5种典型生物滤池填料氮磷吸附效果及特征  

Effect and Characteristics of 5 Kinds Typical Biofilter Packings on Nitrogen and Phosphorus Adsorption

作　　者：刘海燕 岳帅豪 施旭洋 王彦菲 刘哂哲 吴慧芳 LIU Haiyan;YUE Shuaihao;SHI Xuyang;WANG Yanfei;LIU Shenzhe;WU Huifang(College of Urban Construction,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学城市建设学院,江苏南京211816

出　　处：《净水技术》2025年第3期106-112,134,共8页Water Purification Technology

基　　金：江苏省研究生科研与实践创新计划项目(SJCX23_0488)。

摘　　要：【目的】吸附填料作为生物滤池的重要组成部分,研究其吸附特性对于生物滤池吸附填料的选择具有重要意义。【方法】此研究选取生物滤池中具有典型代表的5种填料(核桃壳、火山岩、沸石、绿辉石、陶粒)进行氮磷吸附试验,包括等温吸附试验和动力学吸附试验,基于等温吸附拟合和动力学吸附拟合结果考察填料吸附特性,以此探究填料吸附效果及特征。【结果】试验结果表明,5种填料中沸石对氮磷吸附量分别为0.3357、0.0045 mg/g,陶粒对氮磷吸附量分别为0.1074、0.0197 mg/g,综合而言,在5种典型生物滤池填料中沸石和陶粒表现出对氮磷有较优的吸附效果,准二级动力学模型可以更准确地描述陶粒对水中氨氮和总磷(TP)的吸附过程,陶粒和沸石吸附数据均与Freundlich模型有较好的符合性,说明吸附以化学吸附为主。【结论】文章通过对核桃壳、火山岩、沸石、绿辉石和陶粒进行吸附性能探究试验,试验得出,沸石和陶粒吸附性能较高,根据吸附模型进行线性拟合,得出沸石和陶粒吸附结果更符合Freundlich等温模型,吸附动力学特征更符合准二级动力学模型,结合扫描电镜分析(SEM)和比表面积分析(BET)表征结构最终筛选出沸石与陶粒作为优质氮磷吸附填料。[Objective]As an important part of the biofilter tank,the study of its adsorption characteristics is of great significance to selection of adsorption filler of biological filter tank.[Methods]This study selects 5 typical fillers(walnut shell,volcanic rock,zeolite,omphacite and ceramsite)with typical representatives in biofilter tank for nitrogen and phosphorus adsorption experiments,including isothermal adsorption tests and kinetic adsorption tests.Based on the result of isothermal adsorption fitting and kinetic adsorption fitting,the adsorption characteristics of fillers are investigated to explore Adsorption effect and characteristics of filler.[Results]The test result showed that the adsorption of zeolite to nitrogen and phosphorus in 5 types of fillers were 0.3357 mg/g and 0.0045 mg/g respectively,and the adsorption of ceramic particles to nitrogen and phosphorus were 0.1074 mg/g and 0.0197 mg/g respectively.Overall,in 5 typical organisms zeolite and ceramic particles in filter tank filler showed a better adsorption effect on nitrogen and phosphorus.The quasi-secondary kinetic model can more accurately describe the adsorption process of ceramic particles on ammonia nitrogen and total phosphorus(TP)in water.The adsorption data of ceramic particles and zeolite were well consistent with the Freundlich model,indicating that the adsorption was mainly chemical adsorption.[Conclusion]This paper explores the adsorption performance of walnut shell,volcanic rock,zeolite,green pyrolite and ceramic particles.The experiment shows that zeolite and ceramic particles have high adsorption performance.According to the adsorption model,the adsorption result of zeolite and ceramic particles are more in line with the Freundlich isothermal model,and the adsorption power The scientific characteristics are more in line with the quasi-secondary dynamic model.Combined with scanning electron microscope(SEM)and brunner emmet teller(BET)characterization structure,zeolite and ceramic particles are finally screened out as high-quality nitr

关 键 词：填料 氨氮 总磷(TP) 吸附特征 结构表征 

分 类 号：X703[环境科学与工程—环境工程]