Preparation of polymeric aluminum ferric sulphate from waste residue of aluminum industry

Polymeric aluminum ferric sulphate(PAFS) was prepared from high-sulfur bauxite flotation tailings and red mud by roasting, acid leaching polymerization. The effects of temperature, time, liquid-solid ratio on the rate Al3+ Fe3+were investigated. optimal conditions are as follows: temperature 100℃, time 90 min, sulfuric concentration 4.5mol/L 5 mg/L. Infrared spectroscopy X-ray diffraction analysis carried out PAFS under optimum process parameters. characterization shows that synthesized had polymeric aluminum, iron hydroxyl structures. Wastewater disposal test synthetic removal rates COD, turbidity chromaticity 45.61%, 75% 94.18%, respectively.