by increasing the CNFs dosage and pH. Based on correlation coefficients, Langmuir gave the best fit for 4NP adsorption onto CNF. Also, the kinetic studies indicate the adsorption of 4NP onto CNF is followed a pseudo- second order kinetic. Manuscript profile -
Open Access Article
64 - Prediction of forging force and barreling behavior in isothermal hot forging of AlCuMgPb aluminum alloy using artificial neural network
hamidreza Rezaei Ashtiani p shahsavari -
Open Access Article
65 - Investigation of performance of bimodal/functionalized mesoprorous silica nanoparticles on the adsorption of methylene blue from aqueous solution
Amir Vahid -
Open Access Article
66 - Adsorption of phenol by super hydrophobic phenol-formaldehyde/silica hybrid aerogel
Mohamad Seraji Sadra Soleimankhani Hossein Abadani Jamal Davarpanah -
Open Access Article
67 - Application of response surface methodology for optimization of fluoride adsorption from aqueous solution using MgO-based nanocomposites
Abbas Rahdar Somayeh Rahdar laili Mohammadi Saiedeh Sistani Shabnam Ahmadi Md. Abu Bin Hasan Susan -
Open Access Article
68 - Adsorption of mercury from the aquatic environment using a novel nano-gel of Descurainia Sophia plant stem
arezou ghadi Masoume Habibi Soleiman Mahjoub -
Open Access Article
69 - Removal of Crystal violet Dye from Aqueous Solution Using Surfactant Modified NiFe2O4 as Nanoadsorbent; Isotherms, Thermodynamics and kinetics Studies
Nina Alizadeh Mohammad Mahjoub -
Open Access Article
70 - Investigation of performance of bimodal/functionalized mesoprorous silica nanoparticles on the adsorption of methylene blue from aqueous solution
Shahnaz Nayyeri Amir Vahid Majid Abdous Aliakbar Miran Beigi -
Open Access Article
71 - Catalytic Effects of Carbon Nanotubes on Complexation of Some Amino Acids via Cobalt Cation Catalyst
Masoumeh Piryaei -
Open Access Article
72 - Application of response surface methodology for optimization of fluoride adsorption from aqueous solution using MgO-based nanocomposites
Somayeh Rahdar Leili Mohammadi Abbas Rahdar Shahin Ahmadi Saeideh Sistani Md. Abu Bin Hasan Susan -
Open Access Article
73 - Adsorption and Optimization Removal of Co(tsPc)-4 from aqueous solution using Nanoalumina
Amir Vahid Majid Abdous Aliakbar MiranBeigi Shahnaz Nayeri -
Open Access Article
74 - Adsorption of Phenol by Super Hydrophobic Phenol-Formaldehyde/Silica Hybrid Aerogel
Mohamad Mehdi Seraji Sadra Soleimankhani Hossein Afkhami Abadani Jamal Davarpanah -
Open Access Article
75 - Adsorption of silver ions from aqueous solutions using copolymer containing sodium methacrylate functional groups
Navid Allahyar Cemal Özeroğlu -
Open Access Article
76 - Investigation of lead (II) ion removal from aqueous solutions by (3-aminopropyl) triethoxysilane-modified zeolite
Hossein Shahriyari Far Targol Rahimi Masale Nezhad Mahdi Hasanzadeh Mahboubeh RabbaniIn this study, functionalized zeolite (Zeolite-APTES) has been used to remove lead ions in an aqueous environment. Zeolites have received much attention due to their ion exchange capacity and chemical and mechanical stability. Parameters influencing the lead ion adsorpt MoreIn this study, functionalized zeolite (Zeolite-APTES) has been used to remove lead ions in an aqueous environment. Zeolites have received much attention due to their ion exchange capacity and chemical and mechanical stability. Parameters influencing the lead ion adsorption process, including adsorbent content (mg), initial concentration (ppm), pH, and time (min) were investigated and optimized using an experimental design by response surface methodology ( RSM ) approach. The results show that the lead adsorption efficiency from aqueous solution increases with increasing time and the adsorbent content and gradually reaches a constant value. The percentage of lead removal also decreases with an increasing initial concentration of lead ions. Functionalized zeolite has shown good adsorption capacity for the lead. The maximum adsorption capacity was found to be 89.28 mg.g-1. Furthermore, the adsorption follows a Langmuir isotherm and pseudo-first-order kinetic model. The developed composite exhibits great potential for heavy metal adsorption and wastewater treatment. Manuscript profile -
