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

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

JOURNAL=Frontiers in Microbiology

VOLUME=14

YEAR=2023

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2023.1150849

DOI=10.3389/fmicb.2023.1150849

ISSN=1664-302X

ABSTRACT=<p>Manganese (Mn(II)) pollution has recently increased and requires efficient remediation. In this study, <italic>Serratia marcescens</italic> 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 MnO<sub>2</sub> and MnCO<sub>3</sub>), 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.</p>