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以实验研究的方法探讨氧化镁（ＭｇＯ）降低饮水氟含量的效能和影响因素，为进一步开发ＭｇＯ饮水降氟提供基础数据。实验证实ＭｇＯ具有明显的饮水降氟作用，其在一定时间内降氟率与加入量呈正相关。混凝法降氟时ＭｇＯ投加量为水氟含量的５００～１０００倍为宜。２４小时内可使水氟下降８０％以上，随时间延长降氟效率逐渐增加，最终可降氟９８％以上。加热煮沸可降低ＭｇＯ的用量并使降氟速度加快，水的ｐＨ增高可降低ＭｇＯ降氟率。水中ＣａＣＯ３含量在９００ｍｇ／Ｌ以下时对ＭｇＯ降氟效率无明显影响。降氟后饮水中氟含量在１ｍｇ／Ｌ以下，且有一定量镁离子残留，这对提高病区人群抗病能力和氟中毒的防治可能有良好作用，因此ＭｇＯ降氟有推广应用价值
The effects of magnesia (MgO) on the fluorine content in drinking water and the influencing factors were investigated experimentally to provide the basic data for further developing the water-reducing MgO drinking water. Experiments confirmed that MgO has significant water fluoride effect, and its rate of fluorine reduction in a certain period of time was positively correlated with the addition amount. When the coagulation method to reduce the dosage of MgO water fluoride content of 500 to 1000 times is appropriate. Fluoride can reduce water fluoride by more than 80% within 24 hours. With the passage of time, the fluorine reduction efficiency will gradually increase, and the fluoridation rate will eventually be reduced by more than 98%. Heating boil can reduce the amount of MgO and make fluoride speed, water pH increases can reduce the rate of MgO fluoride. When the content of CaCO3 in water is below 900mg / L, there is no obvious effect on the fluorine reduction efficiency of MgO. Fluorine content in drinking water below 1mg / L, and a certain amount of residual magnesium ions, which improve disease resistance in ward and fluoride poisoning prevention and treatment may have a good effect, so the promotion of the use of MgO fluoride value