Open Access Article
77 - *Corresponding author Email:Journal of Applied Research in Chemistry180JARCIsotherm and kinetics model for the adsorption of As (V) from aqueous solutions on hydrothermally synthesis ZIF-8 adsorbent
زهره روستان علیمراد رشیدی مهدی برقعیIn the current study, zeolitic imidazolate framework-8 )ZIF-8( was used as a new absorbent to investigate adsorption of arsenic ion from aqueous solution. ZIF-8 crystals were successfully synthesized via hydrothermal method by applying the temperature factor. The ZIF-8 MoreIn the current study, zeolitic imidazolate framework-8 )ZIF-8( was used as a new absorbent to investigate adsorption of arsenic ion from aqueous solution. ZIF-8 crystals were successfully synthesized via hydrothermal method by applying the temperature factor. The ZIF-8 crystals were characterized by nitrogen adsorption–desorption, powder X-ray diffraction, scanning electron microscope, and Fourier transform infrared spectroscopy. Different parameters such as metal ions concentration, adsorbent dosage, contact time, and pH were evaluated in adsorption experiments. The adaptation of adsorption process was analyzed by Langmuir, Freundlich, pseudo-first-order, and pseudo-second-order models of types1-4. The specific surface area of ZIF-8 is based on BET equation of 1303 m2/g and the particle size was 70-150 nm. The kinetic and isotherm data of arsenic adsorption on ZIF-8 were well fitted by pseudo-second-order Kinetics model of type 2 and Langmuir model, with regression values of 0.963 and 0.979, respectively. In optimum condition the maximal adsorption capacity of arsenic was 69.36 mg/g. The results indicate that ZIF-8 has high ability to absorb arsenic ion without having need to adjust pH solution for most water treatment. Manuscript profile -
Open Access Article
78 - Synthesis of GO-Cu-BTC graphene oxide at the Green and in situ under solvent-free conditions by the mechanochemical methods and evaluation of kinetic and isotherm properties of cadmium removal
hamideh hamzeh ali sara mashkouri beheshteh sohrabi nazari mohammad reza naimi jamal leila panahiIn this research, GO-Cu-BTC nanocomposite was prepared at the green, in situ under solvent-free by using the mechanical method without purification. XRD and FESEM demonstrated the structure of nanocomposite. In order to investigate the application of the nanocomposites MoreIn this research, GO-Cu-BTC nanocomposite was prepared at the green, in situ under solvent-free by using the mechanical method without purification. XRD and FESEM demonstrated the structure of nanocomposite. In order to investigate the application of the nanocomposites synthesized in green conditions, cadmium heavy metal removal was studied. Here, kinetic and isotherm studies of metal removal were performed and the concentration of cadmium ions was measured by atomic absorption spectrometry. The results showed that the adsorption capacity of the cadmium by the nanocomposite adsorbent was dependent on parameters such as pH and reaction time. Optimal conditions showed that 6 mg of nanocomposite removed 94% of water-soluble cadmium at pH 8. The results showed that the isotherm data followed the Langmuir model. In this study, it is found that GO-Cu-BTC has a high ability to adsorb cadmium and can be used as a low-cost adsorbent. Manuscript profile -
Open Access Article
79 - Investigation of Lead Removal Process from Leachates around Tehran
