Articles | Volume 17, issue 3
https://doi.org/10.5194/bg-17-683-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-17-683-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Feb 2020
Research article |
| 10 Feb 2020
| 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
Geomicrobiology, Center of Applied Geosciences, University of
Tübingen, Tübingen, 72074, Germany
Edisson Subdiaga
Environmental Mineralogy and Chemistry, Center of Applied Geosciences,
University of Tübingen, Tübingen, 72074, Germany
Stefan B. Haderlein
Environmental Mineralogy and Chemistry, Center of Applied Geosciences,
University of Tübingen, Tübingen, 72074, Germany
Heike Knicker
Instituto de Recursos Naturales y Agrobiología de Sevilla,
Consejo Superior de Investigaciones Científicas (IRNAS-CSIC), Seville,
41012, Spain
Andreas Kappler
CORRESPONDING AUTHOR
Geomicrobiology, Center of Applied Geosciences, University of
Tübingen, Tübingen, 72074, Germany
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- Prediction of As and Cd dissolution in various soils under flooding condition J. Ge et al. 10.1016/j.scitotenv.2024.174853
- Variations and driving mechanism of dissolved arsenic in sediment porewater near wetland C. Yu et al. 10.1016/j.apgeochem.2021.105185
- Diverse sedimentary organic matter within the river-aquifer interface drives arsenic mobility along the Meghna River Corridor in Bangladesh T. Varner et al. 10.1016/j.apgeochem.2023.105883
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- Redox controls on anaerobic ammonium oxidation coupled to reduction of natural organic matter in paddy ecosystems S. Nie et al. 10.1007/s00374-023-01760-2
- Visible-Light Enhanced Catalytic Wet Peroxide Oxidation of Natural Organic Matter in the Presence of Al/Fe-Pillared Clay C. Portilla-Delgado et al. 10.3390/catal11050637
- Long-Term Warming Decreases Redox Capacity of Soil Organic Matter R. LaCroix et al. 10.1021/acs.estlett.0c00748
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- Iron reduction as a viable metabolic pathway in Enceladus’ ocean M. Roche et al. 10.1017/S1473550423000125
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Latest update: 20 Nov 2024
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.
Biogeochemical processes of SOM are key for greenhouse gas emission and water quality. We...
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