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Efficient Decomposition of Environmentally Persistent Perfluorocarboxylic Acids by Use of Persulfate as a Photochemical Oxidant
Abstract
Photochemical decomposition of persistent perfluorocarboxylic acids (PFCAs) in water by use of persulfate ion (S2O8(2-)) was examined to develop a technique to neutralize stationary sources of PFCAs. Photolysis of S2O8(2-) produced highly oxidative sulfate radical anions (SO4-), which efficiently decomposed perfluorooctanoic acid (PFOA) and other PFCAs bearing C4-C8 perfluoroalkyl groups. The major products were F- and CO2; also, small amounts of PFCAs with shorter than initial chain lengths were detected in the reaction solution. PFOA at a concentration of 1.35 mM (typical of that in untreated wastewater after an emulsifying process in fluoropolymer manufacture) was completely decomposed by a photochemical system with 50 mM S2O8(2-) and 4 h of irradiation from a 200-W xenon-mercury lamp. The initial PFOA decomposition rate was 11 times higherthan with photolysis alone. All sulfur-containing species in the reaction solution were eventually transformed to sulfate ions by this method. This method was successfully applied to the decomposition of perfluorononanoic acid contained in a floor wax solution.
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Cites
Environmental applications of semiconductor photocatalysis
Hoffmann, M. R., Martin, S. T., Choi, W., & Bahnemann, D. W. (1995) · Chemical Reviews · doi:10.1021/cr00033a004 · Cited by 18,495
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Boczkaj, G., & Fernandes, A. (2017) · Chemical Engineering Journal · doi:10.1016/j.cej.2017.03.084 · Cited by 1,568
Zhang, T., Chen, Y., Wang, Y., Le Roux, J., Yang, Y., & Croué, J.-P. (2014) · Environmental Science & Technology · doi:10.1021/es501218f · Cited by 798
Li, F., Duan, J., Tian, S., Ji, H., Zhu, Y., Wei, Z., & Zhao, D. (2020) · Chemical Engineering Journal · doi:10.1016/j.cej.2019.122506 · Cited by 707
Oxidative Conversion as a Means of Detecting Precursors to Perfluoroalkyl Acids in Urban Runoff
Houtz, E. F., & Sedlak, D. L. (2012) · Environmental Science & Technology · doi:10.1021/es302274g · Cited by 681
A review of emerging technologies for remediation of PFASs
Ross, I., McDonough, J., Miles, J., Storch, P., Thelakkat Kochunarayanan, P., Kalve, E., Hurst, J., S. Dasgupta, S., & Burdick, J. (2018) · Remediation Journal · doi:10.1002/rem.21553 · Cited by 606
Metadata
- Authors
- Hori, H., Yamamoto, A., Hayakawa, E., Taniyasu, S., Yamashita, N., Kutsuna, S., Kiatagawa, H., & Arakawa, R.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-02-18
- Volume
- 39
- Issue
- 7
- Pages
- 2383-2388
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2048035963
- Cited by
- 595
- References
- 1
- FWCI
- 7.05
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Hori, H., Yamamoto, A., Hayakawa, E., Taniyasu, S., Yamashita, N., Kutsuna, S., Kiatagawa, H., & Arakawa, R. (2005). Efficient Decomposition of Environmentally Persistent Perfluorocarboxylic Acids by Use of Persulfate as a Photochemical Oxidant. Environmental Science & Technology. https://doi.org/10.1021/es0484754
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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