Abstract

CASTELLAR O, Grey Cecilia et al. Evaluation of a commercial activated carbon in the removal of the dye DB2. rev. colombiana cienc. anim. Recia [online]. 2017, vol.9, n.2, pp.164-170. ISSN 2027-4297.  https://doi.org/10.24188/recia.v9.n2.2017.512.

Synthetic dyes used in the manufacture of textiles are an important class of organic compounds often found in bodies of water, as a result of its wide industrial use, becoming agents unfortunately affect the environment. The final disposition of these dyes to water resources should be avoided or minimized; for this purpose, various treatment techniques are used, the adsorption being one of the most used. In this study the direct navy blue dye stirred in aqueous solution onto granular activated carbon at 22 °C ± 1 °C. Batch experiments were conducted to determine the effect of the initial concentration (7,0- 65,0 mgL-1) and pH (5,0 - 9,0) on the adsorption capacity and removal percentage. The experimental data were fitted to models Freundlich adsorption isotherms and Langmuir. The maximum adsorption capacity achieved by the activated carbon was 2, 22 mgg-1 at pH 5,0.

Keywords : Environment; organic compounds; adsorption; adsorption isotherms.

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