Mineralization of the Pharmaceutical beta-Blocker Atenolol by Means of Indirect Electrochemical Advanced Oxidation Process: Parametric and Kinetic Study

Abstract : Atenolol is a beta-blocker that can be found in urban wastewaters and which is not removed efficiently by conventional wastewater treatments. In the present study, electro-Fenton (EF) process was used to assess the degradation and mineralization of pharmaceutical atenolol in aqueous solutions. Electrolyses of 250 mL of atenolol solution (0.17 mM), at initial pH 3, were carried out in an undivided electrolytic cell in galvanostatic mode. Influence of material cathode (graphite, stainless steel, and platinized titanium), applied current (100-500 mA), sulfate dosage (0.01-0.5 M), and catalyst ferrous ions concentration (1-10 mM), on the oxidation efficiency was studied. Atenolol mineralization was monitored by COD dosage. Kinetic analysis indicated that atenolol mineralization followed a pseudo-first order model and the rate constant increased with rising current, ferrous ions concentration (up to 5 mM) and electrolyte concentration. Results showed that graphite cathode, 0.5 M Na2SO4 electrolyte, 0.3 A and 5 mM FeSO4 catalyst were the best conditions for atenolol mineralization. In these optimal conditions, after 240 min more than 87% of the initial COD was removed. The corresponding current efficiency (CE) and specific energy consumption (SEC) were 22.33% and 0.194 kWh/kg COD, respectively. This latter corresponds to 0.078 kWh/m(3) of treated wastewater.
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Separation Science and Technology, Taylor & Francis, 2014, 49 (18), pp.2942-2950. 〈10.1080/01496395.2014.943771〉
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Soumis le : lundi 15 février 2016 - 12:13:41
Dernière modification le : vendredi 15 juin 2018 - 11:22:01

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N. El-Hanafi, L. Mehibel, Huai Z. Li, Souhila Poncin, K. Bensadok. Mineralization of the Pharmaceutical beta-Blocker Atenolol by Means of Indirect Electrochemical Advanced Oxidation Process: Parametric and Kinetic Study. Separation Science and Technology, Taylor & Francis, 2014, 49 (18), pp.2942-2950. 〈10.1080/01496395.2014.943771〉. 〈hal-01274055〉

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