通过对9个燃煤型氟病区儿童发样硒含量测定,病区儿童发硒水平普遍较高,个别地区如巫山县建坪乡发硒高达6.9813μg/g),其居民主食硒含量比其它地区玉米高5—40倍,可能与煤烟污染内外环境有关。使用这种高硒粮,推算每人平均每日硒摄入量达362.8μg。此外,燃煤可直接污染头发,也是造成氟病区儿童发硒高的另一个原因。 Selenium content in children of nine coal-burning fluorosis areas was higher than that in other areas. Selenium levels in ward children were generally higher than those in other districts (Jiancun Township, Wushan County, 6.9813μg / g) 5-40 times higher in maize area, which may be related to the soot pollution inside and outside the environment. The use of such high-se grain, estimated average daily intake of selenium up to 362.8μg. In addition, burning coal can directly pollute the hair, but also another cause of high selenium in children with fluoride disease.