Photochemical efficiency of Fe(III)-EDDS complex: OH radical production and 17 beta-estradiol degradation

J. Li (1) , Gilles Mailhot (2) , F. Wu , N. Deng

1 PMM - Photochimie moléculaire et macromoléculaire
2 ICCF - Institut de Chimie de Clermont-Ferrand

In this work, the photochemical impact of Fe(III)-EDDS complex on the quantum yield of OH radical formation and on the degradation of 17 beta-estradiol (E2) was investigated. The quantum yield of OH radical formation by photolysis of Fe(III)-EDDS increased with increasing pH in the range of 3.0-9.0. The effect of Fe(III)-EDDS concentration, irradiation wavelength and oxygen on the quantum yield of OH radical formation was also investigated. The degradation of E2 was influenced by the concentration of Fe(III)-EDDS, the solution pH, oxygen and Fe(III) concentrations. This work demonstrates that Fe(III)-EDDS is a photoactive iron species especially at higher pHs and could play an important role in the transformation of organic compounds in the natural environment.

Domaines: Environnement et Société

J. Li, Gilles Mailhot, F. Wu, N. Deng. Photochemical efficiency of Fe(III)-EDDS complex: OH radical production and 17 beta-estradiol degradation. Journal of Photochemistry and Photobiology A: Chemistry, 2010, 212 (1), pp.1-7. ⟨10.1016/j.jphotochem.2010.03.001⟩. ⟨hal-00512293⟩