摘要
从硫化物矿床酸性矿坑水中分离的细菌Thiobacillus Ferrooxidans直接作用于硫化物,有效地加速了硫化物的氧化过程。在细菌作用下硫酸铁可溶解微粒金,显示了细菌是硫化物矿床氧化带中金表生富集的重要微生物因素。在细菌氧化过程中,高浓度Fe^(3+)和SO_4^(2+)的硫酸盐溶液直接形成草黄铁矾;而在低浓度Fe^(3+)的硫酸盐溶液中形成针铁矿。同时,细菌的耐酸性和氧化功能,为酸性矿坑水的处理提供微生物化学途径。
Thiobacillus Ferrooxidans were separated from acid mine water in sulphide deposits. The experiment has demonstrated that the ehemoautotrophic bacteria can act directly on sulphices and accelerate the oxidation of sulphides. Bacteria take in iron and sulphur in sulphides, and through their own microbial activity and metabolism they cause Fe^(2+)→Fe^(3+)+ and S^(2-)→SO_4^(2-) and energy to release; thus the system is in a strong oxidation environment. The experiment shows that gold is dissolved in ferric sulphates by means of bacterial activity and that through this gold sulphate complex can be formed. This is the important mode of migration of gold under the supergene conditions. Bacteria are an important microbial factor of gold supergene envirchment in the oxidized zones of sulphide deposits. In the bacterial oxidized solusions, highly concentrated Fe^(3+) and SO_4^(2-) directly form siderotils, while in the sulphate system with a low Fe^(3+) concentration, goethite is formed. The acid resistance and oxidizing power of the bacteria can provide a biochemical way for the treatment of acid mine water.
出处
《地质学报》
EI
CAS
CSCD
北大核心
1993年第3期221-231,共11页
Acta Geologica Sinica
关键词
硫化物
细菌氧化
金
富集作用
sulphides, bacterial oxidation, supergene enrichment of gold
