Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 825, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.153767
Keywords
Microorganism; Heavy metal; Metal sulfides nanoparticles; Biohybrid system; Environmental application
Categories
Funding
- National Natural Science Foundation of China [51521006]
- principle of electrical chemical enhancement of Thiobacillus ferrooxidans bacterial ex-situ bioremediation of heavy metal contaminated sediment [51579097]
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This review discusses the mechanisms, influencing factors, and environmental applications of microbe-mediated transformation of metal sulfides. Microorganisms can either promote the oxidation of metal sulfides to increase heavy metal release or transform heavy metals into metal sulfides crystals, thus playing a significant role in environmental protection.
Microorganisms play a key role in the natural circulation of various constituent elements of metal sulfides. Some microorganisms (such as Thiobacillus ferrooxidans) can promote the oxidation of metal sulfides to increase the release of heavy metals. However, other microorganisms (such as Desulfovibrio vulgaris) can transform heavy metals into metal sulfides crystals. Therefore, insight into the metal sulfides transformation mediated by microorganisms is of great significance to environmental protection. In this review, first, we discuss the mechanism and influencing factors of microorganisms transforming heavy metals into metal sulfides crystals in different environments. Then, we explore three microbe-mediated transformation forms of heavy metals to metal sulfides and their environmental applications: (1) transformation to metal sulfides precipitation for metal resource recovery; (2) transformation to metal sulfides nanoparticles (NPs) for pollutant treatment; (3) transformation to metal sulfides-microbe biohybrid system for clean energy production and pollutant remediation. Finally, we further provide critical views on the application of microbe-mediated metal sulfides transformation in the environmental field and discuss the need for future research.
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