School of Metallurgy, Northeastern University, Shenyang, 110819, China.
School of Chemical and Environmental, China University of Mining and Technology, Beijing, 100083, China.
Extremophiles. 2020 May;24(3):355-364. doi: 10.1007/s00792-020-01160-6. Epub 2020 Feb 27.
Heap biooxidation method was used to evaluate the availability of Paodaoling gold ore in Anhui province, China. 15,000 tons of gold ores (≤ 10 mm in diameter) were bioxidized under mesophilic conditions. Under the synergistic effect of microbial community, arsenic and sulfur were oxidized by 42% and 38% after 80 days. Relatively, leaching of gold was improved from 36 to 78% after heap biooxidation. The sequencing results showed there were 28 operational taxonomic units identified the microbial community in the heap. The main genera were Acidithiobacillus, Ferroplasma, Acidiferrobacter and Nitrospira. According to stoichiometry, the content of microorganisms with various functions tended to be balanced. The biomass production rate was 10 g/s, the CO fixation rate was 18 g/s, and the oxygen consumption rate was 60 g/s. This study provides a good basis for the further design and application of heap biooxidation technology.
采用堆浸生物氧化法评价中国安徽省袍岛岭金矿的可浸出性。在中温条件下生物氧化 15000 吨金矿石（直径≤10 毫米）。在微生物群落的协同作用下，砷和硫分别被氧化 42%和 38%，经过 80 天。相对而言，堆浸生物氧化后金的浸出率从 36%提高到 78%。测序结果表明，堆中鉴定出 28 个微生物群落的操作分类单元。主要属为嗜酸硫杆菌、亚铁硫杆菌、嗜酸铁杆菌和硝化螺旋菌。根据化学计量学，各种功能微生物的含量趋于平衡。生物量生成率为 10 g/s，CO 固定率为 18 g/s，耗氧率为 60 g/s。本研究为堆浸生物氧化技术的进一步设计和应用提供了良好的基础。
