环糊精与表面活性剂增效电动力学法修复石油污染土壤

The β-cyclodextrin and Surfactant Enhance Electrokinetic Remediation of Oil-contaminated Soils

针对石油污染土壤因石油成分复杂且在水相中溶解度低而难以修复问题,采用了表面活性剂和环糊精增效电动力学修复技术,研究了十二烷基苯磺酸钠表面活性剂和β-环糊精单独添加及联合添加时对电动力学修复石油污染土壤的影响,分析了表面活性剂和环糊精增效电动力学作用下土壤中污染石油的迁移机理。结果表明:在电动力学效应中,电渗析作用是石油污染物迁移的主要动力,石油去除率达到45%以上。十二烷基苯磺酸钠和β-环糊精都可以增加石油的溶解性,提高石油的迁移。但是二者各有优缺点,二者的混合液作为石油的增溶剂是最佳选择,使电动力学作用下土壤去油率最高达85.2%。

Oil has a complex composition and low solubility in the aqueous phase. Therefore,it is more difficult to repair the soil after contaminated. The technology which electrokinetic remediation enhanced by the surfactant and β-cyclodextrin is to solve this problem. The influence of electrodynamics repair of petroleum contaminated soil by adding the surfactant sodium dodecyl benzene sulfonic acid and β-cyclodextrin individually and simultaneously is studied and migration mechanism of oil in soil under electrokinetic remediation enhanced by the surfactant andβ-cyclodextrin is analyzed. The results show that the electrodialysis is the main driver of oil migration in electrodynamics effect and the results are obvious,in which the rate of removal oil have reached more than 45%. Sodium dodecyl benzene sulfonate and β-cyclodextrin can increase the solubility of the oil and the oil migration. But both have advantages and disadvantages,a mixture of both as a oil solubilizing agent is the best choice and the result is up to 85. 2%.