Application of modified waste cement blocks in removal of phosphorus in rainwater

The invention discloses application of modified waste cement blocks in removal of phosphorus in rainwater. The modified waste cement blocks are prepared by the method comprising the following steps: mixing 1 mol/L of iron salt solution, 0.5 mol/L of an aluminium salt solution and 1 mol/L of a sodium hydroxide solution at a normal temperature at a ratio of 1: 1: 5.4; adding pretreated waste cementblocks; enabling the solid-liquid ratio of a mixed solution and brick blocks to be 1: 3; mixing by using a constant-temperature oscillator at the normal temperature; taking out the cement blocks 4 h later; drying the cement blocks in an oven and firing with a muffle furnace; taking out the cement blocks; and cleaning the cement blocks with distilled water. The method has the characteristics that the waste cement blocks are reused, a large number of recyclable resources are saved, the environment is protected while the phosphorus in rainfall runoff is adsorbed, and circular economy is developed. 本发明公开了种改性废弃水泥块在去除雨水中磷方面