Electroassisted methods for waste destruction: silver(II) and peroxydisulfate reagents in the electrochemically mediated oxidation of polyaromatic sulfonates

Mauro Ravera; Cesare Ciccarelli; Valentina Gianotti; Sonia Scorza; Domenico Osella

doi:10.1016/j.chemosphere.2004.08.035

Electroassisted methods for waste destruction: silver(II) and peroxydisulfate reagents in the electrochemically mediated oxidation of polyaromatic sulfonates

Chemosphere. 2004 Nov;57(7):587-94. doi: 10.1016/j.chemosphere.2004.08.035.

Authors

Mauro Ravera¹, Cesare Ciccarelli, Valentina Gianotti, Sonia Scorza, Domenico Osella

Affiliation

¹ Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale, Amedeo Avogadro, Spalto Marengo 33, 15100 Alessandria, Italy.

PMID: 15488920
DOI: 10.1016/j.chemosphere.2004.08.035

Abstract

The electrochemical oxidation is a promising process for organic pollutants which are recalcitrant to biological degradation. The anodic oxidation of 1,5-naphthalenedisulfonic acid, hereafter NDS, was evaluated at a Pt anode using in situ generated Ag(II) cation or peroxydisulfate [S2O(8)(2-)] anion as mediators. Kinetics of the direct chemical oxidation of NDS in the presence of Na2S2O8, and the identification of some oxidation intermediates are also reported. An analysis of the results shows that Ag(II) is characterized by a high-reaction rates, while [S2O(8)(2-)] performs the oxidation of NDS in a complete way.

Publication types

Comparative Study
Research Support, Non-U.S. Gov't

MeSH terms

Electrolysis / methods*
Kinetics
Oxidation-Reduction
Silver / chemistry*
Sulfonic Acids / chemistry*
Waste Disposal, Fluid / methods*
Water Pollutants, Chemical / analysis*

Substances

Sulfonic Acids
Water Pollutants, Chemical
Silver