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Ozone Decolorization of Mixed-Dye Solutions in a Gas-Induced Reactor

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Ozone decolorization of several mixed two- and three-dye solutions was studied using a newly developed gas-induced reactor. Decolorization kinetics of the mixed-dye solutions, the ozone utilization rate, and chemical oxygen demand (COD) elimination during decolorization were all examined. In the kinetic study, the method of absorption of dye solution during ozonation was used with mixed two-dye solutions. For more complicated mixed three-dye solutions, the method of the American Dye Manufacturers Institute (New York) for determining decolorization kinetics was adopted. Overall, pseudo-first-order kinetics can be used to describe the behavior of mixed-dye solutions during decolorization; however, two-stage decolorization kinetics occur in certain mixed three-dye solutions. Using the gasinduced reactor, a greater than 90% ozone utilization rate was obtained before 90% decolorization was reached. The elimination of COD was approximately 33% before 96% decolorization.


Document Type: Research Article


Publication date: 2001-07-01

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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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