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Catalytically Assisted Electrochemical Oxidation of Dye Acid Red B

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Abstract:

This study focused on the degradation of dye Acid Red B in a catalytic electrolysis system with a semiconductor suspended in the electric field. The study showed that the addition of titanium dioxide substantially enhances the degradation of dye and that a semiconductor catalyst can improve electrolysis efficiency. This catalytic system has great potential to be applied commercially with the development of the catalyst. Analytical measurements show that some acidic compounds are produced in the treatment process and that biodegradability of the solution increases after electrolysis because of the breakdown of molecules. The UV–visible spectrum also indicates that the conjugated bonds of dye Acid Red B must be destroyed and that the molecules are broken into small ones. Furthermore, the results from the IR spectrum indicate that the nitrogen–nitrogen double bond of dye Acid Red B must be oxidized to nitrate. Electrochemical measurements show an apparent dye oxidation peak from 0.65 to 0.85 V (versus the saturated calomel electrode) in dye solution (10 g/L), confirming that dye is oxidized in this catalytic system.

Keywords: CATALYST; DYE TREATMENT; ELECTROLYSIS; SEMICONDUCTORS

Document Type: Research Article

DOI: https://doi.org/10.2175/106143002X139811

Publication date: 2002-03-01

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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