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纳米铁还原脱氮动力学及其影响因素

黄园英, 秦臻, 刘丹丹, 王晓春

黄园英, 秦臻, 刘丹丹, 王晓春. 纳米铁还原脱氮动力学及其影响因素[J]. 岩矿测试, 2011, 30(1): 53-58.
引用本文: 黄园英, 秦臻, 刘丹丹, 王晓春. 纳米铁还原脱氮动力学及其影响因素[J]. 岩矿测试, 2011, 30(1): 53-58.
HUANG Yuan-ying, QIN Zhen, LIU Dan-dan, WANG Xiao-chun. Kinetics and Effect Factors of Reductive Denitrification with Nanoscale Zero-valent Iron[J]. Rock and Mineral Analysis, 2011, 30(1): 53-58.
Citation: HUANG Yuan-ying, QIN Zhen, LIU Dan-dan, WANG Xiao-chun. Kinetics and Effect Factors of Reductive Denitrification with Nanoscale Zero-valent Iron[J]. Rock and Mineral Analysis, 2011, 30(1): 53-58.

纳米铁还原脱氮动力学及其影响因素

基金项目: 

国家地质实验测试中心基本科研业务费项目资助 (201012CSJ02)

水体污染控制与治理科技重大专项资助(2009ZX07424-002)

国土资源部公益行业科研专项资助(200911015-05)

Kinetics and Effect Factors of Reductive Denitrification with Nanoscale Zero-valent Iron

  • 摘要: 饮用水中硝酸盐(NO-3)对人体健康有危害。为了去除水溶液中NO-3,在实验室制得纳米铁颗粒。它的粒径为20~40 nm,比表面积(BET)为49.16 m2/g。本研究通过批实验考察了纳米铁对NO-3还原脱氮动力学性质和影响NO-3脱氮快慢的主要因素,如反应pH、纳米铁投加量和NO-3起始浓度。实验结果表明,pH越低越有利于NO-3还原。在一定范围内,NO-3还原速率随纳米铁投加量增加而增大,而随NO-3起始浓度升高而降低,反应遵循准一级反应动力学方程,表面吸附和氧化还原反应是纳米铁对NO-3脱氮的主要去除机理。纳米铁对NO-3还原过程中可能反应的途径进行了讨论,NO-3还原产物取决于反应条件。在本研究条件下,纳米铁对NO-3脱氮的最终产物主要为NH+4-N而不是N2,必须进行更多的研究来解决这一问题。
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出版历程
  • 收稿日期:  2010-04-14
  • 修回日期:  2010-12-09

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