Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/103587
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dc.creatorP. Y. Nguyen
dc.creatorGilda Carvalho
dc.creatorA. C. Reis
dc.creatorO. C. Nunes
dc.creatorM. A. M. Reis
dc.creatorA. Oehmen
dc.date.accessioned2022-09-14T23:37:32Z-
dc.date.available2022-09-14T23:37:32Z-
dc.date.issued2017
dc.identifier.issn0923-9820
dc.identifier.othersigarra:185521
dc.identifier.urihttps://hdl.handle.net/10216/103587-
dc.description.abstractPure cultures have been found to degrade pharmaceutical compounds. However, these cultures are rarely characterized kinetically at environmentally relevant concentrations. This study investigated the kinetics of sulfamethoxazole (SMX) degradation by Achromobacter denitrificans strain PR1 at a wide range of concentrations, from ng/L to mg/L, to assess the feasibility of using it for bioaugmentation purposes. Complete removal of SMX occurred for all concentrations tested, i.e., 150 mg/L, 500 µg/L, 20 µg/L, and 600 ng/L. The reaction rate coefficients (kbio) for the strain at the ng/L SMX range were: 63.4 ± 8.6, 570.1 ± 15.1 and 414.9 ± 124.2 L/g(Formula presented.)·day), for tests fed without a supplemental carbon source, with acetate, and with succinate, respectively. These results were significantly higher than the value reported for non-augmented activated sludge (0.41 L/(g (Formula presented.)·day) with hundreds of ng/L of SMX. The simultaneous consumption of an additional carbon source and SMX suggested that the energetic efficiency of the cells, boosted by the presence of biogenic substrates, was important in increasing the SMX degradation rate. The accumulation of 3-amino-5-methylisoxazole was observed as the only metabolite, which was found to be non-toxic. SMX inhibited the Vibrio fischeri luminescence after 5 min of contact, with EC50 values of about 53 mg/L. However, this study suggested that the strain PR1 still can degrade SMX up to 150 mg/L. The results of this work demonstrated that SMX degradation kinetics by A. denitrificans PR1 compares favorably with activated sludge and the strain is a potentially interesting organism for bioaugmentation for SMX removal from polluted waters. (c) 2017 Springer Science+Business Media Dordrecht
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/Comissão de Coordenação e Desenvolvimento Regional do Norte/P2020|Norte2020-Projetos Integrados ICDT/NORTE-01-0145-FEDER-000005/LEPABE-2-ECO-INNOVATION/LEPABE-2-ECO-INNOVATION
dc.rightsrestrictedAccess
dc.titleImpact of biogenic substrates on sulfamethoxazole biodegradation kinetics by Achromobacter denitrificans strain PR1
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.identifier.doi10.1007/s10532-017-9789-6
dc.identifier.authenticusP-00M-HPT
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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