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Ozonation Kinetics Ofo-phenylphenol in Aqueous Solutions

Magdalena Olak-Kucharczyk, Jacek S. Miller, S. Ledakowicz

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Abstract

This study investigated the oxidation and reaction kinetics of biocide o-phenylphenol (o-PP) during ozonation. The second-order rate constants for direct reaction of molecular ozone with o-PP were determined in homogenous system using classical and competition kinetics. Obtained values of the second-order rate at pH 2 are equal to (3.79 ± 0.23) × 102 M−1 s−1 and (4.42 ± 0.64) × 102 M−1 s−1, for the two methods, respectively. The rate constant for the dissociated form of o-PP was also determined. It was found that the rate constants for the reaction of o-PP with ozone increase significantly with increasing pH.

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What this paper is about

This study investigated the oxidation and reaction kinetics of biocide o-phenylphenol (o-PP) during ozonation. The second-order rate constants for direct reaction of molecular ozone with o-PP were determined in homogenous system using classical and competition kinetics. Obtained values of the second-order rate at pH 2 are equal to (3.79 ± 0.23) × 102 M−1 s−1 and (4.42 ± 0.64) × 102 M−1 s−1, for the two methods, respectively. The rate constant for the dissociated form of o-PP was also determined. It was found that the rate constants for the reaction of o-PP with ozone increase significantly with increasing pH.

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Available abstract

This study investigated the oxidation and reaction kinetics of biocide o-phenylphenol (o-PP) during ozonation. The second-order rate constants for direct reaction of molecular ozone with o-PP were determined in homogenous system using classical and competition kinetics. Obtained values of the second-order rate at pH 2 are equal to (3.79 ± 0.23) × 102 M−1 s−1 and (4.42 ± 0.64) × 102 M−1 s−1, for the two methods, respectively. The rate constant for the dissociated form of o-PP was also determined. It was found that the rate constants for the reaction of o-PP with ozone increase significantly with increasing pH.

Key concepts: Reaction rate constant, Kinetics, Chemistry, Ozone, Aqueous solution, European union, Biocide, Reaction rate

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