Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/29E06C20-52C7-473D-A8BC-D52AA778D3B4 | - |
| Αναγνωριστικό | http://www.sciencedirect.com/science/article/pii/S0301479712000114 | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.jenvman.2012.01.010 | - |
| Γλώσσα | en | - |
| Μέγεθος | 7 pages | en |
| Τίτλος | Degradation, mineralization and antibiotic inactivation of amoxicillin by UV-A/TiO2 photocatalysis | en |
| Δημιουργός | Dimitrakopoulou Despoina | en |
| Δημιουργός | Δημητρακοπουλου Δεσποινα | el |
| Δημιουργός | Rethemiotaki Eirini | en |
| Δημιουργός | Ρεθεμιωτακη Ειρηνη | el |
| Δημιουργός | Frontistis, Zacharias | en |
| Δημιουργός | Xekoukoulotakis Nikos | en |
| Δημιουργός | Ξεκουκουλωτακης Νικος | el |
| Δημιουργός | Venieri Danai | en |
| Δημιουργός | Βενιερη Δαναη | el |
| Δημιουργός | Mantzavinos Dionysis | en |
| Δημιουργός | Μαντζαβινος Διονυσης | el |
| Εκδότης | Elsevier | en |
| Περίληψη | The UV-A/TiO2 photocatalytic decomposition of amoxicillin (AMX) in aqueous suspensions was investigated. Experiments were performed at antibiotic concentrations between 2.5 and 30 mg/L, eight commercially available TiO2 catalysts at loadings between 100 and 750 mg/L, acidic or near-neutral conditions (pH 5 or 7.5) and two different matrices (ultrapure water and secondary treated effluent) at a photon flux of 8 × 10−4 E/(L min). Of the various catalysts tested, Degussa P25 was highly active, i.e. complete AMX degradation and 93% mineralization could be achieved after 25 and 90 min of reaction, respectively at 10 mg/L AMX and 250 mg/L titania. In general, mineralization was slower than degradation due to the formation of stable transformation by-products. For the range of concentrations studied, initial degradation rates can be approached by a Langmuir–Hinshelwood kinetic model, while the reaction order with respect to AMX shifts from first to zeroth as initial concentration increases from 2.5 to 5 mg/L to higher values. Degradation in treated effluent was partly impeded compared to pure water due to the inherent presence of organic and inorganic constituents that compete for hydroxyl radicals. Although increasing solution pH from 5 to 7.5 had no effect on degradation, it retarded mineralization. The antibiotic activity of AMX prior to and after photocatalytic degradation was tested to three reference bacterial strains, namely Escherichia coli (ATCC 23716), Klebsiella pneumoniae (NCTC 5056) and Enterococcus faecalis (ATCC 14506). The first two were found to be highly resistant at AMX concentrations up to 25 mg/L, while the latter could partly be inactivated at lower AMX concentrations (i.e. 10 mg/L) and/or in the presence of photocatalytic by-products. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2015-11-14 | - |
| Ημερομηνία Δημοσίευσης | 2012 | - |
| Θεματική Κατηγορία | Activity | en |
| Θεματική Κατηγορία | Kinetics | en |
| Θεματική Κατηγορία | Pharmaceuticals | en |
| Θεματική Κατηγορία | Removal | en |
| Θεματική Κατηγορία | Semiconductor | en |
| Θεματική Κατηγορία | Water | en |
| Βιβλιογραφική Αναφορά | D. Dimitrakopoulou, I. Rethemiotaki, Z. Frontistis, N. P. Xekoukoulotakis, D. Venieri and D. Mantzavinos, "Degradation, mineralization and antibiotic inactivation of amoxicillin by UV-A/TiO2 photocatalysis", J. Environment. Manage., vol. 98, pp. 168-174, May 2012. doi:10.1016/j.jenvman.2012.01.010 | en |
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