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Biodegradabilidad de efluentes textiles tratados con técnicas de oxidación electroquímica

Biodegradability of textile effluents treated with electrochemical oxidation techniques
Authors: Vilaseca Vallvé, M. Mercedes; Gutiérrez Bouzán, María Carmen; Crespi Rosell, Martin;

Biodegradabilidad de efluentes textiles tratados con técnicas de oxidación electroquímica

Abstract

Dans un travail préalable, l'oxydation électrochimique d'effluents textiles a été rapportée comme une méthode effective pour décolorer les eaux résiduaires, surtout quand elles contiennent des colorants réactifs. Cependant, quelques contrôles devraient être emportés pour vérifier, avant d'appliquer cette technique industriellement, que la quantité de produits toxiques qui peut se produire pendant le traitement ne soit pas excessive. Dans la présente étude, les effluents traités par oxydation électrochimique sont des eaux résiduaires textiles synthétiques qui contiennent des colorants réactifs. Des techniques respirometriques sont employées pour évaluer leur biodégradabilité. Quand l'ion chlorure est présent dans une eau résiduaire de teinture, un traitement électrochimique peut accomplir une bonne décoloration avec un coût raisonnable. En général, les eaux résiduaires maintiennent leur biodégradabilité après avoir éliminé la couleur par un traitement électrochimique, pourvu que ce traitement soit suivi d’une aération pour enlever le chlore. En absence d'ion chlorure, l'aération n'est pas exigée puis ce que la biodégradabilité augmente pendant le traitement électrochimique.

La oxidación electroquímica de efluentes textiles es un método eficaz para la eliminación del color, especialmente cuando el agua residual contiene colorantes reactivos. Sin embargo, antes de la aplicación industrial de esta técnica, deben llevarse a cabo controles para verificar que no se genere una cantidad excesiva de productos tóxicos durante el tratamiento. En este estudio, los efluentes tratados por oxidación electroquímica son aguas residuales textiles sintéticas que contienen colorantes reactivos. Para evaluar su biodegradabilidad, se emplean técnicas respirométricas. Cuando el ión cloruro está presente en el agua residual coloreada, el tratamiento electroquímico puede proporcionar una buena eliminación del color a un coste bajo. En general, el nivel de biodegradabilidad de las aguas residuales aumenta después del tratamiento electroquímico para la eliminación del color siempre que vaya seguido de una aireación para eliminar el cloro. En ausencia del ión cloruro, no se requiere aireación debido a que durante el tratamiento electroquímico, la biodegradabilidad mejora.

In a previous paper, the electrochemical oxidation of textile effluents was reported as an efficient method to remove colour, especially when the wastewater contains reactive dyes. However, before applying industrially this technique, some controls should be carried out in order to verify that no exceeding amounts of toxic products are generated during the treatment. In the present work, effluents treated by electrochemical oxidation are the synthetic textile wastewater containing reactive dyes. Respirometric techniques are employed to evaluate the biodegradability. When chloride ion is present in a dyeing wastewater, an electrochemical treatment can achieve a good colour removal with a reasonable cost. In general, wastewater keeps their biodegradability level after removing colour by an electrochemical treatment, whenever this treatment is followed by an aeration to eliminate the chlorine. In the absence of chloride ion, the aeration is not required since the biodegradability is improved during the electrochemical treatment.

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Spain
Keywords

Àrees temàtiques de la UPC::Enginyeria tèxtil, Aigües residuals, Colorants, Oxidació electroquímica, Biodegradació, Toxicitat

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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