Activated Carbon Promoted Ozonation of Polyphenol Mixtures in Water: Comparison with Single Ozonation

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• 作者：In&eacute ; s Girá ; ldez ; Juan F. Garcí ; a-Araya ; Fernando J. Beltrá ; n
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：November 21, 2007
• 年：2007
• 卷：46
• 期：24
• 页码：8241 - 8247
• 全文大小：225K
• 年卷期：v.46,no.24(November 21, 2007)
• ISSN：1520-5045

文摘

A mixture of polyphenol compounds (gallic acid, tyrosol, and syringic acid) is treated with ozone in waterin the presence of activated carbon (AC). Individual (O₃) and combined (O₃/AC) ozonations have been carriedout following the concentrations of initial compounds, intermediates, ozone, and hydrogen peroxide and totalorganic carbon (TOC). AC ozonation processes significantly improve both polyphenol conversion andmineralization. Hydrogen peroxide formed during the process seems to play an important role in acceleratingthe oxidation rate. Different carboxylic acids are formed as intermediate products. Consumption of ozone perunit mass of carbon removed is reduced in the combined ozonation process.