徐建军, 徐迎春, 王松松, 于桂梅. 烟台市农村地区集中式生活饮用水硝酸盐污染现状[J]. 环境与职业医学, 2017, 34(12): 1072-1075. DOI: 10.13213/j.cnki.jeom.2017.17330
引用本文: 徐建军, 徐迎春, 王松松, 于桂梅. 烟台市农村地区集中式生活饮用水硝酸盐污染现状[J]. 环境与职业医学, 2017, 34(12): 1072-1075. DOI: 10.13213/j.cnki.jeom.2017.17330
XU Jian-jun, XU Ying-chun, WANG Song-song, YU Gui-mei. Nitrate pollution of centralized drinking water system in rural areas of Yantai City[J]. Journal of Environmental and Occupational Medicine, 2017, 34(12): 1072-1075. DOI: 10.13213/j.cnki.jeom.2017.17330
Citation: XU Jian-jun, XU Ying-chun, WANG Song-song, YU Gui-mei. Nitrate pollution of centralized drinking water system in rural areas of Yantai City[J]. Journal of Environmental and Occupational Medicine, 2017, 34(12): 1072-1075. DOI: 10.13213/j.cnki.jeom.2017.17330

烟台市农村地区集中式生活饮用水硝酸盐污染现状

Nitrate pollution of centralized drinking water system in rural areas of Yantai City

  • 摘要: 目的 调查烟台市农村地区集中式生活饮用水中硝酸盐污染现状,分析污染来源。

    方法 2014-2016年按照GB/T 5750-2006《生活饮用水标准检验方法》对烟台市12个涉农县、市、区3 705个农村小型集中式供水单位的出厂水和末梢水在枯、丰水期进行采样和检测,采集水样10 644份,运用Excel 2003和SPSS 11.5对硝酸盐的监测结果进行统计分析。

    结果 烟台市农村集中式生活饮用水中硝酸盐质量浓度均值为26.31 mg/L。按GB 5749-2006《生活饮用水卫生标准》中规定限值(≤20 mg/L)进行评价,硝酸盐超标率为46.91%。水中硝酸盐的超标率在枯水期(46.93%)、丰水期(46.89%)的差别无统计学意义(P>0.05);出厂水(46.92%)和末梢水(46.89%)硝酸盐超标率的差别也无统计学意义(P>0.05)。饮用水中硝酸盐含量及超标率较高地区均分布在烟台的中西部。

    结论 烟台市农村集中式生活饮用水硝酸盐污染严重,分布呈现一定的区域性。

     

    Abstract: Objective To investigate nitrate pollution of drinking water distributed by centralized treatment systems in rural areas of Yantai City, and analyze pollution sources.

    Methods According to Standard sampling and testing methods for drinking water (GB/T 5750-2006), 10 644 samples of finished water and tap water from 3 705 small centralized water supplies in 12 agricultural counties/county-level cities/districts of Yantai City were collected in all dry seasons and wet seasons during the period of 2014-2016.Excel 2003 and SPSS 11.5 were used for statistical analysis on the monitoring results of nitrate.

    Results The average concentration of nitrate in drinking er in selected rural areas of Yantai was 26.31 mg/L.According to the limits of nitrate ≤20 mg/L in Drinking water health standards (GB 5749-2006), the unqualified rate of nitrate was 46.91%.There was no difference in the qualified rates of nitrate between dry season (46.93%) and wet season (46.89%) (χ2=0.0015, P>0.05), nor between finished water (46.92%) and tap water (46.89%) (χ2=0.0008, P>0.05).The rural areas with high unqualified rates of nitrate were concentrated in midwest of Yantai.

    Conclusion A heavy nitrate pollution of drinking water is identified in rural areas of Yantai city, showing a regional distribution.

     

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