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dc.contributor.authorÁlvarez Esmorís, Cristina
dc.contributor.authorRodríguez López, Lucía 
dc.contributor.authorFernández Calviño, David 
dc.contributor.authorNúñez Delgado, Avelino
dc.contributor.authorÁlvarez Rodríguez, Esperanza
dc.contributor.authorArias Estévez, Manuel 
dc.date.accessioned2022-02-02T13:31:04Z
dc.date.available2022-02-02T13:31:04Z
dc.date.issued2022-01-20
dc.identifier.citationAgronomy, 12(2): 260 (2022)spa
dc.identifier.issn20734395
dc.identifier.urihttp://hdl.handle.net/11093/3008
dc.description.abstractIn this work, the dissipation of the antibiotics doxycycline (DC) (from the group of tetracyclines), enrofloxacin (ENR) (a fluoroquinolone), and sulfamethoxypyridazine (SMP) (a sulfonamide) is investigated both under simulated sunlight and in the dark, at three different pH (4.0, 5.5, and 7.2), and in the presence of different salts and humic acids. The results indicate that all three antibiotics are very sensitive to photodegradation, and this sensitivity increased with rising pH values, from 4.0 to 7.2. The rise in pH also caused an increase in the degradation kinetic constants and a decrease in the half-lives of antibiotics. In general, the half-lives ranged from a few minutes to 6 h, depending on the pH conditions and the specific antibiotic, and followed the sequence DC > SMP > ENR, although at pH 5.5 the sequence changed to SMP > DC > ENR. After 24 h of simulated sunlight, mineralization was always lower than 10%, although the antibiotic was not quantifiable after the same time of exposure to light (24 h), which indicates that intermediate compounds were generated. The effect of the presence of salts on the dissipation of the three antibiotics was negligible for NaCl and NaNO3, while NaHCO3 did favor the dissipation of DC and ENR. The presence of humic acids showed no effect on the dissipation of SMP, and it only slightly increased the dissipation of DC and ENR. These results may be useful in the assessment of the persistence/degradation of the antibiotics studied when they reach different environmental compartments and may suffer exposure to light under different physicochemical conditions.en
dc.description.sponsorshipMinisterio de Economía y Competitividad | Ref. RTI2018–099574-B-C21spa
dc.description.sponsorshipMinisterio de Economía y Competitividad | Ref. RTI2018-099574-B-C22spa
dc.description.sponsorshipMinisterio de Economía, Industria y Competitividad | Ref. RYC-2016–20411spa
dc.language.isoengspa
dc.publisherAgronomyspa
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099574-B-C21/ES
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099574-B-C22/ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013 -2016/RYC-2016-20411/ES
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleDegradation of doxycycline, enrofloxacin, and sulfamethoxypyridazine under simulated sunlight at different pH values and chemical environmentsen
dc.typearticlespa
dc.rights.accessRightsopenAccessspa
dc.identifier.doi10.3390/agronomy12020260
dc.identifier.editorhttps://www.mdpi.com/2073-4395/12/2/260spa
dc.publisher.departamentoBioloxía vexetal e ciencias do solospa
dc.publisher.grupoinvestigacionPranta, Solo e Aproveitamento de Subproductosspa
dc.subject.unesco3209 Farmacologíaspa
dc.subject.unesco23 Química
dc.date.updated2022-02-02T12:25:08Z


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