硝酸盐离子对嗜酸氧化亚铁硫杆菌介导的亚铁离子和黄铁矿生物氧化的影响。
Effect of Nitrate Ions on Acidithiobacillus ferrooxidans-Mediated Bio-oxidation of Ferrous Ions and Pyrite.
机构信息
Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Jinzhong, 030801, China.
Analytical Instrumentation Center, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, China.
出版信息
Curr Microbiol. 2020 Jun;77(6):1070-1080. doi: 10.1007/s00284-020-01912-9. Epub 2020 Feb 8.
Exploring the effects of nitrate ions (NO) on the bio-oxidation of Fe and pyrite will help reveal the actual mechanism of acid mine drainage (AMD) production. Long period shaking flask experiments were carried out in order to assess the effect of NO on the Acidithiobacillus ferrooxidans LX5 (A. ferrooxidans LX5)-mediated bio-oxidation of Fe and pyrite. In Fe bio-oxidation systems, A. ferrooxidans LX5 had stronger Fe oxidation capabilities in a NO-loaded solution than in a NO-free solution after 24 days, and the Fe bio-oxidation capacity of A. ferrooxidans LX5 acclimatized in solutions containing low concentrations (8.2-32.9 mmol/L) of NO was greater than when it was acclimatized in high NO concentration solutions (49.4-65.8 mmol/L). In pyrite bio-oxidation systems, in comparison with the system without NO, pyrite bio-oxidation efficiency was significantly increased when the NO concentration in the system was 8.2-16.5 mmol/L, and that the pyrite bio-oxidation efficiency in the system containing 8.2 mmol/L of NO was greater than that for the system with 16.5 mmol/L of NO. The pyrite bio-oxidation efficiency was inhibited when the NO concentration was above 32.9 mmol/L. The results from this study can be used to reveal the actual control behavior of NO on AMD production.
探索硝酸盐离子（NO）对 Fe 和黄铁矿生物氧化的影响将有助于揭示酸性矿山排水（AMD）产生的实际机制。为了评估 NO 对嗜酸氧化亚铁硫杆菌 LX5（A. ferrooxidans LX5）介导的 Fe 和黄铁矿生物氧化的影响，进行了长时间的摇瓶实验。在 Fe 生物氧化体系中，A. ferrooxidans LX5 在含有 NO 的溶液中的 Fe 氧化能力比在不含 NO 的溶液中强 24 天后，并且在含有低浓度（8.2-32.9 mmol/L）NO 的溶液中适应的 A. ferrooxidans LX5 的 Fe 生物氧化能力大于在高浓度（49.4-65.8 mmol/L）NO 的溶液中适应的能力。在黄铁矿生物氧化体系中，与不含 NO 的体系相比，当体系中的 NO 浓度为 8.2-16.5 mmol/L 时，黄铁矿生物氧化效率显著提高，并且在含有 8.2 mmol/L 的 NO 的体系中的黄铁矿生物氧化效率大于在含有 16.5 mmol/L 的 NO 的体系中的黄铁矿生物氧化效率。当 NO 浓度高于 32.9 mmol/L 时，黄铁矿生物氧化效率受到抑制。本研究的结果可用于揭示 NO 对 AMD 产生的实际控制行为。
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