M. Chelehei R. MarandiNowadays, increasing public concern have challenged the environmental problem associated with wastewater. Indeed, the removal of contaminates from wastewater is still far away from a satisfactory solution. Different processes are used for the treatment of wastewater. Ho MoreNowadays, increasing public concern have challenged the environmental problem associated with wastewater. Indeed, the removal of contaminates from wastewater is still far away from a satisfactory solution. Different processes are used for the treatment of wastewater. However, adsorption on activated carbon can be an environmentally friendly and economically sound process. In this study, olive-waste activated carbon as was employed as a novel adsorbent for efficient removal of lead (heavy metals). In the removal process the variables; pH, concentration of lead, amount of adsorbent and contact time, were studied on their influence on removal of lead, using one at a time approach, in a batch procedure on removal of lead which used 109 mg/g. Following the investigation of concentration effect, fitting the experimental equilibrium data to numerous conventional isotherm models showed that the Langmuir model with high correlation coefficient and low error analysis (R2=0.998) is more usable to explain the experimental data. The kinetic models were studied and parameters of this model was calculated. First order kinetics was predicted for adsorption with 0.99 error tolerance. Manuscript profile -
Open Access Article
80 - Studying Quality and Quantity of Industrial Wastewater Pollutants as a ResultofProducing Paper & Application ofGA-88Nano Absorbing for minting Phenol
A. Asadi Mazdi H. GhafourianActivated carbon with nano hole made of lemon is called GA-88 in this research. Using nano technology in the way of decreasing effects of polluting environment and wastewater of industrial factory including water plays important role and has high efficiency. In this re MoreActivated carbon with nano hole made of lemon is called GA-88 in this research. Using nano technology in the way of decreasing effects of polluting environment and wastewater of industrial factory including water plays important role and has high efficiency. In this research ability of GA-88 absorbent with nano hole for elimination of phenol has been studied. Chemical optimization of nano absorbent GA-88 has been performed by using acid phosphoric with densities 10% and 15%. Then effective factors for absorbing phenol, effect of change in pH at range of 2 to 12, time of duration until 15 to 75 minutes was exactly studies and assessed. Change in pH at lower than 7 was very effective on ability of absorption so that under pH=2 and pH=12 intensity of absorption 99.125% and 63.1% and absorption capacity 19.825% and 12.62%mg phenol /gr GA-88 /liter respectively. Time of optimization for eliminating phenol with density of 200mg/liter and 800mg/liter was at first 15 minutes. In this process the quasi second grade speed equation in comparison to quasi first grade speed equation, GA-88 nano absorbent with fixed speed is suitably defined as 5.12 x 10-3 mg-1.min-1 and 2.35mg x 10-3 for density of 200mg/liter and 800mg/liter. In order to describe balance of absorption it is used from Longmuir and Freunlich models. Results indicate that Longmuir model for both densities of 200mg/liter and 800mg/liter is more valuable than Freunlich model and R2 amount related to Longmuir was 1 and 0.999 was achieved respectively Manuscript profile -
Open Access Article
81 - Preparation and Characterization of Novel Bionanocomposite Based on Tapioca Starch/Gelatin/Nanorod-rich ZnO: Towards Finding Antimicrobial Coating for Nuts
M. M. Marvizadeh A. Mohammadi Nafchi M. Jokar -
Open Access Article
82 - Isothermal and thermodynamic studies of the adsorption of safranine on MCM-41
Ghazaleh Koutchakzadeh Zohreh Derikvand -
Open Access Article
83 - Adsorption study of patent blue VF using ginger waste material
Rais Ahmad Rajeev Kumar -
Open Access Article
84 - Kinetic and thermodynamic studies of the removal of murexide from aqueous solutions on to activated carbon
Ardeshir Shokrollahi Mehrourang Ghaedi Mojdeh Ranjbar Ameneh Alizadeh -
Open Access Article
85 - Sawdust as a natural and low cost adsorbent for the removal of brilliant cresyl blue dye from water samples
Shahla Elhami Arshia Sharali Shokooh Khaloo -
Open Access Article
86 - Removal of Dye (Blue 56) From Aqueous Solution via Adsorption onto Pistachio Shell: kinetic and isotherm study of removal process
A. Ravanpaykar A. Asfaram M. R. Fathi emadabadi -
Open Access Article
87 - Kinetics and Isotherm of Sunset Yellow Dye Adsorption on Cadmium Sulfide Nanoparticle Loaded on Activated Carbon
