秦岭铅锌矿冶炼厂区周边土壤重金属分布特征研究

目的为了解铅锌过程中重金属对周边土壤的污染情况。方法对秦岭凤县铅锌矿冶炼厂周边8个区域土壤中Zn、Pb、Cd、Cu等4种主要重金属的分布规律进行了初步研究，分析了冶炼厂周边环境现状，提出了对策建议。结果研究表明冶炼厂周边土壤重金属污染严重，绝大部分区域重金属含量已超过对照点测定值和国家土壤环境质量二级标准，最高超标倍数依次为Zn10倍、Pb6．5倍、Cd6．2倍、Cu4．0倍。结论厂区常年主导下风向土壤中重金属含量高于上风向土壤中；冶炼厂周边土壤环境中重金属污染以Zn为主，其次为Pb和Cd，Cu污染较小。

The study of heavy metals distribution character in soil about lead-zinc smelt mill in Qinling

Aim To understanding the pollution condition of heavy metals about Primary study the distribution character of 4 kinds of mostly heavy metals in 8 areas soil. Methods soil about leadzinc smelt mill of Fengxian in Qinling, Shaanxi,China. Environmental status about lead-zinc smelt mill are discussed and some countermeasures are proposed. Results The results indicated that the soil near the lead-zinc smelt mill has been contaminated by heavy metals, the heavy metals content in mostly soil had exceeded Chinese National Standard Ⅱ of soil environmental quality（GB15618-1995）. The tiptop content of Zn,Pb,Cd and Cu is 10 times,6.5 times,6.2 times and 4.0 times more than the national standard Ⅱ respectively. Conclusion The heavy metals content in soil of perennial dominant under wind direction is excess the content in soil of perennial dominant above wind direction about lead-zinc smelt mill. It was discovered that zinc was the main pollutant in the soils studied, the lead and cadmium was second, the copper was less relatively.