摘要
为研究环梵净山河流溶解态重金属的污染水平与分布特征,文章测定了2019年11月至2020年1月间(枯水期)其水体中Cr、Mn、Cu、Zn、As、Se、Cd、Sb、Pb等9种溶解态重金属含量。水质评价表明,除牛尾河的Sb含量略微超过国家生活饮用水卫生标准值外,所测其他7条河流9种重金属的含量均符合相应的国家Ⅰ类地表水水质标准与国家生活饮用水卫生标准。多元统计分析表明,9种重金属可以归为4个主成分,其中PC1(Mn、Cu、As、Cd和Pb)主要受自然地质背景的影响,PC2(Cr)来源于板岩的风化与侵蚀过程,PC3(Zn)主要与交通运输过程中释放的重金属密切相关,PC4(Sb)主要由历史上采矿活动贡献。内梅罗综合污染指数法评价结果表明,除Sb的污染指数值略大于1外,环梵净山河流中其他8种重金属污染指数值均低于1,Sb超标仅出现于牛尾河,其他7条河流均未出现污染状况。
Dissolved heavy metals including Cr,Mn,Cu,Zn,As,Se,Cd,Sb and Pb were monitored in the surrounding rivers of Fanjingshan Mountain from November 2019 to January 2020.The water quality evaluation result shows that concentrations of these heavy metals except Sb satisfied the GradeⅠof Environmental Quality Standards for Surface Water(GB 3838-2002)and Standards for Drinking Water Quality(GB 5749-2006),and Sb concentration of Niuwei River was slightly inferior to the GradeⅠ.Results of multivariate analysis show that the 9 heavy metals can be classified into four principal components:PC1(Mn,Cu,As,Cd and Pb)was mainly influenced by natural geological background;PC2(Cr)was mainly influenced by the natural disintegration and erosion of slate;PC3(Zn)was mainly influenced by traffic pollution factors;PC4(Sb)was mainly influenced by mining activities.The Nemero comprehensive pollution index showed that the overall pollution level of heavy metals except Sb in surface rivers of Fanjingshan Mountain is lower than 1,suggesting that all these rivers except Niuwei River were at safe and clean levels.
作者
赵海
杨周
涂成龙
ZHAO Hai;YANG Zhou;TU Chenglong(School of Tourism and Geography,Tongren University,Tongren 554300,China;Key Laboratory of Environmental Pollution Monitoring and Disease Control of Ministry of Education,Guizhou Medical University,Guiyang 550025,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2020年第7期194-199,共6页
Environmental Science & Technology
基金
2019年度铜仁市科技计划项目(铜市科研(2019)91号)
贵州省教育厅青年项目(黔教合KY字[2018]344)
贵州省教育厅人才拔尖项目(黔教合KY字[2018]074)
铜仁学院博士科研启动基金课题(trxyDH1812)。
关键词
梵净山
溶解态重金属
枯水期
空间分布
Fanjingshan Mountain
dissolved heavy metal
dry season
spatial distribution
