改性膨润土对地下水中BTEX的吸附研究  

Adsorption of BTEX in groundwater by modified bentonite

作　　者：刘景楠[1] 崔康平[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2015年第12期1683-1687,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41072194);国家水体污染控制与治理科技重大专项资助项目(2012ZX07205-002)

摘　　要：文章利用实验室制备的改性膨润土材料,研究了其吸附地下水中的苯系物（苯、甲苯、乙苯和二甲苯,简称BTEX）的动力学。结果表明,在BTEX初始质量浓度为50~250mg/L时,改性膨润土对地下水中的BTEX吸附动力学符合准二级速率方程,改性膨润土对地下水中的BTEX的吸附符合Langmuir和Freundlich等温吸附方程。实验还表明,改性膨润土对地下水中BTEX的吸附性能优于未改性的膨润土。The modified bentonite material was prepared in the laboratory, and the adsorption of benzene, toluene, ethylbenzene and xylenes（BTEX） in the groundwater by modified bentonite was investigated. The adsorption rate data were consistent with the predictions of the pseudo-second order rate equation within the initial BTEX concentration of 50-250 mg/L, and the adsorption capacity data were in accordance with both Langmuir and Freundlich isotherm models. The adsorption experimental data also show that modified bentonite was more effective than unmodified bentonite in removing BTEX in groundwater.

关 键 词：改性膨润土 苯、甲苯、乙苯和二甲苯(BTEX) 吸附量 动力学 等温吸附 

分 类 号：X783.1[环境科学与工程—环境工程]