粘土改性条件的研究Ⅰ.膨润土的改性  

STUDY ON THE PREPARATIVE CONDITIONS OF MODIFIED-CLAY Ⅰ.THE PREPARATION OF MODIFIED-BENTONITE

作　　者：刘莺[1] 刘学良[1] 王俊德[1] 商振华[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116012

出　　处：《环境化学》2002年第2期167-171,共5页Environmental Chemistry

基　　金：中国科学院出国留学人员启动基金;大连市回国留学人员科研基金资助

摘　　要：考察了改性膨润土的致孔剂加入量、溴化十六烷基三甲胺 (CTMAB)加入量、CTMAB溶液浓度和吸附时间对CTMAB吸附量的影响 .测得加工后的膨润土对CTMAB的饱和吸附容量为 34 0 0± 30 0mg·1 0 0g- 1膨润土 .膨润土对CTMAB的吸附表现出Lang muir吸附特征 .6 0℃ ,当CTMAB的加入量为膨润土饱和吸附容量的 1 3— 1 5倍 ,CTMAB溶液浓度≥ 2mg·ml- 1,吸附时间超过 2 0h时 ,膨润土基本达到饱和吸附 .并考察了有机膨润土对于水中苯、甲苯、乙苯、邻二甲苯 (BTEX)的去除效果 .The effects of porogen quantity,CTMAB quantity,concentration of CTMAB solution and adsorption time on adsorption of CTMAB onto bentonite were examined.Saturated adsorption capacity of CTMAB onto the processed bentonite were 3400±300mg·100g -1 and the adsorption isotherm was accorded with Langmuir equation.Bentonite could attain the saturated adsorption at 60℃ when CTMAB quantity was equal to 1.3-1.5 times of saturated adsorption capacity,the concentration of CTMAB solution was larger than 2 mg·ml -1 and the adsorption time was over 20 hours.The adsorption abilities of modified-bentionite to BTEX in water were tested 10 times greater than that of unmodified bentonite.

关 键 词：膨润土 改性 BTEX 污水处理 吸附性能 

分 类 号：O647.3[理学—物理化学]