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Oxidation and Mineralization of Mn 2+ Ions Mediated by Pseudomonas putida: Insights from an Experimental Study
Author(s) -
CHEN Xiaoye,
LU Xiancai,
LIU Huan,
LI Juan,
XIANG Wanli,
ZHANG Rui,
LU Jianjun
Publication year - 2017
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13361
Subject(s) - pyrolusite , birnessite , manganese , chemistry , mineralization (soil science) , pseudomonas putida , inorganic chemistry , ferrihydrite , environmental chemistry , nuclear chemistry , manganese oxide , adsorption , organic chemistry , nitrogen , enzyme
The formation of manganese oxides in nature is commonly mediated by microorganisms. In this study, the mineralization of biogenic manganese oxidation mediated by Pseudomanas putida has been experimentally investigated by employing various characterization techniques, including SEM, FESEM, TEM, XRD, and STXM‐NEXAFS. The results indicate that Mn 2+ ions can be oxidized into Mn (IV) minerals (birnessite and pyrolusite) and Mn(III) minerals (hausmannite and feitknechtite), successively. The primary products (birnessite and pyrolusite) further transformed into hausmannite and feitknechtite under Mn 2+ ion‐enriched conditions. However, birnessite and pyrolusite are the end‐products of the continuous microbial oxidation processes. These biogenic Mn oxides are poorly crystallized, which provides them with a high potential for usage in environmental restoration of contaminated soils and waters contaminated with heavy metals. The approaches employed in this study will also enrich genesis research of biological oxidation of Mn(II) species in nature.