ESTUDIO DE LA ADSORCIÓN DE AZUL DE METILENO SOBRE ÓXIDO DE GRAFENO

Cinthia V. Chaparro; Rafael  Cabanzo; Enrique Mejía Ospino

doi:10.17533/udea.rcm.19442

Authors

Cinthia V. Chaparro Industrial University of Santander
Rafael Cabanzo Industrial University of Santander
Enrique Mejía Ospino Industrial University of Santander

DOI:

https://doi.org/10.17533/udea.rcm.19442

Keywords:

Graphene oxide, adsorption, Langmuir isotherm, Methylene blue

Abstract

In this work was studied the capacity of graphene oxide to remove cationic dyes dissolved in water. We use as dye prototype the methylene blue (AM). From the results, it is suggested that the remotion occur via physisorption, due to electrostatic attraction between the oxygen functional groups of

graphene oxide and dye cations. Factors such as initial concentration of the dye, concentration of graphene oxide, oxidation time and pH, volume ratio and contact time between the dye and the graphene oxide were evaluated. Results showed that the adsorption equilibrium is reached in approximately 2 minutes and that the adsorption capacity increases at high pH values. The adsorption process was monitored using UV-Vis spectroscopy and the data were adjusted according to the Langmuir isotherm model. The value determined for the adsorption of AM was 671.14 mg / g and the removal percentage of 88.5 % was achieved for this dye. It was demonstrated that the graphene oxide is an effective adsorbent and could be used to treat effluents contaminated with dyes.

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Author Biographies

Cinthia V. Chaparro, Industrial University of Santander

Atomic and Molecular Spectroscopy Laboratory, Materials and Nanosciences Center, Industrial University of Santander. Bucaramanga, Colombia

Rafael Cabanzo, Industrial University of Santander

Atomic and Molecular Spectroscopy Laboratory, Materials and Nanosciences Center, Industrial University of Santander. Bucaramanga, Colombia

Enrique Mejía Ospino, Industrial University of Santander

Atomic and Molecular Spectroscopy Laboratory, Materials and Nanosciences Center, Industrial University of Santander. Bucaramanga, Colombia

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