N. Mosallanejad A. Arami -
Open Access Article
88 - Kinetic and Thermodynamic Studies on Biosorption of Direct Red 81 from Aqueous Solutions by Chamomilla Plant
M. Momen Heravi A. Kodabande M. R. Bozorgmehr T. Ardalan P. Ardalan -
Open Access Article
89 - Investigation of Kinetics and Equilibrium Isotherms of Direct Red 12B Dye Adsorption on Hazelnut Shells
Fathi M. R. Asfaram A. -
Open Access Article
90 - Preparation of SBA-15-PAMAM as a Nano Adsorbent for Removal of Acid Red 266 from Aqueous Media: Batch Adsorption and Equilibrium Studies
Maryam Mirzaie Abosaeed Rashidi Habib-Allah Tayebi Mohammad Esmail Yazdanshenas -
Open Access Article
91 - The Effects of Ribose on Mechanical and Physicochemical Properties of Cold Water Fish Gelatin Films
Neda Javadian Habibollah Mirzai Abdorreza Mohammadi Nafchi -
Open Access Article
92 - Highly Concentrated Ferrus Removal from Groundwater Using Powdered Activated Carbon as Adsorbent
Behrouz Akbari-Adergani Neda Memarzadeh Ali Asghar Ghoreyshi Kasra Pirzadeh -
Open Access Article
93 - Response Surface Modeling and Optimization of Effective Parameters for Zn(II) Removal From Aqueous Solution Using Gracilaria Corticata
Farah Assadian Ali Niazi Majid Ramezani -
Open Access Article
94 - Adsorptive Removal of Noxious Nickel Ions from Aqueous Mediums Using Titanium Dioxide Nanoparticles: A Comparative Assessment with an Eco-friendly Adsorbent as Well as Isotherm and Kinetic Modeling
Elnaz Rezaei-Aghdam Ali Shamel Mohammad Khodadadi-Moghaddam Gholamreza Ebrahimzadeh-Rajaei Sahar Mohajeri -
Open Access Article
95 - Study of the Adsorption Performance of a Cationic Dye onto a Moroccan Clay
Brahim Abbou Imane Lebkiri Hanae Ouaddari lamya kadiri abdelkarim ouass Abdlhay Elamri Jaouad Bensalah Amar Habsaoui Ahmed Lebkiri El Housseine Rifi -
Open Access Article
96 - Modified Sawdust as an Efficient Adsorbent for the Removal of Eosin Y Dye: Optimization, Isotherm, Regeneration of Adsorbent, and Real Sample Studies
Leila Afrasiyabi Shahla Elhami Rostam ShabaniIn the current investigation, the utilization of sawdust was modified through chemical means employing diethylenetriamine. This modified form of sawdust served as an effective adsorbent for the purpose of adsorbing Eosin Y dye from aqueous samples. The chemical modifica MoreIn the current investigation, the utilization of sawdust was modified through chemical means employing diethylenetriamine. This modified form of sawdust served as an effective adsorbent for the purpose of adsorbing Eosin Y dye from aqueous samples. The chemical modification procedure was thoroughly examined, comparing the fourier transform of infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) before and after the modification. Various factors including solution pH (ranging from 2 to 6), adsorbent dosage (ranging from 0.2 to 2.0 g L-1), contact time (ranging from 5 to 35 min), agitation rate, and initial dye concentration (ranging from 20 to 1000 mg L-1) were investigated. Remarkably, the modified sawdust exhibited a notable uptake capacity at ambient temperature and successfully removed approximately 96% of the Eosin Y dye with a mere 1.2 g L-1 of adsorbent in just 5 minutes. Moreover, it was discovered that the adsorbent maintained its promising adsorption ability even after undergoing ten cycles of adsorption and desorption. The Freundlich isotherm model was employed to determine the adsorption parameters. This methodology was also implemented to eliminate dye from authentic samples of diverse water sources. Manuscript profile -
Open Access Article
97 - The Adsorption of Malachite Green from Industrial Wastewater by Oxidized Black Tea Adsorbent
Saba S.M AL-Obaidy Ahmed S. Farhood Ahmed A. Alkarimi Luma A. M. Ali Noor H. AL-Mamoori Dakhil N. Taha -
Open Access Article
98 - Removal of Amoxicillin from Aqueous Solutions by using Synthesized Highly Hydrogel Surface as a Good Adsorbent
Ibrahim J. Sahib Aseel M. Aljeboree Samaa M. Hassan Layth S. Jasim Shahad M. Qasim AyadAyad F. Alkaim -
Open Access Article
