The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Degradation of Perfluorooctanesulfonate by Reactive Electrochemical Membrane Composed of Magnéli Phase Titanium Suboxide
Abstract
This study investigated the degradation of perfluorooctanesulfonate (PFOS) in a reactive electrochemical membrane (REM) system in which a porous Magnéli phase titanium suboxide ceramic membrane served simultaneously as the anode and the membrane. Near complete removal (98.30 ± 0.51%) of PFOS was achieved under a cross-flow filtration mode at the anodic potential of 3.15 V vs standard hydrogen electrode (SHE). PFOS removal efficiency during the REM operation is much greater than that of the batch operation mode under the same anodic potential. A systematic reaction rate analysis in combination with electrochemical characterizations quantitatively elucidated the enhancement of PFOS removal in REM operation in relation to the increased electroactive surface area and improved interphase mass transfer. PFOS appeared to undergo rapid mineralization to CO 2 and F –, with only trace levels of short-chain perfluorocarboxylic acids (PFCAs, C 4 –C 8 ) identified as intermediate products. Density functional theory (DFT) simulations and experiments involving free radical scavengers indicated that PFOS degradation was initiated by direct electron transfer (DET) on anode to yield PFOS free radicals (PFOS • ), which further react with hydroxyl radicals that were generated by water oxidation and adsorbed on the anode surface ( • OH ads ). The attack of • OH ads is essential to PFOS degradation, because, otherwise, PFOS • may react with water and revert to PFOS.
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Cites
Polyfluorinated Compounds: Past, Present, and Future
Lindstrom, A. B., Strynar, M. J., & Libelo, E. L. (2011) · Environmental Science & Technology · doi:10.1021/es2011622 · Cited by 1,628
Calafat, A. M., Wong, L.-Y., Kuklenyik, Z., Reidy, J. A., & Needham, L. L. (2007) · Environmental Health Perspectives · doi:10.1289/ehp.10598 · Cited by 1,247
Conder, J. M., Hoke, R. A., Wolf, W. D., Russell, M. H., & Buck, R. C. (2008) · Environmental Science & Technology · doi:10.1021/es070895g · Cited by 1,206
A first global production, emission, and environmental inventory for perfluorooctane sulfonate
Paul, A. G., Jones, K. C., & Sweetman, A. J. (2009) · Environmental Science & Technology · doi:10.1021/es802216n · Cited by 1,096
Post, G. B., Cohn, P. D., & Cooper, K. R. (2012) · Environmental Research · doi:10.1016/j.envres.2012.03.007 · Cited by 639
Steenland, K., Tinker, S., Shankar, A., & Ducatman, A. (2010) · Environmental Health Perspectives · doi:10.1289/ehp.0900940 · Cited by 224
Guelfo, J. L., & Adamson, D. T. (2018) · Environmental Pollution · doi:10.1016/j.envpol.2018.01.066 · Cited by 216
A Map of European Emissions and Concentrations of PFOS and PFOA
Pistocchi, A., & Loos, R. (2009) · Environmental Science & Technology · doi:10.1021/es901246d · Cited by 194
Barazesh, J. M., Prasse, C., & Sedlak, D. L. (2016) · Environmental Science & Technology · doi:10.1021/acs.est.6b02232 · Cited by 166
Cited by
Hydroxyl radicals in anodic oxidation systems: generation, identification and quantification
Xie, J., Zhang, C., & Waite, T. D. (2022) · Water Research · doi:10.1016/j.watres.2022.118425 · Cited by 303
Radjenovic, J., Duinslaeger, N., Avval, S. S., & Chaplin, B. P. (2020) · Environmental Science & Technology · doi:10.1021/acs.est.0c06212 · Cited by 268
Occurrence of per- and polyfluoroalkyl substances in water: a review
Wang, Y., Kim, J., Huang, C.-H., Hawkins, G. L., Li, K., Chen, Y., & Huang, Q. (2022) · Environmental Science: Water Research & Technology · doi:10.1039/d1ew00851j · Cited by 31
Self-citation
Metadata
- Authors
- Shi, H., Wang, Y., Li, C., Pierce, R., Gao, S., & Huang, Q.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-11-15
- Volume
- 53
- Issue
- 24
- Pages
- 14528-14537
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2987832273
- Cited by
- 185
- References
- 9
- FWCI
- 7.45
- Type
- journal article
- Language
- en
- Open access
- closed
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