Título

Electrocoagulation-Adsorption to remove anionic and cationic dyes from aqueous solution by PV-Energy

Autor

JOSUE ALONSO CASTAÑEDA DIAZ

THELMA BEATRIZ PAVON SILVA

Edith Eriela Gutiérrez Segura

ARTURO COLIN CRUZ

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

Electrocoagulation - ([2090-9063]) Adsorption - ([2090-9063]) Anionic and cationic dyes - ([2090-9063]) PV-Energy - ([2090-9063]) Research Subject Categories - ([2090-9063]) BIOLOGÍA Y QUÍMICA - (CTI)

Resumen o descripción

The cationic dye malachite green (MG) and the anionic dye Remazol yellow (RY) were removed from aqueous solutions using electrocoagulation-adsorption processes. Batch and continuous electrocoagulation procedures were performed and compared. Carbonaceous materials obtained from industrial sewage sludge and commercial activated carbons were used to adsorb dyes from aqueous solutions in column systems with a 96–98% removal efficiency. The continuous electrocoagulation-adsorption system was more efficient for removing dyes than electrocoagulation alone. The thermodynamic parameters suggested the feasibility of the process and indicated that the adsorption was spontaneous and endothermic (Δ𝑆 = 0.037 and −0.009 for MG and RY, resp.). The Δ𝐺 value further indicated that the adsorption process was spontaneous (−6.31 and −10.48; 𝑇 = 303 K). The kinetic electrocoagulation results and fixed-bed adsorption results were adequately described using a first-order model and a Bohart-Adams model, respectively. The adsorption capacities of the batch and column studies differed for each dye, and both adsorbent materials showed a high affinity for the cationic dye.Thus, the results presented in this work indicate that a continuous electrocoagulation-adsorption system can effectively remove this type of pollutant from water. The morphology and elements present in the sludge and adsorbents before and after dye adsorption were characterized using SEM-EDS and FT-IR.

Editor

Hindawi

Fecha de publicación

21 de agosto de 2017

Tipo de publicación

Artículo

Recurso de información

http://hdl.handle.net/20.500.11799/67741

Fuente

2090-9063

Idioma

Inglés

Relación

Vol.;2017

ID;5184590

DOI;https://doi.org/10.1155/2017/5184590

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

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