采用共沉淀-煅烧法制备Mg-Al-Zr金属复合物，并用扫描电镜和X射线衍射对其进行表征，考察了吸附剂质量浓度、吸附时间、pH、初始氟质量浓度和共存阴离子对除氟影响。结果表明，在初始溶液pH=4~10，吸附剂质量浓度为3 g/L，氟初始质量浓度为40 mg/L时，对溶液中的氟去除效果最佳，吸附平衡时间为300 min。等温吸附数据分析显示其等温吸附特征可用Langmuir等温吸附方程描述，由其计算饱和吸附量为48.90 mg/g。共存阴离子对吸附材料除氟效率影响力大小为：PO₄^2- > CO₃^2- > SO₄^2- > NO₃^-。吸附剂再生循环3次后，除氟效率仍在70%以上。

Mg-Al-Zr composite oxides are synthesized by co-precipitation and calcinations methods.The sample is then characterized by SEM and XRD.The effects of adsorbent dose,adsorption time,pH value,initial fluorine concentration and coexisting anions (PO₄^3-,SO₄^2-,CO₃^2-,NO₃^-) on the removal of fluorine by Mg-Al-Zr composite oxides are determined.The results show that the optimal conditions for removing fluorine are as follows:solution initial pH is in the range of 4-10,the mass concentration of Mg-Al-Zr composite oxide is 3 g·L^-1,and the initial concentration of fluorine is 40 mg·L^-1.The adsorption equilibrium time is about 300 minutes.The adsorption isotherm characters of Mg-Al-Zr composite oxide fits well the Langmuir models,and the maximum adsorption capacity of fluorine calculated by Langmuir model is as high as 48.90 mg·g^-1.The effects of coexisting anions on removal of fluorine by adsorbent drop in the order of PO₄^2- > CO₃^2- > SO₄^2- > NO₃^-.After three recycle of adsorption-desorption,this adsorbent can still achieve more than 70% of removal rate for fluorine.