Choi Hyun-Doc, Cho Jung-Min, Baek Kitae, Yang Jung-Seok, Lee Jae-Young
Department of Environmental Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi, Gyeongbuk 730 701, Republic of Korea.
J Hazard Mater. 2009 Jan 30;161(2-3):1565-8. doi: 10.1016/j.jhazmat.2008.04.067. Epub 2008 Apr 24.
The effect of a cationic surfactant on the adsorption of Cr(VI) on activated carbon was investigated using cetylpyridinium chloride (CPC). At a concentration below the critical micelle concentration (CMC) of CPC, the adsorption of CPC and Cr(VI) reached equilibrium within 60 min, while it took 180 min at the concentration above CMC. CPC decreased the adsorption rate of Cr(VI) and increased the adsorption amount of Cr(VI) onto activated carbon. To analyze adsorption phenomena of Cr(VI), adsorption kinetic and isotherm were used and fitted well with the pseudo-second order kinetic model and Langmuir adsorption model, respectively. CPC introduced a cationic functional group on the surface of activated carbon and provided an adsorption site for Cr(VI).
使用十六烷基吡啶氯化物（CPC）研究了阳离子表面活性剂对六价铬（Cr(VI)）在活性炭上吸附的影响。在低于CPC临界胶束浓度（CMC）的浓度下，CPC和Cr(VI)的吸附在60分钟内达到平衡，而在高于CMC的浓度下则需要180分钟。CPC降低了Cr(VI)的吸附速率，但增加了Cr(VI)在活性炭上的吸附量。为了分析Cr(VI)的吸附现象，采用了吸附动力学和等温线，分别与准二级动力学模型和朗缪尔吸附模型拟合良好。CPC在活性炭表面引入了阳离子官能团，并为Cr(VI)提供了吸附位点。
