珠三角地区铸造厂土壤重金属的分析研究

Study on Heavy Metals in Soils Surrounding the Foundry of the Pearl River Delta Area

工业化经济发展给生态环境带来的重金属污染日益引起人们的关注。本文选取珠三角地区某铸造厂为研究对象,采集企业周边土壤样品,分析样品中8种重金属含量,对土壤中重金属的浓度、污染指数、相关性分析进行评价。结果表明,重金属元素主要富集在土壤表层,土壤样品中Hg和Cd的污染程度高于其他金属元素,尤其是Hg,且主要体现在CC铸造厂。重金属Pb、Cr、Cd、As、Ni、Cu、Zn的污染来源密切相关;相反,Hg与其它7种元素间均无明显的相关性,表明Hg的污染来源相对独特。

The problem of heavy metal pollution caused by industrialization has drawn increasing attention.The concentrations of eight heavy metals in soils surrounding foundry of Pearl River delta areas were studied by field sampling,aiming to evaluate the pollution and the relationship of the contaminated soil.The results showed that heavy metals enriched mainly in surface soils.The severity of heavy metals pollution of Hg,Cd were higher than other heavy metals,especially Hg,which was reflected in the CC electroplating city.The sources of Pb,Cr,Cd,As,Ni,Cu and Zn were closely related each other,on the contrary,there was no significant correlation to Hg and any other heavy metal,which indicated that the pollution source of Hg was unique relatively.