土壤酚类污染物在电动力学作用下的迁移及其机理

通过小型实验研究并比较了土壤中苯酚和2,4-二氯酚在均匀和非均匀电动力学作用下的迁移特征和机理,分析了利用电动力学技术修复酚类污染土壤的可行性.结果表明,电动力学过程能有效地促进土壤中苯酚及2,4-二氯酚的解吸附和迁移,电渗析和电迁移是其主要的作用机理,其迁移效果与电动力学形式、污染物类型、土壤酸碱性质和电极反应等密切相关,可以采用适当的电动力学工艺修复含酚类化合物的污染土壤.

The migration and its mechanism of phenolic contaminants in soil by electrokinetics

The characteristic of migration and its mechanism of phenol and 2,4-dichlorophenol in soil by uniform and non-uniform electrokinetics were tested through bench-scale experiments, and the feasibility of using electrokinetic technique for remediation of phenolic compounds contaminated soils was analyzed as well. Electrokinetic transport process could promote effectively the desorption and migration of phenol and 2,4-dichlorophenol in soil; electromigration and electroosmosis were the main mechanisms; and the migration effect was related closely to the mode of electrokinetics, the type of contaminants, the soil acid-basic properties, and the electrolysis of pore fluids on electrodes. Appropriate electrokinetic process could be adopted to remediate phenolic compounds contaminated soils.