隔离带和表面活性剂对电动修复氯苯污染土壤的影响

Effects of isolation zone and surfactant on electrokinetic remediation of chlorobenzene-contaminated soils

报道土壤中氯苯在电场驱动下的迁移特征,研究了隔离带和表面活性剂Tween80对氯苯迁移的影响。结果表明,在电场驱动下,氯苯向阴极区移动。在阳极区与阴极区之间设置一个水相隔离带,阳极区氯苯的修复率由原来的31%显著提高到58%。在污染土壤中增加表面活性剂Tween80,阳极区氯苯的修复率又提高到72.2%。因此,设置隔离带并添加表面活性剂有利于增强氯苯的修复率。

The migration of chlorobenzene driven by electrokinetics in soil was investigated, and the effects of the isolation zone and surfactant Tween 80 on the removal efficiency of ehlorobenzene were evaluated. The results showed that the chlorobenzene migrated toward the cathodic zone. The isolation zone between anodic zone and cathodic zone led to a remarkable increase of removal efficiency for the chlorobenzene remediation from 31% to 58%. When adding Tween 80 in soil, the removal efficiency for the remediation of chlorobenzene in the anodic zone soil approached to 72.2%. Therefore, the isolation zone and addition of surfactant could improve the remedi- ation of chlorobenzene in soil.