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Open Access Article

1 - Methylene blue Adsorption from Aqueous Solution using magnetite-oak adsorbent
Farhad Salimi Sarie Pire

10.30495/jest.2022.28708.3742

Background 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 More

Background 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

2 - Evaluation of cumin stem powder efficiency in Methylene blue removal from aqueous solutions
Somaye Rahdar Morteza Ahmadabadi Edrise Bazrafshan Mahmoud Taghavi

Methylene blue (MB) is a most common paint for dying and it can cause eye burns, breathingproblem, heart rate increasing, nausea, diarrhea, and vomiting, gastritis, shock, cyanosis, jaundice,quadriplegia, and tissue necrosis in humans. In this study, cumin stem powder h More

Methylene blue (MB) is a most common paint for dying and it can cause eye burns, breathingproblem, heart rate increasing, nausea, diarrhea, and vomiting, gastritis, shock, cyanosis, jaundice,quadriplegia, and tissue necrosis in humans. In this study, cumin stem powder has been used as a lowcost adsorbent for the removal of Methylene blue dye from aqueous solutions.In this experimental study, the efficiency of cumin stem powder in removal of methylene blue and theeffect of effecting operating parameters such as pH (2-12), reaction time (5-210 min), adsorbentdosage (0.1-2 g/l) and initial concentration of dye (10-100 mg/l) on color removal from syntheticwastewater were studied.The results showed that the maximum removal efficiency of methylene blue 93% was achieved atoptimum condition: pH 11, reaction time 90 min, adsorbent dosage 0.5 g/l and initial dyeconcentration 100 mg/l. The results of isotherm study revealed well fitting of the experimental datawith Freundlich (R2=0.9913).According to results of this study, it was found that the cumin stem powder has a high capacity toremove methylene blue dye from aqueous solution and textile industry wastewater. Manuscript profile

Open Access Article

3 - Comparison of the Efficiency of Iodine Solution, Methylene Blue and Potassium Permanganate for Disinfection of Stellate Sturgeon Acipenser stellatus(Pallas, 1771) Eggs
Abdolali Rahdari Bahram Falahatkar Hossein Mohammadi Samad Darvishi

Inroduction & Objective:Considering the importance of stellate sturgeon fish as endangered species, the artificial breeding plays an important role in the restoration of natural resources of this fish in the Caspian Sea. One of the essential activities in the incubation More

Inroduction & Objective:Considering the importance of stellate sturgeon fish as endangered species, the artificial breeding plays an important role in the restoration of natural resources of this fish in the Caspian Sea. One of the essential activities in the incubation period is disinfection of eggs, which if done correctly can increase survival and larvae production. Therefore, finding the best approach for disinfection of stellate sturgeon eggs is so necessary.Material and Methods:Eggs were artificially fertilized and subjected to a bath dip treatment in given concentrations of the above chemicals before being incubating. Prior to treatment, the eggs were splited into three disinfected groups (100 mg L-1 iodophor, 15 min; 20 mg L-1 potassium permanganate, 30 min exposure and 100 mg L-1 methylene blue; 2 hours and) and non-disinfected group (control). Then, the eggs were transferred to Yushchenko incubators for incubation. During the incubation period, fungal and dead eggs were separate and counted physically every day. After hatching, the numbers of larvae per box were counted separately.Results: Eggs that disinfected with iodine solution and methylene blue were less likely to fungal infection and their conversion to larvae was higher than eggs that disinfected with potassium permanganate and the control group.Conclusion: The study showed that using iodine solution to disinfect stellate sturgeon is more effective and easier than some other disinfectants. Manuscript profile

Open Access Article

4 - Performance of GO-Fe3O4-ZnO nanocomposite as a photocatalyst for removal of methylene blue and methyl orange in the presence of visible light
Hassan Molanezhad Farzaneh Ebrahimzadeh

In this paper, graphene oxide is applied as a substrate for the synthesis of the magnetic graphene oxide-zinc oxide nanocomposite. The prepared nanocomposite (GO–ZnO–Fe3O4) are characterized using Field emission scanning electron microscopy(FESEM) and vibrat More

In this paper, graphene oxide is applied as a substrate for the synthesis of the magnetic graphene oxide-zinc oxide nanocomposite. The prepared nanocomposite (GO–ZnO–Fe3O4) are characterized using Field emission scanning electron microscopy(FESEM) and vibrating sample magnetometer(VSM). The photocatalytic performance of the synthesized samples is evaluated according to the photodegradation of methylene blue and methyl orang as organic dyes pollutant. The results of studies on the removal of dye pollution with a UV-Vis spectrometer showed that the removal of methylene blue dye is done completely in a short time and in the presence of sunlight. One of the advantages of the above nanocomposite is its very cheap, convenient and cost-effective synthesis. Manuscript profile

Open Access Article

5 - Removal of methylene blue with the help of surface adsorption by Fe3O4@GT magnetic nanocomposite
hossein abaastabar ali zandi ali saffar

