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电化学  2013 

粘性土壤中苯酚的电动力学迁移研究

, PP. 336-340

Keywords: 电动力学,苯酚,土壤修复,粘土

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Abstract:

采用电动力学技术修复苯酚污染的粘性土壤,研究了苯酚的吸附特性,以及粘土中苯酚的最佳萃取剂和萃取条件,并讨论了不同pH、含水率、电场强度及不同添加物条件下苯酚的迁移特性.实验得出,苯酚的吸附符合Freundlich等温式,最大吸附量362mg·kg-1;用三氯甲烷做萃取剂,超声波20min加恒温震荡30min,从土壤中提取苯酚,萃取率可达到94.3%;土壤电动力学过程中苯酚向阳极迁移并在距离阳极0~6cm处富集.在pH值8.16,含水率为40%,电场强度为2V·cm-1条件下,阳极添加0.1mol·L-1NaOH溶液,并向阴极添加0.05mol·L-1LAS溶液,苯酚的迁移效果达到最佳,在距阳极0cm和6cm处苯酚富集倍数分别达到139.0%和133.7%.

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