Bacterial Biodegradation of Perfluorooctanoic Acid (PFOA) and Perfluorosulfonic Acid (PFOS) Using Pure Pseudomonas Strains

Florentina Laura Chiriac (), Catalina Stoica, Cristina Iftode, Florinela Pirvu, Valentina Andreea Petre, Iuliana Paun, Luoana Florentina Pascu, Gabriela Geanina Vasile and Mihai Nita-Lazar
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Florentina Laura Chiriac: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Catalina Stoica: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Cristina Iftode: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Florinela Pirvu: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Valentina Andreea Petre: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Iuliana Paun: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Luoana Florentina Pascu: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Gabriela Geanina Vasile: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania
Mihai Nita-Lazar: National Research and Development Institute for Industrial Ecology—ECOIND, Drumul Podu Dambovitei Street 57–73, 060652 Bucharest, Romania

Sustainability, 2023, vol. 15, issue 18, 1-12

Abstract: The principal objective of the present research involved the achievement of high biodegradation degrees of perfluorooctanoic acid (PFOA) and perfluorosulfonic acid (PFOS) using pure individual bacterial strains. The use of such microorganisms can contribute to the improvement of the wastewater treatment process in sewage treatment plants through bioaugmentation or other bioremediation processes. Thus, in this study, we investigated the biodegradation potential of PFOA and PFOS. Bacterial strains tested in this study were from the Pseudomonas genus, namely: Pseudomonas aeruginosa and Pseudomonas putida , due to their known capacity to degrade xenobiotic compounds. The results indicated that Pseudomonas aeruginosa was able to transform 27.9% of PFOA and 47.3% of PFOS in 96 h, while Pseudomonas putida managed to transform 19.0% of PFOA and 46.9% of PFOS in the same time frame. During the biodegradation tests, PFHxA was recognized as the principal biotransformation product of PFOA in the presence of Pseudomonas aeruginosa , and PFPeA, PFPxA and PFHpA were recognized as the biotransformation products in the presence of Pseudomonas putida . For PFOS, only two biotransformation products (PHHxA and PFHpA) were observed as a consequence of biodegradation by both bacterial strains.

Keywords: PFOA; PFOS; pseudomonas strains; biodegradation; kinetics; biotransformation products (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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