One of today's environmental issues is the creation of sewage containing organic dyes by dyeing industries. These pollutants have caused many damages to humans and other creatures. In this project, Fe3O4@GT nanocomposite was synthesized by Fe3O4 magnetic nanoparticles a More

One of today's environmental issues is the creation of sewage containing organic dyes by dyeing industries. These pollutants have caused many damages to humans and other creatures. In this project, Fe3O4@GT nanocomposite was synthesized by Fe3O4 magnetic nanoparticles and tragacanth gum. tragacanth gum was used as an important and functional component to improve absorption speed. Then, with the help of this nanocomposite, the removal quality of methylene blue was checked. Conditions such as the amount of absorbent, the amount of methylene blue, the pH of the environment and the temperature of the environment were investigated in the quality of removal of methylene blue, and Taguchi method was used to find the optimal results. XRD, FTIR, DLS, SEM, and VSM were used for sample analysis. FTIR results proved the presence of functional groups of tragacanth hydrogel on the surface of nanoparticles. The particle size of the nanocomposite obtained by DLS method was 96.24 nm and the VSM value for the nanocomposite was 31.33 emu/g. The optimum condition of the adsorbent was in alkaline pH and the high amount of pollutant reduced the adsorption percentage. Increasing the ambient temperature improved absorption. It was found that Fe3O4@GT nanocomposite has a high adsorption performance on methylene blue with a removal rate of 86.4% after 4 hours. Manuscript profile

Open Access Article

6 - Performance of carboxymethyl cellulose and alginate nanocomposite hydrogel containing graphene oxide nanosheets for removal of methylene blue dye
سید جمال الدین پیغمبردوست Abbas Mostafaei Parisa Mohammadzadeh Pakdel Mousa Mohammadpourfard

Today, with the development of industries and urbanization, the need for healthy water have increased. Hydrogels are effective adsorbents for removing pollutants from water sources. In this research, graphene oxide (GO) nanosheets were used to improve the performance of More

Today, with the development of industries and urbanization, the need for healthy water have increased. Hydrogels are effective adsorbents for removing pollutants from water sources. In this research, graphene oxide (GO) nanosheets were used to improve the performance of methylene blue dye removal by carboxymethyl cellulose hydrogel and alginate, which were biocompatible. Carboxymethyl cellulose and alginate nanocomposite hydrogels containing graphene oxide nanosheets showed good performance compared to hydrogels synthesized by chemical method. The synthesized adsorbents were characterized by thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM). Different weight percentages of GO (0-10 wt. %) were incorporated in the hydrogel matrix and obtained optimal value was 6 wt. %. The obtained removal efficiency was 65.4 and 73.1 % for CMC/Alg and CMC/Alg/GO, respectively, under optimal conditions (initial concentration of 56 mg/l, adsorbent dose of 1.5 g/l, 120 min contact time, and 25 °C temperature). Analysis of kinetic data showed that the pseudo-second-order model had R2 order of 0.986 and 0.983 for CMC/Alg and CMC/Alg/GO adsorbents, respectively. Therefore, it was the most suitable model for kinetic data fitting. Monolayer adsorption capacity for CMC/Alg and CMC/Alg/GO adsorbents was 91.74 and 96.15 mg/g, respectively, which showed the improvement of the adsorption by incorporation of GO. Thermodynamic investigation showed that the adsorption process is spontaneous and endothermic. Finally, it can be concluded that the synthesized nanocomposite hydrogel can be used as an effective adsorbent for the decontamination of methylene blue dye. Manuscript profile

Open Access Article

7 - Methylene blue removal in a batch reactor using synthesized CdO nanoparticles
Kasra Behzad Parisa Attarzade Afarin Bahrami

10.30495/jacr.2021.682528

In the present research, CdO nanoparticles were synthesized using the chemical reduction method at six different temperatures. Due to have different calcination temperature, the nanoparticle were synthesized in different sizes. Structural and optical properties of nanop More

In the present research, CdO nanoparticles were synthesized using the chemical reduction method at six different temperatures. Due to have different calcination temperature, the nanoparticle were synthesized in different sizes. Structural and optical properties of nanoparticles were characterized using XRD and UV-Vis spectroscopy. Based on the results, the CdO nanoparticles have cubic structure with the particles size of 27 – 60 nanometer. To investigate the photocatalytic properties of CdO nanoparticles, dye degradation effect in the presence of CdO nanoparticles and UV beam was study in a batch reactor as a function of time at three different pH values. Studies have shown that the optical absorption was decrease as a function of time. The photocatalytic reaction revealed that the dye degradation in methylene blue was speeded up with increasing the pH value. Manuscript profile

Open Access Article

8 - Core–shell TiO2 coated magnetic mesoporous Nanocomposite modified with a surfactant for the removal of methylene blue dye from environmental water samples
maryam ezoddin laleh adl nasab

In this study, a core–shell TiO2 coated magnetic mesoporous nanocomposite (Fe3O4@MCM@TiO2) was synthesized and modified with an anionic surfactant for the removal of a cationic dye, (methylene blue) from well and wastewater samples. Fe3O4 was loaded on mesopore (M More

