临猗县饮水含氟量回升原因调查

Investigation on the reason of re-increase of fluorid in drinking water in Linyi county

目的 探讨临猗县水氟回升原因。方法 对该县坡下原地方性氟中毒病区自然村井深、封闭深度、成井时间调查 ,并采水化验水氟浓度。结果 水氟回升主要是≤ 1.0mg/L水井回升到 1.1～ 1.2mg/L。水井封闭深度、封闭质量和使用时间都是影响水氟回升的原因。结论 封闭深度在 10 0m以上 ,使用时间在 15年以内的水井 ,降氟效果最佳。

Objective Research the reason of re-increase of fluorid in drinking water in Linyi county.Methods Collect all the data such as the depth of the wall,the sealed depth of the wall,the time of the wall dug and test the concentration of fluorid in drinking water in every nature village in the original endemic fluorosis attacked area in this county.Results The fluorid in drinking water re-increase from less than 1.0 mg/L to 1.1 till 1.2 mg/L in Linyi county.The influence infectors include the sealed depth of the wall,the quality of the seal and the time of the wall used.Conclusions For reduce the fluorid in drinking water,it is best to insure the sealed depth of the wall more than 100m,and used less than 15 years.