有机凹凸棒土对二氯苯酚的吸附研究  

Study of dichlorophenol adsorption by organic attapulgite

作　　者：孙玉凤[1] 刘总堂[1] 费正皓[1] 王京平[1] 施卫忠[1] 

机构地区：[1]江苏省滩涂生物资源与环境保护重点建设实验室,盐城师范学院,江苏盐城224002

出　　处：《化学研究与应用》2012年第6期854-859,共6页Chemical Research and Application

基　　金：江苏省滩涂生物资源与环境保护重点建设实验室开放课题项目(JLCBE08003)资助;国家自然科学基金项目(21077087)资助

摘　　要：本研究采用超声法用十六烷基三甲基溴化铵改性凹凸棒土制得了有机凹凸棒土(HDTMA-凹凸棒土),并采用XRD和FT-IR对其结构进行了表征。通过吸附实验研究了HDTMA-凹凸棒土对水溶液中二氯苯酚的吸附性能和吸附机理。结果表明:经有机改性后,HDTMA+成功进入到凹凸棒土的层间,HDTMA-凹凸棒土对二氯苯酚的吸附量比未改性凹凸棒土增大了近20倍。Freundlich方程能够较好的描述吸附等温线。二氯苯酚在HDTMA-凹凸棒土上主要是焓推动为主的物理吸附过程,且吸附过程放热。Attapulgite was modified with the surfactant of hexadecyltrimethyl-ammonium bromide（HI）TMA-Br） by ultrasonic to ob- tain the organic-modified HDTMA-attapulgite. The HDTMA-attapulgite was characterized by XRD and FT-IIL The adsorption capac- ity and mechanism of dichlorophenols absorbed onto HDTMA-attapulgaite had been studied. The analysis indicated that HDTMA＊ were intercalated on the interlayered of attapulgaite. The adsorption capacities of dichlorophenols on HDTMA-attapulgite were about 20 times higher than that on natural attapulgite. Frcundlieh isotherm equation models could describe the adsorption data perfectl- ly. The adsorption process of dichlorophenols onto HSTMA-attapulgite was physical adsorption which was mainly promoted by en- thalpy and it was exothermic.

关 键 词：凹凸棒土 有机改性 二氯苯酚 吸附 

分 类 号：X131[环境科学与工程—环境科学]