Photooxidation of 3,3′- and 4,4′-Dimethylbiphenyls in Natural Seawater

F. El Anba-lurot Laboratoire de Chimie Analytique de l'Environnement, Faculté des Sciences et Techniques de St Jérôme, URA C.N.R.S. 1409 Boite 312, 13397, Marseille, Cedex 20, France

M. Guiliano Laboratoire de Chimie Analytique de l'Environnement, Faculté des Sciences et Techniques de St Jérôme, URA C.N.R.S. 1409 Boite 312, 13397, Marseille, Cedex 20, France

P. Doumenq Laboratoire de Chimie Analytique de l'Environnement, Faculté des Sciences et Techniques de St Jérôme, URA C.N.R.S. 1409 Boite 312, 13397, Marseille, Cedex 20, France

G. Mille Laboratoire de Chimie Analytique de l'Environnement, Faculté des Sciences et Techniques de St Jérôme, URA C.N.R.S. 1409 Boite 312, 13397, Marseille, Cedex 20, France

Abstract

Photochemical degradation of 3,3′- and 4.4′-dimethylbiphenyls was studied in natural seawater, without photosensitizer and under artificial UV irradiation. The photooxidation process takes place mainly on benzene ring side chains. Photoproduct analysis, carried out by GC-MS, ETIR and GC-FTIR confirm three successive oxidation states of methyl suhstituents: alcohol, aldehyde and carboxylic acids.

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Photooxidation of 3,3′- and 4,4′-Dimethylbiphenyls in Natural Seawater

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Photooxidation of 3,3′- and 4,4′-Dimethylbiphenyls in Natural Seawater

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