2013-2014年鄂尔多斯市、榆林市十区县直饮水、水源水和末梢水中汞监测数据分析

Monitoring data analysis of mercury in direct drinking water,source water and Tap water in ten districts of Ordos and Yulin in 2013-2014

目的通过对鄂尔多斯市、榆林市十区县水源水、末梢水和直饮水中汞含量监测数据分析,探寻鄂尔多斯高原及其周边地区饮用水汞含量现状和变化规律,为饮用水中重金属引起中毒事件防控工作提供有力的科学依据。方法采用AFS-230E双道原子荧光光度计对该区域68份水源水、220份末梢水和32份直饮水样本进行统计分析。结果本研究统计了2013-2014年鄂尔多斯市各旗区以及榆林市的神木、府谷二县饮用水样本320份其中末梢水220份,水源水68份,直饮水32份,只有一份水源水样品汞含量超标,其余所有样品都符合国标要求,其中水源水汞检出率为67.65%,末梢水汞检出率为45.91%,直饮水汞检出率为65.63%。320份样品中,水源水、末梢水以及直饮水含汞量均值分别为0.163μg/L、0.12μg/L以及0.148μg/L。鄂尔多斯市榆林市十县4~6月份水源水样品含汞量均值为0.147μg/L,7~9月份水源水样品含汞量均值为0.233μg/L,而10~12月水源水样品含汞量均值为0.1μg/L。结论夏季水源水汞含量高于其它时间段。由水源水、末梢水以及直饮水汞含量均值比较以及汞检出率结果可以看出由于自来水公司对水质的净化操作,末梢水中汞含量明显低于水源水。

Objective To analyze mercury in direct drinking water, source water and Tap water in ten districts of Ordos and Yulin in order to explore the trend of the mercury of drinking water of Ordos plateau and its surrounding areas and provide scientific basis for the prevention and control of heavy metal poisoning events in drinldng water. Methods 68 samples of sources water, 220 samples of tap water and 32 samples of direct drinking water samples were analyzed by AFS-230E dual channel atomic fluorescence photometer. Results In 2013-2014 we detected 320 samples, there was only one source water sample exceed the standard, and the other samples are in line with the national standard requirements. The detection rate of mercury in source water was 67.65%, 45.91% in Tap water, and 65.63% in direct drinking water. In the 320 samples, the average content of mercury in source water, tap water and direct drinking water was respectively 0.163 g/L, 0.12 g/L and 0.148 g/L. The average content of mercury in source water of 4~6 month water, 7-9 months and 10-12 months was respectively 0.147 g/L, 0.233 g/L, and 0. lg/L. Conclusion The mercury content in summer is higher than other time. From the results of the mercury content and mean detection rate of mercury of source water, tap water and direct drinking water results, we could see that the mercury content of tap water was significantly lower than that of source water.