郭占景, 杨玲, 范尉尉, 赵伟, 白萍, 陈风格, 梁建伟, 李贺. 河北省某县饮用水硝酸盐污染现状调查及评价[J]. 环境与职业医学, 2013, 30(6): 447-449.
引用本文: 郭占景, 杨玲, 范尉尉, 赵伟, 白萍, 陈风格, 梁建伟, 李贺. 河北省某县饮用水硝酸盐污染现状调查及评价[J]. 环境与职业医学, 2013, 30(6): 447-449.
GUO Zhan-jing , YANG Ling , FAN Wei-wei , ZHAO Wei , BAI Ping , CHEN Feng-ge , LIANG Jian-wei , LI He . Evaluation on Nitrate Contamination Status of Drinking Water in a County of Hebei Province[J]. Journal of Environmental and Occupational Medicine, 2013, 30(6): 447-449.
Citation: GUO Zhan-jing , YANG Ling , FAN Wei-wei , ZHAO Wei , BAI Ping , CHEN Feng-ge , LIANG Jian-wei , LI He . Evaluation on Nitrate Contamination Status of Drinking Water in a County of Hebei Province[J]. Journal of Environmental and Occupational Medicine, 2013, 30(6): 447-449.

河北省某县饮用水硝酸盐污染现状调查及评价

Evaluation on Nitrate Contamination Status of Drinking Water in a County of Hebei Province

  • 摘要: 目的 了解河北省某县饮用水硝酸盐污染状况。

    方法 采取分层随机抽样的方法在该县13 个乡(镇)抽取100 个监测点, 采用统一的调查表对监测点的水源类型、供水方式、水源污染状况及覆盖人口等进行调查, 在2012年枯水期(5 月)和丰水期(7 月)采集检测354 份水样, 按照GB 5749-2006《生活饮用水卫生标准》进行评价。

    结果 该县饮用水硝酸盐含量平均值为18.32 mg/L, 31.64%水样硝酸盐含量超过规定限值(20 mg/L); 枯水期出厂水、末梢水硝酸盐含量高于丰水期; 枯水期出厂水硝酸盐超标率高于丰水期(P < 0.05); 集中式供水出厂水和末梢水硝酸盐含量低于用户储存水(P < 0.05); 用户储存水(分散式供水)硝酸盐超标率高于末梢水和出厂水(P < 0.05); 上寨乡饮用水硝酸盐超标率最高(100.00%), 其次为白鹿泉乡(66.66%), 上庄镇未超标; 丰水期实施饮水安全工程的饮用水硝酸盐含量、硝酸盐超标率低于尚未实施的(P < 0.05)。

    结论 该县饮用水硝酸盐污染较重, 应加强含氮有机物的污染治理。

     

    Abstract: Objective To evaluate nitrate contamination status of drinking water in a county of Hebei Province.

    Methods Stratified random sampling method was used to select 100 monitoring spots from 13 villages (towns) in Hebei. Type of water source, mode of water supply, pollution condition of water sources, and covered population were investigated by a self-designed survey form. A total of 354 water samples were collected and tested during the dry season (May) and the rainy season (July) in 2012. All assessments followed the Sanitary Standards for Drinking Water Quality (GB 5749-2006).

    Results The average concentration of nitrate in the sampled drinking water was 18.32 mg/L, and 31.64% samples exceeded the sanitary limit for drinking water quality (20 mg/L). The nitrate concentrations and the unqualified rates in finished water & tap water in the dry season were higher than those in the rainy season (P < 0.05). The nitrate concentrations and the unqualified rates in finished water & tap water from the centralized water supply system were lower than that in the reservoir water (non-central water supply) (P < 0.05). The unqualified rate of nitrate concentration was highest in the samples of Shangzhai Town, followed by Bailuquan Town, and all water samples in Shangzhuang town were qualified. In the rainy season, the concentrations and the unqualified rates of nitrate in the regions implementing the safe drinking water project were lower than those without (P < 0.05).

    Conclusion The selected county presents severe nitrate contamination in drinking water, and requires a strengthened remediation to control the nitrate pollution.

     

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