Effect of synthetic surfactants on the solubilization and distribution of PAHs in water/soil-water systems
Effect of synthetic surfactants on the solubilization and distribution of PAHs in water/soil-water systems
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DOI：
10.1080/09593332708618695
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发表时间：
2006-08-01
影响因子：
2.8
通讯作者：
Wong, J. W. C.
中科院分区：
文献类型：
--
作者：
Cheng, K. Y.;Wong, J. W. C.
研究了非离子表面活性剂Tween 80、Triton X-100和Brij 35以及阴离子表面活性剂SDS对菲（Phe）和芘（Pyr）在土壤-水体系中的增溶和分布的影响。当表面活性剂浓度超过其临界胶束浓度（CMC）时，4种表面活性剂均能线性增溶Phe和Pyr。摩尔增溶比（MSR）表明表面活性剂对苯丙氨酸和吡啶的增溶能力，吐温80对这两种多环芳烃的增溶能力最强，SDS对这两种多环芳烃的增溶能力最弱，而Triton X-100和Brij 35对这两种多环芳烃的增溶能力基本相同。此外，所有的表面活性剂可以提供一个强大的胶束分配相的疏水性比苯丙氨酸Pyr揭示了他们的高胶束-水相分配系数，K-mc。批式解吸研究还表明，吐温80具有最好的解吸能力的Phe和Pyr在土壤-水系统中，其次是Triton X-100和Brij 35，而SDS似乎没有积极的影响，可能是由于其相对较高的CMC值的多环芳烃的解吸。因此，从应用的角度来看，吐温80是四种表面活性剂中最合适的一种，它可以提高土壤-水系统中多环芳烃的增溶和解吸能力，这是多环芳烃污染土壤生物修复技术成功的前提条件。
The present study examined the effects of four surfactants, including three non-ionic surfactants (Tween 80, Triton X-100 and Brij 35) and an anionic surfactant SDS on the solubilization and distribution of phenanthrene (Phe) and pyrene (Pyr) in soilwater systems. All four surfactants could enhance the solubilization of Phe and Pyr in aqueous phase linearly when surfactant concentrations exceeded their respective critical micelle concentrations (CMC). Molar solubilization ratio (MSR) which indicated surfactant's solubilization capacity for Phe and Pyr, was highest for Tween 80 for both PAHs, and SDS had the lowest among the four surfactants, while Triton X-100 and Brij 35 had about the same MSR for both PAHs. Moreover, all the surfactants could provide a strong micelle partitioning phase for the more hydrophobic Pyr than Phe as revealed by their high micelle-aqueous phase partition coefficient, K-mc. Batch desorption studies also demonstrated that Tween 80 had the best capacity for the desorption of both Phe and Pyr in the soil-water systems, and followed by Triton X-100 and Brij 35, while SDS seems to have no positive effect on the desorption of PAHs probably due to its relatively high CMC value. Therefore, from the application standpoint, the results obtained in this study suggest that Tween 80 would be the most suitable candidate among the four surfactants in improving solubilization and desorption of PAHs in soil-water system, which are believed to be the prerequisites for successful bioremediation technology for PAH contaminated soil.