钙(Ⅱ)对铁锰氧化物催化氧化去除氨氮的影响  

Effect of Ca(Ⅱ) on Catalytic Oxidation of Ammonia Nitrogen by Iron and Manganese Oxide

作　　者：刘杰[1] 黄廷林[1] 郭英明[1] 武俊槟 张帆[1] LIU Jie HUANG Ting-lin GUO Ying-ming WU Jun-bing ZHANG Fan(School of Environmental and Municipal Engineering, Xi＇ an University of Architecture and Technology, Xi＇ an 710055, China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2016年第23期10-15,共6页China Water & Wastewater

基　　金：国家重点研发计划课题(2016YFC0400706);国家自然科学基金资助项目(51278409、51308438);陕西省自然科学基础研究计划项目(2014JZ015);中建股份科技研发课题(CSCEC-2014-Z-32)

摘　　要：利用已持续运行2年的石英砂滤柱中试系统，通过改变进水中离子的种类及其浓度，考察了不同高浓度离子对石英砂滤料表面活性铁锰氧化物滤膜催化氧化水中氨氮性能的影响。结果表明：高浓度钠离子、钾离子、氯离子、硫酸根离子、碳酸氢根离子对滤料去除氨氮性能基本没有影响，去除率均达到了87％以上。高浓度钙离子对滤料去除氨氮性能影响很大，当进水氯化钙浓度为1000mg／L时，去除率降低到了51％。停止投加钙离子后，滤料去除氨氮的性能可在8—9h内恢复。对滤料表面进行微观表征后发现钙的含量大幅上升，降低了滤料的比表面积、孔体积，影响了滤料与氨氮污染物的接触，造成对氨氮去除率的下降。The effects of different ions on the catalytic oxidation of ammonia nitrogen in groundwater by iron and manganese oxide active film on quartz sands were investigated by changing types and concentrations of ions in the influent of a pilot-scale filter which has been operated for about two years. The results showed that high concentrations of Na ＋ , K＋ , C1 -, SO2- and HC03- had little effect on the cata- lytic oxidation of ammonia nitrogen, and the removal rate of ammonia nitrogen was more than 87 %. However, the Ca2＋ had a great influence on the removal of ammonia nitrogen. When the influent concentration of CaC12 was 1 000 mg/L, the removal rate of ammonia nitrogen was reduced to 51%. The performance of catalytic oxidation of ammonia nitrogen could be recovered within 8 to 9 h after stopping the addition of CaC12. The microstructure characteristic results indicated that the concentration of Ca2＋ on the surface of the filter film was increased, thus leading to the decrease in the specific surface area and pore volume, which influenced the contact between filter in the removal rate of ammonia nitrogen. film and ammonia nitrogen and caused the reduction

关 键 词：活性滤膜 接触氧化 钙离子 氨氮 

分 类 号：TU991.2[建筑科学—市政工程]