99 - Removal of Chromium (VI) from Wastewater by Palm Kernel Shell-based on a Green Method
Maryam Razavi Mehr Mohammad Hossein Fekri Faezeh Omidali Noushin Eftekhari Behrouz Akbari-adergani -
Open Access Article
100 - Study the Ability of Saccharomyces cerevisiae to Remove Methyl Green Dye from Water as a Pollutant Agent
Mohammed S.M Al-Tameemi Mustafa.R Mohammed Ali A T. Al-Sadoon -
Open Access Article
101 - Kinetic and Equilibrium Studies for Dye Adsorption onto Sugarcane Bagasse and Rice Husks
Noorul Hudai Abdullah Nur Atikah Abdul Salim Baizura Binti Hamid Muhammad Azri Nizamdin Muhammad Fauzul Mubarak Ahmad Fadhil Nurhana Syahira Azman Nur Farhan Zon Masiri Kaamin Amir Khan Suwandi Noraziah Ahmad Zainab Mat Lazim Maria Nuid Nur Azmira Zainuddin -
Open Access Article
102 - Preparation of a Novel Magnetic Nanocomposite Hydrogel Based on Carboxymethyl Chitosan for the Adsorption of Crystal Violet as Cationic Dye
Meysam Akbarzadeh Mohammad Taghi Vardini Gholam Reza Mahdavinia -
Open Access Article
103 - Adsorption Features Remove a Toxic Dye from an Aqueous Solution by a Cost-effective Palm Leaf Activated Carbon (PLAC)
Ali M. Mohammed Aseel M. Aljeboree Ahmed B. Mahdi Yasir Salam Karim Mohammed Abed Jawad Ayad F. Alkaim -
Open Access Article
104 - Theoretical and Experimental Analysis for the Removal of Dye from Aqueous Solution by Using Charcoal from Pomegranate Seeds
Lekaa Hussain Khadim -
Open Access Article
105 - Removal of Toxic Congo Red Dye from Aqueous Solution Using a Graphene Oxide/Poly (Acrylamide-Acrylic acid) Hydrogel: Characterization, Kinetics and Thermodynamics Studies
Rafid Q. Kmal Aseel M. Aljeboree Layth S. Jasim Nadher D. Radia Ayad F. Alkaim -
Open Access Article
106 - Sorption Of Cerium By The Pani / Cnt Composition From Sulfuric Chloride Solution
L.K. Ybraimzhanova N.A. Bektenov I.D. Troshkina I.V. Burakova -
Open Access Article
107 - Application of Myrtus Extracts as a Suitable Green Inhibitor for Corrosion of Steel in HCl Solution
Mansoor Bozorg Taghi Shahrabi Farahani Fatemeh EktefaThe inhibition effect of Myrtus extract on steel corrosion in 1.0 M HCl solution was investigated by means of weight loss measurements, electrochemical polarization, electrochemical impedance microscopy and chemical quantum study. The results showed that Myrtus acts as MoreThe inhibition effect of Myrtus extract on steel corrosion in 1.0 M HCl solution was investigated by means of weight loss measurements, electrochemical polarization, electrochemical impedance microscopy and chemical quantum study. The results showed that Myrtus acts as a good inhibitor and the inhibition efficiency of this compound increases with increasing inhibitor concentration and in the presence of 1000 mg/L of the inhibitor will increase to 82%. Polarization curves showed that Myrtus extract acts as an efficient mixed type inhibitor. EIS plots indicated that the polarization resistance increased and double-layer capacitance decreased upon the addition of Myrtus to the solution. The adsorption of Myrtus on the steel surface was found to obey Temkin adsorption isotherm and the values of free adsorption energy indicate the spontaneous and chemical adsorption of inhibitors on mild steel surface. Also, quantum chemical calculations were used to correlate the adsorption of two compounds of Myrtus extract with its electronic structural parameters. Manuscript profile -
Open Access Article
108 - Adsorption and Kinetics Studies of Heavy Metals Removal by MnO2 Modified Zeolite
Mehdi Irannajad Mehrdad Soleimanpour Hossein Kamran haghighiZeolites can be used as one of natural adsorbents for the removal of heavy metals. Treatment of natural zeolites with various chemicals enhances their removal capacity. In this study, manganese dioxide was used to activate the natural zeolite. The modified zeolite sampl MoreZeolites can be used as one of natural adsorbents for the removal of heavy metals. Treatment of natural zeolites with various chemicals enhances their removal capacity. In this study, manganese dioxide was used to activate the natural zeolite. The modified zeolite sample and several combinations of the synthetic