摘要 分析检测了某铅锌矿区水、土壤、尾矿、废石等样品重金属元素含量,追踪调查了尾矿库、排土场下游土壤重金属污染程度和分布范围,并对重金属元素相关性进行了研究。结果表明:铅锌矿区土壤环境质量总体较差,铅锌矿区重金属污染集中分布在尾矿库和排土场下游地块;铅锌矿区主要污染元素为Cd、Cu、Pb、Zn、As,污染程度以轻度-中度污染为主;尾矿库下游重金属元素Cu、Pb、Zn、As污染分布在1 600m内;排土场重金属污染范围主要集中在下游400m内。土壤样品Cu、Pb、Zn与As、Cd元素呈显著正相关性,Cu、Pb、Zn、As、Cd元素来自同一源头,可能源自尾矿、废石等固体废物;Hg、Cr、Ni元素来自另一源头,与矿业活动无关。 Contents of heavy metal elements in samples of water,soil,tailings and waste rocks from a lead-zinc mining area were analyzed.Pollution degree and distribution of heavy metal in downstream soil of tailings pond and dump were surveyed,and correlation between these heavy metal elements was studied.The results show that soil environmental quality of lead-zinc mining area is poor,where heavy metal pollution is concentrated in downstream plots of both tailings pond and dump.Main pollutants in mining area are Cd,Cu,Pb,Zn and As,and pollution degree of Cd,Cu,Pb,Zn and As is mainly from light to moderate.Heavy metal pollution in downstream plot of tailings pond exceeds the standard GB 15618—2018 within1 600 m,while pollution is mainly concentrated in downstream area within 400 m.Elements of Cu,Pb and Zn in soil samples show significant positive correlation with As and Cd,and they come from the same source which may be tailings,waste rocks and other solid wastes.Elements of Hg,Cr and Ni are likely to come from another same source,which possibly had nothing to do with mining activities.
出处 《有色金属:冶炼部分》 CAS 北大核心 2021年第3期102-108,共7页 Nonferrous metals(Extractive metallurgy)
基金 中国地质调查局地质调查项目(DD20190269)。
