Oxidation and Mineralization of Mn^2＋ Ions Mediated by Pseudomonasputida： Insights from an Experimental Study

作     者：CHEN Xiaoy LU Xiancai LIU Huan LI Juan XIANG Wanli ZHANG Rui LU Jianjun 

作者机构：MOE Key Laboratory of Surficial Geochemistry School of Earth Sciences and Engineering Nanjing University Nanjing Jiangsu 210093 China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2017年第91卷第4期

页      面：1276-1285页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081704[工学-应用化学] 07[理学] 08[工学] 09[农学] 090203[农学-茶学] 070301[理学-无机化学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 0703[理学-化学] 0902[农学-园艺学] 

基　　金：financial supported by the National Basic Research Program of China(No.2014CB846004) National Natural Science Foundation of China(Grant Nos.41425009 and 41272056) 

主　　题：Pseudomanasputida Mn^2+ microbial oxidation biomineralization 

摘      要：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.