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三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究

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蔡美芳, 党志, NELSON Belzile, 陈雨薇. 三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究[J]. 环境化学, 2005, 24(5): 528-532.
引用本文: 蔡美芳, 党志, NELSON Belzile, 陈雨薇. 三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究[J]. 环境化学, 2005, 24(5): 528-532.
shu
CAI Mei-fang, DANG Zhi, NELSON Belaile, CHEN Yu-wei. THE PASSIVATION OF PYRRHOTITE BY TRIETHYLENETETRAMINE[J]. Environmental Chemistry, 2005, 24(5): 528-532.
Citation: CAI Mei-fang, DANG Zhi, NELSON Belaile, CHEN Yu-wei. THE PASSIVATION OF PYRRHOTITE BY TRIETHYLENETETRAMINE[J]. Environmental Chemistry, 2005, 24(5): 528-532.
shu

三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究

  • 1.

    华南理工大学环境科学与工程学院, 广州, 510640;

  • 2.

    Department of Chemistry & Biochemistry, Laurentian University, Sudbury, Ontario, Canada, P3E 2C6

  • 基金项目:

    Natural Sciences and Engineering esearch Council of Canada, Materials and Manufacturing Ontario Center of Excellence

    广东省科技厅重大专项项目(2004A30308002)共同资助

THE PASSIVATION OF PYRRHOTITE BY TRIETHYLENETETRAMINE

  • 1.

    College of Environmental Science and Engineering, South Chin a University of Technology, Guangzhou, 510640;

  • 2.

    Department of Chemistry & Bioc hemistry, Laurentian University, Sudbury, Ontario, Canada, P3E 2C6

  • Fund Project:

  • 摘要: 本文分别对三乙烯四胺(TETA)抑制磁黄铁矿在空气和Thiobacillus ferrooxidans细菌作用下的氧化过程进行了研究.结果表明:TETA不但能有效防止磁黄铁矿在85—90%湿度空气中的氧化,还能显著阻止Thiobacillus ferrooxidans对样品的生物氧化.与对照样品相比,在空气中氧化90d和被细菌氧化42d后,经TETA简单包膜处理样品的氧化程度分别降低了54.7%和82.07%.TETA通过在样品表面形成一层致密的膜来隔绝样品与氧气的接触,从而抑制了磁黄铁矿的空气氧化;碱性TETA还能通过提高反应体系的pH值、恶化嗜酸细菌Thiobacillus ferrooxidans的生存环境来阻止样品的生物氧化.
    Abstract: The potential of triethylenetetramine (TETA) to inhibit pyrrhotite oxidation by air and Thiobacillus ferrooxidans was investigated. The results showed that both the chemical oxidation in moist air (85—90% RH) and the biotic oxidation b y Thiobacillus ferrooxidans of sample had been suppressed significantly afte r coating treatment with TETA. Compared to the control, the oxidation extent of coated sample in the air (90d) and coated sample in the presence of bacteria (42 d) was reduced 54.7% and 82.07%, respectively. The formation of a strong non- porous passive film on the pyrrhotite surface and the alkaline property of this coating agent can be used to interpret the inhibition of oxidation.
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  • [1] 张芹,胡岳华,顾帼华等,磁黄铁矿自诱导浮选电化学的研究.有色金属,2004,2:4-6
    [2] Nicholson R V, Gillham R W, Reardon E J, Pyrite Oxidation in Carbonate-Buffered Solution.2. Rate Control by Oxide Coatings.Geochimica et Cosmochimica Acta,1990,54:395-402
    [3] Pratt A R, Muir I J, Nesbitt H W, X-Ray Photoelectron and Auger Electron Spectroscopic Studies of Pyrrhotite and Mechanism of Air Oxidation.Geochimica et Cosmochimica Acta,1994,58:827-841
    [4] Mycroft J R, Nesbitt H W, Pratt A R, X-ray Photoelectron and Auger Electron Spectroscopy of Air-Oxidized Pyrrhotite: Distribution of Oxidized Species with Depth.Geochimica et Cosmochimica Acta,1995,59:721-733
    [5] Georgopoulou Z J, Fytas K, Evangelou B, Feasibility and Cost of Creating an Iron-Phosphate Coating on Pyrrhotite to Prevent Oxidation.Environmental Geology,1996,28:61-69
    [6] Huang X, Evangelou V P, Suppression of Pyrite Oxidation Rate by Phosphate Addition. In: Alper C N and Blowes D W (Ed.). Environmental Geochemistry of Sulfide Oxidation. Washington, DC: American Chemical Society, 1994, pp.562-573
    [7] Lan Y, Huang X, Deng B, Supression of Pyrite Oxidation by Iron 8-Hydroxyquinoline.Environmetal Contamination and Toxicology,2002,43:168-174
    [8] 兰叶青,周刚,刘正华等,废矿堆中黄铁矿氧化控制新技术--有机盐包膜法.环境化学,2000,19(5):455-459


    [9] Steger H F, Oxidation of Sulphide Minerals.I.Determination of Ferrous and Ferric Iron in Samples of Pyrrhotite, Pyrite and Chalcopyrite.Talanta,1977,24:251-254
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  • 收稿日期:  2005-01-01
蔡美芳, 党志, NELSON Belzile, 陈雨薇. 三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究[J]. 环境化学, 2005, 24(5): 528-532.
引用本文: 蔡美芳, 党志, NELSON Belzile, 陈雨薇. 三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究[J]. 环境化学, 2005, 24(5): 528-532.
shu
CAI Mei-fang, DANG Zhi, NELSON Belaile, CHEN Yu-wei. THE PASSIVATION OF PYRRHOTITE BY TRIETHYLENETETRAMINE[J]. Environmental Chemistry, 2005, 24(5): 528-532.
Citation: CAI Mei-fang, DANG Zhi, NELSON Belaile, CHEN Yu-wei. THE PASSIVATION OF PYRRHOTITE BY TRIETHYLENETETRAMINE[J]. Environmental Chemistry, 2005, 24(5): 528-532.
shu

三乙烯四胺(TETA)抑制磁黄铁矿氧化的机理研究

  • 1.  华南理工大学环境科学与工程学院, 广州, 510640;
  • 2.  Department of Chemistry & Biochemistry, Laurentian University, Sudbury, Ontario, Canada, P3E 2C6
  • 收稿日期:  2005-01-01
基金项目:

Natural Sciences and Engineering esearch Council of Canada, Materials and Manufacturing Ontario Center of Excellence

广东省科技厅重大专项项目(2004A30308002)共同资助

摘要: 本文分别对三乙烯四胺(TETA)抑制磁黄铁矿在空气和Thiobacillus ferrooxidans细菌作用下的氧化过程进行了研究.结果表明:TETA不但能有效防止磁黄铁矿在85—90%湿度空气中的氧化,还能显著阻止Thiobacillus ferrooxidans对样品的生物氧化.与对照样品相比,在空气中氧化90d和被细菌氧化42d后,经TETA简单包膜处理样品的氧化程度分别降低了54.7%和82.07%.TETA通过在样品表面形成一层致密的膜来隔绝样品与氧气的接触,从而抑制了磁黄铁矿的空气氧化;碱性TETA还能通过提高反应体系的pH值、恶化嗜酸细菌Thiobacillus ferrooxidans的生存环境来阻止样品的生物氧化.

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