USE OF A FLAT PLATE REACTOR (TiO2/GLASS) FOR 2,5-DICHLOROPHENOL DEGRADATION BY SOLAR PHOTOCATALYSIS
The interest in solar photocatalysis degradation of non-biodegradable organic compounds in wastewater has raised due to its high efficiency and acceptable operation costs. The degradation of an aqueous 2,5-Dichlorophenol (2,5-DCP) solution with variable initial concentration (C0 ≤ 98 mg/L) was perfo...
| Autores: | , , , , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/52376 |
| Acesso em linha: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/RICA.2017.33.04.05 |
| Access Level: | acceso abierto |
| Palavra-chave: | heterogeneous photocatalysis sol-gel method reactor dynamics fotocatálisis heterogénea método sol-gel dinámica del reactor |
| Resumo: | The interest in solar photocatalysis degradation of non-biodegradable organic compounds in wastewater has raised due to its high efficiency and acceptable operation costs. The degradation of an aqueous 2,5-Dichlorophenol (2,5-DCP) solution with variable initial concentration (C0 ≤ 98 mg/L) was performed by photolysis and solar photocatalysis, using a flat glass plate (1 m2) impregnated with TiO2 synthetized by the sol-gel method, on a solar photo reactor. Two response variables (chemical oxygen demand and the 2,5-DCP concentration determined at 280 nm) were established by using three factors: slope angle (20º and 26º), flow rate (355 and 407 L/h) and two processes (photolysis and photocatalysis). The latter at high (ħʋprom = 847.4 W/m2) and low (ħʋprom = 453.6 W/m2) solar radiation intensity. The aqueous 2,5-DCP solution was recirculated over the glass plate for 60 min at laminar flow rate, and samples of the aqueous solution were taken every 5 min to determine the variables. Rate constants K1 (min–1) and K2 (mol/L)–1 of first and zero order reaction, respectively, were determined by considering elements originating on reactor dynamics in the evaluation of photocatalytic oxidation kinetics. Degradation percentages of 2,5-DCP over 98 % were achieved by solar photocatalysis |
|---|