PHOTOCATALYTIC DEGRADATION OF SUGARCANE VINASSE: EVALUATION OF PARAMETERS THAT AFFECT TIO2/UV PHOTOACTIVITY
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 (10...
| Autores: | , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | Brasil |
| Recursos: | Universidade Estadual de Maringá (UEM) |
| Repositorio: | Acta scientiarum. Technology (Online) |
| Idioma: | inglés |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/27440 |
| Acesso em linha: | http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/27440 |
| Access Level: | acceso abierto |
| Palavra-chave: | vinasse coagulation/flocculation photocatalysis toxicity. Química Analítica Ambiental toxicity |
| Resumo: | 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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