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Photoelectrocatalytic degradation of chlortetracycline using Ti/TiO2 nanostructured electrodes deposited by means of a Pulsed Laser Deposition process.

Daghrir, Rimeh; Drogui, Patrick; Ka, Ibrahima; El Khakani, My Ali (2012). Photoelectrocatalytic degradation of chlortetracycline using Ti/TiO2 nanostructured electrodes deposited by means of a Pulsed Laser Deposition process. Journal of Hazardous Materials , vol. 199-200 . p. 15-24. DOI: 10.1016/j.jhazmat.2011.10.022.

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Résumé

La transcription des symboles et des caractères spéciaux utilisés dans la version originale de ce résumé n’a pas été possible en raison de limitations techniques. La version correcte de ce résumé peut être lue dans le document original.

Ti/TiO2 electrode was prepared by means of the Pulsed Laser Deposition method and used in a photoelectrocatalytic oxidation (PECO) process in order to degrade chlortetracycline (CTC). The deposited TiO2 coatings were found to be of rutile structure. High treatment efficiency of CTC was achieved by the PECO process compared to the conventional electrochemical oxidation, direct photolysis and photocatalysis processes. Several factors such as current intensity, treatment time, UV lamp position and initial concentration of CTC were investigated. Using a 24 factorial matrix, the best performance for CTC degradation (74.3% of removal) was obtained at a current intensity of 0.5 A during 120 min of treatment time and when the UV lamp was immersed in the solution in the presence of 25 mg L−1 of CTC. The current intensity and treatment time were the main parameters influencing the degradation rate of CTC. Subsequently, a central composite design methodology has been investigated to determine the optimal experimental parameters for CTC degradation. The PECO process applied under optimal conditions (at current intensity of 0.39 A during 120 min with internal position of the UV lamp) is able to oxidize around 74.2 ± 0.57%, of CTC.

Type de document: Article
Informations complémentaires: Résumé avec symboles
Mots-clés libres: chlortetracycline hydrochloride; photoelectrocatalytic oxidation; titanium dioxide film; Pulsed Laser Deposition (PLD)
Centre: Centre Eau Terre Environnement
Date de dépôt: 19 oct. 2018 14:51
Dernière modification: 25 oct. 2018 13:12
URI: http://espace.inrs.ca/id/eprint/7265

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