铬污染土壤的形态特征及药剂稳定化研究  

Study on the Speciation Characteristics and Chemical Stabilization of Chromium Contaminated Soil

作　　者：于慧鑫 张广鑫[2] 李杰 卢喜来 吴丹 YU Huixin;ZHANG Guangxin;LI Jie;LU Xilai;WU Dan(College of Environment and Safety Engineering,Shenyang University of Chemical Technology,Shenyang110142,China;Shenyang Academy of Environmental Sciences,Shenyang 110167,China)

机构地区：[1]沈阳化工大学环境与安全工程学院,辽宁沈阳110142 [2]沈阳环境科学研究院,辽宁沈阳110167

出　　处：《环境保护科学》2019年第1期116-121,共6页Environmental Protection Science

基　　金：辽宁省教育厅科学研究一般项目(L2015431)资助

摘　　要：基于典型污染场地中的铬污染土壤,以多种形态划分方法(Tessier法、BCR法、Maiz法)为体系,探讨了铬的污染特征以及多种形态划分方式的适用程度,并利用不同投加比例的FeSO_4、Na_2S、Na_2SO_3,以及复配药剂分别对铬污染土壤进行稳定化处理,通过土壤总铬及六价铬浸出浓度的测定,研究了药剂对铬污染土壤的短期(2 d,28 d)和长期(1 a)稳定化效果。结果表明,该土壤样品中,残渣态的铬含量最大,其次为铁锰氧化物结合态以及有机物和碳酸盐结合态,不同的提取方法虽然在划分形态方面的技术手段各不相同,但存在着一定的联系;3种药剂及复配剂型对污染土壤中的铬均有很好的稳定化效果,可以在短期内降低总铬和六价铬的浸出浓度,并在长期的稳定化过程中,进一步提高稳定效果并保持。Based on the chromium contaminated soil in typical contaminated sites in Shenyang,the pollution speciation analysis of chromium and the applicability of various types of soilsequential extractionprocedures(Tessier,BCR and Maizsequential method)were discussed.Short-term(2 d,28 d)and long-term(1 a)stabilization effects of different types of Cr contaminated soil were investigated through nature curing,using three agents including ferrous sulfate,sodium sulfide and sodium sulfite.The content of chromium in the residual form was the largest,followed by the iron-manganese oxide-bound forms and organic and carbonate binding forms.The results indicated that all the three agents could effectively and rapidly decrease total leaching Cr and Cr(VI)content in the short term.The stabilization effect of different agents was further improved after long-term curing.

关 键 词：铬 土壤 形态 稳定化 

分 类 号：X53[环境科学与工程—环境工程]