新型ED3A类螯合性表面活性剂淋洗修复重金属污染土壤的研究
Leaching Remediation of Heavy Metal Contaminated Soil with a Novel Ethylenediamine Triacetate Chelating Surfactant
DOI: 10.12677/AEP.2018.81003, PDF,  被引量    科研立项经费支持
作者: 彭忠利*, 陈鸿雁：惠州学院化学与材料工程学院，广东 惠州
关键词: 乙二胺三乙酸盐；螯合性表面活性剂；重金属；土壤修复；淋洗；Ethylenediamine Triacetate； Chelating Surfactant； Heavy Metal； Soil Remediation； Leaching
摘要: 研究了新型乙二胺三乙酸盐(ED3A)类螯合性表面活性剂N-(3-十二烷氧基-2-羟基丙基)乙二胺三乙酸钠(C12-ED3A3Na)淋洗修复重金属污染农田土壤的淋洗效果。结果表明，C12-ED3A3Na在浓度为0.05 mol/L，pH值为11.48，淋洗时间为8 h时，可达到最佳淋洗效果；在最佳淋洗条件下C12-ED3A3Na溶液对土壤中Pb、Cu和Zn的去除率分别达到37.12%、32.60%和19.77%；C12-ED3A3Na不仅能有效去除土壤中可交换态、碳酸盐结合态和铁锰氧化态的Pb、Cu和Zn，对有机态的和残渣态的Pb、Cu和Zn也有一定去除作用。
Abstract: The leaching effect of heavy metal contaminated farmland soil by a novel ethylenediamine triace-tate (ED3A) chelating surfactant sodium N-(3-dodecyloxy-2-hydroxypropyl) ethylenediamine tri-acetate (C12-ED3A3Na) was investigated. The results showed that C12-ED3A3Na solution could obtain the optimal heavy metal removal effect when its concentration was 0.1 mol/L, its pH was 11.48, the leaching time was 8 h, and the leaching temperature was 35˚C. Under these leaching conditions, its removal efficiency was 37.12% for Pb, 32.60% for Cu and 19.77% for Zn, respectively. The chelating surfactant could effectively remove the metals in the exchangeable, carbonates-bound and Fe/Mn oxides of low crystallinity fractions in the soil, and also had a certain metal removal effect on their organic-bound and residual fractions.
文章引用：彭忠利, 陈鸿雁. 新型ED3A类螯合性表面活性剂淋洗修复重金属污染土壤的研究[J]. 环境保护前沿, 2018, 8(1): 19-28. https://doi.org/10.12677/AEP.2018.81003

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