malachite green

Open Access Article

1 - Application of Electroactive Nano Composite Coated onto Wood Sawdust for the Removal of Malachite Green Dye from Textile Wastewaters
M. H. Fekri M. Banimahd keivani M. Darvishpour H. Banimahd keivani

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2 - Photo Degradation and Removal of Malachite Green from Water, Using Nano Titanium Dioxide Photo Catalyst
Mahdi Banaee Amir Zeidi Maryam Rezaei

10.22034/jest.2019.10834

Background and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a More

Background and Objective: Malachite greenis an extensively used biocide in the aquaculture industry, and is highly effective against important protozoal and fungal infections. It is also used as a food coloring agent, food additive, and medical disinfectant as well as a dye in the silk, wool, jute, leather, cotton, paper, and acrylic industries. Therefore, the elimination of malachite green in wastewater of aquaculture and textile, paper and acrylic industries is essential in order to prevent its adverse effects on aquatic organisms. In this study, degradation of malachite green with titanium dioxide nanoparticles (TiO2 NPs) under UV light was investigated. Method: For this reason, the effects of parameters such as different concentrations of malachite green (3.5, 7 and 14 mg L-1) and the Nano-catalyst concentrations (1.30, 2.60, and 5.20 mg) in constant temperature (25°C) and constant UV intensity (12 W, 230 V, 50 Hz) during 180 minutes were studied. Findings: The best degradation rate of malachite green was found in the concentration of 3.5 mg L-1 malachite green, pH: 9, and 2.60 mg of TiO2 NPs. Although with an increase in titanium dioxide nanoparticles the efficiency and removal rate of malachite green increased, the increase in the photo catalyst had no effects on increasing the efficiency of photo degradation. An increase in pH (9) may improve the removal rate of malachite green through increasing free radicals. An increase in the initial concentration of malachite green decreased the efficiency and removal rate of malachite green. Discussion and Conclusion: Therefore, the photo degradation of malachite green in the presence of TiO2 NPs photo catalyst could be a function of pH, the initial concentration of malachite green and concentration of TiO2 NPs. Manuscript profile

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3 - Removal of Cationic Dye Malachite Green from Aqueous Solutions Using a Mixture of Carrageenan and Sodium Alginate Biopolymers in the Presence of Montmorillonite Nanoclay
Behjat Farrokhi Nasim Ziaefar Hossein Sheikhloie

10.22034/jest.2020.27207.3626

Background and Objectives: Cationic dye malachite green is one of the most important toxic compounds in industrial wastewater. Typically, physicochemical or biological methods are used to water treatment and wastewater containing high concentrations of malachite green. More

Background and Objectives: Cationic dye malachite green is one of the most important toxic compounds in industrial wastewater. Typically, physicochemical or biological methods are used to water treatment and wastewater containing high concentrations of malachite green. In the present study nanocomposite hydrogels based on carrageenan and sodium alginate in the presence of sodium montmorillonite as Nano clay were synthesized and then used to study the absorption of malachite green from aqueous samples. Methods: Acrylamide was used as a monomer, methylene base acrylamide as an organic cross linker and potassium sulfate as an initiator. The adsorption of cationic dye malachite green by the nanocomposite hydrogels was investigated. The structures of nanocomposite hydrogels were investigated by (FTIR, XRD and SEM) techniques. The effect analytical parameters such as pH, contact time for the removal of dye material by synthesized nanocomposite hydrogels were investigated and optimal conditions were obtained. Finding: According to the results, synthesized nanocomposite hydrogels are sensitive to pH and changes in the amount of carrageenan and sodium alginate. Equilibrium absorption time is 3 hours. The absorption isotherm with Langmuir model and absorption kinetics was more suitable for pseudo-second order kinetic models. Discussion & Conclusion: The rate of removal of malachite green dye increases with increasing amount of Nano clay in the acidic medium. Finally, it can be concluded that the bio-polymer mixture of carrageenan and sodium alginate in the presence of sodium montmorillonite nanoclay is a suitable absorbent to remove the malachite green dye from aqueous solutions. Manuscript profile

Open Access Article

4 - Determination of Malachite Green in the Effluent Wastewater and Fish Tissues of Fish Farms in Chahar- Mahal and Bakhtiari Province
Abbas Khodabakhshi Mohammad Mahdi Amin Marzieh Vahid Dastjerdi Mohammad Ghasemiyan Afshin Ebrahimi

