新型ED3A螯合性表面活性剂洗脱修复重金属/多环芳烃复合污染土壤的研究
Washing Remediation of Heavy Metal/Polycyclic Aromatic Hydrocarbons Contaminated Soil with a Novel ED3A Chelating Surfactant
摘要:
研究了以螯合型表面活性剂C12-ED3A3Na为洗脱剂去除锌/菲复合污染土壤菲的去除效果,结果表明C12-ED3A3Na浓度为6000 mg/L、洗脱剂pH值为11.72、水土比为20:1、洗脱时间为4 h和洗脱温度为25℃时,可达到最佳洗脱效果;在此洗脱条件下菲的去除率达到85.44%;此去除率远远高于AEO-10和SDS为洗脱剂的菲的去除率,说明表面活性剂C12-ED3A3Na适合用于重金属/多环芳烃复合污染土壤的修复。
Abstract:
The elution effect of phenanthrene in zinc/phenanthrene contaminated soil with a novel chelating surfactant C12-ED3A3Na was investigated. The results showed that C12-ED3A3Na solution could obtain the optimal phenanthrene removal effect when its concentration was 6000 mg/L, its pH was 11.72, the liquid-soil ratio was 20:1, the elution time was 4 h, and the elution temperature was 25˚C. Under these elution conditions, the removal efficiency of phenanthrene was 85.44%. This removal efficiency is much higher than that of AEO-10 and SDS as eluant, indicating that the surfactant C12-ED3A3Na is suitable for the remediation of heavy metal/polycyclic aromatic hydrocarbons contaminated soil.
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