改性凹凸棒石处理痕量硝基苯废水  

Treatment of Trace Nitrobenzene Wastewater by Modified Attapulgite

作　　者：谢刚[1] 

机构地区：[1]兰州理工大学石油化工学院

出　　处：《上海环境科学》2008年第6期259-262,共4页Shanghai Environmental Sciences

基　　金：国家科技部政府间国际科技合作项目资助,编号:2004DFB00200。

摘　　要：研究了用聚二甲基二烯丙基氯化铵（PDMDAAC）改性凹凸棒石对微污染水中痕量硝基苯的吸附性能、影响因素及其再生后吸附效果。结果表明：PDMDAAC改性凹凸棒石对微污染水中痕量苯酚具有较强的吸附能力，在pH＝8、硝基苯浓度为50μg／L、投加量为5g／L、吸附时间30min的条件下，吸附去除率达73％；改性后的凹凸棒石可用碱进行再生，再生后对硝基苯的吸附能力没有明显下降；改性凹凸棒石的等温静态吸附曲线呈线性关系。PDMDAAC-attapulgite was prepared by modifying attapulgite with polydimethyldiallyl ammonium chloride （PDMDAAC）. Its performance of adsorption, influencing factors and adsorptive effect after regeneration for removing trace nitrobenzene from micro-polluted wastewater were investigated. It has shown that the adsorption of trace nitrobenzene by PDMDAAC-attapulgite was rather strong whilst nitrobenzene removal reaching 73% after 30 minutes under conditions of pH 8, wastewater containing 50 μg nitrobenzene/L and a dose of 5 g modified attapulgite/L. PDMDAAC-attapulgite could be regenerated with alkali and its nitrobenzene removal efficiency showed no obvious decline afterwards. Its adsorption isotherm was found to fit in with a linear relationship.

关 键 词：凹凸棒土 聚二甲基二烯丙基氯化铵 痕量硝基苯 吸附 

分 类 号：X783[环境科学与工程—环境工程] P578.94[天文地球—矿物学]