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纳米铁的制备及其还原硝酸盐氮的产物与机理

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李铁龙, 康海彦, 刘海水, 刘振英, 王薇, 金朝晖. 纳米铁的制备及其还原硝酸盐氮的产物与机理[J]. 环境化学, 2006, 25(3): 294-296.
引用本文: 李铁龙, 康海彦, 刘海水, 刘振英, 王薇, 金朝晖. 纳米铁的制备及其还原硝酸盐氮的产物与机理[J]. 环境化学, 2006, 25(3): 294-296.
shu
LI Tie-long, KANG Hai-yan, LIU Hai-shui, LIU Zhen-ying, WANG Wei, JIN Zhao-hui. PREPARATION OF NANOSCALE IRON FOR REDUCTION OF NITRATE PRODUCT AND MECHANISMS[J]. Environmental Chemistry, 2006, 25(3): 294-296.
Citation: LI Tie-long, KANG Hai-yan, LIU Hai-shui, LIU Zhen-ying, WANG Wei, JIN Zhao-hui. PREPARATION OF NANOSCALE IRON FOR REDUCTION OF NITRATE PRODUCT AND MECHANISMS[J]. Environmental Chemistry, 2006, 25(3): 294-296.
shu

纳米铁的制备及其还原硝酸盐氮的产物与机理

  • 1.

    南开大学环境科学与工程学院, 天津, 300071

  • 基金项目:

    国家自然科学基金(批准号:20477019)资助项目

PREPARATION OF NANOSCALE IRON FOR REDUCTION OF NITRATE PRODUCT AND MECHANISMS

  • 1.

    College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China

  • Fund Project:

  • 摘要: 采用微乳技术制备纳米铁粒子, 并在无氧环境、室温、中性条件下与NO3-反应, 研究纳米铁与硝酸盐反应的产物及反应机理.结果表明: 纳米铁在30min内能与99%硝酸盐反应, 反应的主要产物为氨氮, 且伴有亚硝酸盐产生, 亚硝酸盐氮的浓度在反应过程中出现极大值; 由质量平衡关系推出,纳米铁与硝酸盐反应是氧化还原与吸附作用同时存在的过程, 反应的主要路径为NO3-→NO2-→NH4+.
    Abstract: To investigate chemical reduction of nitrate by nanoscale zero-valent iron (NZVI) in aqueous and related pathways for synthesizing iron nanoparticle which has a size in the range of 20nm.And under the experimental conditions NZVI removed mostly 99% of nitrate within a period of 30min.Nitrate removal was accompanied by [NH4+] increase and [NO2-] undergo the process of from increase to decrease,note the maximum in the(intermediate) species [NO2-] so assumed that the role of nanoscale iron in the nitrate reduction should be take part in two major processes:(a) directly participate in the redox reaction;and(b) adsorption of nitrate.And the path way NO3-→NO2-→NH4+ was proposed.
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  • [1] Andrey J Z,Jackie Y Y,Reverse Microemulsion Synthesis of Nanostructured Complex Oxides for Catalytic Combustion.Nature,2000,403(6):65-68
    [2] Cheng F,Muftikian R,Fernando Q et al.,Reduction of Nitrate to Ammonia by Zero-Valent Iron.Chemosphere,1997,35(11):2689-2696
    [3] Huang C P,Wang H W,Chiu P C,Nitrate Reduction by Metallic Iron.Wat.Res.,1998,32(8):2257-2264
    [4] Agrawal A,Tratnyek P G,Reduction of Nitroaromatic Compounds by Iron Metal.Environ.Sci.Technol.,1996,30(1):53-160
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李铁龙, 康海彦, 刘海水, 刘振英, 王薇, 金朝晖. 纳米铁的制备及其还原硝酸盐氮的产物与机理[J]. 环境化学, 2006, 25(3): 294-296.
引用本文: 李铁龙, 康海彦, 刘海水, 刘振英, 王薇, 金朝晖. 纳米铁的制备及其还原硝酸盐氮的产物与机理[J]. 环境化学, 2006, 25(3): 294-296.
shu
LI Tie-long, KANG Hai-yan, LIU Hai-shui, LIU Zhen-ying, WANG Wei, JIN Zhao-hui. PREPARATION OF NANOSCALE IRON FOR REDUCTION OF NITRATE PRODUCT AND MECHANISMS[J]. Environmental Chemistry, 2006, 25(3): 294-296.
Citation: LI Tie-long, KANG Hai-yan, LIU Hai-shui, LIU Zhen-ying, WANG Wei, JIN Zhao-hui. PREPARATION OF NANOSCALE IRON FOR REDUCTION OF NITRATE PRODUCT AND MECHANISMS[J]. Environmental Chemistry, 2006, 25(3): 294-296.
shu

纳米铁的制备及其还原硝酸盐氮的产物与机理

  • 1. 南开大学环境科学与工程学院, 天津, 300071
基金项目:

国家自然科学基金(批准号:20477019)资助项目

摘要: 采用微乳技术制备纳米铁粒子, 并在无氧环境、室温、中性条件下与NO3-反应, 研究纳米铁与硝酸盐反应的产物及反应机理.结果表明: 纳米铁在30min内能与99%硝酸盐反应, 反应的主要产物为氨氮, 且伴有亚硝酸盐产生, 亚硝酸盐氮的浓度在反应过程中出现极大值; 由质量平衡关系推出,纳米铁与硝酸盐反应是氧化还原与吸附作用同时存在的过程, 反应的主要路径为NO3-→NO2-→NH4+.

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