Direct and Indirect Electron Transfer Routes of Chromium(VI) Reduction with Different Crystalline Ferric Oxyhydroxides in the Presence of Pyrogenic Carbon

2022 ◽  
Author(s):  
Zibo Xu ◽  
Yulu Yu ◽  
Xiaoyun Xu ◽  
Daniel C. W. Tsang ◽  
Chengbo Yao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Pyrogenic Carbon ◽  
Chromium Vi

Proton assisted two-electron transfer from hydroxylammonium ion to chromium(VI) through oxygen bridges

1974 ◽  
Vol 96 (13) ◽  
pp. 4136-4142 ◽  
Author(s):  
Robert A. Scott ◽  
G. P. Haight ◽  
J. N. Cooper
Keyword(s):  
Electron Transfer ◽  
Chromium Vi

Impact of Graphitic Structures in Pyrogenic Carbon on Microbial Reduction of Ferrihydrite

2021 ◽  
Author(s):  
wentao yu ◽  
baoliang chen
Keyword(s):  
Electron Transfer ◽  
Pyrolysis Temperature ◽  
Shewanella Oneidensis ◽  
Exchange Capacity ◽  
Microbial Reduction ◽  
Systematic Evaluation ◽  
Extracellular Electron Transfer ◽  
Pyrogenic Carbon ◽  
The Impact

<p>Pyrogenic carbon plays important roles in microbial reduction of ferrihydrite by shuttling electrons in the extracellular electron transfer (EET) processes. Despite its importance, a full assessment on the impact of graphitic structures in pyrogenic carbon on microbial reduction of ferrihydrite has not been conducted. This study is a systematic evaluation of microbial ferrihydrite reduction by Shewanella oneidensis MR-1 in the presence of pyrogenic carbon with various graphitization extents. The results showed that the rates and extents of microbial ferrihydrite reduction were significantly enhanced in the presence of pyrogenic carbon, and increased with increasing pyrolysis temperature. Combined spectroscopic and electrochemical analyses suggested that the rate of microbial ferrihydrite reduction were dependent on the electrical conductivity of pyrogenic carbon (i.e., graphitization extent), rather than the electron exchange capacity. The key role of graphitic structures in pyrogenic carbon in mediating EET was further evidenced by larger microbial electrolysis current with pyrogenic carbon prepared at higher pyrolysis temperatures. This study provides new insights into the electron transfer in the pyrogenic carbon-mediated microbial reduction of ferrihydrite.</p>

scholarly journals Rapid electron transfer by the carbon matrix in natural pyrogenic carbon

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Tianran Sun ◽  
Barnaby D. A. Levin ◽  
Juan J. L. Guzman ◽  
Akio Enders ◽  
David A. Muller ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Carbon Matrix ◽  
Pyrogenic Carbon

Simultaneous Quantification of Electron Transfer by Carbon Matrices and Functional Groups in Pyrogenic Carbon

2018 ◽  
Vol 52 (15) ◽  
pp. 8538-8547 ◽  
Author(s):  
Tianran Sun ◽  
Barnaby D. A. Levin ◽  
Michael P. Schmidt ◽  
Juan J. L. Guzman ◽  
Akio Enders ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Functional Groups ◽  
Simultaneous Quantification ◽  
Pyrogenic Carbon
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