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=
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.