An Fe(II)-oxidizing consortium from Wudalianchi volcano spring in Northeast China for bioleaching of Cu and Ni from printed circuit boards (PCBs) with the dominance of Acidithiobacillus spp.

Shuang Zhang, Jian Yang, Boyu Dong, Jiani Yang, Hong Pan, Weidong Wang, Lei Yan*, Ji-Dong Gu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A Fe(II)-oxidizing microbial consortium BYQ was enriched from a spring that is rich in iron (38.57 mg/L) in Wudalianchi volcanic area in Northeast China. Its Fe(II) oxidation potential was evaluated under different conditions and the maximum Fe(II) oxidation rate achieved 1.29 g/L·h. The effectiveness of consortium BYQ on bioleaching performance indicated that simultaneous extraction of 89.09 and 68.52% of Cu and Ni from PCBs was achieved with the maximum leaching rates of 0.46 and 0.032 g/L·d, respectively. The microbial composition dynamic implied Acidithiobacillus spp. invariably dominated the community for more than 96% regardless of subculturing and bioleaching conditions. SEM, XRD and FT-IR detected the surface attack of PCBs and the releasing of Cu and Ni with jarosite formation as one of the minerals during bioleaching. The findings showed the high-efficiency Fe(II) oxidation and PCBs leaching of consortium BYQ, suggesting that the volcanic springs might be rich sources of microorganisms for biotechnological and industrial applications.
Original languageEnglish
JournalInternational Biodeterioration and Biodegradation
DOIs
StatePublished - 1 Feb 2022

Keywords

  • Acidithiobacillus spp
  • Bioleaching performance
  • Volcanic spring
  • Ferrous oxidation potential
  • Printed circuit boards

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