Artículo
Monitoring the ozonation of phenol solutions at constant pH by different methods
Fecha de publicación:
07/2011
Editorial:
American Chemical Society
Revista:
Industrial & Engineering Chemical Research
ISSN:
0888-5885
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this study the oxidation-reduction potential (ORP) and the proton production (Hp) profiles as a function of time were proposed as indicators to monitor the ozonation of phenol solutions at constant pH. Analysis of the ozone gas outlet stream (XO3), COD, and phenol measurements in the aqueous phase confirm the reliability of the proposed indicators. Results show that the derivative with respect to time of the normalized ozone gas outlet concentration ((1/XO30)dXO3/dt), of the oxidation-reduction potential (dORP/dt) or of its logarithmic value (dLog(ORP)/dt), and of the proton production rate (dHp/dt) exhibited maximum values that were close to the critical ozonation time (tc) determined by XO3, COD, and phenol measurements. Additionally, ORP and XO3 measurements were useful to determine tc for all the tested pHs (5 to 11); however, Hp was useful only for pH values higher than 9. The indicators of the ozonation process proposed in the present work (ORP, Hp) as alternatives of XO3 may be useful to control the addition of ozone, minimizing the ozonation process costs.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CIDCA)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Articulos de CENTRO DE INV EN CRIOTECNOLOGIA DE ALIMENTOS (I)
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Contreras, Edgardo Martin; Bertola, Nora Cristina; Zaritzky, Noemi Elisabet; Monitoring the ozonation of phenol solutions at constant pH by different methods; American Chemical Society; Industrial & Engineering Chemical Research; 50; 16; 7-2011; 9799-9809
Compartir
Altmétricas