湖南临湘铅锌矿尾矿库环境状况及开发利用研究

Environmental Conditions and Exploitation of Lead-Zinc Tailings in Linxiang County,Hunan Province

通过对临湘铅锌矿尾矿库区的沙、土、水环境状况调查与评价,了解到铅锌矿尾砂粒径小,为细砂和粉粒,缺磷无氮、有机质含量低,阳离子代换量低,保水保肥能力较弱而不宜于直接耕作和植树;尾砂中Pb、Cd、Hg、Zn、Cu等含量较高,已对周边地区土壤和水体造成轻度污染;放射性低于一般环境。在加固堤坝,开沟排渗等治理工程完成后,应植草护坡,拌土种草植树,改善其生态环境;同时利用其优越的地理位置和资源优势,把其纳入“龙潭湖风景区”,开展沙浴、滑沙、赛马、跳伞、自驾车、烧烤和夏令营等参与性强的生态旅游项目,将其建成时尚前卫的休闲度假公园。

The status of sand, soil and water environment of the lead - zinc tailings in Linxiang County, Hunan Province was investigated and evaluated. The results showed that： （1） the tailings mainly contained small size particles, including fine sand and silt, which were lacking of N, P organic matter. Low in CEC and poor in water holding ability, and thus, the tailing dam was unsuitable for cultivating and planting trees directly; （2） the tailings contained higher contents of Pb, Cd, Hg, and Zn, Cu than backgrounds, but the radioactivity was low. When doing the exploitation on the tailing dam, it should be done that planting grasses to protect the bank and mixing the soil to the tailings for planting grass and trees to improve its ecological environment.