生物质灰滤材磷素吸附性能研究  

Phosphorus adsorption performance of biomass ash filter material

作　　者：余子俊 俞佳航 朱骏逸 侯存 屈智超 牛文娟 艾平[1] 冯耀泽[1] 刘念 YU Zi-jun;YU Jia-hang;ZHU Jun-yi;HOU Cun;QU Zhi-chao;NIU Wen-juan;AI Ping;FENG Yao-ze;LIU Nian(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;Key Laboratory of Aquaculture Facilities Engineering&Agricultural Equipment Laboratory of the Middle and Lower Reaches of the Yangtze River,Ministry of Agriculture and Rural Affairs,Wuhan 430070,China)

机构地区：[1]华中农业大学工学院,湖北武汉430070 [2]农业农村部水产养殖设施工程重点实验室,农业农村部长江中下游农业装备重点实验室,湖北武汉430070

出　　处：《中国环境科学》2025年第4期2028-2040,共13页China Environmental Science

基　　金：国家自然科学基金资助项目(32201685);国家级大学生创新创业训练计划项目(202410504062)。

摘　　要：以生物质灰为原料,短时高温烧结制得孔隙发达、化学性能稳定的新型块体滤材,并对其磷素吸附性能及所涉动力学、热力学行为展开研究.静态吸附试验结果表明,在较高磷素初始浓度或反应温度、较长吸附时间或较低固液比下,生物质灰滤材对磷素的单位吸附量更高,其中固液比为影响滤材磷吸附的主控因素.当磷素初始浓度为90mg/L、反应温度55℃、吸附时间1250min、pH=3、固液比为1:200(g:mL)时,该滤材单位吸附量最高可达7.72mg/g.生物质灰滤材表面呈非均质结构,对磷素的吸附以多层物理吸热吸附为主,单层或多层化学自发吸附为辅.在动态吸附条件下,该滤材磷素单位吸附量可达椰壳生物炭、陶粒、天然沸石3种常见商用滤材的9.8、22.27、27.22倍,显示出良好吸附性能,在净化水质的同时实现生物质灰消纳与循环利用,极具推广价值.A new block filter material with well-developed pores and stable chemical properties was prepared from a biomass ash by short-term and high-temperature sintering.The phosphorus adsorption properties,as well as the kinetics and thermodynamic behaviors,of this material were investigated in this paper.The results of the static adsorption experiments show that the biomass ash filter achieved higher phosphorus adsorption per unit under conditions of higher initial phosphorus concentration,higher reaction temperature,longer adsorption time,or lower solid-liquid ratio.Among these parameters,the solid-liquid ratio was the primary controlling parameter affecting phosphorus adsorption by the filter material.The maximum adsorption per unit of the filter material reached 7.72mg/g,when the initial concentration of phosphorus was 90mg/L,the reaction temperature was 55°C,the adsorption time was 1250min,the pH was 3,and the solid-liquid ratio was 1:200(g:mL).The surface of the material exhibited a heterogeneous structure,and its phosphorus adsorption was primarily driven by multilayer physical endothermic adsorption,supplemented by monolayer or multilayer spontaneous chemical adsorption.Under the dynamic adsorption conditions,the phosphorus adsorption capacity of this filter material per unit was 9.8,22.27 and 27.22 times that of three common commercial filter materials,including coconut shell biochar,ceramsite and natural zeolite,respectively.This indicates excellent adsorption properties,enabling water purification while achieving biomass ash disposal and recycling,making it highly valuable for promotion.

关 键 词：生物质灰 滤材 磷素 吸附 动力学模型 热力学 

分 类 号：X712[环境科学与工程—环境工程]