摘要
以中国西南季节性缺氧湖泊阿哈湖为主要研究对象,在湖区及周边设置了12个点分别采集了夏季(7月)和冬季(11月)的水体样品,测定了水样中13种重金属元素(As、Co、Cr、Cd、Fe、Cu、Zn、Ni、Pb、Mo、Mn、Hg及Se)的含量。与不同地区水体水质标准进行了对比,并利用相关性分析与主成分分析剖析其分布特征与来源。结果表明:夏季丰水期(7月)湖区周边各重金属元素含量依次为:Mn>Fe>Ni>Co>Zn>Cu>As>Cr>Cd>Pb>Hg,而冬季枯水期(11月)则为:Mn>Fe>Zn>Ni>As>Cu>Co>Cr>Pb>Hg>Cd。水体重金属元素含量分布可能受季节性Fe-Mn氧化还原反应影响较大;游鱼河作为库区主要支流,煤矿开采对水体中Fe、Mn等元素贡献量很大,而白岩河与金钟河则分别主要受农业耕作、城镇生活污水的影响;相关性与主成分分析表明,夏季库区周边水体中Co、Cd、Fe与Zn、Ni、Mn呈显著的正相关关系,As与Cr、Mo、Se呈显著的正相关关系,Cu与Pb呈极显著的正相关关系,而Hg与其它重金属元素之间无明显相关关系。Cd、Zn、Ni、Co、Fe及Mn为库区周边流域水体中主要重金属,并具同源性,主要受矿产开采因子的影响。
Aha lake,a seasonal anoxic lake and a drinking water source in southwestern China,was selected for this research.Summer( July,rain season) and winter( November,dry season) water samples were collected from 12 locations around the reservoir.Thirteen trace elements( As,Co,Cr,Cd,Fe,Cu,Zn,Ni,Pb,Mo,Mn,Hg and Se) were determined and compared with different water quality standards,furthermore,the distribution characteristics and possible sources were analyzed by correlation analysis and principal component analysis.The results showed that the order of heavy metal concentrations in summer was: Mn>Fe>Ni>Co>Zn>Cu>As>Cr>Cd>Pb>Hg,while,the order in winter was: Mn>Fe>Zn>Ni>As>Cu>Co>Cr>Pb>Hg>Cd.The temporal variations of heavy metal concentration was influenced by the seasonal Fe-Mn redox reaction.Youyu River,as the main tributary of the reservoir,was significantly impacted by the coal mining activities that contribute a lot of Fe and Mn in the water system.Baiyan River and Jinzhong River were mainly influenced by the agricultural cultivation and urban domestic sewage,respectively.Correlation and principal component analysis showed that Co,Cd,Fe were significantly positively correlated with Zn,Ni and Mn in summer,and As was positively correlated with Cr,Mo and Se.Besides,there was a distinct positive correlation between Cu and Pb,while insignificant correlation was found between Hg and other heavy metals.Cd,Zn,Ni,Co、Fe and Mn were the main heavy metal elements around the reservoir and had the same origin that was influenced by the mineral exploitations.
作者
费志军
王柱红
唐杨
FEI Zhijun;WANG Zhuhong;TANG Yang(School of Public Health,Key Laboratory of Environmental Pollution Monitoring and Disease Control,Ministry of Education,Guizhou Medical University,Guiyang 550025,China;State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;Key Laboratory of Karst Environment and Geohazard Prevention,Guizhou University,Guiyang 550025,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2021年第1期42-50,共9页
Earth and Environment
基金
国家自然科学基金项目(41603020)
贵州省科技支撑计划[2019]2832
贵州医科大学博士启动基金项目(YJ2017-26)
国土资源部喀斯特环境与地质灾害重点实验室开放基金项目(2016K03)。
关键词
阿哈湖
重金属
分布特征
来源
Aha lake
heavy metal
distribution characteristics
source
