The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Production of Abundant Hydroxyl Radicals from Oxygenation of Subsurface Sediments
Abstract
Hydroxyl radicals (•OH) play a crucial role in the fate of redox-active substances in the environment. Studies of the •OH production in nature has been constrained to surface environments exposed to light irradiation, but is overlooked in the subsurface under dark. Results of this study demonstrate that abundant •OH is produced when subsurface sediments are oxygenated under fluctuating redox conditions at neutral pH values. The cumulative concentrations of •OH produced within 24 h upon oxygenation of 33 sediments sampled from different redox conditions are 2-670 μmol •OH per kg dry sediment or 6.7-2521 μM •OH in sediment pore water. Fe(II)-containing minerals, particularly phyllosilicates, are the predominant contributor to •OH production. This production could be sustainable when sediment Fe(II) is regenerated by the biological reduction of Fe(III) during redox cycles. Production of •OH is further evident in a field injection-extraction test through injecting oxygenated water into a 23-m depth aquifer. The •OH produced can oxidize pollutants such as arsenic and tetracycline and contribute to CO2 emissions at levels that are comparable with soil respiration. These findings indicate that oxygenation of subsurface sediments is an important source of •OH in nature that has not been previously identified, and •OH-mediated oxidation represents an overlooked process for substance transformations at the oxic/anoxic interface.
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Cites
Reduction potentials of one-electron couples involving free radicals in aqueous solution
Wardman, P. (1989) · Journal of Physical and Chemical Reference Data · doi:10.1063/1.555843 · Cited by 2,123
Spatial and Temporal Variations of Groundwater Arsenic in South and Southeast Asia
Fendorf, S., Michael, H. A., & van Geen, A. (2010) · Science · doi:10.1126/science.1172974 · Cited by 1,193
Katsoyiannis, I. A., Ruettimann, T., & Hug, S. J. (2008) · Environmental Science & Technology · doi:10.1021/es800649p · Cited by 463
Cited by
Dynamic interactions at the mineral–organic matter interface
Kleber, M., Bourg, I. C., Coward, E. K., Hansel, C. M., Myneni, S. C. B., & Nunan, N. (2021) · Nature Reviews Earth & Environment · doi:10.1038/s43017-021-00162-y · Cited by 1,254
Fe(II) Redox Chemistry in the Environment
Huang, J., Jones, A., Waite, T. D., Chen, Y., Huang, X., Rosso, K. M., Kappler, A., Mansor, M., Tratnyek, P. G., & Zhang, H. (2021) · Chemical Reviews · doi:10.1021/acs.chemrev.0c01286 · Cited by 620
Ouyang, D., Chen, Y., Yan, J., Qian, L., Han, L., & Chen, M. (2019) · Chemical Engineering Journal · doi:10.1016/j.cej.2019.03.235 · Cited by 599
Coupled iron cycling and organic matter transformation across redox interfaces
Dong, H., Zeng, Q., Sheng, Y., Chen, C., Yu, G., & Kappler, A. (2023) · Nature Reviews Earth & Environment · doi:10.1038/s43017-023-00470-5 · Cited by 477
pH Dependence of Arsenic Oxidation by Rice-Husk-Derived Biochar: Roles of Redox-Active Moieties
Zhong, D., Jiang, Y., Zhao, Z., Wang, L., Chen, J., Ren, S., Liu, Z., Zhang, Y., Tsang, D. C. W., & Crittenden, J. C. (2019) · Environmental Science & Technology · doi:10.1021/acs.est.9b00756 · Cited by 288
Metadata
- Authors
- Tong, M., Yuan, S., Ma, S., Jin, M., Liu, D., Cheng, D., Liu, X., Gan, Y., & Wang, Y.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-12-18
- Volume
- 50
- Issue
- 1
- Pages
- 214-221
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2340542865
- Cited by
- 496
- References
- 3
- FWCI
- 7.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tong, M., Yuan, S., Ma, S., Jin, M., Liu, D., Cheng, D., Liu, X., Gan, Y., & Wang, Y. (2016). Production of Abundant Hydroxyl Radicals from Oxygenation of Subsurface Sediments. Environmental Science & Technology. https://doi.org/10.1021/acs.est.5b04323
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