塔儿山铁矿区土壤重金属污染评价及来源分析

POLLUTION ASSESSMENT AND SOURCE ANALYSIS OF HEAVY METALS IN SOILS OF IRON MINING AREA IN TA'ER MOUNTAIN

通过采样分析山西省临汾市塔儿山铁矿区土壤中重金属元素的含量,揭示塔儿山铁矿区土壤中重金属污染的程度和来源,为矿区土壤污染治理修复提供参考依据。在尾矿区、复垦区、当地原始农业土壤区、处理污灌农地土区分别随机采集土壤样品,并进行9种重金属含量测定,采用地累积指数法和变异系数进行污染等级评价分析,并测定了土壤p H值。矿区As、Se、Zn、Pb 4种元素达到强度污染标准,Cd、Cr、Cu、Ni 4种元素为轻中度污染,无Hg元素污染;铁矿区土壤的p H值高于8.0,属于强碱性,不利于农作物的正常生长发育。粗放的铁矿开采活动是产生重金属污染的主要原因。

Through sampling and analyzing of the heavy metal elements column of the soil in Ta＇er Mountain iron area of Linfen,Shanxi province,the paper revealed the extent and source of heavy metal pollution of the Ta＇er Mountain iron area,and provided reference for soil pollution by mining restoration for the iron area. Collecting soil samples randomly at the end of mine,reclamation area,local raw soil area of agriculture,processing sewage irrigated farmland soil zone,nine kinds of heavy metal content were determinated using accumulates index and the coefficient of variation pollution level of evaluation and analysis,and the value of soil p H was measured. In the mine area,As,Se,Zn,Pb reached strength pollution standards,Cd,Cr,Cu,Ni reached moderate pollution standards,without Hg; the p H value of the iron soil was over 8. 0 and belonged to strong alkaline,which was not conducive to normal growth and development of crops. Extensive iron ore mining activities were the main reason of heavy metal pollution.