?Reaction-Reactor Modeling and Kinetics of 2,4-D Oxidation Using Ozone and UV Radiation?

LOVATO MARÍA, MARTIN CARLOS, CASSANO ALBERTO

Cartagena

Congreso; Solar Energy Conversion and Advanced Oxidation Technologies (SP-SEC-AOTs-1; 2013

SP-AOTs

This work describes the degradation of herbicide 2,4-Dichlorophenoxyacetic Acid (2,4-D) in aqueous solution employing Ozone (O3) based Advanced Oxidation Process (AOP). The mayor objective was to find a comprehensive reaction pathway, identifying the contribution of both reactive species that coexist in this AOP, namely molecular ozone and  the ?OH radical, formed in the O3 decomposition and photolysis. The analysis of samples with and without tertiary butanol (t-BuOH) revealed the influence of ?OH radical reactions. A comparative study was performed, for dissolved O3 (molecular+?OH), O3/UV (?OH enhancement) and O3+t-BuOH (?OH inhibition) processes, taking into account three criteria: (a) percentage conversion of 2,4-D, (b) mineralization rate, and (c) release of chloride ion.