2005年山东省济宁市地方性氟中毒病区水氟和改水降氟工程调查

目的 了解2005年山东省济宁市地方性氟中毒(简称地氟病)病区的水氟分布和改水降氟工程的现状.方法 在济宁市选择有地氟病的任城区、梁山县和嘉祥县进行饮用水氟筛查和改水降氟工程运行情况调查,采用氟离子选择性电极法测定水氟.结果 共筛查了671个村,饮水含氟量≤1.00 mg/L的村为170个(占25.34%),>1.00 mg/L的村为501个(占74.66%),水氟最高为11.33 mg/L.共检测改水降氟工程497处,其中报废工程161处(占32.39%),正常运行工程334处(占67.20%),间歇运行工程2处(占0.40%).正常和间歇运行的 336处改水降氟工程.饮水含氟量≤1.00 mg/L的工程为281处(占73.18%),>1.00 mg/L的工程为55处(占26.82%),最高为4.28mg/L.结论 济宁市地氟病防治形势仍然十分严峻,须尽快落实防治措施和加强改水降氟工程的监测和管理工作.

Investigation on water fluoride content and water-improving defluoridation projects in endemic fluorosis areas in Jining City, Shandong Province in 2005

Objective To investigate water fluoride content and the current status of water-improving project in Jining,Shandong Province in 2005.Methods Water fluoride content and the status of water-lmprovlng project were havestigated in Bencheng Ditrict,Liangshan and Jiaxiang Couties of Jining City.The fluoride content in drinking warer was assessed by F-ion selective electrode.Results Water fluoride contents of 671 fluorosis villages were determined.One hundred and seventy villages had water fluoride content less than or equal to 1.00 mg/L(accounting for 25.34%)and 501 villages water fluoride content higher that 1.00 mg/L(accounting for 74.66%),with the highest being 11.33 mg/L.Four hundred and ninty.seven projects were surveyed,in which 161 Projects were discarded (accounting for 32.39%),334 projeets worked well(accounting for 67.20%),and 2 pmjects worked fitfully(accounting 0.40%).Two hundreds and eighty-one projects had water fluoride content≤1.00 ms/L and 55 projects had water fluofide cantent>1.00 mg/L(aceounting for 26.82%),with the highest being 4.28 ms/L.Conclusions The situation of endemic fluorosis control is still serious in Jining City.Countermeasures for endemic fluorosis must be carried out as sppm as possible and surveillance of water-improving and defluoridation projects must be strevIsthend.