摘要
土壤重金属铬来源极广,是一种重要的重金属污染源,随经济的发展土壤铬污染越来越严重。铬在土壤中主要以Cr(Ⅵ)和Cr(Ⅲ)两种形态存在,Cr(Ⅲ)的稳定性较强,毒性较弱,土壤中易与胶体发生结合产生沉淀,Cr(Ⅵ)稳定性差毒性强且溶于水或土壤中,对人体危害较大。土壤中的不同形态的铬在pH、Eh、有机质、微生物、Fe(Ⅱ)及硫化物等条件的影响下,Cr(Ⅵ)和Cr(Ⅲ)之间可以发生相互转化,Cr(Ⅵ)还原为Cr(Ⅲ)时可降低土壤中Cr(Ⅵ)的毒性,减小对生物体的危害。
As an important heavy metal pollution source,chromium pollution in soil is becoming more and more serious with the development of economy.Chromium in soil mainly Cr(Ⅵ)and Cr(Ⅲ)two kinds of form,the stability of the Cr(Ⅲ)is stronger,less toxicity,easy with colloidal precipitation,soil Cr(Ⅵ)toxicity of poor stability and soluble in water or soil,harm to human body.Under the influence of pH,Eh,organic matter,microorganisms,Fe(Ⅱ)and sulphides,the different forms of chromium in the soil are transformed into each other,which can reduce the toxicity of Cr(Ⅵ)in the soil and reduce the harm to living body.
作者
向娇
董秋瑶
宋超
XIANG Jiao;DONG Qiu-yao;SONG Chao(HeBei GEO University,Shijiazhuang 050000,China;Institute of Hydrogeological and Environmental Geology,Chinese Academy of Geosciences,Shijiazhuang 050061,China;Key laboratory of Quaternary Chronology and Hydro-Environmental Evolution,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China)
出处
《世界有色金属》
2020年第22期138-139,共2页
World Nonferrous Metals
基金
黄土包气带易溶盐的特征,来源及其水文环境意义研究(SK201911)。
关键词
重金属铬
分布规律
影响因素
Heavy metal chromium
distribution law
influence factors
