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化工进展  2015 

不同溶液对地下水中甲基叔丁基醚溶解过程影响

DOI: 10.16085/j.issn.1000-6613.2015.10.043

Keywords: 甲基叔丁基醚,溶液,表面活性剂,助溶剂,溶解

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Abstract:

采用实验室小型二维砂箱对地下水流动过程中甲基叔丁基醚(MTBE)溶解过程进行模拟实验,主要考察了非离子型表面活性剂聚乙氧基油酸山梨糖醇(Tween80)、阴离子表面活性剂十二烷基苯磺酸钠(SDBS)与助溶剂乙醇对MTBE溶解过程的影响。结果表明,Tween80在其临界胶束浓度(CMC)以上能够对MTBE起到增溶的效果而且在所研究浓度范围存在最佳增溶浓度10g/L;低于临界胶束浓度条件下的SDBS并没有增强MTBE迁移反而会延缓MTBE的溶解;乙醇可以增大MTBE的溶出浓度,而且随着含量提高增溶效果加强。通过比较各种条件下最佳的MTBE累积去除率可以得出,当MTBE去除率达到80%之前,对MTBE溶解增强效果由大到小顺序依次为非离子型表面活性剂Tween80>助溶剂乙醇>水>阴离子表面活性剂SDBS;而去除率80%以后,增溶效果的顺序则为乙醇>Tween80>水>SDBS。

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