Towards the complete dechlorination of chloroacetic acids in water by sonoelectrochemical methods: Effect of the anodic material on the degradation of trichloroacetic acid and its by-products

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Title: Towards the complete dechlorination of chloroacetic acids in water by sonoelectrochemical methods: Effect of the anodic material on the degradation of trichloroacetic acid and its by-products
Authors: Esclapez Vicente, María Deseada | Tudela Montes, Ignacio | Díez García, María Isabel | Sáez Bernal, Verónica | Rehorek, Astrid | Bonete, Pedro | González García, José
Research Group/s: Grupo de Fotoquímica y Electroquímica de Semiconductores (GFES)
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Chloroacetic acids | Sonoelectrochemistry | Lead dioxide | Mineralization | Dechlorination
Issue Date: 18-May-2012
Publisher: Elsevier
Citation: Chemical Engineering Journal. 2012, 197: 231-241. https://doi.org/10.1016/j.cej.2012.05.031
Abstract: The total dechlorination of chloroacetic acids in aqueous solutions has been achieved using high-frequency sonoelectrochemical methods. Compared to previous studies, the sonoelectrochemical degradation efficiency was found to be dependent on the ultrasonic frequency and electrodes used. Fractional conversions for trichloroacetic acid and its chlorinated by-products higher than 95% and degradation efficiencies higher than 50% were achieved in all cases where high-frequency sonoelectrochemical experiments were conducted in absence of a background electrolyte. The best results were obtained using lead dioxide as anode and steel as cathode, where both the fractional conversion and degradation efficiency resulted higher than 99.5%. The use of the electricity as unique reactant and the appearing mineralization of the trichloroacetic acids and its by-products make the sonoelectrochemical technology a serious alternative to current technologies.
Sponsor: J.G.-G. and M.D.E. thank Caja de Ahorros del Mediterráneo for its financial support under Ph.D. and visit grants. The authors thank Generalidad Valenciana for its financial support under projects AORG09/051 and ACOMP09/128. M.I.D. thanks to Universidad de Alicante for the Grant BII4770. J.G.-G. and I.T. also thank Generalidad Valenciana for its financial support under Grant FPA/2009/024. We are also grateful to the SS.TT.II. of the University of Alicante.
URI: http://hdl.handle.net/10045/140680
ISSN: 1385-8947 (Print) | 1873-3212 (Online)
DOI: 10.1016/j.cej.2012.05.031
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2012 Published by Elsevier B.V.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.cej.2012.05.031
Appears in Collections:INV - GFES - Artículos de Revistas

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