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UV/Peracetic Acid for Degradation of Pharmaceuticals and Reactive Species Evaluation
Abstract
Peracetic acid (PAA) is a widely used disinfectant, and combined UV light with PAA (i.e., UV/PAA) can be a novel advanced oxidation process for elimination of water contaminants. This study is among the first to evaluate the photolysis of PAA under UV irradiation (254 nm) and degradation of pharmaceuticals by UV/PAA. PAA exhibited high quantum yields (Φ 254 nm = 1.20 and 2.09 mol·Einstein –1 for the neutral (PAA 0 ) and anionic (PAA – ) species, respectively) and also showed scavenging effects on hydroxyl radicals ( k • OH/PAA 0 = (9.33 ± 0.3) × 10 8 M –1 ·s –1 and k • OH/PAA – = (9.97 ± 2.3) × 10 9 M –1 ·s –1 ). The pharmaceuticals were persistent with PAA alone but degraded rapidly by UV/PAA. The contributions of direct photolysis, hydroxyl radicals, and other radicals to pharmaceutical degradation under UV/PAA were systematically evaluated. Results revealed that • OH was the primary radical responsible for the degradation of carbamazepine and ibuprofen by UV/PAA, whereas CH 3 C(═O)O • and/or CH 3 C(═O)O 2 • contributed significantly to the degradation of naproxen and 2-naphthoxyacetic acid by UV/PAA in addition to • OH. The carbon-centered radicals generated from UV/PAA showed strong reactivity to oxidize certain naphthyl compounds. The new knowledge obtained in this study will facilitate further research and development of UV/PAA as a new degradation strategy for water contaminants.
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Buxton, G. V., Greenstock, C. L., Helman, W. P., & Ross, A. B. (1988) · Journal of Physical and Chemical Reference Data · doi:10.1063/1.555805 · Cited by 12,332
Cited by
Cobalt/Peracetic Acid: Advanced Oxidation of Aromatic Organic Compounds by Acetylperoxyl Radicals
Kim, J., Du, P., Liu, W., Luo, C., Zhao, H., & Huang, C.-H. (2020) · Environmental Science & Technology · doi:10.1021/acs.est.0c00356 · Cited by 452
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Metadata
- Authors
- Cai, M., Sun, P., Zhang, L., & Huang, C.-H.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-12-01
- Volume
- 51
- Issue
- 24
- Pages
- 14217-14224
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2768206117
- Cited by
- 506
- References
- 1
- FWCI
- 5.54
- Type
- journal article
- Language
- en
- Open access
- closed
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- Cai, M., Sun, P., Zhang, L., & Huang, C.-H. (2017). UV/Peracetic Acid for Degradation of Pharmaceuticals and Reactive Species Evaluation. Environmental Science & Technology. https://doi.org/10.1021/acs.est.7b04694
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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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