Zinc oxide nanorod‐loaded activated carbon for ultrasound‐assisted adsorption of safranin O: Central composite design and genetic algorithm optimization |
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| Authors: | E. Sharifpour M. Ghaedi F. Nasiri Azad K. Dashtian H. Hadadi M.K. Purkait |
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| Affiliation: | 1. Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran;2. Chemistry Department, Yasouj University, Yasouj, Iran;3. Department of Chemistry, Faculty of Sciences, Shahrekord University, Shahrekord, Iran;4. Nanotechnology Research Center, Shahrekord University, Shahrekord, Iran;5. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India |
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| Abstract: | This paper focuses on the development of an effective methodology to obtain the optimum ultrasonic‐assisted removal of a dye, safranin O (SO), under optimum conditions that maximize the removal percentage, using ZnO nanorod‐loaded activated carbon (ZnO‐NRs‐AC) in aqueous solution. Central composite design coupled with genetic algorithm was used for parameter optimization. The effects of variables such as pH, initial dye concentration, mass of ZnO‐NRs‐AC and sonication time were studied. The interactive and main effects of these variables were evaluated using analysis of variance. The structural and physicochemical properties of the ZnO‐NRs‐AC adsorbent were investigated using field emission scanning electron microscopy and X‐ray diffraction. Adsorption equilibrium data were fitted well with the Langmuir isotherm and the maximum monolayer capacity was found to be 32.06 mg g?1. Studies of the adsorption kinetics of the SO dye showed a rapid sorption dynamic with a pseudo‐second‐order kinetic model, suggesting a chemisorption mechanism. |
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| Keywords: | genetic algorithm response surface methodology safranin O ultrasonic‐assisted removal ZnO nanorods |
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