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Degradação fotocatalítica de sulfametoxazol, trimetoprima e diclofenaco em solução aquosa

2010; Brazilian Chemical Society; Volume: 33; Issue: 6 Linguagem: Inglês

10.1590/s0100-40422010000600010

1678-7064

Lutécia H. da Cruz, Fernanda G. Henning, Arlene B. dos Santos, Patricio Peralta‐Zamora,

Chemistry and Chemical Engineering

TRIMETHOPRIM AND DICLOFENAC IN AQUOEUS SOLUTIONS.In this work the photocatalytic degradation of sulfametoxazole, trimethoprim and potassium diclofenac was evaluated by using TiO 2 and ZnO photocatalysts.In optimized experimental conditions (pH 4, TiO 2 : 50 mg) the TiO 2 -photocatalysis allowed an almost total degradation of the studied drugs with mineralization of about 80% at reaction times of 120 min.Some mechanistic differences were observed between TiO 2 and ZnO in the degradation study involving potassium diclofenac.At the first reaction times the use of ZnO leads to generation of transient species that strongly absorb in the UV spectral region, a fact not observed in studies involving TiO 2 .