RT Journal Article
T1 Photodegradation of Ciprofloxacin, Clarithromycin and Trimethoprim: Influence of pH and Humic Acids
A1 Rodríguez López, Lucía
A1 Cela Dablanca, Raquel
A1 Núñez Delgado, Avelino
A1 Álvarez Rodríguez, Esperanza
A1 Fernández Calviño, David
A1 Arias Estévez, Manuel
K1 Antibiotics
K1 Degradation
K1 Electrochemical environment
K1 Emerging pollutants
K1 Organic matter
AB In view of the rising relevance of emerging pollutants in the environment, this work studies the photodegradation of three antibiotics, evaluating the effects of the pH of the medium and the concentration of dissolved organic matter. Simulated light (with a spectrum similar to that of natural sunlight) was applied to the antibiotics Ciprofloxacin (Cip), Clarithromycin (Cla) and Trimethoprim (Tri), at three different pH, and in the presence of different concentrations of humic acids. The sensitivity to light followed the sequence: Cip > Cla > Tri, which was inverse for the half-life (Tri > Cla > Cip). As the pH increased, the half-life generally decreased, except for Cla. Regarding the kinetic constant k, in the case of Cip and Tri it increased with the rise of pH, while decreased for Cla. The results corresponding to total organic carbon (TOC) indicate that the complete mineralization of the antibiotics was not achieved. The effect of humic acids was not marked, slightly increasing the degradation of Cip, and slightly decreasing it for Tri, while no effect was detected for Cla. These results may be relevant in terms of understanding the evolution of these antibiotics, especially when they reach different environmental compartments and receive sunlight radiation
PB MDPI
YR 2021
FD 2021-05-21
LK https://hdl.handle.net/10347/46194
UL https://hdl.handle.net/10347/46194
LA eng
NO Rodríguez-López, L.; Cela-Dablanca, R.; Núñez-Delgado, A.; Álvarez-Rodríguez, E.; Fernández-Calviño, D.; Arias-Estévez, M. Photodegradation of Ciprofloxacin, Clarithromycin and Trimethoprim: Influence of pH and Humic Acids. Molecules 2021, 26, 3080. https://doi.org/10.3390/molecules 26113080
NO This research was funded by the SPANISH MINISTRY OF SCIENCE, INNOVATION AND UNIVERSITIES, grant numbers RTI2018-099574-B-C21 and RTI2018-099574-B-C22. It also received funds from the European Regional Development Fund (ERDF) (FEDER in Spain), being a complement to the previous grants, without additional grant number
DS Minerva
RD 21 may 2026