Efficient Mn(II) removal mechanism by Serratia marcescens QZB-1 at high manganese concentration

Xuejiao Huang; Xuejiao Huang; Xiaofang Nong; Kang Liang; Pengling Chen; Yi Zhao; Daihua Jiang; Jianhua Xiong

doi:10.3389/fmicb.2023.1150849

Frontiers in Microbiology (Apr 2023)

Efficient Mn(II) removal mechanism by Serratia marcescens QZB-1 at high manganese concentration

Xuejiao Huang,
Xuejiao Huang,
Xiaofang Nong,
Kang Liang,
Pengling Chen,
Yi Zhao,
Daihua Jiang,
Jianhua Xiong

Affiliations

Xuejiao Huang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Xuejiao Huang: Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, China
Xiaofang Nong: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Kang Liang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Pengling Chen: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Yi Zhao: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Daihua Jiang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China
Jianhua Xiong: School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi, China

DOI: https://doi.org/10.3389/fmicb.2023.1150849
Journal volume & issue: Vol. 14

Abstract

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Manganese (Mn(II)) pollution has recently increased and requires efficient remediation. In this study, Serratia marcescens QZB-1, isolated from acidic red soil, exhibited high tolerance against Mn(II) (up to 364 mM). Strain QZB-1 removed a total of 98.4% of 18 mM Mn(II), with an adsorption rate of 71.4% and oxidation rate of 28.6% after incubation for 48 h. The strain synthesized more protein (PN) to absorb Mn(II) when stimulated with Mn(II). The pH value of the cultural medium continuously increased during the Mn(II) removal process. The product crystal composition (mainly MnO2 and MnCO3), Mn-O functional group, and element-level fluctuations confirmed Mn oxidation. Overall, strain QZB-1 efficiently removed high concentration of Mn(II) mainly via adsorption and showed great potential for manganese wastewater removal.

Published in Frontiers in Microbiology

ISSN: 1664-302X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Microbiology
Website: http://www.frontiersin.org/journals/microbiology

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