Preparation method and application of high-efficiency defluorinated aluminum-iron composite reagent

The invention discloses a preparation method and application of a high-efficiency defluorinated aluminum-iron composite reagent. Aluminum salt and iron salt are subjected to polymerization reaction under acidic conditions to prepare the aluminum-iron composite reagent. When the obtained aluminum-iron composite reagent is used for treating fluorine-containing wastewater, the concentration of fluorine ions in the wastewater can be stabilized to be 1mg/L or lower, and type III water standard requirements in environmental quality standards for surface water (GB3838-2002) can be met. The preparation method of the aluminum-iron composite reagent is mild in conditions and low in cost; the aluminum-iron composite reagent is obvious in effect when being used for treating the fluorine-containing wastewater; and the aluminum-iron composite reagent is simple in technology, is time-saving and labor-saving and has good application prospects. 本发明公开了种高效脱氟铝铁复合试剂的制备方法及应用。利用铝盐和铁盐在酸性条件下发生聚合反应制备铝铁复合试剂，由此得到的铝铁复合试剂用于处理含氟废水，能使废水中的氟离