Journal
ULTRASONICS SONOCHEMISTRY
Volume 17, Issue 2, Pages 370-375Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2009.10.002
Keywords
Ultrasound irradiation (US); Electrocatalytic oxidation (EO); Decolorization; Dyes pollutants
Categories
Funding
- National Science Foundation of China [20673041, 20777026]
- National Basic Research Program of China (973 Program) [2007CB613301]
- Program for New Century Excellent Talents in University [NCET-07-0352]
- Key Project of Ministry of Education of China [108097]
- National Natural Science Foundation of China [50525619]
- Hong Kong Polytechnic University [GYX0L]
- Research Grants Council of Hong Kong [U 5204/07E]
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In this study, we developed a novel ultrasound-assisted electrocatalytic oxidation (US-EO) process to decolorize azo dyes in aqueous solution. Rhodamine B was decolorized completely within several minutes in this developed US-EO system. Oxidation parameters such as applied potentials, power of the ultrasound, initial pH of the solution, and initial concentration of RhB were systematically studied and optimized. An obvious synergistic effect was found in decolorization of RhB by the US-EO process when comparing with either ultrasound (US) process or electrocatalytic oxidation (EO) one. Additionally, the decolorization of other azo dyes, such as methylene blue, reactive brilliant red X-3B, and methyl orange, were also effective in the US-EO system. The results indicated that US-EO system was effective for the decolorization of azo dyes, suggesting its great potential in dyeing wastewater treatment. (C) 2009 Elsevier B.V. All rights reserved.
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