专论
朱利中,冯少良.混合表面活性剂对多环芳烃的增溶作用及机理[J].环境科学学报,2002,22(6):774-778
混合表面活性剂对多环芳烃的增溶作用及机理
- Water solubility enhancement of polycyclic aromatic hydrocarbons by mixed surfactant solutions
- 基金项目：国家杰出青年科学基金(编号:20125719);国家自然科学基金(编号:20077025)资助课题
- 作者
- 单位
- 朱利中
- 浙江大学环境科学系, 杭州 310028
- 冯少良
- 浙江大学环境科学系, 杭州 310028
- 摘要：比较研究了单一和混合表面活性剂对萘、苊、蒽、菲、芘的增溶作用及其机理.混合表面活性剂单一表面活性对多环芳烃协同增溶增溶作用的大小与水溶液中表面活性剂的结构、浓度、组成及有机溶质本身的性质有关.在临界胶束浓度(CMC)以上, 单一表面活性剂对多环芳烃的增溶作用顺序为TritonX10.0>Brij35>TritonX30.5, 与其亲水亲油平衡值(HLB)呈负相关;混合表面活性剂对多环芳烃能产生显著的增溶作用, 其协同增溶作用顺序为SDSTritonX30.5>SDSBrij35>SDSTritonX10.0, 协同增溶作用的大小与其中的非离子表面活性剂的HLB值及多环芳烃的辛醇水分配系数呈正相关.混合表面活性剂溶液的CMC值降低、溶质在胶束相水相间分配系数Kmc的增大是产生协同增溶作用的主要原因.
- Abstract：Water solubility enhancements of naphthalene, acenaphthylene, anthracene, phenanthrene and pyrene in micellar solutions of single surfactant and binary mixed surfactant were studied. The solubilization is relative to the structure and concentrations of surfactants the solution as well as properties of organic solutes. The sequence of water solubility enhancements at surfactant concentrations above the critical micelle concentration (CMC) is TritonX100 > Brij 35 > TritonX305, negatively correlates to the hydrophile lipophile balance (HLB) of surfactant. PAHs are synergistically solubilized by mixed anionic nonionic surfactant solutions. The synergistic power of the mixed surfactants for PAHs is SDS TX305 > SDS Brij35 > SDS TX100, appears to be positively relative to HLB of nonionic surfactants and the K ow of PAHs.The synergism noted for the mixed surfactants is attributed to the CMC decrease of the surfactant solution and the increase of partition coefficient (K/mc) of solute between micelle and aqueous phase.
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