An integrated insight into bioleaching performance of chalcopyrite mediated by microbial factors: Functional types and biodiversity
An integrated insight into bioleaching performance of chalcopyrite mediated by microbial factors: Functional types and biodiversity
复制标题
微生物因素介导的黄铜矿生物浸出性能的综合见解：功能类型和生物多样性
DOI：
10.1016/j.biortech.2020.124219
复制
发表时间：
2021
影响因子：
11.4
通讯作者：
Yin Huaqun
中科院分区：
文献类型：
--
作者：
Tao Jiemeng;Liu Xueduan;Luo Xinyang;Teng Tingkai;Jiang Chengying;Drewniak Lukasz;Yang Zhendong;Yin Huaqun
用6种典型的生物浸出物种对6个功能或生物多样性不同的人工群落进行了改造，以浸出黄铜矿。群落中硫氧化剂的缺乏显著降低了铜的提取率，并且低多样性群落也表现出略差的生物浸出性能。pH值、氧化还原电位、亚铁离子和铜离子的变化表明，该群落具有硫氧化剂和高多样性，对环境适应快，对黄铜矿溶解快。矿物学和微生物参数的综合分析表明，功能类型的微生物在介导黄铜矿溶解的贡献大于微生物多样性。进一步的微生物类型与黄铜矿溶解性能的相关性分析表明，硫氧化剂，尤其是喜温硫杆菌，通过调节溶液的氧化还原电位和pH值等理化因素，可以极大地促进黄铜矿的溶解。该研究为平衡微生物功能类型和生物多样性提高生物浸出效率提供了理论依据。
Six artificial communities with different function or biodiversity were reconstructed by six typical bioleaching species for chalcopyrite leaching. Absence of sulfur oxidizers in communities significantly reduced copper extraction rates, and low diversity communities also exhibited slightly poor bioleaching performances. The variations of pH, redox potential, ferrous and copper ions indicated that the community with both sulfur oxidizers and high diversity showed fast adaptation to the environment and rapid dissolution of chalcopyrite. Integrated analysis of mineralogical and microbial parameters demonstrated that functional types of microorganisms made more contributions in mediating chalcopyrite dissolution than microbial diversity. Further correlation analysis between microbial types and chalcopyrite dissolution performances showed that sulfur oxidizers, especiallyAcidithiobacillus caldus, could greatly accelerate chalcopyrite dissolution by regulating solution physicochemical factors, such as redox potential and pH. This study provided a theoretical basis for improving bioleaching efficiency by balancing microbial functional types and biodiversity.