Phenol transformation induced by UVA photolysis of the complex FeCl2+ |
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Authors: | Swapan Khanra Claudio Minero Valter Maurino Ezio Pelizzetti Binay K. Dutta Davide Vione |
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Affiliation: | (1) Dipartimento di Chimica Analitica, Università di Torino, Via Pietro Giuria 5, 10125 Torino, Italy;(2) Department of Chemical Engineering, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata, 700009, India;(3) Department of Chemical Engineering, Petronas University of Technology, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia |
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Abstract: | Here we show that the photolysis of FeCl2+ upon UV irradiation of Fe(III) at pH 0.5, yielding Cl• and then Cl2−•, upon further reaction with Cl−, induces phenol degradation. The photolysis of FeCl2+ can be highlighted and studied as the huge interference by FeOH2+ can be avoided under such conditions. Our data allowed the assessment of a photolysis quantum yield for FeCl2+ of 5.8 × 10−4 under UVA irradiation, much lower compared to the literature value of 0.5. The discrepancy can be explained if the photolysis process is efficient but photoformed Fe2+ and Cl• undergo recombination inside the solvent cage. |
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Keywords: | Photochemistry Atmospheric aerosols Surface waters Fe(III) chlorocomplexes |
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