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为了解云南洱源县牛街乡的改水降氟效果,于2014年1月,选择附近有温泉水分布的牛街乡牛街小学(简称“中心完小”)且在当地出生的8~12岁在校儿童进行氟斑牙检查;于2014年6月,采集患氟斑牙儿童的即时尿样测定氟浓度,采集牛街乡饮用温泉水(n=4)、浅层井水(n=2)及其改水后市政自来水(n=2)水样测定氟浓度。结果显示,温泉水和浅层井水水样中的氟浓度均超标,仅市政自来水合格。共检查牛街中心完小8~12岁儿童213例,氟斑牙检出率为31.46%,且8岁儿童未检出氟斑牙;仅检出轻、中度氟斑牙;未检出重度氟斑牙。共检测氟斑牙儿童尿样55件,尿氟平均浓度为0.861mg/L,中位数为0.72 mg/L,范围为0.22~2.46 mg/L;尿氟浓度正常(≤1.67 mg/L)的占92.73%。提示云南洱源县牛街乡改水降氟效果明显,但仍存在氟中毒现象,说明有其他氟摄入途径,需作进一步研究。
In order to understand the water-reducing and fluoride-reducing effects of Niujie Township, Eryuan County, Yunnan Province, in January 2014, 8 Niujie Township Niujie Primary School (Niujiewanzi Elementary School) Dental fluorosis test was performed on children aged from 12 to 12 years old. In June 2014, fluorine concentration of instant urine samples collected from children with dental fluorosis was measured. Niujie Township drinking hot spring water (n = 4), shallow well water n = 2) and municipal tap water after water change (n = 2). The results show that both the hot spring water and the shallow well water samples have exceeded the fluorine concentration, only municipal tap water pass. A total of 213 children aged 8-12 years old were examined in the center of Niujie Street, the detection rate of dental fluorosis was 31.46%, and dental fluorosis was not detected in 8-year-old children; only mild and moderate dental fluorosis was detected; Dental fluorosis A total of 55 urinary samples from children with dental fluorosis were tested. The average urinary fluoride concentration was 0.861 mg / L, with a median of 0.72 mg / L and a median of 0.22-2.46 mg / L. Urinary fluoride concentrations were normal (≤ 1.67 mg / L) Accounted for 92.73%. It suggested that Niujie Eui County Niujie Township Township Township water fluoride reduction effect is obvious, but there is still fluoride poisoning, indicating that there are other ways of fluorine intake, need further study.