The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Perfluorooctanesulfonate Degrades in a Laccase-Mediator System
Abstract
Perfluorooctanesulfonate (PFOS) is a compound that has wide applications with extreme persistence in the environment and the potential to bioaccumulate, and could induce adverse effects to ecosystems. We investigated the degradation of PFOS by laccase-induced enzyme catalyzed oxidative humification reactions (ECOHRs) using 1-hydroxybenzotriazole (HBT) as a mediator. Approximately 59% of PFOS was transformed over 162 days of incubation, and the reaction appeared to follow a pseudo-first-order model with reaction rate constant of 0.0066/ d ( r 2 = 0.87) under one condition tested. Using differential absorption spectra and theoretical simulation, we elucidated the interaction between Cu 2+ /Mg 2+ and PFOS, and proposed that Cu 2+ and Mg 2+ could serve as a bridge to bring the negatively charged PFOS and laccase to proximity, thus increasing the chance of radicals that are released from laccase to reach and react with PFOS. In addition, density functional theory modeling showed that PFOS complexation to the metal ions could unlock its helical configuration and decrease the C-C bond energy of PFOS. These changes allow the attack of PFOS C-C backbone by radicals to become easier. On the basis of products identification, we proposed that direct attack of PFOS by the HBT radical initiated the free radical chain reaction processes and led to the formation of fluoride and partially fluorinated compounds. These results suggest that ECOHR is a potential pathway by which PFOS could be deg…
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“Metal ions, Mg2+ and Cu2+, were also tested with PFOS degradation in the laccase-HBT system, resulting in 59% (0.59 µM) degradation in the Cu2+ solution and 35% (0.35 µM) in the Mg2+ solution over 162 days (149).”
From Toward the development of a molecular toolkit for the microbial remediation of per-and polyfluoroalkyl substances (2024) · cites this paper as [149]
In the citing paper
“As is the case for peroxidase-mediated defluorination, in laccase-mediated PFOA and PFOS degradation, the generation of partially fluorinated short-chain compounds was attributed to degradation via a combination of free-radical decarboxylation, coupling, and rearrangement processes (147, 149, 150), although more evidence is needed to understand this mechanism.”
From Toward the development of a molecular toolkit for the microbial remediation of per-and polyfluoroalkyl substances (2024) · cites this paper as [149]
Citations
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Cited by
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Berhanu, A., Mutanda, I., Taolin, J., Qaria, M. A., Yang, B., & Zhu, D. (2023) · Science of The Total Environment · doi:10.1016/j.scitotenv.2022.160010 · Cited by 294
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Removal of PFAS from water by aquatic plants
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Metadata
- Authors
- Luo, Q., Yan, X., Lu, J., & Huang, Q.
- Affiliations
- Interdisciplinary Toxicology Program, Department of Crop and Soil Sciences, University of Georgia, Griffin, Georgia 30223, United States
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-08-27
- Volume
- 52
- Issue
- 18
- Pages
- 10617-10626
- ISSN
- 0013-936X
- 1520-5851
- Cited by
- 103
- References
- 5
- Language
- en
- Funders
- Air Force Civil Engineer Center (FA8903-12-C-0005)
- U.S. Department of Defense (ER-2127, W912HQ-11-C-0022)
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- Luo, Q., Yan, X., Lu, J., & Huang, Q. (2018). Perfluorooctanesulfonate Degrades in a Laccase-Mediator System. Environmental Science & Technology. https://doi.org/10.1021/acs.est.8b00839
