生物学杂志

生物学杂志 ›› 2024, Vol. 41 ›› Issue (3): 21-.doi: 10.3969/j.issn.2095-1736.2024.03.021

• 生物冶金专题 • 上一篇    下一篇

不同比例黄铁矿对嗜酸微生物-辉锑矿相互作用的影响研究

王艺蓉1， 陈　璐1， 刘红昌1,2， 周雨行1， 聂珍媛1,2， 陈宇新1， 陈　豪1， 夏金兰1,2   

  1. 1. 中南大学 资源加工与生物工程学院， 长沙 410083；
    2. 中南大学 生物冶金教育部重点实验室， 长沙 410083
  • 出版日期:2024-06-18 发布日期:2024-06-17
  • 通讯作者: 聂珍媛，博士，教授级高级工程师，研究方向为资源、能源和环境微生物技术，E-mail:zynie@csu.edu.cn
  • 作者简介:王艺蓉，硕士研究生，研究方向为资源与环境，E-mail:yirong_w@csu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目（41830318）

Study on the effect of different proportions of pyrite on the interaction between acidophilic microorganisms and stibnite

ANG Yirong1， CHEN Lu1， LIU Hongchang1,2， ZHOU Yuhang1， NIE Zhenyuan1,2，#br# CHEN Yuxin1， CHEN Hao1， XIA Jinlan1,2   

  1. 1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
    2. Key Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha 410083, China
  • Online:2024-06-18 Published:2024-06-17

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摘要： 针对辉锑矿（Sb2S3）的嗜酸微生物溶解过程，研究不同比例黄铁矿（FeS2）对嗜酸微生物-辉锑矿相互作用的影响。结果表明，微生物群落门水平丰度最高的为变形菌门（Proteobacteria），是主要的锑耐受菌；属水平丰度最高的为嗜酸硫杆菌属（Acidithiobacillus），是酸性矿山环境的代表性优势属。SEM-EDS结果表明，微生物作用体系中，Sb2S3∶FeS2为1∶1和1∶2时，矿物残渣表面发现较多腐蚀坑及细微颗粒，且Sb2S3∶FeS2为1∶1时矿物界面反应更强。XRD和XPS结果表明，FeS2促进了嗜酸微生物对Sb2S3的氧化分解及硫的氧化。Tafel极化曲线和交流阻抗结果表明，Sb2S3∶FeS2为1∶1时微生物作用体系腐蚀电流密度最大，电荷转移阻抗最小。结果对理解锑矿区锑的迁移转化和环境归趋，进一步促进锑污染治理技术的发展具有重要意义。

关键词: 辉锑矿, 黄铁矿, 嗜酸微生物, 矿物-微生物相互作用, 微生物群落

Abstract: This study focused on the acidophilic microbial dissolution process of stibnite and investigated the effect of different proportions of pyrite on the interaction between acidophilic microorganisms and stibnite. The results showed that the Proteobacteria had the highest abundance at the phylum level, it was the main stibnite-tolerant bacterium.Acidithiobacillushad the highest level of abundance at the genus level, which was the representative dominant genus in acid mine environments. Additionally, SEM-EDS results showed that for microbial action systems with Sb2S3∶FeS21∶1 and 1∶2 , more corrosion pits and fine particles were found on the surface of mineral residues, and for the microbial action system with Sb2S3∶FeS21∶1, the interfacial reaction between stibnite and pyrite was stronger. XRD and XPS results indicated that the addition of pyrite could promote the oxidative decomposition of stibnite and sulfur oxidation by acidophilic microorganisms. Tafel polarization curves and EIS impedance results showed that when Sb2S3∶FeS2was 1∶1, the microbial system had the highest corrosion current density and the smallest charge-transfer impedance. The above results were of great significance for understanding the migration, transformation, and environmental fate of stibnite in antimony mining areas, and further promoting the development of antimony pollution control technologies.

Key words: stibnite, pyrite, acidophilic microorganisms, mineral-microbe interaction, microbial community

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