利用镁盐絮凝剂处理含氟地下水的研究

Treatment of Groundwater Containing Fluoride with Magnesium Flocculants

研究了镁盐絮凝剂对含氟地下水的处理效果。试验结果表明,单独投加氧化钙粉末不能有效去除含氟地下水中的氟,而且投加量过大会产生大量沉淀,而投加镁盐絮凝剂与氧化钙粉末联合处理,除氟效果较好。当镁盐絮凝剂投加量为0.8%,氧化钙粉末调节pH=11,搅拌时间为5 min时,氟离子去除率达到93%,出水氟离子浓度达到我国饮用水卫生标准。此方法处理效果好,不会造成二次污染,在国内未见报道。

This paper studied the treating effect of groundwater containing high fluoride with magnesium flocculants.The experimental results showed that,calcium oxide powder alone failed to effectively remove fluorine in fluoride groundwater,and excessive dosage of calcium oxide powder results in sediment.But combination of magnesium flocculants and calcium oxide powder can effectively remove fluorine.when at normal temperature,the dosage ratio of magnesium flocculants is 0.8%,and calcium oxide powder is regulated pH=11,stir 5min,and then fluorine removal rate can reach 93%,the concentration of fluorine ion in the groundwater is up to the national sanitary standard for drinking water.This method,efficient and no secondary pollution,has not been reported in China.