Resumo

RAMIREZ LLAMAS, Laura Alicia; JACOBO AZUARA, Araceli  e  MARTINEZ ROSALES, J. Merced. Methyl orange adsorption from aqueous solution on layered double hydroxide. Acta univ [online]. 2015, vol.25, n.3, pp.25-34. ISSN 2007-9621.  https://doi.org/10.15174/au.2015.778.

In this paper, layered double hydroxides (LDH) were synthesized and characterized using techniques of Physisorption of Nitrogen, Infrared, Temperature Programmed Desorption, X-Ray Diffraction, TGA and Immersion Microcalorimetry, in order to determine the basic properties of the adsorbent. The methyl orange (MO) is used as a dye and as a result, it is frequently found in effluents from textile industries. The dye adsorption isotherms on LDH were studied as function of pH and temperature. The maximum adsorption capacity of methyl orange on LDH was carried out at pH 5, and the minimum adsorption capacity at pH 11, being 40.2 mg/g and 22.1 mg/g, respectively. Furthermore, the suitable temperature to promote the adsorption of methyl orange on LDH was at 25 °C, as at 35 °C shows a significant decrease.

Palavras-chave : Layered double hydroxide; methyl orange; dye; adsorption.

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