钟祥市饮用井水重金属含量现况调查与分析

Survey on heavy metal of drinking well water in Zhongxiang

目的:了解钟祥市饮用井水重金属(Fe、Cu、Mn、Pb、As)含量,为当地生活饮用水管理提供科学依据。方法:按照中国国家生活饮用水卫生标准和生活饮用水标准检验方法,随机抽取钟祥市13个乡镇监测点267份井水进行重金属检测和评价。结果:钟祥市井水铁的中位水平为0.37(0.13～1.19 mg/L)、超标率为54.7%,锰为0.15(0.03～0.73 mg/L)、超标率为56.93%,各监测点间水样中铁、锰含量及超标率差异均有统计学意义,P<0.01。1.12%的水样As超标,Cu和Pb均未超标。结论:钟祥市井水中铁、锰超标现象严重,需要高度重视。

Objective： We assessed the heavy metal（Fe,Cu,Mn,Pb,As） content of Zhongxiang City（Hubei,China） drinking water to provide scientific basis for efficient management of local drinking water.Methods：We randomly selected 267 samples of well water from 13 country monitor sites,and analyzed heavy metal content by the standard method specified in the Chinese National Sanitary Standard of Drinking Water.Results：In Zhongxiang City,the mean Fe content is 0.37（0.13～1.19 mg/L）,over limit rate is 54.7%,Mn 0.15（0.03～0.73 mg/L）,over limit rate 56.93%;there was a significant difference in Fe and Mn content and over limit rate between different monitor sites（P〈0.01）.In 1.12% of all tested samples,As content is over limit.The content of Cu and Pb is normal in all tested samples.Conclusion：There is a severe problem of Fe and Mn content over limit in Zhongxiang City drinking water,which should be taken seriously.