阴-阳离子有机膨润土吸附水中苊的性能及机理研究

用溴化十二烷基三甲铵（DTMAB）、十二烷基硫酸钠（SDS）、十二烷基苯磺酸钠（SDBS）按不同配比制得一系列阴一阳离子有机膨润土，研究了有机膨润土吸附水中苊的性能及机理。结果表明，阴一阳离子有机膨润土对水中苊的吸附去除能力大于单阳离子有机膨润土，且与改性时所用阴离子表面活性剂的种类、浓度有关；阴一阳离子有机膨润土对苊的吸附等温线呈线性，吸附机理主要是分配作用。

Sorption properties and mechanisms of acenaphthene to bentonites modified by anion and cation surfactants from water

A series of anion-cation organobentonites are synthesized from bentonite by exchanging with the mixtures of an anion surfactant, sodium dodecyl sulfate(SDS) or sodium dodecyl benzene sulphonate (SDBS), and a cation surfactant, dodecyltrimethylammonium bromide (DTMAB). The sorption properties and mechanisms of acenaphthene to these organobentonites from water were investigated. It is indicated that the sorption of acenaphthene to anion-cation organobentonites is higher than that to respective cation organobentonite and limited by the concentrations/kinds of anion surfactants. Linear isotherms of acenaphthene to anion-cation organobentonites imply that partition is primary the sorption mechanisms.