山西大学学报（自然科学版）2011，Vol.34Issue(3)：485-491,7.
天然沸石对氨氮的吸附特性研究
Characteristics of Ammonium Adsorption on Natural Zeolite
摘要
Abstract
Adsorption kinetics,adsorption equilibrium isotherms and the effect of pH on the removal of ammonium using natural zeolite were investigated. The results showed that the adsorption plots fit to Lang-muir and Freundlich models very well, with the maximum ammonium adsorption capacity of 8. 10 mg/g. Compared with the intra-particle diffusion kinetic model, the pseudo-second-order model reflected more reasonable for ammonium ion uptake on zeolite. The optimum adsorption capacity of ammonium was obtained at pH in the range of 4. 0~8. 0. And a vertical flow constructed wetland ( VFCW) was constructed with the zeolite. The results showed that the ammonium removal efficiency of VFCW (R, %) was more than 90% in the first 3 months of operation,and decreased gradually in the subsequent 7 months. When the rate of the cumulative amount of ammonium in the influent to the maximum ammonium adsorption capacity of the zeolite filled in VFCW (r,%) was less than 150%, there was a linear relationship between R and r, which will be benefit for the design and operation of VFCW in the actual application.关键词
污水处理/氨氮去除/沸石/吸附/垂直流人工湿地Key words
wastewater treatment/ammonium removal/zeolite/adsorption/vertical flow constructed wetland分类
资源环境引用本文复制引用
邹娟,郭雪松,李琳,刘俊新..天然沸石对氨氮的吸附特性研究[J].山西大学学报（自然科学版）,2011,34(3):485-491,7.基金项目
国家科技重大专项“水污染控制与治理”资助(编号2008ZX07101-006-03) （编号2008ZX07101-006-03）
