黄石市某发电厂周边表土重金属含量研究与污染评价

Research on Topsoil Heavy Metal Content around a Power Plant and Its Pollution Assessment in Huangshi City

摘要: 本研究以黄石市某发电厂周边15个表层土壤样品为研究对象，通过定量分析和数理统计的方法，分析了该区域表层土壤中重金属含量的空间分布特征，并利用单项污染指数方法对该区域土壤重金属污染现状进行评价。研究结果表明：1) 四种重金属元素中，Zn的含量最高，为2284.25 mg/kg；2) Cu和Zn的含量在研究区域内呈南低北高分布，Cd的含量在整体上有由陆地向沿江递减的趋势；3) 研究区域没有受到Ni的污染，而Zn、Cu、Cd三种重金属在研究区域内均属于重度污染，其中Cd的含量远远超过了国家标准。

Abstract: With 15 top soil samples around a power station in Huangshi, we used quantitative analysis and mathematical statistics to analyze spatial distribution of heavy metal, and used single index method to evaluate present condition of heavy metal content in the area. The results indicated that: 1) The content of Zn is highest among the four heavy metals, its 2284.25 mg/kg; 2) The content of Cu and Zn is high in south and low in north, and Cd decreases from land to river on the whole; 3) The area is not polluted by Ni but severely polluted by Zn, Cu and Cd, among which the content of Cd is over national standard enormously.