有机改性膨润土对氧化乐果的吸附作用  

Adsorption of Organobentonite on Omethoate from Water

作　　者：杨性坤[1] 岳闪闪[1] 王丹利[1] 尚成江[1] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2013年第4期548-550,595,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家级大学生创新创业训练项目(201210477004);河南省科技计划项目(092300410190);河南省高校科技创新团队资助(2012IRTSHN017)

摘　　要：以钙基膨润土为原料,经提纯钠化后用十二烷基三甲基溴化铵进行有机改性.探讨了有机膨润土对有机磷农药氧化乐果的吸附性能,考察了pH、温度、吸附时间以及有机膨润土用量对吸附效果的影响.结果表明,改性膨润土对水中氧化乐果的去除能力优于原土,对50 mL浓度为0.8 g/L的氧化乐果溶液,在pH值为7.0、温度25℃、吸附时间30 min、有机膨润土投加量10 g/L条件下,对氧化乐果的去除率可达80.6%.DTAB-bentonite was synthesized by inserting dodecyltrimenthylammonium bromide（DTAB） into the in- terlayer of Na-modified bentonite. The adsorption of natural and DTAB modified bentonite on organophosphorus pesti- cide omethoate was investigated using a batch equilibrium technique. The effects of pH, temperature, contact time and dosage of modified bentonite were also observed. The results showed that the DTAB modified bentonite has a better ad- sorption capacity than the unmodified sample, the removal rate to omethoate reached 80.6% at the initial concentration of omethoate was 0.8 g/L under the conditions of pH value 7.0, contact temperature of 25 %, contact time of 30 min, and dosage of modified bentonite of 10 g/L.

关 键 词：膨润土 十二烷基三甲基溴化铵 改性 氧化乐果 吸附 

分 类 号：P619.255[天文地球—矿床学] TB321[天文地球—地质学]