摘要
目的掌握天津市调查区县降氟改水工程运行现状,为进一步改水降氟提供科学依据。方法选择代表性较强的武清区、大港区、塘沽区、津南区、西青区、北辰区、宝坻区和静海县作为监测区县,以降氟改水工程为单位,对每个运转的改水降氟工程检测水源水和末梢水的水氟含量,对报废的改水工程检测水源水的水氟含量。结果共调查降氟改水工程875座,覆盖1 022个自然村,采集并检测水氟样品2 326份。正常或间歇运转的工程共有673个,占76.9%;报废工程202个,占23.1%。正常或间歇运转工程的主要改水形式是打深井,占56.9%(383/673);其次为理化降氟,占37.0%(249/673)。改水降氟工程合格率较高的区县为北辰、静海、大港、西青,合格率分别为95.7%、91.3%、91.3%、78.6%。北辰、大港、津南、静海末梢水氟含量均低于水源水,经t检验,差异有统计学意义(均P<0.01)。采用理化降氟的末梢水氟含量低于水源水,经秩和检验,差异有统计学意义(Z=11.70,P<0.01)。报废工程的水氟含量均>1.0 mg/L,其中中等病区最多(157个,占77.7%)。结论报废工程应重新进行改水,对正在运转的工程应继续做好水质监测,并适时对工程进行改进。
Objective To investigate the running state of fluoride - lowering well - digging projects in Tianjin so as to provide scientific basis for water improvement in future. Methods Eight counties were selected in representatively prevailed areas and the fluoride concentration was surveyed according to the project. Results The normal and pause operation rate of projects was 76. 9%, and the major formats of water improvement for these projects were fluoride - lowering well - digging and physical - chemistry projects. The fluoride - lowering degree of the projects was significant, and the lowering in physical - chemistry projects was the most significant. Water fluoride of scrapped projects was high. Conclusion Water improvement for the scrapped projects should be carried through. Water monitoring and improvement for the normal and pause operation projects should be carried out.
出处
《中国卫生工程学》
CAS
2007年第4期193-195,共3页
Chinese Journal of Public Health Engineering
基金
中央补助地方公共卫生专项资金地方病防治项目(2004)
关键词
饮水
氟
卫生调查
Drinking
Fluoride
Health survey
