Photodegradation of sugarcane vinasse: evaluation of the effect of vinasse pre-treatment and the crystalline phase of TiO2
| Autor: | Marcelino Luiz Gimenez, Nádia Regina Camargo Fernandes-Machado, Ana Maria Ferrari Lima, Osvaldo Pezoti, Renata Padilha de Souza, Veronice Sluzarski Santana |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies Anatase Flocculation Chromatography General Computer Science Chemistry General Mathematics 0211 other engineering and technologies General Engineering Vinasse General Physics and Astronomy 02 engineering and technology General Chemistry Thermal treatment 010501 environmental sciences 01 natural sciences law.invention Rutile law Photocatalysis General Earth and Planetary Sciences Calcination Photodegradation 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Acta Scientiarum. Technology. 38:217 |
| ISSN: | 1807-8664 1806-2563 |
| DOI: | 10.4025/actascitechnol.v38i2.27440 |
| Popis: | In this work, photocatalysis was employed in the treatment of vinasse using TiO 2 and UV light. The parameters investigated were: TiO 2 phases (anatase and rutile) and vinasse pre-treatments (coagulation/flocculation and dilution). The TiO 2 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 TiO 2 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. |
| Databáze: | OpenAIRE |
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