Method for preparing porous calcium silicate adsorbent from phosphogypsum

The invention discloses a method for preparing a porous calcium silicate adsorbent from ardealite, and belongs to the technical field of gypsum resource recycling. The method mainly comprises the following steps: mixing ardealite, a silicon source, caustic alkali and water, uniformly stirring, and reacting under closed conditions to obtain a filtrate and a solid product. The solid product is dried and then used for adsorbing and enriching phosphorus in phosphorus-containing wastewater, and after adsorption is finished, the solid product can be converted into the calcium-silicon-phosphorus compound fertilizer. The filtrate is further purified, and sulfate in the filtrate can be recycled. According to the method, calcium, sulfur, phosphorus and other resources in the phosphogypsum are fully utilized, resource recycling of the phosphogypsum and the phosphorus-containing wastewater is achieved, and the method has important significance on high-value utilization of solid waste and wastewater. 本发明公开一种磷石膏制备多孔硅酸钙吸附剂的