Photocatalytic degradation of sulfametoxazole, trimethoprim and diclofenac in aquoeus solutions

Química Nova

Cruz, Lutécia H. da¹  Universidade Federal do Paraná, Curitiba, Brasil¹  Santos, Arlene B. dos¹  Henning, Fernanda G.¹  Peralta-Zamora, Patricio¹ 

关键词: emerging pollutants;    heterogeneous photocatalysis;    drugs.;   

DOI  :  10.1590/S0100-40422010000600010

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this work the photocatalytic degradation of sulfametoxazole, trimethoprim and potassium diclofenac was evaluated by using TiO2 and ZnO photocatalysts. In optimized experimental conditions (pH 4, TiO2: 50 mg) the TiO2-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 TiO2 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 TiO2.

【 授权许可】

Unknown