摘要
以我国典型有色金属尾矿库为研究对象,结合多元统计分析来探究尾矿库重金属的空间分布及污染来源。结果表明,尾矿库及周围非矿区林地重金属严重累积;尾矿库重金属有着明显的空间分布规律;Cu、Zn、Cd、Pb显著相关(p<0.01),Cr、Ni两者显著相关(p<0.05)。Cr,Ni,Cu,Zn,Cd,Pb重金属潜在生态危害系数平均值分别为4.721,27.287,27.711,68.478,2624和1211,其大小顺序为:Cd>Pb>Zn>Cu>Ni>Cr。尾矿库中89%以上区域为很强生态危害级别,Cd和Pb为该矿区潜在生态危害主要贡献因子。
To investigate the geochemical characteristics and to assess the potential ecological risk of heavy metals in the tailing areas, the samples were collected from the typical non-ferrous metal tailing in mining district, China. The spatial distribution and source of heavy metals were identified through multivariate analysis. The average concentrations of Cr, Ni, Cu, Zn, Cd and Pb were higher than their corresponding background values. Multivariate statistical analyses, correlation coefficient showed that significant correlations existed among Cu, Zn, Cd and Pb（p〈0. 01）, Cr and Ni（p〈0. 05）. The average values of potential ecological risk were 4. 721, 27. 287, 27. 711, 68. 478, 2624 and 1211 for Cr, Ni, Cu, Zn, Cd and Pb, respectively. The potential ecological risk factor of heavy metals was in the order of Cd〉Pb〉Zn〉Cu〉Cr〉Ni. More than 89% of samples were moderately or highly contaminated with heavy metals. Cd and Pb shared high potential ecological risk in most of sampling sites.
出处
《广州化工》
CAS
2015年第17期156-158,178,共4页
GuangZhou Chemical Industry
基金
国家自然科学基金(No:41430106)
环保部环保公益项目(No:201409042)
关键词
尾矿库
重金属
空间分布
生态危害
tailing
heavy metals
spatial distribution
potential ecological risk
