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›› 2005, Vol. 5 ›› Issue (3): 332-336.

• 生化工程专栏 • 上一篇    下一篇

嗜热布氏酸菌对梅州黄铜矿的生物浸出过程特性

石贤爱,李聪颖,林晖,孟春,郭养浩   

  1. 福州大学生物工程系
  • 出版日期:2005-06-20 发布日期:2005-06-20

Process Characteristics of Bioleaching Meizhou Chalcopyrite by Thermophilic Acidianus brierleyi

SHI Xian-ai,LI Cong-ying,LIN Hui,MENG Chun,GUO Yang-hao   

  1. Inst. Biological Sci. & Technol., Fuzhou Univ.
  • Online:2005-06-20 Published:2005-06-20

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摘要： 研究了嗜热布氏酸菌对梅州黄铜矿的浸出机理和浸出过程特性. 嗜热布氏酸菌(简称A.B菌)在梅州黄铜矿表面的吸附过程符合朗格缪尔等温线，最大吸附量XAm 5.00×108 cell/g，吸附平衡常数KA 5.88×10-7 mL/cell. 梅州黄铜矿的浸出主要是通过A.B菌的直接氧化起作用. 单独A.B菌处理时，铜浸出速率为0.0137 g/(L·h)，是Fe3+化学氧化速率的6倍. A.B菌(65℃)对梅州黄铜矿的浸出速率是常温氧化亚铁硫杆菌(简称T.F)的16倍(31℃). A.B菌生长和浸矿的最适温度均为65℃，微生物生长最佳pH为2.0，而浸矿最适pH为1.5. A.B菌处理10 d可使铜浸出率达91.3%，具有潜在的工业应用价值.

关键词: 生物浸矿, 布氏酸菌, 嗜酸嗜热菌, 黄铜矿

Abstract: The mechanism and characteristics of Meizhou chalcopyrite bioleaching by Acidianus brierleyi were studied. Adsorption of Acidianus brierleyi on the surface of ore was correlated with the Langmuir isotherm, the maximum adsorption capacity, XAm, was 5.00×108 cell/g, the adsorption equilibrium constant, KA, was 5.88×10-7 mL/cell. Bioleaching of Meizhou chalcopyrite by Acidianus brierleyi proceeded mainly with the direct bacterial oxidation. The bioleaching rate of copper solely by Acidianus brierleyi was 0.0137 g/(L·h), 6 times of the chemical oxidation rate of Fe3+. The bioleaching rate of Meizhou chalcopyrite by Acidianus brierleyi (65℃) was 16 times as that of Thiobacillus ferrooxidans (31℃). The optimal temperature of growth and leaching with Acidianus brierleyi was 65℃, the optimal pH of growth was 2.0, whereas the optimal pH of bioleaching was 1.5. Acidianus brierleyi would have a potential perspective in industrial application, as it could leach 91.3 percent of copper in Meizhou chalcopyrite within 10 days.

Key words: bioleaching, Acidianus brierleyi, acidophilic thermophile, Meizhou chalcopyrite