催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (8): 1031-1036.DOI: 10.3724/SP.J.1088.2010.00448

• 研究论文 • 上一篇    下一篇

碳酸氢钠溶液中微量 Mn2+离子催化氧化降解有机污染物

徐爱华 1, 邵科杰 1, 吴文利 1, 范兢 2, 崔金久 2, 尹国川 1   

  1. 1华中科技大学化学与化工学院, 湖北武汉 430074 2宁波市环境保护科学研究设计院, 浙江宁波 315012
  • 收稿日期:2010-04-28 修回日期:2010-06-14 出版日期:2010-08-30 发布日期:2013-12-26
  • 通讯作者: 尹国川

Oxidative Degradation of Organic Pollutants Catalyzed by Trace Manganese(II) Ion in Sodium Bicarbonate Solution

XU Aihua1, SHAO Kejie1, WU Wenli1, FAN Jing2, CUI Jinjiu2, YIN Guochuan1,*   

  1. 1School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China 2Environment Protection Science Research and Design Institute of Ningbo, Ningbo 315012, Zhejiang, China
  • Received:2010-04-28 Revised:2010-06-14 Online:2010-08-30 Published:2013-12-26

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1310

被引次数

20

摘要： 考察了微量 Mn2+离子在 NaHCO3 溶液中催化 H2O2 氧化降解有机污染物的性能. 结果表明, NaHCO3, MnCl2 和 H2O2 浓度分别为 25, 0.1 和 100 mmol/L 时, 在 25 oC 下反应 180 min 后亚甲基蓝可完全脱色, 化学耗氧量和总有机碳去除率分别达到 44.0% 和 13.8%. 该催化体系对甲基橙、罗丹明 B 以及垃圾渗滤液等都有较好去除效果. 紫外-可见光谱分析及反应动力学测试表明, MnIV=O 是该催化体系主要活性物种.

关键词: 碳酸氢钠, 过氧化氢, 二价锰离子, 降解, 染料, 垃圾渗滤液

Abstract: Catalytic degradation of organic pollutants in a sodium bicarbonate solution with Mn2+ ion (0.004–0.1 mmol/L) as the catalyst has been studied using H2O2 as the oxidant. Complete decoloration of methylene blue was achieved in 180 min with 44.0% chemical oxidation demand removal at 25 oC at the NaHCO3, MnCl2 and H2O2 concentrations of 25, 0.1, and 100 mmol/L, respectively. The total organic carbon measurement indicated that 13.8% of the carbon was mineralized. The Mn2+/HCO3? + H2O2 system also showed high ability for oxidative degradation of methyl orange, rhodamine B, and even landfill leachate. The analysis of UV-Vis spectroscopy and reaction kinetics indicated that the MnIV=O intermediate is the key active species in methylene blue degradation.

Key words: sodium bicarbonate, hydrogen peroxide, manganese(II) ion, degradation, dye, landfill leachate

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