改性沸石处理含氨氮废水  

Removing ammonia nitrogen from sewage by modified zeolite

作　　者：魏彩春[1] 张学洪[1] 张兵[2] 王洪涛[1] 

机构地区：[1]桂林工学院资源与环境工程系,广西桂林541004 [2]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《桂林工学院学报》2006年第1期28-32,共5页Journal of Guilin University of Technology

基　　金：国家高技术研究发展计划(863)资助项目(2003AA601060-02-03);广西科技攻关项目(桂科攻0428008-4N);广西科学基金资助项目(桂科基0575103)

摘　　要：研究了改性沸石对小区污水中氨氮的吸附效果及影响吸附的主要因素，以及吸附饱和沸石的铵解吸效果．实验结果表明：影响改性沸石除铵的主要因素是改性沸石层的装填高度、改性沸石粒径大小、原水水质、流速等．实验所得数据符合Langmuir吸附模式；在pH为5～8和吸附时间2h时，沸石对NH4^＋的吸附量可达12．92mg／g．沸石对NH4^＋具有很高的选择性和离子交换能力，能够用于处理生活小区高浓度氨氮污水．高浓度的NaHCO，溶液对铵吸附饱和改性沸石具有很好的解吸作用，在10个床层内可以使25％的吸咐态NH4^＋解吸．The adsorption of NH4^＋ in domestic sewage by modified zeolite is studied, including the main influence factors, adsorption efficiency of NH4^＋ by zeolite and desorption efficiency. The experiments show that the layer height, the particle size of zeolite, the quality of the raw sewage and the flow velocity are the main influence factors. The adsorption of NH4^＋ can well fit to Langmuir adsorption isotherm. Under the condition of pH 5 8 and adsorption time of 2h, the adsorption capacity of NH4^＋ by zeolite is 12.92 mg/g. Zeolite has good selectivity and high ion-exchange ability to the NH4^＋ , thus it can be used in domestic sewage treatment. In addition, the high concentration of NaHC03 is useful for the desorption of modified zeolite saturated by NH4^＋. 25% of the adsorbed NH4^＋ can be desorbed in 10 beds.

关 键 词：废水处理 氨氮 改性沸石 解吸 

分 类 号：X703[环境科学与工程—环境工程]