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Using biochemical system to improve cinnabar dissolution.

Y J Wang1, H Y Li, H F Hu

  • 1Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, PR China. wangyujian@cib.ac.cn

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|February 7, 2013
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Summary
This summary is machine-generated.

This study explored using Acidithiobacillus ferrooxidans in a bioreactor to leach cinnabar. Optimal conditions were identified, showing a feasible microbiological method for cinnabar dissolution.

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Area of Science:

  • Environmental Microbiology
  • Biogeochemistry
  • Mineral Processing

Background:

  • Cinnabar (mercuric sulfide) leaching presents environmental challenges.
  • Microbial leaching offers a potential alternative to traditional methods.
  • Acidithiobacillus ferrooxidans is known for its role in metal oxidation.

Purpose of the Study:

  • To investigate the chemobiological leaching of cinnabar using Acidithiobacillus ferrooxidans.
  • To determine the relationship between microbial activity, iron concentration, and cinnabar dissolution.
  • To identify optimal operating parameters for efficient cinnabar bioleaching.

Main Methods:

  • Utilized a chemobiological reactor system.
  • Cultivated Acidithiobacillus ferrooxidans for cinnabar dissolution.
  • Varied dilution rates and iron concentrations to assess their impact.

Main Results:

  • Cinnabar dissolution was significantly correlated with the bioprocess of Acidithiobacillus ferrooxidans and iron concentration.
  • Optimal dilution rate was found to be 0.4/h.
  • Optimal iron concentration ranged from 2-3 g/L.
  • Mechanisms include indirect catalysis by ferric iron and direct adherence oxidation.

Conclusions:

  • The chemobiological reactor system effectively leaches cinnabar.
  • Acidithiobacillus ferrooxidans plays a crucial role in cinnabar dissolution.
  • This microbiological technique presents a feasible and economical approach for cinnabar processing.