改性沸石对2,4-二氯苯酚的吸附性能研究  

STUDY ON ABSORPTION OF 2,4-DICHLOROPHENOL WITH MODIFIED ZEOLITES

作　　者：魏翔[1] 朱琨[1] 王海涛[1] 杨建涛 马娟[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《安全与环境学报》2003年第6期57-60,共4页Journal of Safety and Environment

基　　金：国家自然科学基金资助项目(编号:29977015)

摘　　要：采用溴化十六烷基三甲铵(HDTMAB)制备了改性沸石.并研究了其吸附性能的影响因素,包括HDTMAB的加入量、有机污染 物的初始质量浓度、溶液的pH值等,绘制了改性沸石吸附2,4-DCP的吸附等温线并得到了饱和吸附容量。结果表明,改性沸石对2,4 二氯苯酚(2,4-DCP)具有很好的吸附效果,实验条件下对2,4-DCP的去除率可达90％以上。The present article aims to introducing the author's method of modifying zeolites by placing hexade-cyltrimethylammonuium bromide (HDTMAB) surfactants. With the effects of HDTMAB quantity added, the author has investigat- ed in detail the initial concentration of 2,4-dichlorophenol (2,4-DCP) and the optimal conditions which may influence the properties for modified zeolites on adsorbing the organic contaminant 2,4-DCP. As is known, though the removal efficiency of 2,4-DCP can be properly improved by increasing the initial concentration of 2,4-DCP and the concentration of HDTMAB to modify zeolites, there is still an economical concentration of 15 g·L-1. The author's experimental result shows that removal efficiency gained from the aqueous solutions can be over 90%. Since pH values play a critical role in the absorption mechanism of 2,4-DCP on modified zeolites due to the existence of 2,4-DCP in aqueous solution and the sorption increased at a pH may range from 4 to 10, the sorption isotherms curves of 2,4-DCP on modified zeolites can be obtained and prove to agreed to Freundlich-Equation.

关 键 词：环境化学 改性沸石 2 4-二氯苯酚 吸附性能 溴化十六烷基三甲铵 2 4-DCP 分配作用 离子交换 

分 类 号：X131.2[环境科学与工程—环境科学] O647.31[理学—物理化学]