摘要
研究了苯酚、苯胺、对硝基苯酚等极性或可离子化有机物在水 /有机膨润土界面的化学行为 ,定量描述了表面吸附和分配作用对双阳离子有机膨润土吸附作用的相对贡献率及影响因素 .结果表明 ,表面吸附和分配作用的相对贡献率大小与改性时加入的双阳离子表面活性剂的组成与配比有关 .双阳离子有机膨润土 4 0TMAB/6 0DTAB和 4 0TMAB/ 2 0OTMAB对苯酚的吸附 ,在低浓度时以表面吸附为主 ,在高浓度时以分配作用为主 .
A series of dual-cation organobentonites are synthesized by replacing the metal ions in bentonite with both long-chain alkyl or aryl quaternary ammonium cations,such as dodecyltrimethylammonium(DTMA),tetradecyltrimethylammonium(TPA),cetyltrimethylammonium(CTMA),octadecyltrimethylammonium(OTMA),and short-chain alkyl or aryl quaternary ammonium cations,such as tetramethylammonium(TMA).Sorption of p-nitrophenol,phenol,and aniline from water to dual-cation organobentonites are investigated.The separate contributions of adsorption and partition to the total sorption of organic compounds to dual-cation organobentonites are analyzed mathematically,the relative effects being a function of the equilibrium concentrations of the organic compounds.The changing rules of dual-cation organobentonites contribution to partition and adsorption are deeply discussed.
出处
《环境化学》
CAS
CSCD
北大核心
2002年第3期240-244,共5页
Environmental Chemistry
基金
国家自然科学基金 ( 2 97770 0 5 )
浙江省自然科学基金青年科技人才培养专项资金 (RC990 32 )
