摘要
选择洞庭湖平原为研究区,分别于丰水期和枯水期采集地下水样品,检测分析样品中重金属元素(Al、Fe、Mn、Pb、Zn、Cr、As、Cu、Cd),探究洞庭湖区浅层地下水重金属元素的含量和时空分布规律,并对重金属的来源进行分析。分析结果表明:在丰水期(7月)浅层地下水中铁离子的浓度最高,而在枯水期(10月)浅层地下水重金属中锌离子的浓度最高。浅层地下水中重金属浓度分布有明显的时间特征,不同区域、不同环境的地下水体重金属含量空间差异大。浅层地下水中的Al来源于铝硅酸盐及高岭石的溶解;Fe元素除来自于自然矿物溶解外还有人为来源;沅江流域Mn和Zn,一部分Cd、Pb可能来源于农业污染;沅江上游浅层地下水中Pb元素可能来源于磷化工生产。
The Dongting lake plain was selected as the research area.Groundwater samples were collected in the wet season and the dry season,respectively.The heavy metal elements(Al,Fe,Mn,Pb,Zn,Cr,As,Cu,Cd)in the samples were detected and analyzed.The content and spatial and temporal distribution of heavy metal elements in shallow groundwater in Dongting lake area were explored,and the sources of heavy metals were analyzed.The results showed that:The concentration of iron ions in shallow groundwater was the highest in the wet season(July),while the concentration of zinc ions in shallow groundwater was the highest in the dry season(October).The heavy metal content of groundwater vary greatly in different regions and environments.Al in shallow groundwater comes from the dissolution of aluminosilicate and kaolinite;in addition to the dissolution of natural minerals,Fe also comes from human sources.Mn and Zn in the Yuanjiang river basin,some Cd and Pb may come from agricultural pollution;the Pb element in shallow groundwater in the upper reaches of Yuanjiang river may be derived from phosphorus chemical production.
作者
李亚陆
方荣杰
欧健
LI Ya-lu;FANG Rong-jie;OU Jian(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin 541004,Guangxi,China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Areas,Guilin 541004,Guangxi,China;Hunan Geological Disaster Emergency Rescue Technology Center/Hunan Institute of Geological Disaster Investigation and Monitoring,Changsha 410029,Hunan,China)
出处
《地下水》
2023年第5期30-33,46,共5页
Ground water
基金
洞庭湖水体重金属分布特征及生态环境地质风险评价科研项目。
关键词
洞庭湖平原
浅层地下水
重金属时空分布特征
来源分析
Dongting lake plain
Shallow groundwater
Spatial-temporal distribution characteristics of heavy metals
Sourceanalysis
