Elimination of representative fluoroquinolones, penicillins, and cephalosporins by solar photo-Fenton: degradation route
- PDF / 716,428 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 25 Downloads / 162 Views
RESEARCH ARTICLE
Elimination of representative fluoroquinolones, penicillins, and cephalosporins by solar photo-Fenton: degradation routes, primary transformations, degradation improvement by citric acid addition, and antimicrobial activity evolution Efraim A. Serna-Galvis 1 & Ana Carolina Cáceres-Peña 1 & Ricardo A. Torres-Palma 1 Received: 13 February 2020 / Accepted: 8 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This work studies the degradation of seven representative antibiotics (ciprofloxacin, norfloxacin, levofloxacin, oxacillin, cloxacillin, cefalexin, and cefadroxil) by solar photo-Fenton process. The removal of antibiotics by the individual components (i.e., light, H2O2, or Fe (II)) and the complete photochemical system (light/H2O2/Fe (II)) was initially evaluated. Then, the effect of citric acid addition to the photo-Fenton system was assessed. In the third place, the primary transformation products for two illustrative cases (ciprofloxacin and oxacillin treated by photo-Fenton) were determined. Also, photo-Fenton in the presence of citric acid was applied to remove antibiotics from a simulated hospital wastewater. It was found that the solar light component induced degradation of ciprofloxacin, norfloxacin, and levofloxacin, but the rest of the considered antibiotics were not reduced by photolysis. In turn, the photo-Fenton system showed a degrading action on all the tested antibiotics. The addition of citric acid to the system significantly increased the removal of antibiotics. Initial degradation products indicated that hydroxyl radical attacked moieties of antibiotics responsible for their antimicrobial activity. Finally, the treatment of hospital wastewater evidenced the high potentiality of photo-Fenton process for degrading antibiotics in aqueous matrices containing elevated concentrations of citric acid. Keywords Water treatment . Antibiotics elimination . Solar advanced oxidation process . Degradation improvement . Hospital wastewater
Introduction The extensive use of antibiotics for preventing and treating human and animal diseases leads to release large amounts of such substances to the environment (Gothwal and Shashidhar
Responsible Editor: Vítor Pais Vilar Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-10069-8) contains supplementary material, which is available to authorized users. * Efraim A. Serna-Galvis [email protected] * Ricardo A. Torres-Palma [email protected] 1
Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Facultad de Ciencias Exactas y Naturales, Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
2015). These compounds are ubiquitous in wastewater from hospital, domestic, livestock, veterinary, and pharmaceutical industry activities (Rizzo et al. 2013; Botero-Coy et al. 2018), which are collected by municipal treatment plants or directly released into the environment. Nowadays, it is well-known that co
Data Loading...
