高氟区改水后儿童氟负荷水平研究

STUDY ON FLUORINE LOAD LEVELS OF CHILDREN IN AREAS WITH HIGH FLUORINE EXPOSURE AFTER DEFLUORINATION

本研究选择3个地区(1区饮用含氟2.0mg/L以上的地下水,作对照。2区饮用除氟后的地下水,水氟含量同1区。3区饮用含氟1.0mg/L以下的地面水。)进行了环境(饮水和食物)氟监测,儿童尿氟测定和斑釉齿患病率调查。结果显示,饮用低氟河水8年后的儿童尿氟和斑釉齿患病率明显低于对照区(P<0.05)。活性氧化铝降氟区儿童斑釉齿患病率明显下降(P<0.05),但尿氟水平变化不大。

This study was performed in 3 areas (Ⅰ area supplied by ground water containing fluorine more than 2 mg/L, as control area, Ⅱ area supplied by defluorinated ground water mentioned above, Ⅲ area supplied by surface water with low level of Fluorine less than 1 mg/L instead of hign Fluorine ground water.) In this selected areas were carried out some monitoring Fluorine levels in the environment of drinking water and foodstuff. At the same time Fluorine in urine and prevalence rate of mottled tooth in children in related areas were measured. The results showed that Fluorine concentrations in urine and prevalence rate of mottled tooth in children taking drinking water from low fluorine content surface water more than 8 years were decreased significantly (P<0. 05) compared with control area prevalence rate of mottled tooth in area using defluorinated drinking water above 8 years by active Aluminium oxide was also decreased (P<0. 05), but concentrations of Fluorine in urine were not significantly changed. Presented results would be useful to selecte methods and effects of measures for defluorinating from drinking water.