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环境化学  2015 

正己烷萃取去除模拟阴-非混合表面活性剂土壤淋洗液中的重非水相液体

Keywords: 正己烷,萃取,阴-非混合表面活性剂,重非水相液体

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Abstract:

研究了利用正己烷液-液萃取去除阴-非混合表面活性剂土壤淋洗液中的重非水相液体(DNAPLs)的可行性及表面活性剂浓度、溶剂/水比例和无机盐等因素对去除率的影响.结果表明,利用正己烷作为溶剂可使氯苯(CB)从不同配比的十二烷基硫酸钠(SDS)和失水山梨聚氧乙烯醇醚(Tween80)的混合表面活性剂(31,11,13)溶液中有效的去除,去除率分别达87.2%—96.9%,94.4%—97.0%和95.9%—98.5%,表面活性剂浓度对去除效果没有显著影响;溶剂/水的比例增大,去除率增大,实验中选择油水比为110;无机盐的存在可提高阴-非混合表面活性剂的增溶效果,但对去除效果没有影响.

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