wastewater were contacted together to adsorb heavy metals. The wastewater used contained heavy metal ions with various concentrations such as Cu2+, Cd2+, Zn2+, Co2+, Pb2+, and Ni2+. The adsorption isotherms of Langmuir, Freundlich, BET, and Temkin, as well as adsorption kinetic models, were used to develop models imaging the behavior of adsorption. The BET isotherm provides a model being more acceptable than the other isotherms; however, in term of the prediction of adsorption amounts (qe), its description is weaker than the Langmuir isotherm. Maximum adsorption capacities with respect to Langmuir parameters were obtained under optimal conditions as follows: Ni2+ (10.51 mg/g), Co2+ (14.87 mg/g), Zn2+ (8.97 mg/g), Cu2+ (10.59 mg/g), Cd2+ (13.69 mg/g) and Pb2+(40.65 mg/g). In addition, the pseudo-second kinetic model is more accurate than the pseudo-first order. Thus, the pseudo-second kinetic model was selected to describe the adsorption kinetics. Manuscript profile -
Open Access Article
109 - Effect of bonding time on microstructure and completion of isotherm solidification during TLP bonding of dissimilar nickel base superalloys IN738LC and Nimonic 75
Meysam Khakian Ghomi Mohammad Saeid Shahriari Saeid NateghJoining of Inconel 738 and Nimonic 75 nickel base superalloys using Ni-Cr-B-containing interlayer, MBF-80, performed by transient liquid phase process (TLP) at 1080, 1120, 1150 and 1180°C and different times. Bonding microstructure was studied using a scanning elect MoreJoining of Inconel 738 and Nimonic 75 nickel base superalloys using Ni-Cr-B-containing interlayer, MBF-80, performed by transient liquid phase process (TLP) at 1080, 1120, 1150 and 1180°C and different times. Bonding microstructure was studied using a scanning electron microscope (SEM) and a light microscope. Microstructural studies showed that in short bonding time, the microstructure consists of continuous eutectic intermetallic phases in the center line of the joint and with increasing bonding time at constant temperature, eutectic intermetallic phases gradually decrease from the bonding and finally completely disappear. In order to predict the time required to isotherm solidification completion, Fick’s diffusion equations were used and it was observed that there is a good agreement between the predicted time of isotherm solidification completion and experimental results. Manuscript profile -
Open Access Article
110 - Comparison of Isothermal Oxidation and Thermal Shock Properties of CoNiCrAlY Coating Sprayed by Atmospheric Plasma Spray and Nitrogen Gas Shrouded Plasma Spray Methods
Behzad Ghasemi Zia Valefi Saeid Taghi-ramezaniIn this research, the properties of the coating applied by conventional plasma spray and with inert gas shroud has been studied and compared, in the way that nozzle like part attached to plasma gun in order to protect the plasma jet by exiting nitrogen from the nozzle. MoreIn this research, the properties of the coating applied by conventional plasma spray and with inert gas shroud has been studied and compared, in the way that nozzle like part attached to plasma gun in order to protect the plasma jet by exiting nitrogen from the nozzle. The Microstructural characterization of the coatings was performed by optical microscope and scanning electron microscope equipped with energy dispersive spectroscope. Hardness of coatings is also measured by Vickers method under the applied load of 30 gram-force. Isothermal oxidation and thermal shock tests are done at 1000 and 950ºC respectively. Post-spray results show that the use of nitrogen gas shroud is useful and coating achieved by nitrogen shroud has less oxide and porosity and has more homogeneous structure. Results from isothermal oxidation show that TGO layer growth rate in the specimen sprayed by nitrogen shroud is less. Thermal shock test shows that the specimen sprayed by nitrogen shroud has more resistance against thermal shock due to layer by layer and regular growth of TGO and having less oxide and porosity in comparison with the same specimen sprayed without nitrogen shroud. Also, the microhardness of sprayed coating without nitrogen shroud was 35 Vikers more than the applied coating with nitrogen shroud. Manuscript profile -
