Biological redox cycling of iron in nontronite and its potential application in nitrate removal.
作者： Linduo Zhao , Hailiang Dong , Ravi K. Kukkadapu , Qiang Zeng , Richard E. Edelmann
关键词: Nitrate 、 Shewanella putrefaciens 、 Electron acceptor 、 Electron donor 、 Inorganic chemistry 、 Nontronite 、 Dissolution 、 Chemistry 、 Bicarbonate 、 Redox
摘要: Biological redox cycling of structural Fe in phyllosilicates is an important but poorly understood process. The objective this research was to study microbially mediated cycles nontronite (NAu-2). During the reduction phase, Fe(III) NAu-2 served as electron acceptor, lactate donor, AQDS shuttle, and dissimilatory Fe(III)-reducing bacterium Shewanella putrefaciens CN32 mediator bicarbonate- PIPES-buffered media. oxidation biogenic Fe(II) donor nitrate acceptor. Nitrate-dependent Fe(II)-oxidizing Pseudogulbenkiania sp. strain 2002 added same For all three cycles, able reversibly undergo without significant dissolution. bioreduced samples occurred two distinct environments, at edges interior structure. Nitrate nitrogen gas coupled with ed...
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