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

Authors

  • Renata Padilha de Souza Universidade Tecnológica Federal do Paraná
  • Ana Maria Ferrari Lima Universidade Tecnológica Federal do Paraná
  • Osvaldo Pezoti Universidade Estadual de Maringá
  • Veronice Sluzarski Santana Universidade Estadual do Oeste do Paraná
  • Marcelino Luiz Gimenez Universidade Estadual de Maringá
  • Nádia Regina C. Fernandes-Machado Universidade Estadual de Maringá

DOI:

https://doi.org/10.4025/actascitechnol.v38i2.27440

Keywords:

vinasse, coagulation/flocculation, photocatalysis, toxicity.

Abstract

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.

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Author Biography

Renata Padilha de Souza, Universidade Tecnológica Federal do Paraná

Departamento de Quí­mica

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Published

2016-04-01

How to Cite

Souza, R. P. de, Lima, A. M. F., Pezoti, O., Santana, V. S., Gimenez, M. L., & Fernandes-Machado, N. R. C. (2016). PHOTOCATALYTIC DEGRADATION OF SUGARCANE VINASSE: EVALUATION OF PARAMETERS THAT AFFECT TIO2/UV PHOTOACTIVITY. Acta Scientiarum. Technology, 38(2), 217–226. https://doi.org/10.4025/actascitechnol.v38i2.27440

Issue

Vol. 38 No. 2 (2016)

Section

Chemistry

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