alexa Decomposition of 2,4-dichlorophenoxyacetic acid by ozonation, ionizing radiation as well as ozonation combined with ionizing radiation
Environmental Sciences

Environmental Sciences

Journal of Pollution Effects & Control

Author(s): Przemyslaw Drzewicz, Marek Trojanowicz, Robert Zona, Sonja Solar, Peter Gehringer

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Electron beam (EB), ozone (O3) and the combination EB/O3 were used to study the oxidative decomposition of 2,4-dichlorophenoxyacetic acid (2,4-D) in local tap water. Using an EB treatment, a dose of 10 kGy was required for complete 2,4-D degradation, and a 90% conversion of organic chlorine into chloride ions. Using additionally 1.33 mmol dm−3 O3 during irradiation, the same result was achieved with a dose of 2.7 kGy. The yields of products acetate and formate were almost doubled by the combined EB/O3 treatment, compared to those obtained with the same dose by EB irradiation. Gamma radiolysis showed that the degradation dose was proportional to the initial concentration of 2,4-D in the range of 50–2260 μmol dm−3.

This article was published in Radiation Physics and Chemistry and referenced in Journal of Pollution Effects & Control

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