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ARTÍCULO
TITULO

PHOTOCATALYTIC DEGRADATION OF SUGARCANE VINASSE: EVALUATION OF PARAMETERS THAT AFFECT TIO2/UV PHOTOACTIVITY

Renata Padilha de Souza    
Ana Maria Ferrari Lima    
Osvaldo Pezoti    
Veronice Sluzarski Santana    
Marcelino Luiz Gimenez    
Nádia Regina C. Fernandes-Machado (Author)    

Resumen

In this work, photocatalysis was employed in the treatment of vinasse using TiO2 and UV light. The parameters investigated were: TiO2 phases (anatase and rutile) and vinasse pre-treatments (coagulation/flocculation and dilution). The TiO2 catalysts employed were: Kronos without thermal treatment (100% anatase), calcined at 1000°C (33.5% anatase) and immobilized on glass slides (100% anatase); and P25 Degussa without thermal treatment (86.6% anatase). The results showed that natural coagulant removed about 50, 85 and 97% of COD, color and turbidity, respectively. However, pre-treatment followed by photocatalysis with TiO2 87% anatase removed 67% of COD within 48h of irradiation. Bioassays with Artemia salina confirmed the efficacy of the methodology. The treatments reduced the toxicity of vinasse by up to 10 times.

PÁGINAS
pp. 217 - 226
REVISTAS SIMILARES
Water
Applied Sciences
Coatings

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