INVESTIGADORES
LITTER marta Irene
artículos
Título:
Impact of iron-complex (Fe(III)-NTA) on photoinduced degradation of 4-chlorophenol in aqueous solution.
Autor/es:
O. ABIDA; G.MAILHOT; M. LITTER; M. BOLTE
Revista:
Photochemical and Photobiological Sciences
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: Cambridge; Año: 2006 vol. 5 p. 395 - 402
ISSN:
1474-905X
Resumen:
In this research work, the photochemical impact of Fe(III)nitrilotriacetic acid complex (FeNTA)on the fate of an organic pollutant (4-chlorophenol (4-CP)) was investigated in natural waters. Thequantum yields of the photodecomposition of the FeNTA complex and of Fe(II) formation, by anintra-molecular photoredox process (the first stage of the reaction) are high. This photoredox reactionrepresents the first step of the process leading to 4-CP disappearance. Whereas oxygen does not affectFeNTA photodegradation, 4-CP depletion requires the presence of oxygen. The radical species HOand CO3− responsible of the degradation were identified by ESR spectroscopy under irradiation. Twodifferent wavelength-dependent mechanisms of 4-chlorophenol degradation are proposed. It clearlyappears that under solar irradiation, iron organic complexes like FeNTA can play a significant role onthe fate of the organic compounds present in natural waters.
