摘要
城市景观水体普遍面临富营养化问题,其中磷的过量积累是导致淡水水体恶化的主要原因之一。吸附法是目前发展前景较好的方法,针对传统吸附剂易流失、难回收的问题,以硫铝酸盐水泥熟料为原料,通过发泡工艺制备多孔自支撑硫铝酸钙材料(AFm-SPM),并采用SEM、XRD、BET等表征材料的微观结构,进行动力学和热力学拟合研究其对磷吸附性能的影响。结果表明,AFm-SPM具有层状多孔结构及自支撑抗压强度,最大吸附容量达188.679mg/g。AFm-SPM对磷的吸附过程中钙结合态磷占比较大,其次是铝结合态,最后是弱结合态,且吸附后材料结构保持稳定。
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-sulfur 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 phosphorus 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 capacity of 188.679 mg/g.During the phosphorus adsorption process by AFm-SPM,calcium-bound phosphorus occupied the highest proportion,followed by aluminum-bound phosphorus,and finally weakly bound phosphorus.Additionally,the material maintained a stable structure after adsorption.
作者
张程娟
宋学锋
ZHANG Chengjuan;SONG Xuefeng(School of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《新型建筑材料》
2025年第8期23-28,46,共7页
New Building Materials
关键词
多孔自支撑硫铝酸钙材料
水体富营养化
除磷
吸附机理
porous self-supporting calcium sulfoaluminate material
water eutrophication
phosphorus removal
adsorption mech原anism
作者简介
张程娟,女,2000年生,硕士研究生,E-mail:zchengjuan@xauat.edu.cn;通讯作者:宋学锋,博士,教授,E-mail:songxuefeng-2008@163.com。
