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介绍了氧化铁涂层砂和未涂层石英砂除氟过滤比较：氧化铁涂层砂除氟效果显著，去除率达９０ ％ 以上，基本遵循低ｐＨ 高去除率的规律；石英砂对水中的氟无任何去除效果。
The comparison of fluoride removal between iron oxide coated sand and uncoated quartz sand shows that the removal rate of iron oxide coated sand is more than 90%, basically following the rule of low pH and high removal rate. The effect of quartz sand on water Fluoride without any removal effect.