粘土改性条件的研究Ⅱ.沸石的改性  

STUDY ON THE PREPARATIVE CONDITIONS OF MODIFIED-CLAY Ⅱ.THE PREPARATION OF MODIFIED-ZEOLITE

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172-176,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：考察了改性沸石的CTMAB加入量、CTMAB溶液浓度和吸附时间对CTMAB吸附量的影响 .测得沸石对CTMAB的饱和吸附容量为 6 5 0 0± 1 0 0mg·1 0 0g- 1沸石 ,明显高于改性膨润土的饱和吸附量 ,吸附符合Langmuir吸附特征 . 2 5℃时 ,当CTMAB的加入量为沸石饱和吸附容量的 1 1— 1 2倍 ,CTMAB溶液浓度≥ 1 6mg·ml- 1,吸附时间超过 6h时 ,沸石基本达到饱和吸附 .考察了有机沸石对于水中BTEX的去除效果 .并对沸石和膨润土的性质进行了比较 .The effects of CTMAB quantity,concentration of CTMAB solution and adsorption time on the adsorption of CTMAB onto zeolite surface were examined.Saturated adsorption capacity of zeolite to CTMAB were 6500±100mg·100g -1 and the adsorption isotherm was accorded with Langmuir equation.The zeolite could attain the saturated adsorption at 25℃ when CTMAB quantity was equal to 1.1-1.2 times of saturated adsorption capacity,the concentration of CTMAB solution was larger than 1.6 mg·ml -1 and the adsorption time was over 6 hours.The adsorption abilities of BTEX in water by modified-zeolite were tested 40 times greater than that of unmodified zeolite.The properties of zeolite and bentonite were compared.

关 键 词：沸石 改性 BTEX 污水处理 膨润土 废水处理 吸附 

分 类 号：O647.3[理学—物理化学]