In this study, a core–shell TiO2 coated magnetic mesoporous nanocomposite (Fe3O4@MCM@TiO2) was synthesized and modified with an anionic surfactant for the removal of a cationic dye, (methylene blue) from well and wastewater samples. Fe3O4 was loaded on mesopore (MCM-41) and coated with TiO2 as a nano platelet shell. An anionic surfactant, sodium dodecyl sulfate (SDS), was used to modify the adsorbent through hemimicelles/admicelles process and also to prevent the agglomeration of the adsorbent. The surface chemical characteristics and morphology of the prepared Fe3O4@MCM@TiO2were studied by the Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Field emission scanning electron microscope (FESEM), and Brunauer-Emmett-Teller (BET) analytical techniques. The effect of effective parameters for the removal of methylene blue was also studied. The adsorption data fitted with the Langmuir model showed a short equilibrium time with the maximum capacity uptake of 227.27 mg g-1. This method was successfully applied for removal of methylene blue in environmental water samples with an appropriate recovery in the range of 89.0 and 94.2%. Manuscript profile

Open Access Article

9 - مقایسه اثرات کلریدسدیم و متیلن بلو بر فلور باکتریایی محیط پرورشی، پوست و آبشش بچه تاس ماهی ایرانی Acipenser persicus
رقیه فتح الهی حسین خارا ذبیح الله پژند علیرضا شناور ماسوله بتول مشتاقی زهرا منافی

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Open Access Article

10 - Evaluation of the photocatalytic activity of ZnFe2O4-TiO2 composite coating elaborated by flame spraying process
امیرحسین نویدپور مهدی صالحی مهدی امیرنصر حمید رضا سلیمی جزی مهران آذرپور سیاهکلی یعقوب کلانتری

Among various techniques which have been used for degradation of chemical pollutants, advanced oxidation processes (such as photocatalytic process) have received attention due to their specific properties. In this investigation, ZnFe2O4-10wt% TiO2 composite film was ela More

Among various techniques which have been used for degradation of chemical pollutants, advanced oxidation processes (such as photocatalytic process) have received attention due to their specific properties. In this investigation, ZnFe2O4-10wt% TiO2 composite film was elaborated using flame spraying process. Powders of titania (TiO2: 75vol. % anatase, 25vol. % rutile) and zinc ferrite (ZnFe2O4), which was synthesized by mechanical alloying process, were mixed together (weight ratio of 1:9) and deposited on stainless steel 316 substrate. In order to evaluate the structure, morphology, and photo-adsorption ability of the coating, X-ray diffractometer (XRD), scanning electron microscopy (SEM), and UV-VIS-NIR spectroscopy were used, respectively. Photocatalytic performance of the deposited film was studied by bleaching of aquatic methylene blue solution with the concentration of 5 mg/Lit. The results showed that the composite coating, which was elaborated by flame spraying, possesses relatively good photo-adsorption ability as well as photocatalytic activity for photodegradation of methylene blue (under visible light irradiation). Manuscript profile

Open Access Article

11 - Investigating the catalytic effectiveness of mil 101 chromium nanocomposite on cobalt ferrite in removing methylene blue dye and COD from aqueous solutions
Tayebeh Tabatabaie Abbasali Mokhtari andani saeed Farhadi saeed Farhadi Bahman Ramavandi

In this study, for preparing a novel magnetic nanocatalyst using for removing organic pollutants from waste water, magnetic MIL-101(Cr) on CoFe2O4 nanocomposite was synthesized via hydrothermal method. The nanocomposite were fully characterized via field emission scann More

In this study, for preparing a novel magnetic nanocatalyst using for removing organic pollutants from waste water, magnetic MIL-101(Cr) on CoFe2O4 nanocomposite was synthesized via hydrothermal method. The nanocomposite were fully characterized via field emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), UV-visible spectroscopy (UV-visible) and BET surface area analysis and all approved synthesizing such a nanocomposite. The sonocatalytic activity of the synthesized MIL-101(Cr)-based magnetic nanocomposite was explored for the degradation of Methylene blue (MB) under ultrasound irradiation in the presence of green and mild (environmental friendly) hydrogen peroxide as an advanced oxidation process and also, the most influencing factors on its sonocatalytic activity were tested. In sum, the optimized conditions for 86% degradation efficiency for initial dye concentration of 25 mg/L were the time of 140 min, 60 mmol/L hydrogen peroxide and 0.5 g nanocomposite. Also, COD reduction of natural medias in presence of nanocomposite was studied and %73.3 calculated for effluent of Wastewater treatment Plants. In cost-benefit calculations, the cost of this process scaling up for COD reduction of each cubic meter of dye effluent treatment plants in dye industries, considering the cost of nanocomposite preparation, cost of hydrogen peroxide preparation, consuming electricity, pH adjustment and also 4 time reusing of recycled nanocomposite from the effluent was approximately calculated 5-9 million Rials . Finally, the nanocomposite was magnetically separated and reused four consecutive runs of dye degradation without any observable change in its structure. Manuscript profile

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