摘要
盘古山钨矿开采和选矿过程中产生大量的尾砂,这些尾砂随着外部环境的改变而释放有毒重金属,这些重金属对周围环境和生物的生存产生了严重的威胁,研究尾砂中重金属的迁移规律,对治理尾砂提供依据.本研究主要选取三处有代表性的尾砂来探讨重金属在不同环境条件下的迁移规律,通过试验研究可知:依据重金属在不同尾砂深度的变化幅度不同,盘古山钨矿尾砂重金属迁移规律为:在20世纪50～60年代尾砂中,各重金属的迁移能力是:As>Mo>Zn>Pb>Cr,其中As最大,其他4种重金属相差不大.在人工植被修复30年尾砂中,各重金属的迁移能力为:Zn>As>Mo>Pb>Cr,其中重金属As和Zn的迁移率最大,Cr、Pb、Mo的迁移率相差不大.新尾砂中,各重金属的迁移能力大小为:Mo>Zn>As>Cr>Pb.
The tailings out of the mining and ore-dressing process in Pangushan Tungsten Ore release heavy metals with changing environment.The heavy metals released poses serious threat to the survival of the surrounding environment and species.This article studies heavy metals＇migration regulation under different environmental conditions by selecting three representative tailings.The migration ability hierarchy for the tailings of 1950s-1960s is： As Mo Zn Pb Cr,in which As is highest,while the other four exhibit little difference.The migration ability hierarchy of heavy metals under 30-year artificial vegetation restoration is ZnAsMoPbCr,in which As and Zn have the maximum migration rate.The migration ability for new tailings is MoZnAsCrPb.
出处
《有色金属科学与工程》
CAS
2012年第2期87-91,共5页
Nonferrous Metals Science and Engineering
关键词
尾砂
重金属
迁移
tailings
heavy metals
migration
