Method for preparing magnesium-iron hydrotalcite by using metal ions in industrial wastewater

The invention discloses a method for preparing magnesium-iron hydrotalcite by utilizing metal ions in industrial wastewater, which is characterized in that the magnesium-iron hydrotalcite is prepared by regulating and controlling the ion composition in the wastewater by adding iron salt into high-salt industrial wastewater raw materials, so that the content of metal ions and the content of COD (Chemical Oxygen Demand) in the wastewater can be effectively reduced; wherein the removal rate of calcium and magnesium ions in the industrial wastewater can reach 88%, the removal rate of COD (Chemical Oxygen Demand) can reach 45%, and the highest removal rate of TOC (Total Organic Carbon) can reach more than 50%. The prepared magnesium-iron hydrotalcite-like compound can be further applied to the field of environmental pollution treatment, the problem of industrial wastewater pollution treatment is solved, meanwhile, the preparation cost of the hydrotalcite-like compound is reduced, and the prepared magnesium-iron hy