One of the recent environmental problems is the presence of toxic, resistant and potentiallycarcinogenic compounds such as Malachite Green (MG) in effluent wastewater and fish tissues of fishfarms. The aim of this research is the measurement of MG in the effluent wastew More

One of the recent environmental problems is the presence of toxic, resistant and potentiallycarcinogenic compounds such as Malachite Green (MG) in effluent wastewater and fish tissues of fishfarms. The aim of this research is the measurement of MG in the effluent wastewater and fish tissuesof fish farms in Chahar- Mahal and Bakhtiari province.In this descriptive cross-sectional study, from total of 50 fish farms, five farms were selected fromthree categories of large, medium, and small scales of fish farms, based on fish production capacity.During three months, effluent wastewater and fish tissue samples were taken monthly and wereanalyzed to detect MG after preparation of the samples. MG analysis was done through Cloud PointExtraction method for effluents samples and liquid chromatography mass spectrometry (LC-MS)method for fish tissue samples.The results of this study showed MG concentration in the fish tissue of fish farms, No.: 1, 2, 3, 4, 5,and 6 were 1.6, 0.27, 0.26, 0.45, 0.28, 0.32 mg/kg, respectively. MG concentration in the effluent fishfarms were in the range of 5.7 - 273 ng/l.MG concentrations in the fish tissue in this study area are more than some of international standardssuch as Australia criteria of 0.03 mg/ kg for MG that shows the widespread use of MG in the fish1- Assistant Professor, Environmental Health Group, Faculty of Health, Medical Sciences of Shahrekord, Iran2- Associate Professor, Centre of Research of Environment, Group of Environmental Health Engineers, Facultyof Health, Medical Sciences of Isfahan, Iran3- MSc. Environmental Health Group, Faculty of Health, Medical Sciences of Isfahan, Iran4- Associate Professor, Centre of Research of Environment, Group of Environmental Health Engineers, Facultyof Health, Medical Sciences of Isfahan, Iran5- Associate Professor, Centre of Research of Environment, Group of Environmental Health Engineers, Facultyof Health, Medical Sciences of Isfahan, IranJ.Env.Sci,TechJ.Env. Sci. Tech., Vol 16, No.4, Winter 2015213farms of this study area. However, the concentration of MG in the effluent of fish farms was less thanEuropean standards (Ireland) of 100μg/l. Therefore, because of carcinogenic effects of MG on humanand aquatic life, health and fisheries authorities should take serious measures to prevent the using ofMG, and they must try to use safe alternative materials. Manuscript profile

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5 - Mesoporous Carbon Modified with Iron Oxide Based Magnetic Nanomaterials for Removal of Malachite Green Dye From Aqueous Solution
Leila Torkian Alireza J. Gholinezhad

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6 - Application of Semiconductor Photocatalysis for Effective Elimination of Organic Contaminants from Sewage
Soodabe Gharibe

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7 - Application of mine waste for wastewater treatment: Efficient organic pollutant removal
Samane Ghaedi Kumars Seifpanahi-Shabani

In this research, a high porous silicate mining waste that was prepared from Syah Kamar Polymetal Porphyry mine in order to malachite green dye (MG) removal has been applied. The characterization of this natural mineral was determined using the XRD, XRF, SEM and FT-IR a More

In this research, a high porous silicate mining waste that was prepared from Syah Kamar Polymetal Porphyry mine in order to malachite green dye (MG) removal has been applied. The characterization of this natural mineral was determined using the XRD, XRF, SEM and FT-IR analysis. The MG adsorption onto high porous activated waste was studied based on the parameters of pH, temperature, adsorbent dosage, initial dye concentration and contact time. The equilibrium and kinetic adsorption models were experimentally investigated. The obtained data have suggested that the process of MG removal followed up the Sips isotherm and pseudo-second order kinetic. The thermodynamic parameters values consist of ΔG˚, ΔH˚ and ΔS˚ confirms that the adsorption of MG is spontaneous and exothermic reaction. In the optimal condition the removal of MG was more than 93%. This method has a number of advantages, including being low-cost and non-toxic and the availability of natural adsorbent. Manuscript profile

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