蔡奎;张蒨;吴云霞;王贝;

• 1:河北地质大学地质调查研究院
• 2:河北地质大学资源与环境工程研究所
• 3:河北地质大学资源学院

摘要(Abstract)：

土壤重金属污染防治已迫在眉睫,国内外对重金属污染研究热度不减。本文选择河北平原农田为研究区,对采集325个根系土样品中的Cd、Cr、Pb、As、Hg等5种重金属进行了各形态含量统计与分析,并用Arc GIS制作了有效态空间分布图。最后运用相关性分析法探讨了5种重金属各形态与全量及pH值、Fe_2O_3、总有机碳(TOC)、阳离子交换容量(CEC)、粘粒的相关性。研究表明:Cd的有效态(水溶态和离子交换态)含量占全量比重最大,为18.06%,Cr、Pb、As、Hg均低于10%,这4种金属以残渣态为主,占全量的50%以上;As元素各形态与全量、pH值、Fe_2O_3、TOC、CEC、粘粒的相关程度最高,成正相关关系;Cr的3种形态(铁锰氧化态、强有机结合态、残渣态)与Fe_2O_3、TOC、CEC、粘粒呈显著正相关关系,Cr碳酸盐结合态、腐殖酸结合态与pH呈正相关关系,与Fe_2O_3、TOC、CEC、粘粒呈显著负相关关系;5种重金属铁锰氧化态与pH均呈正相关关系。

关键词(KeyWords)： 重金属;河北平原;形态;控制因素

Abstract:

Keywords:

基金项目(Foundation): 河北省政府与中国地质调查局合作项目“河北省农业地质调查项目”(200414200007)

作者(Author): 蔡奎;张蒨;吴云霞;王贝;

Email:

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