Zhu L Z, Chiou C T
Department of Environmental Science, Zhejiang University, Hangzhou 310028, China.
J Environ Sci (China). 2001 Oct;13(4):491-6.
Water solubility enhancements of pyrene by both single-surfactant and mixed-surfactant solutions were compared and evaluated. The solubility of pyrene in water was greatly enhanced by each of Triton X-100 (TX100), Triton X-405 (TX405), Brij 35 and SDS, in which the water solubility enhancements increased with increasing surfactant concentrations. The extent of solubility enhancements at surfactant concentrations below the CMC is the order of TX100 > Brij 35 > TX405 > SDS; the sequence at surfactant concentrations above the CMC is TX100 > Brij 35 > SDS > TX405. Pyrene was solubilized synergistically by anionic-nonionic mixed surfactant solutions, especially at low surfactant concentrations. The synergistic power of the mixed surfactants is SDS-TX405 > SDS-Brij 35 > SDS-TX100. The synergism as noted is attributed to increasing Kmc is and/or decreasing the CMC of the mixed surfactant solution. For SDS-TX405 and SDS-Brij 35 mixed surfactant solutions, an increase in Kmc is coupled with a decrease in the CMC; for SDS-TX100, only a decreased in the CMC value is noted. Mixed-surfactant solutions may improve the performance of the surfactant-enhanced remediation (SER) of soils by increasing the bioavailability and biodegradation of non-aqueous-phase organic pollutants and reducing the level of surfactant pollution and remediation expenses.
比较并评估了单表面活性剂溶液和混合表面活性剂溶液对芘的水溶性增强作用。芘在水中的溶解度被Triton X - 100（TX100）、Triton X - 405（TX405）、Brij 35和十二烷基硫酸钠（SDS）中的每一种显著提高，其中水溶性增强随着表面活性剂浓度的增加而增加。在表面活性剂浓度低于临界胶束浓度（CMC）时，水溶性增强程度的顺序为TX100 > Brij 35 > TX405 > SDS；在表面活性剂浓度高于CMC时，顺序为TX100 > Brij 35 > SDS > TX405。芘通过阴离子 - 非离子混合表面活性剂溶液协同增溶，特别是在低表面活性剂浓度下。混合表面活性剂的协同能力为SDS - TX405 > SDS - Brij 35 > SDS - TX100。所观察到的协同作用归因于混合表面活性剂溶液的Kmc增加和/或CMC降低。对于SDS - TX405和SDS - Brij 35混合表面活性剂溶液，Kmc增加与CMC降低相关联；对于SDS - TX100，仅观察到CMC值降低。混合表面活性剂溶液可以通过提高非水相有机污染物的生物可利用性和生物降解性以及降低表面活性剂污染水平和修复费用来改善土壤表面活性剂增强修复（SER）的性能。
