Partitioning of polycyclic aromatic hydrocarbons to solid-sorbed nonionic surfactants
Partitioning of polycyclic aromatic hydrocarbons to solid-sorbed nonionic surfactants
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DOI：
10.1016/j.envpol.2007.05.001
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发表时间：
2008-03-01
影响因子：
8.9
通讯作者：
Zhou, Wenjun
中科院分区：
文献类型：
--
作者：
Zhu, Lizhong;Zhou, Wenjun
疏水有机物在固体表面活性剂中的分配对于描述和预测疏水有机物在固体-水-表面活性剂体系中的分布具有重要作用。实验结果表明，多环芳烃（PAHs）在固体表面活性剂中的分配系数（K-sm）随表面活性剂吸附量的增加而增大，在表面活性剂吸附饱和时达到最大值，此时固体表面完全被表面胶束（或附胶束）覆盖.结果表明，多环芳烃在不同表面活性剂体系中的K-sm（m）与相应的分配系数（K-mc）具有良好的线性关系，并建立了多环芳烃在固体-水-表面活性剂体系中的分配模型.这些结果对于开发有效和安全的表面活性剂强化修复技术具有实际意义。(c)2007爱思唯尔有限公司保留所有权利。
The partition of hydrophobic organic compounds (HOCs) into solid-sorbed surfactant has a crucial role in describing and predicting the distribution of HOCs in solid-water-surfactant systems. The experimental results of this study indicated that the partition coefficients of polycyclic aromatic hydrocarbons (PAHs) into the solid-sorbed surfactant (K-sm) increased with an increase in the sorption amount of surfactants onto solid and reached a stable maximum value (K-sm(m)) at the sorption of surfactants in saturation state, at which the solid surface was completely covered with the surface micelle (or admicelle). The fitted K-sm(m) values for PAHs with different surfactants were found to have a good linear relationship with the corresponding partition coefficient of PAHs to surfactant micelles in solution (K-mc), and then a model was developed to describe and predict the distribution of PAHs in solid-water-surfactant systems. These results are of practical interest for developing effective and safe surfactant-enhanced remediation technologies. (c) 2007 Elsevier Ltd. All rights reserved.