复合沸石脱氮除磷性能研究  

Study on Nitrogen and Phosphate Removal by Using Compound Zeolite

作　　者：江乐勇[1,2] 林海[1] 宋乾武[2] 赵志英[1] 董颖博[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国环境科学研究院,北京100012

出　　处：《工业安全与环保》2011年第2期7-9,共3页Industrial Safety and Environmental Protection

基　　金：国家"十一五"科技支撑计划重大资助项目(No.2006BAC19B01)

摘　　要：为降低污水中氮、磷的含量,采用吸附法去除水中的氮磷。对天然沸石进行改性、复合处理,结果表明,改性复合后沸石具备同步脱氮除磷的功能。复合沸石吸附氨氮的等温线较好地符合Freundlich等温线模型,而吸附磷的等温线较好地符合Langmuir等温线模型。叶洛维奇吸附动力学方程能更好地阐明复合沸石在脱氮除磷过程中的吸附机理。对材料进行的扫描电镜对比测试表明,在制备过程中改变了沸石表面形貌。通过EDS分析,可知材料在制备前后其组成成分也发生了相应的变化。In order to reduce the concentration of nitrogen and phosphate remained in wastewater,adsorption processes were adopted to remove nitrogen and phosphate,in which the nature zeolite is modified and compounded as a matrix material.After the treatment,the goal of nitrogen and phosphate synchronous removal is obtained.Adsorption isotherms are depicted for nitrogen and phosphate removal. Freundlich isotherm model and Langmuir isotherm model are well matched by nitrogen and phosphate absorptions,respectively.Elovich absorption kinetic equation could clearly illuminate the absorption process.From the SEM images that the pore structure is expanded to some extent,the diameter and shape of pores are obviously changed.Meanwhile,EDS analysis shows that the components of the material also varies.

关 键 词：氨氮 磷 复合 沸石 

分 类 号：X703[环境科学与工程—环境工程]