Evaluation of Decolorization, Mineralization, and Toxicity Reduction of Tropaeolin O in Water by Ozonation with UV Irradiation
Authors: Hsing, Hao-Jan1; Chiang, Pen-Chi1; Chang, E.-E.2; Li, Yi-Shu1
Source: Ozone: Science and Engineering, Volume 28, Number 1, February 2006 , pp. 9-16(8)
Publisher: Taylor and Francis Ltd
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Abstract:
The combination of ozonation with UV irradiation can remove Tropaeolin O (AO6) and its by-products effectively and completely. The ozone dose affects the rate of decolorization, AO6 species removal, and dissolved organic carbon (DOC) reduction significantly. After 240 minutes of ozonation, the average DOC removal efficiency (? DOC ) for O 3 alone was about 0.79, while ? DOC for O 3 /UV was 1.0. The average DOC removal rate was low at early stage of ozonation due to decolorization and low DOC. At later stage of ozonation, average DOC removal rate decreases because of the formation of persistent intermediates. The ozone consumption was consistent with ? DOC . The ratio of ozone consumption to ozone applied decreased from 14 to 12% when ? DOCKeywords: Ozone; Tropaeolin O; UV irradiation; Decolorization; Ozone Consumption Ratio; EC50
Document Type: Research article
DOI: 10.1080/01919510500479056
Affiliations: 1: Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan, ROC 2: Department of Biochemistry, Taipei Medical University, Taipei, Taiwan, ROC
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