The Mechanism on Ammonia Removal by Co-oxides Membrane Coated Sands in Fixed Bed Filter
A pilot scale quartz sand filtration was used for effective treatment of ground water with high ammonia,iron and manganese simultaneously in northwest district of Xi an.To figure out ammonia removal mechanism,three inactivation methods,including heating in high pressure steam,chemical reagents (sodium azide) addition as well as ozone inactivation,were used to inhibit the possible biological effect on ammonia removal.In addition,the characterization of filter sands as well as batch experiments were carried out to study the catalytic oxidation of ammonia on co-oxides membranes coated on the sands.The results show that the removal of ammonia decreased by 71.6%,61% and 9% after heating,sodium azide and ozone inactivation,but ammonia removal recovered in 116h,48h and 3h,respectively.The performance of recovery depended on the extent of membrane damage,and the sodium azide inhibit both biological effect and chemical catalytic oxidation of ammonia.It is concluded that chemical catalytic oxidation play a major role in the process of ammonia removal.
Ammonia removal Catalytic oxidation Filtration Mechanism discussion
Huang Tinglin Guo Yingming Cao Xin Liu Jiaqiang Xi Anlong
School of Environmental and Municipal Engineering, Xian university of architecture and technology, Xian710055, China
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
40-46
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）