ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Electrochemical decolorization of C.I. Acid Orange 3 in the presence of sodium chloride at iridium oxide electrode

Dušan Ž. Mijin, Marina M. Radišić, Nataša Ž. Šekuljica, and Branimir N. Grgur

University of Belgrade, Belgrade, Serbia

 

E-mail: kavur@tmf.bg.ac.rs

Abstract: The electrocatalytic degradation of C.I. Acid Orange 3 from simulated wastewater by indirect electrochemical oxidation using an IrOx electrode was investigated. The effects of different operating parameters on the rate of dye decolorization were studied. The influences of mixing, electrolyte concentration, applied current, and initial dye concentration were examined. The change in dye concentration was followed by ultraviolet–visible spectroscopy, while the formation of reaction intermediates was established using high-performance liquid chromatography–mass spectrometry analysis. Ultraviolet–visible spectroscopy showed a decrease of the absorption peak at 374 nm during the electrolysis and the appearance of a new absorption maximum at 460 nm. The decolorization reaction can be followed only at 460 nm. Four intermediate products (two mono- and two dichlorinated) were detected. At the end of the study, a phytotoxicity assay was performed to determine the effectiveness of the applied method. The results showed that the applied electrochemical treatment of C.I. Acid Orange 3 leads to a decrease in phytotoxicity from 53 to 28%.

Keywords: Chlorination; Dyes; High-pressure liquid chromatography; Mass spectrometry; UV/vis spectroscopy; Phytotoxicity

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-017-0211-y

 

Chemical Papers 71 (11) 2173–2184 (2017)

Thursday, June 13, 2024

IMPACT FACTOR 2021
2.146
SCImago Journal Rank 2021
0.365
SEARCH
Advanced
VOLUMES
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers