典型多环芳烃电化学可逆增溶作用研究  

Electrochemically reversible solubilizayion of typical polycyclic aromatic hydrocarbons by a ferrocenyl surfacanat and its application

作　　者：田森林[1] 牛艳华[1] 李光[1] 杨志[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《上海师范大学学报（自然科学版）》2011年第6期557-561,共5页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家自然科学基金项目(20607008;21077048)

摘　　要：提出采用具有电化学开关特性的季铵盐实现对典型多环芳烃(PAHs)的可逆增溶,研究了十一烷基二茂铁三甲基溴化铵(FTMA)的电化学可逆特性及其对菲、芘、苊的增溶作用.结果表明:FTMA具有良好的电化学可逆特性,通过电化学氧化及还原作用,其在氧化态与还原态之间的转化效率可达到90%以上,临界胶束浓度(CMC)及表面张力在2种状态时也发生了极大变化;FTMA对菲、芘、苊具有显著的增溶作用,且增溶作用大小顺序为芘>菲>苊;经电化学氧化之后FTMA失去表面活性及增溶能力,FTMA对3种PAHs的摩尔增溶比均降低了85%以上,但经电化学还原之后其增溶能力仍可恢复.In this paper, the reversible surfactant solubilization of typical PAHs method was raised. Electrochemical reversible characteristics of cationic surfactant （ 11 - Ferrocenylundecyl） trimethylammonium bromide （ hereinafter referred to FTMA） and its water solubility enhancements of pyrene, phenanthrene and acenaphthene were determined. The results showed that FTMA pos- sessed well reversible characteristic, which realized reversibility between reduction and oxidation freely, and the conversion effi- ciency between FTMA and FTMA＋ were more than 90%. The critical micellar concentration （CMC） and the surface tension val- ues also significant changed because the micelles were disassembled into monomers after they were oxidized. The solubility of se- lected PAHs in water was greatly enhancement by FTMA,and the solubility can be ranked as follow：pyrene 〉 pherantherene 〉 acenaphthene. In addition, the apparent water solubilities of each PAHs by FTMA＋ were also determined. The result indicate that solubilization capacity of FTMA for PAHs was much higher than those in FTMA＋. The values of molar solubilization ratio（MSR） for FTMA＋ were reduced of 85 % compared with FTMA. Furthermore, these changes were reversible and electrochemically controlled.

关 键 词：二茂铁表面活性剂 可逆增溶 多环芳烃 增效修复 

分 类 号：O652.1[理学—分析化学]