Open Access Article
111 - بررسی تجربی و شبیه سازی اجزای محدود عوامل موثر در فرآیند تیگزوفورجینگ قطعه درپوش گیربکس
امین کلاه دوز سلمان نوروزی محمد بخشی جویباری سید جمال حسینی پورفرآیند شکل­دهی نیمه­جامد در ساخت قطعات نزدیک به شکل نهایی به­ویژه در صنایع خودروسازی و هواپیما سازی استفاده می­شود. به­دلیل این­که رفتار آلیاژهای نیمه جامد به صورت غیرنیوتنی بوده و وابستگی سیلانی این آلیاژها به پارامترهای زیادی مانند سیکل ح Moreفرآیند شکل­دهی نیمه­جامد در ساخت قطعات نزدیک به شکل نهایی به­ویژه در صنایع خودروسازی و هواپیما سازی استفاده می­شود. به­دلیل این­که رفتار آلیاژهای نیمه جامد به صورت غیرنیوتنی بوده و وابستگی سیلانی این آلیاژها به پارامترهای زیادی مانند سیکل حرارت­دهی مجدد، روش تولید شمشال اولیه، وغیره می­باشد، شبیه­سازی آن­ها یکی از مشکل­ترین مسایل مهندسی می­باشد. یکی از فرآیندهای شکل­دهی نیمه جامد، روش تیگزوفورجینگ است که بین دمای خط مذاب (لیکوئیدوس[1]) و خط انجماد (سالیدوس[2]) ماده انجام می­گیرد و نرخ کرنش، اصطکاک و دمای قالب از جمله عوامل تاثیر گذار بر فرآیند هستند. در این تحقیق به شبیه سازی فرایند تیگزوفورجینگ و بررسی اثر پارامترهای وابسته به آن از جمله ضریب اصطکاک، دمای فرآیند و سرعت حرکت پرس با استفاده از نرم­افزار Deform-3D پرداخته شده­است. جهت بررسی صحت شبیه­سازی، آزمایش­های عملی تیگزوفورجینگ در حالت­های مختلف و درحالت ایزوترمال بر روی آلیاژ A356 انجام شده است. مقایسه نتایج عددی با تجربی نشان داده است که در کسرهای جامد مختلف، شبیه­سازی­های مذکور به خوبی رفتار سیلان را مدل­سازی می کنند. همچنین نتایج نشان داده است که افزایش دمای قطعه باعث کاهش سختی و نیروی شکل­دهی قطعه می‎گردد که دلیل این امر رشد دانه­ها خواهد بود. در ضمن با کاهش دمای قالب به علت ریزشدن دانه­ها و با افزایش نیروی پرس، به علت تراکم فاز آلفا اولیه در دانه­ها، سختی افزایش یافته است. دمای قالب بالاتر باعث بروز ریزساختاری درشت­تر و ناهمگن در آلیاژ گردید. این امر به نوبه خود باعث کاهش تقریبی 5/12% در میزان سختی و 6/20% در مقدار تناژ پرس شد. [1]- liquidus [2]- solidus Manuscript profile -
Open Access Article
112 - Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine
nazanin parsa hassan rezaei -
Open Access Article
113 - Studying the Hinosan toxin leak into underground water Studying the Hinosan toxin leak into underground water resources using GC-ECD and its elimination by active carbon
Majid Saghi Mohammad Hosein Bigtan Ali Arasteh Nodeh Atena Nozari -
Open Access Article
114 - Phosphorus adsorption evaluation for fertilizer recommendation on three calcareous soils of Karaj region, Iran
Manouchehr FarboodiThe variability of phosphorus concentration in soil solution as adsorption point of view by different minerals could be use for phosphorus recommendation. Identity of phosphorus adsorption on mineral surfaces could be studied by different equations, which their suitabil MoreThe variability of phosphorus concentration in soil solution as adsorption point of view by different minerals could be use for phosphorus recommendation. Identity of phosphorus adsorption on mineral surfaces could be studied by different equations, which their suitability depends on the soil characteristics and the aim of research. But the main concept is based on to equilibrate the soils with electrolyte solution containing different phosphorus concentration in a distinct time and temperature. In this study, three calcareous soil samples (with 7, 14 and 21 percentages CaCO3), fine grinded (<1mm diameter) were equilibrated with five concatenations (0, 12.5, 25, 50 and 75 µgrP/ml) which prepared from K2H2PO4 in 0.01 molar CaCl2. The linear types of Froundlich and Longmuir equations were fitted with high probability (p<0.01) and were used for interpretation phenomena by three soils. The Froundlich equation had higher correlation coefficient. The maximum adsorption values (b) of Longmuir equation for Karaj, Kordamir and Aderan soil series were 65.74, 74.2 and 75. 2, and the energy constant (k) were 2.95, 3.49 and 0.43, respectively. The samples were linear to concentration value (C) as high as 0.75, 0.73 and 0.29 mg/l for Karaj, Kordami, and Aderan soil series, respectively. Manuscript profile