活性炭纤维对水中3,4-二氯苯胺的吸附行为  

Sorption of Aqueous 3,4-dichloroaniline by Activated Carbon Fiber

作　　者：王卫平[1] 郑正[1] 马艳[1] 李坤权[1] 张继彪[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,江苏南京210093

出　　处：《农业环境科学学报》2009年第2期371-374,共4页Journal of Agro-Environment Science

基　　金：国家自然科学基金(10475040);上海同济高廷耀环保科技发展基金会资助

摘　　要：通过静态吸附实验和动态吸附实验,研究了pH值、电解质(NaCl)、活性炭纤维用量等因素对用棉花秸秆制备的活性炭纤维吸附水中3,4-二氯苯胺的影响,同时从动力学和热力学角度考察了活性炭纤维对3,4-二氯苯胺的吸附行为。结果表明,棉花秸秆制备的活性炭纤维可以有效地吸附3,4-二氯苯胺,电解质(NaCl)的存在对吸附有抑制作用;准二级动力学模型能够很好地描述3,4-二氯苯胺在活性炭纤维上的吸附行为;吸附等温线符合Langmuir方程,吸附行为是一个自发放热的物理吸附过程。The effect of activated carbon fiber prepared from cotton straw （CS-ACF）on the sorption behavior of aqueous 3, 4-dichloroaniline was studied. The kinetics, thermodynamics, and the main factors affecting adsorption, such as pH, NaCl and activated carbon fiber dose were also investigated. The results indicated that the activated carbon fiber could effectively adsorb 3, 4-dichloroaniline, and that NaCl inhibited the adsorption. The adsorption of 3, 4-dichloroanitine by activated carbon fiber followed the pseudo second-order kinetic model. The equi- librium data fitted the Langmuir equation well, which showed that the process conformed to the mechanism of the Langmuir model.AG and AH were both negative, so the adsorption was spontaneous and exothermic.

关 键 词：活性炭纤维 3 4-二氯苯胺 吸附 动力学 热力学 

分 类 号：X703.1[环境科学与工程—环境工程]