Adsorption Studies on the Removal of Hexavalent Chromium-Contaminated Wastewater Using Activated Carbon and Bentonite

被引：41
作者：
Wanees, Salah Abdel [1 ]
Ahmed, Abdel Monem M. [2 ]
Adam, Mohamed S. [3 ]
Mohamed, Mamdouh A. [1 ]
机构：
[1] Zagazig Univ, Dept Chem, Fac Sci, Zagazig 44519, Sharkia Provinc, Egypt
[2] Univ Alexandria, Dept Chem, Fac Sci, Alexandria, Egypt
[3] Sohag Univ, Dept Chem, Fac Sci, Sohag, Egypt
来源：
ASIAN JOURNAL OF CHEMISTRY | 2013年 / 25卷 / 15期
关键词：
Wastewater; Chromium; Activated carbon; Bentonite; Removal; AQUEOUS-SOLUTION; CR(VI) REMOVAL; ION-EXCHANGE; WASTEWATERS; SORPTION; RECOVERY; RED;
D O I：
10.14233/ajchem.2013.13559
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this study, the adsorption potential of activated carbon and bentonite for removal of Cr(VI) ions from wastewater has been investigated. The study involves batch type experiments to investigate the effect of initial concentration, adsorbent dose, agitation speed, contact time, temperature and pH of solution on adsorption process and the optimum conditions were evaluated. The adsorption process has fit pseudo-second order kinetic models. Langmuir and Freundlich adsorption isotherm models were applied to analyze adsorption data and both were found to be applicable to this adsorption process. Thermodynamic parameters, e.g., Delta G degrees, Delta S degrees and Delta H degrees of the on-going adsorption process have also been calculated and the sorption process was found to be endothermic. Finally, it can be seen that bentonite was found to be more effective for the removal of Cr(VI) than activated carbon, under the same experimental conditions.
引用
收藏
页码：8245 / 8252
页数：8
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