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Manganese-oxidizing microbes and biogenic manganese oxides: characterization, Mn(II) oxidation mechanism and environmental relevance

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Abstract

Manganese oxides are the strongest natural oxidants in our environments aside from oxygen. Most natural manganese oxides are produced through the Mn(II) oxidation process driven by microbes. Biogenic manganese oxides (BioMnOx) are usually amorphous and rich in defects and possess large surface areas, resulting in high oxidative reactivity and strong absorption capacity for many emerging pollutants. Up to date, numerous of Mn(II) oxidation microbes (MnOM) have been isolated and characterized. Both directly enzymatic or indirectly abiotic Mn(II) oxidation processes were found in MnOM, but a systemic summarization about the Mn(II) oxidation mechanism is still lack. Moreover, the differentiation among BioMnOx produced by different MnOM needs to compare. As a potential oxidant and catalyst for pollutants removal, the role of BioMnOx in environmental remediation is also rarely mentioned. In this review, we focus on the Mn(II) oxidation process mediated by different MnOM, including their Mn(II) oxidation characterization and putative mechanism, as well as characterization of BioMnOx, and BioMnOx-related environmental remediation processes.

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Abbreviations

ABTS:

2,2′-Azinobis-(3-ethylbenzthiazoline-6-sulphonic acid)

AHP:

Animal heme peroxidase

AOP:

Advanced oxidation process

AOS:

Average oxidation state

ATR-FTIR:

Attenuated total reflectance Fourier transform infrared

BioMnOx:

Biogenic manganese oxides

C12O:

Catechol 1,2-dioxygenase

C23O:

Catechol 2,3-dioxygenase

DHS:

Downflow hanging sponge

DMP:

2,6-Dimethoxyphenol

DRIFT:

Diffuse-reflectance infrared Fourier transform

EE2:

17α-ethinylestradiol

EPR:

Electron paramagnetic resonance

EPS:

Extracellular polymeric substances

EXAFS:

Extended X-ray absorption fine structure

FTIR:

Fourier transform infrared

HSQC:

Heteronuclear single-quantum correlation

MCO:

Multicopper oxidase

MIC:

Minimum inhibitory concentration

MnOB:

Mn(II)-oxidizing bacteria

MnOM:

Mn(II) oxidation microbes

MnOx:

Manganese oxide

MOB:

Methane-oxidizing bacteria

LBB:

Leucoberbelin blue

NEXAFS:

Near edge X-ray absorption fine structure

NMR:

Nuclear magnetic resonance

OC:

Organic carbon

PMS:

Peroxymonosulfate

PQQ:

Pyrroloquinoline quinone

PZC:

Point of zero charge

RDF:

Radial distribution function

ROS:

Dominant reactive oxygen species

RSBF:

Rapid sand biofiltration

SEM:

Scanning electron microscope

SMP:

Soluble microbial product

STXM:

Scanning transmission X-ray microscopy

TEM:

Transmission electron microscopy

TG:

Thermogravimetric

XAS:

X-ray absorption spectroscopy

XPS:

X-ray photoelectronic spectroscopy

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Acknowledgements

The authors are financially supported by the National Natural Science Foundation of China (No. 41977197) and the Fundamental Research Funds for the Central Universities (DUT20JC49).

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Correspondence to Hao Zhou.

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Zhou, H., Fu, C. Manganese-oxidizing microbes and biogenic manganese oxides: characterization, Mn(II) oxidation mechanism and environmental relevance. Rev Environ Sci Biotechnol 19, 489–507 (2020). https://doi.org/10.1007/s11157-020-09541-1

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  • DOI: https://doi.org/10.1007/s11157-020-09541-1

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