凹凸棒石处理阴离子表面活性剂废水  

Study on Treatment of Anionic Surfactants Wastewater by Attapulgite

作　　者：蒋白懿[1] 尹敬杰[1] 张砚[1] 李秀杰[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第1期152-155,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：建设部科技攻关项目(05-K2-9);辽宁省教育厅攻关项目(2004D081)

摘　　要：目的研究凹凸棒石吸附废水中阴离子表面活性剂LAS的可行性及处理效果,考察其吸附LAS的一般规律.方法以自配LAS水样为处理对象,比较凹凸棒石原土和不同改性方法改性的凹凸棒石对LAS的吸附效果,选择吸附剂;分析反应时间、温度和pH对经盐酸改性后的凹凸棒石吸附LAS的影响.结果用2 mol.L-1的盐酸改性的凹凸棒石吸附LAS符合Freun-dlich吸附等温式,其LAS去除率可达70.69%;反应时间越长,LAS的去除率越高,30 min时可达到较高的去除率;改性凹凸棒石在酸性和中性条件下对LAS的吸附作用明显优于碱性条件.结论改性凹凸棒石适合做含阴离子表面活性剂废水处理的吸附剂,经盐酸改性的凹凸棒石吸附效果最好.The purpose of this article is to study the feasibility to treat the wastewater containing the anionic surfactant LAS by attapulgite. Four ways as calcine, hydrochloric acid, sodium hydroxide and sodium chloride were utilized to modify the attapulgite under the different conditions. The best modified condition was confirmed. Then we utilized the optimal modified attapulgite to treat the wastewater containing the anionic surfactant LAS. The best adsorption time was investigated and the effects of the temperature and pH value were studied. The results showed that attapulgite modified by the modifier hydrochloric acid was effective to adsorb the LAS and the LAS removal rate can be up to 70.69%. The capacity and concentration relationships were well described by the Freundlich adsorption isotherm model. The best adsorption time was 30 minutes. The effect of the temperature on the treatment was not significantly affected. The LAS removal rate was higher in acidic and neutral conditions than in alkaline condition. The treatment of the wastewater containing the anionic surfactant LAS by attapulgite was feasible.

关 键 词：凹凸棒石 改性 LAS 废水 

分 类 号：X703[环境科学与工程—环境工程]