The phosphorus removal performance and mechanism of porous self-supporting calcium sulfoaluminate materials
ZHANG Chengjuan
SONG Xuefeng
Abstract：Urban landscape water bodies commonly face eutrophication issues,with excessive phosphorus accumulation being a primary cause of freshwater degradation.Adsorption is a promising method for phosphorus removal.However,traditional adsorbents suffer from challenges such as material loss and difficulty in recovery.To address these limitations,this study developed a low-sul-fur hydrated calcium sulfoaluminate self-supporting porous material(AFm-SPM)via a foaming process using sulfoaluminate cement clinker as the raw material.The microstructure of AFm-SPM was characterized using SEM,XRD,and BET techniques,and its phos-phorus adsorption performance was systematically investigated through kinetic and thermodynamic modeling.Results demonstrated that AFm-SPM exhibits a layered porous structure and self-supporting compressive strength,achieving a maximum adsorption capac-ity of 188.679 mg/g.During the phosphorus adsorption process by AFm-SPM,calcium-bound phosphorus occupied the highest pro-portion,followed by aluminum-bound phosphorus,and finally weakly bound phosphorus.Additionally,the material maintained a stable structure after adsorption.
Keywords：porous self-supporting calcium sulfoaluminate materialwater eutrophicationphosphorus removaladsorption mech-anism
Publication Date：2025-08-25
Online Publishing Date：2025-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 23-28,46 )