溶剂萃取分离地下强化抽出处理液中的污染物和表面活性剂  

Solvent extraction for separating organic pollutants and surfactants in pumped groundwater during SEAR

作　　者：李璐璐[1] 赵勇胜[1] 王贺飞[1] 苏燕[1] 秦传玉[1] 吴亚萍[1] 

机构地区：[1]吉林大学地下水资源与环境教育部重点实验室,吉林长春130000

出　　处：《中国环境科学》2014年第4期912-916,共5页China Environmental Science

基　　金：国家自然科学基金(41302183);秦传玉博士后科学基金面上资助(2013M530987)

摘　　要：以正己烷为萃取剂,SDS和Tween 80为表面活性剂,苯和硝基苯为污染物,通过批次实验研究了萃取时间、油水比、表面活性剂及污染物性质对二者分离效果的影响.结果表明,萃取时间为2h、油水比为0.1是萃取的最佳条件参数;正己烷对Tween 80和苯的分离效果较SDS好,且Tween 80浓度对分离效果影响不大;随着SDS浓度的升高,其与苯的分离效果先增大后减小,在1.375CMC时达到最佳分离效果;正己烷对苯与SDS的分离效果较硝基苯好,且分离效果随着污染物浓度的升高而增大;苯和硝基苯共存时,其与SDS的分离存在竞争作用.The subject investigated the effect of extraction time, oil/water ratio, surfactants nature and contaminant nature on separation effect, with n-hexane as extracting agent, benzene as the target pollutant, sodium dodecyl sulfate （SDS） and Tween 80as surfactants through batch experiments. The results showed that, the optimum condition parameter of extraction was 2h of extraction time and 0.1of oil water ratio. For n-hexane, the effect of separating Tween 80 and benzene was better than SDS and benzene. And Tween 80concentration had little effect on separation efficiency. The effect of separating benzene and SDS increased with the concentration of SDS firstly, then decreased with that of SDS, and at 1.375CMC reached the optimum separation efficiency. For n-hexane, the effect of separating benzene and SDS was better than nitrobenzene and SDS. And the separation efficiency increased with the concentration of pollutants. There was competition between the separation of pollutants and SDS when benzene and nitrobenzene coexisted.

关 键 词：溶剂萃取 表面活性剂 分离效果 正己烷 

分 类 号：X703[环境科学与工程—环境工程]