摘要
以阴离子表面活性剂十二烷基苯磺酸钠 (LAS)对采油区土壤 (MGP)中PAHs的淋洗效果进行研究 .结果表明 ,5CMC (临界胶束浓度 )LAS促进了土柱中PAHs的迁移渗透 ,土柱中PAHs的淋溶率较低 ,而且仅土柱上层 5cm的土样中PAHs发生了较为明显的淋溶 .与Br-离子穿透曲线相比 ,土柱中PAHs的淋溶均有滞后现象 ,而且随着环数的增加 ,PAHs的淋溶滞后现象愈加明显 .PAHs的迁移渗滤性与其辛醇 /水分配系数之间具有显著负相关性 ,说明随着辛醇 /水分配系数的增加 。
The effectsof anionic surfactant LAS on the transport of PAHs from oil-contaminated soil was studied. Results showed that 5 critical micelle concentration (CMC) LAS enhanced the transportabilityof PAHs. The leaching rate of PAHs was low,and transport was observed only in the top layer 5cm. The transport of PAHs was retarded compared withBr -breakthrough curve, and more significant retardation was observed for high ring PAHs. Linear correlation was observed between the relative leachability of the individual PAHs and the octanol/water coefficient of PAHs.
出处
《环境化学》
CAS
CSCD
北大核心
2005年第1期12-16,共5页
Environmental Chemistry
基金
国家重点基础研究专项基金 ( 2 0 0 3CB415 0 0 4)
国家自然科学基金 ( 4 0 3 3 2 0 15
40 3 7110 5 )资助项目
