原位钝化修复技术在重金属污染土壤中的可行性探究

The Feasibility of in-situ Passivation Technique in Heavy Metal Contaminated Soil

指出了原位钝化修复技术能够满足我国土壤轻微、轻度重金属污染的治理要求,在以硝酸-高锰酸钾改性纳米碳黑(OBC)为钝化材料的盆栽试验中,其结果表明改性纳米碳黑可以降低土壤中重金属Cd2+的有效态,并且与植物一起促进钝化效果,从而验证了该技术的实际可行性。然而,钝化稳定性的研究是目前所欠缺的,尤其是钝化的长期稳定性研究,因此,对此展开了讨论。

In situ immobilization of heavy metals coud satisfy the governance requirements of slight and mild contaminated soil by heavy metals. In the pot experiment with the nano black carbon which was modified by nitric acid and potassium permanganate, the result showed that the modified nano black carbon could reduce the effective state Cd2＋ , and improve the immobilization effect with plants. However, there was lack of research of the stability of the immobilization, especially lack of the long-term research. Therefore, this article would discuss that.