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Electrochemical degradation of sodium dodecylbenzene sulfonate on boron doped diamond and lead dioxide anodes

Groenen Serrano, Karine and Savall, André and Weiss-Hortala, Elsa Electrochemical degradation of sodium dodecylbenzene sulfonate on boron doped diamond and lead dioxide anodes. (2006) Journal of New Materials for Electrochemical Systems, 9 (3). 249. ISSN 1480-2422

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In view to carry out a global treatment of used emulsions like that contained in effluents from metallurgic industries, the surfactant behaviour should be known. This paper reports a study of the electrochemical degradation of sodium dodecylbenzenesulfonate (SDBS), a quite common surfactant, encountered in effluents from metal industries. Electrochemical oxidation of solutions containing SDBS at initial concentrations of 25 and 250 ppm was performed in an electrolytic flow cell without separator. A comparison of the performance of PbO2 and BDD used as anodes in the same electrolysis cell are presented. Today PbO2 is a material commercially available, while BDD, not yet accessible at large scale is presented as a good candidate for electrochemical treatment of waste waters polluted by organics. Electrolyses monitored by Total Organic Carbon (TOC), Chemical Oxygen Demand (COD) and Liquid Chromatography (HPLC) measurements, have shown that BDD is more efficient than PbO2 for the same operating conditions. The study, focused on the BDD electrode in neutral or acidic media, under different current densities, have shown that SDBS is cut into small carboxylic acids (maleic, oxalic and formic acids), and that the aliphatic chain is attacked before the aromatic ring.

Item Type:Article
Additional Information:The original PDF of the article is available in: http://www.polymtl.ca/newmaterials/eng/inde
HAL Id:hal-03481528
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
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Deposited On:15 Jul 2009 10:06

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