| abstract |
The invention relates to a preparation method of a composite ceramic material for removing mercury in waste water and sewage, which comprises the steps of soaking a magnesium oxide slurry and a mixed slurry containing manganese oxide (the content is 5-8 wt%), magnesium oxide (the content is 5-10 wt%), copper powder (the content is 0.5-1 wt%) and cerium oxide (the content is 3-5 wt%) in polyurethane with a mesh or honeycomb structure, then roasting at high temperature, and finally soaking in a potassium permanganate aqueous solution to prepare a porous magnesium oxide based composite material. The composite ceramic provided by the invention has the advantages of large surface area, strong permeability, high bactericidal capacity, scouring resistance, environmental friendliness and the like, can be regenerated, is simple and easy to recover mercury, cannot cause secondary pollution, and has simple preparation process, low cost, good application potential and good social and economic benefits. |