The depth removal effects and mechanism for the removal of 1mg/L of the of phosphorus with scraped alkali modified autoclaved aerated concrete materials for phosphorus removal in wastewater are studied.Results show that after the modified by 0.5mol/L of NaOH,0.4g/50 ml of the materials can reach 99.18% of the phosphorus removal efficiency in 30 minutes.X-ray fluorescence analysis shows that the materials contain a large number of silicon,calcium,aluminum and iron oxides,and after the modification by NaOH,pr...