生物表面活性剂胆酸钠对氯酚的增溶

发布时间：2018-05-16 13:24

本文选题：生物表面活性剂 + 胆酸钠　；参考：《环境化学》2017年02期

【摘要】：胆酸钠是一种重要的生物表面活性剂,目前的研究主要集中在利胆药物研制方面,而有关其在增溶修复有机污染方面的应用研究较少.本文考察了胆酸钠(Na C)、脱氧胆酸钠(Na DC)、十二烷基硫酸钠(SDS)、曲拉通(TX-100)和十六烷基三甲基溴化铵(CTAB)对2,4,6-三氯苯酚(2,4,6-TCP)和2,4-二氯苯酚(2,4-DCP)的增溶作用,并探究了底物结构、温度和无机离子对Na C增溶氯酚的性能的影响.实验结果表明,当表面活性剂浓度大于临界胶束浓度(CMC)时,2,4,6-TCP和2,4-DCP的表观溶解度与表面活性剂浓度具有良好的线性关系.其中,相比于其它表面活性剂,当浓度高于0.05 mol·L-1时,Na C具有更良好的增溶性能.随苯环上氯原子个数从0增加到3,Na C的摩尔增溶比(MSR)值随氯酚疏水性(Kow)的增大而线性减小,Na C的胶束-水分配系数(Kmc)值则线性增大.在288—308 K的温度范围内,Na C增溶氯酚的性能逐渐增强.4种无机盐KCl、Na Cl、Na2SO4、Ca Cl2对Na C增溶2,4,6-TCP和2,4-DCP的影响不同.随着无机盐浓度的升高,Na C增溶2,4,6-TCP的能力先上升后下降,而增溶2,4-DCP的能力则迅速下降.
[Abstract]:Sodium cholate is an important biosurfactant. At present, the research is mainly focused on the development of choledochomycin, but the application of sodium cholate in solubilization and remediation of organic pollution is less. The solubilization of sodium cholate, sodium deoxycholate, sodium dodecyl sulfate, trimethylammonium bromide (TX-100) and cetyltrimethylammonium bromide (CTAB) for 2H4 (4) -trichlorophenol (2) and (2 (4) -dichlorophenol) (24-DCPs) were investigated, and the structure of the substrate was investigated. Effects of temperature and inorganic ions on the properties of Na C solubilized chlorophenols. The experimental results show that when the surfactant concentration is greater than the critical micelle concentration (CMC), there is a good linear relationship between the apparent solubility and the surfactant concentration. Compared with other surfactants, NOC has a better solubilization performance when the concentration is higher than 0. 05 mol L-1. With the increase of the number of chlorine atoms in benzene ring from 0 to the molar solubilization ratio (MSRs) of 3NOC, the micelle water partition coefficient (KMC) increases linearly with the increase of hydrophobicity of chlorophenol. In the temperature range of 288-308 K, the properties of Na C solubilized chlorophenol increased gradually. The effects of Na ClO Na 2SO 4 Na 2SO 4 Ca Cl2 on Na C solubilization 2N 4N 6-TCP and 24-DCP were different. With the increase of inorganic salt concentration, the ability of Na C to solubilize 2o 4N 6-TCP increased first and then decreased, while the ability of solubilizing 2na-DCP decreased rapidly.
【作者单位】：武汉大学资源与环境科学学院;武汉大学生物质资源化学与环境生物技术湖北省重点实验室;
【基金】：教育部新世纪优秀人才支持计划(NCET-12-0429) 武汉市应用基础研究计划项目(201406010101010063)资助~~
【分类号】：X505

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