安徽北部农村地区地下水重金属含量特征及水质评价

Content Characteristic and Quality Assessment of Heavy Metals in Groundwater of Rural Areas,North Anhui Province

以安徽北部农村地区地下水为研究对象,随机采集了26个地下水样品,测试分析Cd,Cr,Cu,Zn,Pb,Ni和Mn七种重金属,对其含量特征和水质状况开展研究。结果表明:1个采样点的内梅罗污染指数为0.7719,出现了轻度的重金属污染;5个采样点出现了单项重金属Mn,Ni和Pb含量超标,但其综合水质尚可达标;20个采样点地下水符合《生活饮用水卫生标准》(GB5749-2006)中的Ⅲ类水质标准,适用于日常生活饮用水水源及工、农业用水。通过对安徽北部农村地下水水质现状的研究,可为掌握研究区农民饮水安全状况提供参考。

This paper takes rural areas in the North Anhui province as the study object, in which twenty-six groundwater samples were randomly collected. To make a detailed analysis of content characteristics, seven kinds of heavy metals （ Cd, Cr, Cu, Zn, Pb, Ni and Mn） were determined, and the water quality was also analyzed. The result shows that, in one sit, the Nemerow Pollution Index of water quality is 0. 7719, which belongs to mild heavy metal pollution, and in five sits, the contents of single heavy metal, such as Mn, Ni, and Pb exceed groundwater quality guidelines, however, the comprehensive water quality still can meet national standard; and in twenty sits, the groundwater conforms to the Drinking water health stand-ards （ GB5749 -2006 Ⅲ） , which means it can be directly used as the sources of drinking water, industrial water and agricul-tural water in people＇s daily lives.