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Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles
Metronidazole (MNZ) is a brand of nitroimidazole antibiotic, which is generally used in clinical applications and extensively used for the treatment of infectious diseases caused by anaerobic bacteria and protozoans. The aim of this investigation was to degrade MNZ with illuminated TiO(2) nanopartic...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4407879/ https://www.ncbi.nlm.nih.gov/pubmed/25908992 http://dx.doi.org/10.1186/s40201-015-0194-y |
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author | Farzadkia, Mahdi Bazrafshan, Edris Esrafili, Ali Yang, Jae-Kyu Shirzad-Siboni, Mehdi |
author_facet | Farzadkia, Mahdi Bazrafshan, Edris Esrafili, Ali Yang, Jae-Kyu Shirzad-Siboni, Mehdi |
author_sort | Farzadkia, Mahdi |
collection | PubMed |
description | Metronidazole (MNZ) is a brand of nitroimidazole antibiotic, which is generally used in clinical applications and extensively used for the treatment of infectious diseases caused by anaerobic bacteria and protozoans. The aim of this investigation was to degrade MNZ with illuminated TiO(2) nanoparticles at different catalyst dosage, contact time, pH, initial MNZ concentration and lamp intensity. Maximum removal of MNZ was observed at near neutral pH. Removal efficiency was decreased by increasing dosage and initial MNZ concentration. The reaction rate constant (k(obs)) was decreased from 0.0513 to 0.0072 min(−1) and the value of electrical energy per order (E(Eo)) was increased from 93.57 to 666.67 (kWh/m(3)) with increasing initial MNZ concentration from 40 to 120 mg/L, respectively. The biodegradability estimated from the BOD5/COD ratio was increased from 0 to 0.098. The photocatalyst demonstrated proper photocatalytic activity even after five successive cycles. Finally, UV/TiO(2) is identified as a promising technique for the removal of antibiotic with high efficiency in a relatively short reaction time. |
format | Online Article Text |
id | pubmed-4407879 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-44078792015-04-24 Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles Farzadkia, Mahdi Bazrafshan, Edris Esrafili, Ali Yang, Jae-Kyu Shirzad-Siboni, Mehdi J Environ Health Sci Eng Research Article Metronidazole (MNZ) is a brand of nitroimidazole antibiotic, which is generally used in clinical applications and extensively used for the treatment of infectious diseases caused by anaerobic bacteria and protozoans. The aim of this investigation was to degrade MNZ with illuminated TiO(2) nanoparticles at different catalyst dosage, contact time, pH, initial MNZ concentration and lamp intensity. Maximum removal of MNZ was observed at near neutral pH. Removal efficiency was decreased by increasing dosage and initial MNZ concentration. The reaction rate constant (k(obs)) was decreased from 0.0513 to 0.0072 min(−1) and the value of electrical energy per order (E(Eo)) was increased from 93.57 to 666.67 (kWh/m(3)) with increasing initial MNZ concentration from 40 to 120 mg/L, respectively. The biodegradability estimated from the BOD5/COD ratio was increased from 0 to 0.098. The photocatalyst demonstrated proper photocatalytic activity even after five successive cycles. Finally, UV/TiO(2) is identified as a promising technique for the removal of antibiotic with high efficiency in a relatively short reaction time. BioMed Central 2015-04-21 /pmc/articles/PMC4407879/ /pubmed/25908992 http://dx.doi.org/10.1186/s40201-015-0194-y Text en © Farzadkia et al.; licensee BioMed Central. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Farzadkia, Mahdi Bazrafshan, Edris Esrafili, Ali Yang, Jae-Kyu Shirzad-Siboni, Mehdi Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title | Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title_full | Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title_fullStr | Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title_full_unstemmed | Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title_short | Photocatalytic degradation of Metronidazole with illuminated TiO(2) nanoparticles |
title_sort | photocatalytic degradation of metronidazole with illuminated tio(2) nanoparticles |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4407879/ https://www.ncbi.nlm.nih.gov/pubmed/25908992 http://dx.doi.org/10.1186/s40201-015-0194-y |
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