摘要
以阳离子表面活性剂十六烷基三甲基铵离子 ( HDTMA)和四甲基铵离子 ( TMA)对土壤进行修饰 ,制得改性土壤。探讨了改性土壤对苯系物的适宜吸附条件 ,研究了它们对水中苯系物的吸附作用及相互影响行为及对苯系物的吸附性能及机理。结果表明 :HDTMA改性土壤可有效地吸附水中的污染物 ,吸附系数是原土的几十倍 ,对苯系物的吸附等温线呈近似线性 ,其机理为分配作用 ,被吸附物相对分子质量越大吸附愈大 ;TMA改性土壤对水中苯系物的吸附效果较前者差 ,但仍比原土壤好 ,对苯系物的吸附等温线呈非线性 ,主要以表面吸附为主。
Modifying black soils with quaternary ammonium compounds (QACs) hexadecyltrimethyl ammonium (HDTMA) and tetramethylammonium (TMA) has been done. The sorption of benzene homologues by these soils has been studied. HDTMA modified soils have good sorption effects to benzene homologue. TMA modified soils did not have better effects than HDTMA modified soils. and more than natural soil. The sorption of benzene homologue was relative to the properties of organic compound. The sorption isotherm of benzene homologue was linear, which is the result of benzene homologue partition into HDTMA. The sorption isotherm of benzene homologue was non-linear, which is the result of benzene homologue partition into TMA.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第4期300-302,共3页
Journal of Northwest University（Natural Science Edition）
基金
西北大学校内基金资助项目 (99NW5 0 )
