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An experimental and modelling study of the electrochemical oxidation of pharmaceuticals using a boron-doped diamond anode

Lan, Yandi and Coetsier, Clémence and Causserand, Christel and Groenen Serrano, Karine An experimental and modelling study of the electrochemical oxidation of pharmaceuticals using a boron-doped diamond anode. (2018) Chemical Engineering Journal, 333. 486-494. ISSN 1385-8947

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Official URL: http://dx.doi.org/10.1016/j.cej.2017.09.164

Abstract

This paper deals with an experimental and modelling study on the electrochemical oxidation of refractory pharmaceuticals using a boron-doped diamond (BDD) anode. Different parameters have been investigated, such as the role of salts (sulfates), the presence of other organics, and the influence of applied current intensity. Ciprofloxacin (CIP), Sulfamethoxazole (SMX) and Salbutamol (SALBU) were used for models of pharmaceuticals, and urea as a model for a common organic. The complete removal of pharmaceuticals was observed in all electrolyses under galvanostatic conditions. The presence of common organic waste or other pharmaceutical has no significant impact on the degradation of the CIP target molecule. A mathematical model predicting the temporal concentration variation of organics with electroxidation time has been developed. In this model, different oxidation pathways have been considered: the transfer of electrons (direct oxidation) or of oxygen atoms via the reaction with either hydroxyl radicals or/and with strong electrogenerated oxidants. Excellent correlation with experiments is obtained under all experimental conditions.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at : http://www.sciencedirect.com/science/article/pii/S1385894717316637?via%3Dihub
HAL Id:hal-01680274
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
China scholarship council - Sophie Chambers
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Deposited By: Clemence Coetsier
Deposited On:10 Jan 2018 14:00

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