Continuous fixed-bed column studies were carried out using nano graphene oxide adsorbent for the removal of 4-chlorophenol in a contaminated aquatic solution. The adsorbents were characterized by X-ray diffraction analysis and scanning electron microscope analysis. Variables in the adsorption process were bed depths, (5, 10 and 15 cm), flow rate (1, 2 and 4 ml/min), influent 4-chlorophenol concentrations (5, 10, 15, 20 and 30 mg/l) and influent solution pH (6–7). The column sorption process was found to perform better at lower influent 4-chlorophenol concentration, lower flow rate and higher bed depth. The highest adsorption capacity (145.2 mg/g) on a 5 mg/l 4-chlorophenol solution was achieved within a flow rate of 1 ml/min and a bed depth of 15 cm. The results of this study have shown that 4-chlorophenol can be effectively adsorbed on nano graphene oxide. Thomas and Yoon–Nelson models were successfully used for predicting breakthrough curves for 4-chlorophenol removal by a fixed bed of nano graphene oxide using different flow rates and bed depths. The breakthrough time and exhaustion time decreased with increasing flow rate, decreasing bed depth and increasing influent 4-chlorophenol concentration.
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24 March 2016
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
December 11 2015
Modeling of the adsorption breakthrough behaviors of 4-chlorophenol in a fixed bed of nano graphene oxide adsorbent
Maryam Khashij;
Maryam Khashij
1Environmental Health Engineering, Shahid Beheshti University of Medical Science, Tehran, Iran
3Environmental Health Engineering Department, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
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Ahmad Moheb;
Ahmad Moheb
2Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
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Mohammad Mehralian;
1Environmental Health Engineering, Shahid Beheshti University of Medical Science, Tehran, Iran
E-mail: [email protected]
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Mostafa Gharloghi
Mostafa Gharloghi
1Environmental Health Engineering, Shahid Beheshti University of Medical Science, Tehran, Iran
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Journal of Water Supply: Research and Technology-Aqua (2016) 65 (2): 127–134.
Article history
Received:
June 11 2015
Accepted:
November 01 2015
Citation
Maryam Khashij, Ahmad Moheb, Mohammad Mehralian, Mostafa Gharloghi; Modeling of the adsorption breakthrough behaviors of 4-chlorophenol in a fixed bed of nano graphene oxide adsorbent. Journal of Water Supply: Research and Technology-Aqua 24 March 2016; 65 (2): 127–134. doi: https://doi.org/10.2166/aqua.2015.077
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