Modeling 4-Chlorophenol Removal from Aqueous Solutions by Granular Activated Carbon |
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Authors: | Mehmet Sinan Bilgili Gamze Varank Elif Sekman Selin Top Didem Özçimen Remziye Yazıcı |
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Institution: | (1) Environmental Engineering Department, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus, 34220, Esenler, Istanbul, Turkey;(2) Bioengineering Department, Faculty of Chemical–Metallurgical Engineering, Yildiz Technical University, Davutpasa Campus, 34220, Esenler, Istanbul, Turkey |
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Abstract: | Since phenols and phenolic compounds in many industrial wastewaters are toxic organic contaminants for humans and aquatic
life, to remove these compounds via the most efficient way is very important for environmental remediation treatment. In this
context, almost all of the isotherm models (Freundlich, Langmuir, Temkin, Redlich–Peterson, Sips, and Khan) for adsorption
in the literature were applied to explain the adsorption mechanism of 4-chlorophenol on activated carbon in this study. Also
theoretical modeling data were obtained using model equations; interpolation and analysis of variance were made to compare
data by using statistics software. In addition, the thermodynamic and kinetic studies for adsorption mechanism were included
in the article. The adsorption of 4-chlorophenol on activated carbon fits well to the pseudo-first-order kinetic model than
the pseudo-second-order, intraparticular diffusion and Bangham models. It is also indicated that 4-chlorophenol adsorption
by granular activated carbon would be attributed to a type of transition between physical and chemical adsorption rather than
a pure physical or chemical adsorption process. As a result, an environmental remediation problem and the adsorption mechanism
on activated carbon that can be regarded as a solution to this problem are described and explained using the mathematical
models and calculations in this study. |
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