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Analytical monitoring of the photo-induced degradation of 3,6-dichloro-2-methoxybenzoic acid in homogeneous and heterogeneous systems

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Abstract

The photo-induced degradation of 3,6-dichloro-2-methoxybenzoic acid present at the trace level in aqueous solutions has been studied by comparing the UV photolytic treatment with the processes operating in the presence of either irradiated TiO2 aqueous suspensions and irradiated hydrogen peroxide. The efficiency of the treatments was evaluated by monitoring the kinetics of the primary degradation process, the chloride release and the DOC evolution. The identification of aromatic intermediates by means of GC-MS and LC-MS analysis evidenced a common degradation path for TiO2- and H2O2-mediated degradation, whereas the photolytic mechanism resulted quite different. The mixed TiO2-t-H2O2−UV treatment was found to exhibit the best performances.

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Authors and Affiliations

  1. Dipartimento di Chimica Analitica, Università di Torino, Via Giuria 5, 10125, Torino, Italy

    D. Fabbri, A. Bianco Prevot & E. Pramauro

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  1. D. Fabbri
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  2. A. Bianco Prevot
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  3. E. Pramauro
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Correspondence to A. Bianco Prevot.

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Fabbri, D., Prevot, A.B. & Pramauro, E. Analytical monitoring of the photo-induced degradation of 3,6-dichloro-2-methoxybenzoic acid in homogeneous and heterogeneous systems. Res. Chem. Intermed. 33, 393–405 (2007). https://doi.org/10.1163/156856707779238694

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  • DOI: https://doi.org/10.1163/156856707779238694

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