摘要
以溴化十六烷基三甲铵为改性剂 ,对天然钙基膨润土进行有机化改性 ,系统地研究了改性剂用量以及钠化、热活化和酸活化对有机膨润土吸附苯酚、苯胺、苯、甲苯和二甲苯的影响 ,并初步探讨了有机膨润土与有机物间的作用机理。实验结果表明 ,改性剂用量是影响有机膨润土对有机物吸附性能的主要因素 ;改性剂用量相同时 ,钠化土的吸附效果明显好于直接改性的6 .0 %土 ,而热活化和酸活化对于有机膨润土吸附不同的有机物时影响程度也不同。应用有机膨润土建造垃圾填埋场防渗衬层具有一定的可行性。
Organobentonite was synthesized by placing cetyltrimethylammonium bromide (CTMAB) surfactants into montmorillonite layer in bentonite. The factors affecting the capacity of organobentonite for adsorbing such organic contaminants as phenol, aniline, benzene, toluene and xylene from refuse percolate were investigated, and the laws governing the adsorption of organic contaminants are summarized. It is shown that the key factor affecting the adsorption of organic contaminants by organobentonite is the amount of the modification reagent. When the amount of modification reagent is identical, the ability of organobentonite with Na is obviously better than that of 6% directly-modified organobentonite, and the influence of organobentonite prepared by heat treatment on adsorbing organic contaminants is different from that prepared by acid treatment. The organobentonite can be used to build liner of landfill.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2001年第4期455-460,共6页
Acta Petrologica et Mineralogica
基金
中国地质调查局资助课题 (DK990 2 0 0 7)
