Abstract

ZAMBRANO CAMPITELLI, Miguel Ernesto  and  PEREZ HERNANDEZ, Miguel Manuel. Activated carbon elaboration from coconut shell for removal of methyl orange in aqueous phase. Rev. Int. Contam. Ambient [online]. 2023, vol.39, 54514.  Epub June 05, 2023. ISSN 0188-4999.  https://doi.org/10.20937/rica.54514.

This work shows the generation of activated carbon from coconut shells, using chemical activation with potassium hydroxide under an inert atmosphere. Kinetic adsorption studies were performed for four initial concentrations and equilibrium batch studies in a four-concentration range. For both studies, methyl orange solutions at 40, 80, 200, and 400 mg/L were used. The pseudo-second order model showed the best fit to describe the adsorption process for all the initial concentrations studied. From this result, graphs were plotted to determine the percentage of removal as a function of the amount of adsorbent and the contact time. The intramolecular diffusion model showed that it was not the only mechanism restricting the rate of adsorption. The linear Langmuir equation showed a good fit and calculated the maximum adsorption on the monolayer as 147.013 mg/g.

Keywords : waste; dye; intraparticular; Langmuir; Freundlich; monolayer; Elovich.

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