改性凹凸棒石吸附痕量硝基苯的试验研究  

Study on Adsorption of Trace Nitrobenzene 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,甘肃兰州730050

出　　处：《西华大学学报（自然科学版）》2009年第1期81-84,共4页Journal of Xihua University:Natural Science Edition

基　　金：国家科技部"政府间国际科技合作项目"(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 polydimethy ldiallyl ammonium chloride （PDM- DAAC）. The performance of adsorption, influencing factors and adsorptive effect after regeneration for removing trace nitrobenzene from micro-pulluted water by PDMDAAC-attapulgite were investigated. The results showed that the adsorption of trace nitrobenzen by PDMDAAC-attapulgite was better and the removal efficiency for nitrobenzen of the PDMDAAC-attapulgite could reach 73%. PDM- DAAC-attapulgite could be regenerated with alkali and the removal efficiency of nitrobenzen by the regenerated sorbent did not drop obviously. The sorption isotherm shows a linear relationship.

关 键 词：凹凸棒石 PDMDAAC 痕量硝基苯 吸附 

分 类 号：X52[环境科学与工程—环境工程]