Título
Electro-oxidation–plasma treatment for azo dye carmoisine (acid red 14) in an aqueous solution
Autor
Bernardo Frontana-Uribe
JULIAN CRUZ_OLIVARES
Aaron Gomez
Nivel de Acceso
Acceso Abierto
Materias
BIOLOGÍA Y QUÍMICA - (CTI) Azo dye carmoisine - ([Materials (ISSN 1996-1944) 13, 1463]) Advanced oxidation process - ([Materials (ISSN 1996-1944) 13, 1463]) Sequenced process - ([Materials (ISSN 1996-1944) 13, 1463]) Degradation - ([Materials (ISSN 1996-1944) 13, 1463]) Electro-oxidation - ([Materials (ISSN 1996-1944) 13, 1463]) Plasma at atmospheric pressure - ([Materials (ISSN 1996-1944) 13, 1463])
Resumen o descripción
Currently, azo dye Carmoisine is an additive that is widely used in the food processing industry sector. However, limited biodegradability in the environment has become a major concern regarding the removal of azo dye. In this study, the degradation of azo dye Carmoisine (acid red 14) in an aqueous solution was studied by using a sequenced process of electro-oxidation–plasma at atmospheric pressure (EO–PAP). Both the efficiency and effectiveness of the process were compared individually. To ascertain the behavior of azo dye Carmoisine over the degradation process, the variations in its physical characteristics were analyzed with a voltage–current relationship, optical emission spectra (OES) and temperature. On the other hand, chemical variables were analyzed by finding out pH, electrical conductivity, absorbance (UV/VIS Spectrophotometry), chemical oxygen demand (COD), cyclic voltammetry (CV), energy consumption and cost. The sequenced process (EO–PAP) increased degradation efficiency, reaching 100% for azo dye Carmoisine (acid red 14) in 60 min. It was observed that the introduction of small quantities of iron metal ions (Fe2+/Fe3+) as catalysts into the plasma process and the hydrogen peroxide formed in plasma electrical discharge led to the formation of larger amounts of hydroxyl radicals, thus promoting a better performance in the degradation of azo dye. This sequenced process increased the decolorization process.
Fecha de publicación
2020
Tipo de publicación
Artículo
Recurso de información
Formato
application/pdf
Fuente
Materials (ISSN 1996-1944) 13, 1463
Idioma
Inglés
Relación
https://doi.org/10.3390/ma13061463
Repositorio Orígen
Repositorio del Instituto de Química
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