Elucidation of Iron(III) Bioleaching Properties of Gram-Positive Bacteria

Jing，Hao1; Liu，Zhao1; Chen，Jun1,2; Ho，Chun Loong1,2

2022

10.1021/acsomega.2c03413

ACS Omega   Impact Factor & Quartile

2470-1343

2470-1343

Microbial-based iron reduction is an emerging technology used as an alternative to conventional chemical-based iron reduction. The iron reduction in kaolin refinement is vital for enhancing its commercial value. Extensive studies on microbial-based iron reduction mainly focus on Gram-negative bacteria, whereas little is understood about Gram-positive bacteria's mechanism and potential application. This study aims to investigate the iron-reducing mechanism of two Gram-positive bacterial isolates, Bacillus cereus (B. cereus) and Staphylococcus aureus (S. aureus). By varying the growth environment of bacteria and monitoring the biochemical changes during the process of iron reduction, the results show that Gram-positive bacterial iron reduction performance depends on the medium composition, differing from Gram-negative bacteria-based reduction processes. Nitrogen-rich medium facilitates the microbial basification of the medium, where the alkaline conditions impact the microbial iron reduction process by altering the gene expression involved in intracellular pH homeostasis and microbial growth. This discovery will contribute to the mineral refining processes and promote the development of microbial-based bioprocesses for ore purification, while also laying the foundation for investigating other Gram-positive bacterial iron-reducing ability.

SCI

English

First

[22050410270] ; [KQTD20170810111314625] ; [2019ZT08Y191]

Chemistry

Chemistry, Multidisciplinary

WOS:000873798100001

AMER CHEMICAL SOC

2-s2.0-85140287604

Scopus

1.Department of Biomedical Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
2.Shenzhen Institute of Synthetic Biology,Shenzhen Institutes of Advanced Technology (SIAT),Chinese Academy of Sciences,Shenzhen,518055,China

Jing，Hao,Liu，Zhao,Chen，Jun,et al. Elucidation of Iron(III) Bioleaching Properties of Gram-Positive Bacteria[J]. ACS Omega,2022.

Jing，Hao,Liu，Zhao,Chen，Jun,&Ho，Chun Loong.(2022).Elucidation of Iron(III) Bioleaching Properties of Gram-Positive Bacteria.ACS Omega.

Jing，Hao,et al."Elucidation of Iron(III) Bioleaching Properties of Gram-Positive Bacteria".ACS Omega (2022).