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بهداشت و توسعه، جلد ۹، شماره ۲، صفحات ۱۵۲-۱۶۶
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عنوان انگلیسی Studying the Kinetics and Isotherms of Malachite Green Removal from Aqueous Solutions using Silica Nano-Adsorbent SBA-15
چکیده انگلیسی مقاله Background: Malachite green is a chemical pollutant and carcinogenic agent that is often used in some food and aquaculture industries to increase the production of aquatic products. Therefore, the removal of this pollutant before the discharge of the mentioned industrial wastewater in the aquatic environment is very important. The purpose of this study was to synthesize SBA-15 silica nano-adsorbent for the removal of cationic dye of malachite green from aqueous solutions and to investigate the kinetic and isotermic models, in order to built mathematical models for eliminating this pollutant dye. Methods: This experimental study was conducted on a laboratory scale. In this study, malachite green adsorption as a cationic color was studied on SBA-15 silica nano-adsorbent. The synthesis of this nano-adsorbent was carried out using the hydrothermal method. Data were presented in kinetic models of pseudo-first, second, Alovich, and intra-particle infiltration and isotherm models of Langmuir and Freundlich. FT-IR, XRD, and SEM were used to determine the characteristics of SBA-15 nano-adsorbent. Results: The data at the time of equilibrium were highly consistent with the Langmuir isotherm model. The maximum removal rate was 98%, with an adsorbent amount of 0.01 g/l, an initial concentration of 10 mg/l, pH=10, and contact time 120 minutes. Kinetic studies showed that the highest adsorption of malachite green followed the 2-hour contact time of the pseudo-second-order kinetic model, and intra-particle infiltration was also a speed controller. Conclusion: The results of this study showed that SBA-15 silica nano-adsorbent had high adsorption capacity for malachite green cationic dye and is recommended in the treatment of industrial wastewater with this colored pollutant.
کلیدواژه‌های انگلیسی مقاله Malachite Green, Aquaculture Industry, Nano-Adsorbent, SBA-15, Hydrothermal Method
نویسندگان مقاله Amir Zeidi |


Farzad Mehrjo |
1- PhD Student, Department of Environmental Pollution, Faculty of Natural Resources and Environment, Birjand University, Birjand, Iran

Reza Alizadeh |


نشانی اینترنتی http://jhad.kmu.ac.ir/article_91504_a2fff53beddfb5cb855962290e696f70.pdf
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