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Project ID: ICA3-CT-2002-10016
Finanziato nell'ambito di: FP5-INCO 2
Paese: Spain

Photocalytic degradation of water organic contaminants in homogeneous and heterogeneous systems

UCM: Our research group has prepared two different Ru(II) complexes of anionic and cationic character, respectively, and its potential for photocatalytic oxidation of organic contaminants in water, via singlet oxygen production, has been evaluated by LCEE.

CIEMAT: A specially designed titania photocatalyst was prepared by coating Ahlstrom non-woven paper, used as a flexible photocatalytic support, with Millennium PC500 anatase. At the same time, a solar CPC photoreactor with the fixed catalyst inside was used. Several types of reactants were treated: 4-chlorophenol as a model organic pollutant; formetanate, a widely used pesticide in horticulture; a mixture of pesticides used in vineyards; and indigo carmine and Congo red, which are complex multifunctional dye molecules.

Besides, other organic pollutants like Orange II and gallic acid were also degraded.
Each reaction was performed simultaneously in a solar CPC slurry photoreactor and in the CPC supported catalyst system. Both photoreactors were used under similar solar exposure to better evaluate and validate the results obtained. This new system, in which the final tedious filtration can actually be avoided, constitutes a good alternative to slurries.

Reported by

Plataforma Solar de Almeria - Ctra. de Senes s/n - Apartado 22