乌兰布和沙漠位于内蒙古西部,是我国八大沙漠之一,为典型的大陆性干旱气候。研究表明乌兰布和沙漠地下水中氟离子含量大部分都超过饮用水标准,氟离子主要来源于沙漠中含氟量较高的矿物,高氟水的分布与其干旱的气候、四周高中间低的地形及地下水流径流条件有关。此外,当地下水中(K++Na+)/(Ca2++Mg2+)比值小时,水中F-含量也相应较少,反之当水中(K++Na+)/(Ca2++Mg2+)比值大时,F-含量就会增多。 Located in western Inner Mongolia, the Ulan Buh Desert is one of the eight major deserts in China with a typical continental arid climate. The study shows that most of the fluoride ion in groundwater in the Ulan Buh Desert has exceeded the drinking water standard. The fluoride ion mainly comes from the minerals with high fluoride content in the desert. The distribution of high-fluorine water and its arid climate are low Topography and groundwater flow runoff conditions. In addition, when the ratio of (K + + Na +) / (Ca2 + + Mg2 +) in the local water is small, the content of F- in the water is correspondingly lower, whereas when the ratio of (K ++ Na +) / F-content will increase.