施加堆肥后土壤中重金属形态变化研究——造纸污泥堆肥农用的重金属污染研究之二  

Study on the Chemical Forms of Heavy Metals in Soil Amendment with Compost-The Pollution of Heavy Metals Caused by Paper Mill Sludge Compost in Agriculture(Ⅱ)

作　　者：林云琴[1,2] 周少奇[2] 王德汉[1] 

机构地区：[1]华南农业大学资源环境学院,广东广州510642 [2]华南理工大学造纸与环境工程学院

出　　处：《中国造纸学报》2007年第4期51-55,共5页Transactions of China Pulp and Paper

基　　金：广东省环保局科技研究开发项目(2001-28)。

摘　　要：重金属形态研究是评价重金属污染风险度的方法之一。本研究测试分析了添加堆肥前后和种植作物前后土壤重金属的5种形态。结果表明:添加污泥堆肥前后的土壤中Cu、Ni、Cr、Pb主要以残渣态形式存在,Zn主要以Fe-Mn氧化态形式存在,这两种形态的重金属的生物有效性都很小,而Cd主要以可交换态和碳酸结合态存在,生物有效性较大;添加堆肥后土壤的重金属生物有效性有所降低,当在添加堆肥的土壤上种植作物后,土壤中重金属的生物有效性将进一步降低。One of the methods to evaluate pollution degree of the heavy metals is to measure its chemical forms. This paper discussed chemical forms of the heavy metals in the soil with paper mill sludge compost. The result showed that most of the existing forms of Cd are inexchangeable and carbonas bonding state with higher biohazard, and most of the existing forms of Cu,Ni,Cr.Pb in the soil are the residue, but for Zn, it is mainly in Fe-Mn oxid state. The biohazard of the latter two chemical forms of heavy metals is very limited. Moreover, the biohazard of all above heavy metals will reduce after planting crops in the soil with this sludge compost.

关 键 词：造纸污泥堆肥 农用 重金属形态 

分 类 号：X171.5[环境科学与工程—环境科学] X793