摘要
地下水是农村地区的重要饮用水源之一,对其重金属的评价是水质评价的重要内容。使用电感耦合等离子体发射光谱仪(ICP-OES)对山东省平邑县49个村庄的地下水中的重金属Cu、Fe、Pb、Zn、Cr和Cd的浓度进行了测定,并对其分布特征和主要来源进行了探讨。结果显示,该研究区地下水中Cu、Fe、Pb、Zn、Cr和Cd的含量范围分别为0～0.127、0.01～0.532、0～0.006、0.025～8.459、0～0.035、0～0.001mg·L-1。取样点的重金属浓度大多符合我国饮用水质量标准和EPA饮用水质量标准,只有2个样点Fe的含量和3个样点Zn的含量超出了我国饮用水质量标准和EPA饮用水质量标准。通过相关分析发现,该区地下水中6种重金属元素中Zn和Fe以及Cr和Pb存在极显著的相关性,据此可以判断,Zn和Fe、Cr和Pb的来源或迁移路径可能相同。利用地理信息系统软件(ArcGis)的反距离权重法(Inversedistanceweighting)对该县地下水中重金属浓度的分布特征进行分析,结果发现,该区地下水中Cu、Fe、Pb、Zn、Cr和Cd的浓度呈现斑块状分布,空间差异性大,这表明该地重金属的浓度差异与人类活动有关。
Groundwater is one of the most important water resources for drinking in the rural areas,so the assessment of heavy metals in groundwater is essential for evaluating water quality.In this study,groundwater samples were taken from 49 villages in Pingyi County which is a representative mountainous area in the south of Shandong Province,China.The concentrations of Cu,Fe,Pb,Zn,Cr,and Cd were analyzed using Inductively Coupled Plasma-Optical Emission Spectrometer（ICP-OES）.The results indicated that the concentrations of Cu,Fe,Pb,Zn,Cr,and Cd ranged from 0～0.127 mg·L-1,0.01～0.532 mg·L-1,0～0.006 mg·L-1,0.025～8.459 mg·L-1,0～0.035 mg·L-1,0～0.001 mg·L-1 respectively.The concentrations of heavy metals of most samples were lower than the limited values of drinking water standard of China and EPA.However,Fe concentrations of 2 samples and Zn concentrations of 3 samples exceed drinking water standard of China and EPA.Correlation analysis demonstrated that Zn and Fe,Cr,and Pb showed a significant correlation in pairs,which suggest Zn and Fe,Cr and Pb have similar sources or transfer path in the study area.The spatial differentiations of 6 heavy metal concentrations were large with a character of patchy distribution,suggesting their concentrations may be influenced by human activities.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2013年第1期127-134,共8页
Journal of Agro-Environment Science
基金
中国科学院"百人计划"项目
关键词
地下水
重金属
相关性分析
空间分布
来源分析
groundwater
heavy metal
correlation analysis
spatial distribution
pollution sources
