摘要
目的了解2012-2018年渭南市生活饮用水中六价铬的污染现状和变化趋势,为六价铬污染治理提供参考依据。方法2012-2018年,在陕西省渭南市全部区县开展生活饮用水卫生学调查和水质分析,并对监测数据进行分析。结果2012-2018年共监测水样5236份,六价铬合格水样5074份,合格率为96.91%。2013-2018年生活饮用水中六价铬合格率比较,差异无统计学意义(P>0.05),但均高于2012年合格率(92.95%)。不同区域合格率比较,差异有统计学意义(P<0.01),其中六价铬合格率低的区域主要集中在富平县504份(94.74%)、临渭区739份(93.31%)和潼关县233份(92.46%)。不同水源中,地下水的深井六价铬合格率较低,为96.26%(3941份)。不同的供水方式六价铬合格率比较,差异有统计学意义(P<0.01),其中未处理的水样合格率较低为93.20%(1659份)。结论2012-2018年渭南市生活饮用水中六价铬超标应引起重视,可通过加大水源保护力度、寻找新的水源和提高水处理能力等来提高水质。
Objective To investigate the current situation and variation trend of hexavalent chromium pollution in drinking water of Weinan City from 2012-2018,provide scientific basis for the treatment of hexavalent chromium pollution.Methods From 2012-2018,hygienic investigation and water quality analysis were carried out in all districts and counties of Weinan City in Shaanxi County,and the monitoring data were analyzed.Results Totally 5236 water samples were tested,and 5074 were qualified samples of hexavalent chromium,with the qualified rate of 96.91%.There was no statistically significant difference in the qualified rate of hexavalent chromium among years of 2013-2018(P>0.05),while the annual qualified rate was higher than that in 2012(92.95%).There was statistically significant difference in the qualified rate among different regions(P<0.01),and the regions with lower qualified rate were mainly concentrated in Fuping Count y(504 samples,94.74%),Linwei District(739 samples,93.31%)and Tongguan County(233 samples,92.46%).Fro the different water sources,the samples with lower qualified rate of hexavalent chromium were mainly distributed in the deep wells of groundwater,which was 3941 samples(96.26%).There was statistically significant difference in the qualified rate of hexavalent chromium among different water supply modes,and the qualified rate of untreated water sample was the lowest(1659 samples,93.20%).Conclusion It is necessary to pay attention to the excessive hexavalent chromium in drinking water of Weinan City from 2012-2018.Water quality can be improved by strengthening water source protection,finding new water sources and improving water treatment capacity.
作者
杨云云
刘腾
焦莉萍
苗美荣
沈托
YANG Yun-yun;LIU Teng;JIAO Li-ping;MIAO Mei-rong;SHEN Tuo(Clinical Laboratory,Weinan City Center for Disease Control and Prevention,Weinan Shaanxi,714000,China)
出处
《职业与健康》
CAS
2019年第23期3264-3267,共4页
Occupation and Health
基金
中央公共卫生服务补助资金(2012—2018)(2100409-重大公共卫生专项)
关键词
生活饮用水
六价铬
监测
合格率
铬污染
drinking water
Hexavalent chromium
Monitoring
Percent of pass
Chromium pollution
