Solubilization of polycyclic aromatic hydrocarbon mixtures in micellar nonionic surfactant solutions
Solubilization of polycyclic aromatic hydrocarbon mixtures in micellar nonionic surfactant solutions
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DOI：
10.1016/s0043-1354(02)00070-2
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发表时间：
2002-08-01
期刊：
影响因子：
12.8
通讯作者：
Pritchard, PH
中科院分区：
文献类型：
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作者：
Prak, DJL;Pritchard, PH
本研究旨在研究的多环芳烃（PAHs）的混合物的非离子表面活性剂：吐温20，吐温80，Triton X 100，Brij 35，和Brij 58的解决方案中的溶解。当芘（PYR），荧蒽（弗拉），菲（PHE）从两个PAH混合物中溶解，PAH浓度和摩尔增溶比偏离很小，从那些发现在单PAH系统。然而，当这些多环芳烃从三个多环芳烃混合物中溶解时，并非所有三个多环芳烃都达到了它们的单多环芳烃溶解度。当多环芳烃依次加入到表面活性剂溶液中时，最后加入的多环芳烃达到其单一多环芳烃的溶解度，而其他两种多环芳烃的浓度降低了14- 45%。当多环芳烃同时加入到表面活性剂溶液中时，固相的组成影响哪个PAH达到其单PAH溶解度。对于固体含有相等摩尔分数的所有三个多环芳烃，弗拉和PHE溶解在表面活性剂溶液中，在较小程度上比单PAH系统。在不含表面活性剂的类似体系中，仅弗拉溶解度降低。随着PAH在固相中的摩尔分数的增加，其在胶束相（和在水相中）的溶解度增加到溶解度极限。基于这些研究，在预测胶束表面活性剂溶液中多环芳烃混合物的浓度时，应同时考虑多环芳烃-多环芳烃相互作用和胶束-多环芳烃相互作用。这应该这样做，因为多环芳烃-多环芳烃相互作用可以影响水溶性，而胶束-多环芳烃相互作用可以影响多环芳烃在胶束相中的分布，这可能会随着混合物组成的变化而变化。出版社：Elsevier Science Ltd
This study sought to examine the solubilization of mixtures of the polycyclic aromatic hydrocarbons (PAHs) in solutions of the nonionic surfactants: Tween 20, Tween 80, Triton X 100, Brij 35, and Brij 58. When pyrene (PYR), fluoranthene (FLA), and phenanthrene (PHE) were solubilized from two-PAH mixtures, the PAH concentrations and molar solubilization ratios deviated very little from those as found in the single-PAH systems. When these PAHs were solubilized from the three-PAH mixtures, however, not all three PAHs reached their single-PAH solubilities. When the PAHs were added sequentially to surfactant solution, the PAH added last reached its single-PAH solubility, while the concentration of other two PAHs were lowered by 14-45%. When the PAHs were added simultaneously to the surfactant solution, the composition of the solid phase influenced which PAH reached its single-PAH solubility. For solids containing equal mole fractions of all three PAHs, FLA and PHE dissolved in surfactant solution to a lesser extent than the single-PAH systems. In similar systems containing no surfactant, only FLA solubility decreased. As the mole fraction of a PAH in the solid phase increased, its solubility in the micelle phase (and in the aqueous phase) increased up to the solubility limit. Based on these studies, both PAH-PAH interactions and micelle-PAH interactions should be taken into account when predicting the concentrations of PAH mixtures in micellar surfactant solutions. This should be done because PAH-PAH interactions can influence aqueous solubility, while micelle-PAH interactions can affect the distribution of PAHs in the micellar phase, which may change as the mixture composition changes. Published by Elsevier Science Ltd.