Articles | Volume 17, issue 3
Biogeosciences, 17, 683–698, 2020
https://doi.org/10.5194/bg-17-683-2020
Biogeosciences, 17, 683–698, 2020
https://doi.org/10.5194/bg-17-683-2020

Research article 10 Feb 2020

Research article | 10 Feb 2020

High-pH and anoxic conditions during soil organic matter extraction increases its electron-exchange capacity and ability to stimulate microbial Fe(III) reduction by electron shuttling

Yuge Bai et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (13 Dec 2019) by Denise Akob
AR by Anna Wenzel on behalf of the Authors (08 Jan 2020)  Author's response
ED: Publish as is (11 Jan 2020) by Denise Akob

Post-review adjustments

AA: Author's adjustment | EA: Editor approval
AA by Andreas Kappler on behalf of the Authors (31 Jan 2020)   Author's adjustment   Manuscript
EA: Adjustments approved (06 Feb 2020) by Denise Akob
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Short summary
Biogeochemical processes of SOM are key for greenhouse gas emission and water quality. We extracted SOM by water or by NaOH–HCl under oxic–anoxic conditions. Chemical and anoxic extractions lead to higher SOM electron exchange capacities, resulting in stimulation of microbial Fe(III) reduction. Therefore, aqueous pH-neutral SOM extracts should be used to reflect environmental SOM redox processes, and artifacts of chemical extractions need to be considered when evaluating SOM redox processes.
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