新邵研究区重金属污染调查与来源初步分析

Investigation and Preliminary Analysis of Heavy Metal Pollution and its Source in Research Area of Xinshao

以Cu、Cd、Zn、As、Hg、Pb、Zn、Sb等8种重金属元素为主要研究对象,采集研究区水样和土壤样品,测定重金属元素含量,分析其污染现状、空间分布和污染来源等特征,对其生态风险进行评价。研究表明,水体中,Sb超标率为100%,最大超标235.18倍,为主要重金属污染物;部分样品Cd、Pb含量>Ⅰ类标准限定值而<Ⅱ标准限定值,具有潜在生态风险。土壤中,Sb有91.97%的面积超过10×10-6,As、Hg、Pb、Cu分别有70.43%、61.54%、73.93%、16.67%的面积超过土壤环境质量一级标准,反映出这些元素对该区域土壤构成较大的生态风险。重金属元素高背景值区域基本和地质构造位置套合,表明研究区的重金属元素污染主要来源于地质构造活动导致的元素富集区,是区域土壤、水体中高含量重金属元素的重要来源。

Taking8kinds of heavy metal elements Cu,Cd,Zn,As,Hg,Pb,Zn and Sb as the main research object,collecting water and soil samples from the study area,and determine the content of heavy metal elements,analysis the pollution situation and spatial distribution characteristics and pollution sources,to evaluate its ecological risk.The results show that the over standard rate of Sb in water is100%,and the maximum is235.18times,which is the main heavy metal pollutant;some sample Cd and Pb content>I kinds of standard limitation values,but<II standard limitation values,have the latent ecology risk.In the soil,Sb has91.97%of the area of more than10×10-6,As,Hg,Pb and Cu were70.43%,61.54%,73.93%,16.67%of the area over the soil environmental quality standards,reflect these elements of the regional ecological risk of soil.Heavy metals in high background value of regional geological structure and basic position set,shows that the pollution of heavy metal elements enrichment zone mainly originates from the tectonic activities lead to elements of the region,is an important source of high content of heavy metals in soil and water in the area.