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Laccase induced degradation of perfluorooctanoic acid in a soil slurry

Luo, Qi, Liang, Shangtao, Huang, Qingguo·2018·Journal of Hazardous Materials
DOI 10.1016/j.jhazmat.2018.07.048
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Abstract

Perfluorooctanoic acid (PFOA) can induce undesirable effects to humans and animals and has thus attracted much attention from the public and scientific communities in recent years. Extensive studies have been devoted to exploring PFOA degradation in aqueous phase, while information for that in soil is rather limited. Understanding the transformation of PFOA in soil is important in developing strategies to assess and manage its environmental fate. In this study, we have demonstrated that PFOA can be effectively degraded by enzyme catalyzed oxidative humification reactions (ECOHRs) with a natural organic material, soybean meal, as the mediator. In the presence of soybean meal and laccase, PFOA was degraded 24% in water after 36 days, 40% in soil slurry after 140 days. The water extract of soybean meal contained high concentrations of natural organic mediators and multivalent metal ions, both of which were essential to PFOA degradation by ECOHRs. The ECOHR degradation products of PFOA in soil were identified to be partially fluorinated organic compounds, and the molecular features of the products suggest that the degradation mechanism involves free radical chain reaction processes, which was initiated by direct free radical attacks on the CC bonds in perfluoroalkyl acids.

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Citations

Cites

Research works printed but not linked: 32

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Metadata

Authors
Luo, Q., Liang, S., & Huang, Q.
ORCID
Huang, Qingguo
Venue
Journal of Hazardous Materials
Publisher
Elsevier BV
Published
2018-10
Volume
359
Pages
241-247
ISSN
0304-3894
DOI
10.1016/j.jhazmat.2018.07.048
Cited by
76
References
8
Language
en
Licence
Funders
  • U.S. Department of Defense SERDP (ER-2127, W912HQ-11-C-0022)
  • U.S. Air Force Civil Engineering Center BAA Project (FA8903-12-C-0005)

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