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Effect of the cathode material on the removal of nitrates by electrolysis in non-chloride media

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dc.contributor.author Lacasa Fernández, Engracia
dc.contributor.author Cañizares Cañizares, Pablo
dc.contributor.author Llanos López, Javier
dc.contributor.author Rodrigo Rodrigo, Manuel Andrés
dc.date.accessioned 2016-06-08T08:14:55Z
dc.date.available 2016-06-08T08:14:55Z
dc.date.issued 2012-04
dc.identifier.citation Journal of Hazardous Materials. Volumes 213–214, 30 April 2012, Pages 478–484 es_ES
dc.identifier.issn 0304-3894
dc.identifier.uri http://hdl.handle.net/10578/9554
dc.description.abstract In this work, the effect of the cathode material (conductive diamond, stainless steel, silicon carbide, graphite or lead) and the current density (150–1400 A m−2) on the removal of nitrates from aqueous solutions is studied by electrolysis in non-divided electrochemical cells equipped with conductive diamond anodes, using sodium sulphate as the electrolyte. The results show that the cathode material very strongly influences both the process performance and the product distribution. The main products obtained are gaseous nitrogen (NO, N2O and NO2) and ammonium ions. Nitrate removal follows first order kinetics, which indicates that the electrolysis process is controlled by mass transfer. Furthermore, the stainless steel and graphite cathodes show a great selectivity towards the production of ammonium ions, whereas the silicon carbide cathode leads to the highest formation of gaseous nitrogen, which production is promoted at low current densities. es_ES
dc.format application/pdf es_ES
dc.language.iso en es_ES
dc.publisher Elsevier es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject Electrolysis es_ES
dc.subject Conductive diamond electrodes es_ES
dc.subject Nitrates es_ES
dc.subject Reduction es_ES
dc.subject Water treatment es_ES
dc.title Effect of the cathode material on the removal of nitrates by electrolysis in non-chloride media es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.identifier.DOI 10.1016/j.jhazmat.2012.02.034

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