Phosphorus adsorbent and preparation method thereof

Abstract

A method for preparing a phosphorus adsorbent, including: drying a waste gypsum to remove moisture; crushing and sieving an obtained dried gypsum to obtain a crushed gypsum; subjecting the crushed gypsum to pyrolysis in an inert gas atmosphere to obtain a pyrolysis product; and grinding and sieving the pyrolysis product to obtain the phosphorus adsorbent; wherein based on a total weight of the waste gypsum, the waste gypsum includes less than 47 wt % of SO3, more than 45 wt % of CaO, and less than 1 wt % of Al2O3. Also provided is a phosphorus adsorbent prepared by the method.

Dependencies are inferred from the claim text.