新乡市水源地土壤重金属含量特征及其对地下水的影响  

Quantitative characteristics of soil heavy metals in tap water resources field of Xinxiang and their effects on groundwater

作　　者：张春燕[1] 王学锋[1] 王建玲[1] 朱桂芬[1] 皮运清[1] 

机构地区：[1]河南师范大学化学与环境科学学院

出　　处：《生态学杂志》2007年第9期1355-1358,共4页Chinese Journal of Ecology

基　　金：河南省自然科学基金项目(0611012000);新乡市科技攻关项目(06S049);河南师范大学新引进硕士科研启动支持课题资助项目(052046)

摘　　要：对新乡市自来水水源地土壤和地下水重金属含量特征进行分析,结果表明:土壤中Pb含量达标,Zn、Cr、Ni和Cu含量超标,其平均含量分别为1213.80、115.22、189.56和60.39mg.kg-1;用化学连续浸提法对超标元素化学形态分布进行研究表明,Zn、Cr、Ni和Cu残渣态含量最高,所占比例分别为87.81%、78.38%、84.26%和59.33%,可交换态含量最低,所占比例分别为0.21%、2.56%、1.00%和3.51%,由于Zn、Cr、Ni、Cu主要以迁移性最弱的残渣态为主,未发现地下水中重金属含量超标。The study on the quantitative characteristics of heavy metals in the soil and groundwater in tap water resources field of Xinxiang showed that soil Pb content achieved the national standard for soil, while Zn, Cr, Ni and Cu contents were over the standard, with the average contents being 1 213.80, 115.22, 189.56 and 60. 39 mg · kg^-1, respectively. According to the sequential extraction of the over-standard heavy metals, Zn, Cr, Ni and Cu were dominated by residual fraction, with the percentages being 87. 81%, 78, 38%, 84. 26% and 59.33%, respectively, and the least amounts were the exchangeable fraction, with the percentages of 0. 21%, 2.56%, 1.00% and 3.51%, respectively. Due to the weak mobility of the residual fraction, the Zn, Cr, Ni and Cu contents in groundwater were not over the national standard for groundwater.

关 键 词：土壤 重金属 地下水 形态分析 

分 类 号：X53[环境科学与工程—环境工程]