dc.contributor.author | He, Xuexiang | en |
dc.contributor.author | Mezyk, Stephen P. | en |
dc.contributor.author | Michael, Irene | en |
dc.contributor.author | Fatta-Kassinos, Despo | en |
dc.contributor.author | Dionysiou, D. D. | en |
dc.creator | He, Xuexiang | en |
dc.creator | Mezyk, Stephen P. | en |
dc.creator | Michael, Irene | en |
dc.creator | Fatta-Kassinos, Despo | en |
dc.creator | Dionysiou, D. D. | en |
dc.date.accessioned | 2019-04-18T06:19:10Z | |
dc.date.available | 2019-04-18T06:19:10Z | |
dc.date.issued | 2014 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/45525 | |
dc.description.abstract | The extensive production and usage of antibiotics have led to an increasing occurrence of antibiotic residuals in various aquatic compartments, presenting a significant threat to both ecosystem and human health. This study investigated the degradation of selected β-lactam antibiotics (penicillins: ampicillin, penicillin V, and piperacillin | en |
dc.description.abstract | cephalosporin: cephalothin) by UV-254nm activated H2O2 and S2O82− photochemical processes. The UV irradiation alone resulted in various degrees of direct photolysis of the antibiotics | en |
dc.description.abstract | while the addition of the oxidants improved significantly the removal efficiency. The steady-state radical concentrations were estimated, revealing a non-negligible contribution of hydroxyl radicals in the UV/S2O82− system. Mineralization of the β-lactams could be achieved at high UV fluence, with a slow formation of SO42− and a much lower elimination of total organic carbon (TOC). The transformation mechanisms were also investigated showing the main reaction pathways of hydroxylation (+16Da) at the aromatic ring and/or the sulfur atom, hydrolysis (+18Da) at the β-lactam ring and decarboxylation (–44Da) for the three penicillins. Oxidation of amine group was also observed for ampicillin. This study suggests that UV/H2O2 and UV/S2O82− advanced oxidation processes (AOPs) are capable of degrading β-lactam antibiotics decreasing consequently the antibiotic activity of treated waters. " | en |
dc.source | Journal of Hazardous Materials | en |
dc.subject | β-Lactam antibiotics | el |
dc.subject | Hydrogen peroxide | en |
dc.subject | Persulfate | en |
dc.subject | Radical reaction mechanism | en |
dc.subject | UV-254nm | en |
dc.title | Degradation kinetics and mechanism of β-lactam antibiotics by the activation of H2O2 and Na2S2O8 under UV-254nm irradiation | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | http://dx.doi.org/10.1016/j.jhazmat.2014.07.008 | |
dc.description.volume | 279 | |
dc.description.startingpage | 375 | |
dc.description.endingpage | 383 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Πολιτικών Μηχανικών και Μηχανικών Περιβάλλοντος / Department of Civil and Environmental Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Fatta-Kassinos, Despo [0000-0003-1173-0941] | |
dc.gnosis.orcid | 0000-0003-1173-0941 | |