摘要
用十六烷基三甲基溴化铵(CTMAB)和十二烷基苯磺酸钠(SDBS)制得粉末状CTMAB阳离子有机膨润土(简称CTMAB-膨润土)和CTMAB-SDBS阴阳离子有机膨润土(简称CTMAB-SDBS-膨润土),并利用聚乙烯醇(PVA)包埋固定化技术将2种粉末状有机膨润土制成颗粒状有机膨润土,研究了粉末状与颗粒状有机膨润土对水中克百威的吸附性能。结果表明:粉末状CTMAB-膨润土和CTMAB-SDBS-膨润土对克百威的吸附效果较好,最终去除率分别为90.9%和92.5%,颗粒状CTMAB-膨润土和CTMAB-SDBS-膨润土对克百威的最终去除率分别为55.5%和60.3%;有机膨润土对克百威的吸附等温线符合Freundlich方程;颗粒状有机膨润土吸附克百威最多可重复利用6次。
Two kinds of powdery organobentonite（CTMAB-bentonite and CTMAB-SDBS-bentonite） were synthesized with cetyltrimethylammonium bromide（CTMAB） and sodium dodecyl benzene sulfonate（SDBS） as raw material respectively.These powder-organobentonites were embed-immobilization treated by polyvinyl alcohol（PVA） for preparation of granular organobentonite.The batch removal of carbofuran from aqueous solutions by adsorption on these organobentonite was investigated to compare the adsorptive capacity of powdery and granular organobentonites.The results showed that the powder-organobentonite presented better performance for carbofuran adsorption,with the carbofuran removal rate of powdery CTMAB-bentonite and CTMAB-SDBS-bentonite were 90.9% and 92.5%,and the correlated carbofuran removal rate for granule-organobentonite were 55.5% and 60.3%,respectively.While for granule-organobentonite,the solid-liquid separation was easy to implement after adsorption and it could be reused for several times.The adsorption of carbofuran on powder-organobentonites and granule-organobentonites could be described by Freundich isotherms absorption model.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2011年第6期65-70,共6页
Environmental Pollution & Control
关键词
吸附
有机膨润土
克百威
农药
adsorption
organobentonite
carbofuran
pesticide
