广东大宝山矿区周围土壤重金属污染状况评价

在大宝山矿区及周边四个区域(Ⅰ区、Ⅱ区、Ⅲ区和Ⅳ区)共采集土壤表层样品52件。针对不同采样点和不同区段的整体研究,文章在单因子指数的基础上对研究区重金属复合污染分别采用内梅罗指数和综合污染负荷法综合进行研究。矿区土壤中重金属元素污染程度有差异,其中Cr、Ni、Hg、Sn、Pb、Zn、As等重金属元素无或轻污染,Cu、Cd等则对该区土壤环境有较大影响。研究矿区内4个地段土壤重金属污染的总体状况研究结果显示,Ⅳ区(矿部区)土壤污染最为严重,其次为Ⅲ区(鸡笼铺区)和Ⅰ区(沙溪镇区),Ⅱ区(梅子坑区)相对较轻。

Pollution Assessment of Heavy Metals in Soil around Dabaoshan Polymetallic Ore Deposit

52 soil samples were obtained from Dabaoshan ore deposit and the surrounding regions(zoneⅠ,Ⅱ,Ⅲ and Ⅳ).Aiming at overall study at different sampling points and districts,the author introduced Nemerow Index and Comprehensive Pollution Load method on the basis of single factor index of heavy metals contamination in the study area.The level of heavy metal contamination in this area varies,with Cr,Ni,Hg,Sn,Pb,Zn,As as low pollution or not,and Cu,Cd quite high.Studies on heavy metals of the four districts indicate that the pollution in zoneⅣ is most serious,then followed by zoneⅢ and Ⅰ,and zoneⅡis relatively light.