Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

FP5

AQUACAT Résumé de rapport

Project ID: ICA3-CT-2002-10016
Financé au titre de: FP5-INCO 2
Pays: Spain

Testing of Ru (II) strips

Within the framework of this research project, our research group has developed a singlet oxygen photosensitizing material made of porous silicone and an adsorbed polyazaheterocyclic Ru(II) coordination compound [tris(4,7-diphenyl-1,10-phenanthroline) ruthenium(II)]. This photosensitizing material (1.5 m x 4 cm x 2 mm porous silicone strips died with the Ru(II) photosensitizer mentioned above) has been produced at large scale in order to provide our partners with enough material to carry out their water disinfection tests.

The key innovative features of this result are the following:
- The photosensitizing material can be easily installed in the coaxial or fin-type solar reactor prototypes for water disinfection developed in this project.
- The photosensitizing material is very stable when kept in the dark and can be stored for a long time.
- The photosensitizing material has an operational life of at least half a year on a daily use basis.
- The photosensitizing material installed in the prototypes can disinfect at least 20 L of water per day with an accumulated radiation dose of 0.8 MJ/m2. (100 CFU/mL initial bacteria concentration of E. Coli or E Faecalis).
- Comparative disinfection tests carried out with the photosensitizing material prepared in this project and direct solar photolysis or photocatalytic treatment with TiO2 supported on paper show that the photosensitizing material gives the best disinfection results.

Availability of photosensitizing materials with high singlet oxygen production efficiencies and long durability are essential requirements for the development of ecologically-friendly water disinfection technologies based on solar light and singlet oxygen photogeneration. Our research group is currently developing new photosensitizers and immobilization procedures on different polymers in order to extend the lifetime of the photosensitizing material and improve the disinfection efficiency.

Contact

Guillermo ORELLANA, (Department Director)
Tél.: +34-91-3944220
Fax: +34-91-3944103
E-mail