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淮南潘集煤矿复垦区土壤重金属含量及形态分布特征

发表时间:2013-12-31  浏览量:1688  下载量:451
全部作者: 江培龙,方凤满,焦华富,张杰琼,邓正伟
作者单位: 安徽师范大学国土资源与旅游学院;安徽师范大学安徽省自然灾害过程与防控研究省级实验室
摘 要: 以淮南矿区挖深垫浅式复垦区为研究对象,对该复垦区土壤7种重金属(Zn,Pb,Ni,Mn,Cu,Cr和As)含量进行分析和评价。结果表明:该复垦区土壤中Ni,Mn,Cu,As的平均含量均高于土壤背景值,但均未超过土壤二级标准。蔬菜大棚土壤中7种重金属的含量均高于林地土壤的含量,除As外,林地土壤中其余6种重金属的变异系数均大于蔬菜大棚土壤的变异系数。形态分析表明:该复垦区Zn,Ni,Cu,Cr和As以残渣态为主,Mn和Pb以Fe-Mn氧化物结合态为主。除未复垦对照样点的综合污染指数最小为0.97,处于警戒线位置外,其余18个复垦土壤的综合污染指数的分布范围为1.12~1.81,均表现为轻度污染。林地和大棚地的综合污染指数平均值分别为1.41,1.48.
关 键 词: 土壤环境学;淮南矿区;土地复垦;土地用途;重金属;污染评价
Title: Speciation and concentration of heavy metals in reclaimed soils at Huainan city coal mine
Author: JIANG Peilong, FANG Fengman, JIAO Huafu, ZHANG Jieqiong, DENG Zhengwei
Organization: College of Territorial Resources and Tourism; Anhui Key Laboratory of Natural Disaster Process and Prevention, Anhui Normal University
Abstract: Samples were collected around Huainan reclamation of coal mine and the contents of seven heavy metals (Zn, Pb, Ni, Mn, Cu, Cr, As) in this area were analysized and assessed. The results showed that the concentration of Ni, Mn, Cu, As in reclaimed soil exceeded background value of Huainan soil. However, the concentrations of all 7 heavy metals in reclaimed soil were not beyond National Soil Environmental Quality Standard of GradeⅡ. The concentrations of all heavy metals in vegetable greenhouse soil were higher than forest land. The variation coefficient of heavy metals (excluding As) in vegetable greenhouse soil were lower than forest land. Sequential extrations suggested that in the reclaimed soils, Zn, Ni, Cu, Cr, As were mainly composed with residual fraction, while Mn, Pb were donimated by Fe-Mn oxide form. The integrated pollution index of reference soil was recognized as warning limit (0.97). Meanwhile, the integrated pollution index of other 18 soils were between 1.12 and 1.81, which were slight pollution. The integrated pollution index of vegetable greenhouse soil and forest land soil were 1.41 and 1.48 separately.
Key words: soil environmentology; Huainan mining ared; reclaimed soil; usage of soil; heavy metal; pollution assessment
发表期数: 2013年12月第24期
引用格式: 江培龙,方凤满,焦华富,等. 淮南潘集煤矿复垦区土壤重金属含量及形态分布特征[J]. 中国科技论文在线精品论文,2013,6(24):2313-2320.
 
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