复配表面活性剂APG/SDBS对菲、芘的增溶特性

Dissolution characteristics of phenanthrene and pyrene in complex surfactant system

研究了烷基糖苷(Alkyl Polyglycoside,APG)和十二烷基苯磺酸钠(Sodium Dodecyl Benzene Sulfonate,SDBS)混合体系的不同复配比α(α=C_(SDBS)/C_总)、pH和温度(T)对菲和芘的溶解行为的影响.结果表明,当α=0.4时,复配体系具有最小的表面张力(γ)和临界胶束浓度(Critical Micelle Concentration,CMC),且菲、芘的表观溶解度(Sw)、增溶倍数(Sw/S*,S*为菲或芘在纯水中的溶解度)和摩尔增溶比(Molar Solubilization Ratio,MSR)均达到最大值.菲、芘的Sw随pH增加先增加后缓慢降低,pH=9时达到最大.随温度的升高,菲、芘的Sw逐渐增加,当T≥40℃时,增加变缓;因此,该复配体系的最佳反应条件为α=0.4、T=40℃、pH=9.本研究可为多环芳烃(PAHs)污染土壤的淋洗修复提供科学依据.

In this study,the dissolution behaviors of phenanthrene and pyrene in solution were investigated with different proportion（ α） of Alkyl Polyglycoside（ APG） and Sodium Dodecyl Benzene Sulfonate（ SDBS）,pH values and temperature. It was found that when α is 0. 4,the suspension developed lowest surface tension（ γ） and critical micelle concentration value（ CMC）. And the apparent solubility（ Sw）,Solubilization multiple（ Sw/S＊,S＊represents the solubility of phenanthrene or fluorene in pure water） and Molar Solubilization Ratio（ MSR） of phenanthrene and pyrene were all maximal. The Swvalues of phenanthrene and pyrene increase first,then decrease gradually with pH increasing. The maximum value appears as pH = 9. The Swof phenanthrene and pyrene increases sharply with temperature increasing,and when T ≥ 40 ℃,it increases gradually. The optimum reaction conditions is α 0.4,T = 40 ℃ and pH = 9. This study is intended to provide a scientific basis for the leaching and remediation of PAHs polluted soil.