Abstract

SALAS-TORT, Dolores; MARZAL-BLANCO, Norma  and  PENEDO-MEDINA, Margarita. Preliminary Study of the Adsorption of Nickel and Cobalt using Charcoal From Foconut Shells. RTQ [online]. 2012, vol.32, n.2, pp.197-209. ISSN 2224-6185.

The department is conducting the study to obtain activated carbon from biomass and coconut shell charcoal from coconut shells to later be used in environmental remediation processes. This work aims to analyze the behavior of the adsorption of nickel and cobalt ions using pyrolyzed coal and coconut shell sulfate solutions of both metals to different conditions of pH and initial concentration. Among the methods used to analyze the influence raised the pH of the solutions of metal sulfates in the equilibrium concentration. Fixed pH levels were 1, 2, 3 and 5. For each pH should then obtain the equilibrium concentrations and the amount of metal adsorbed per unit mass of coal, for different starting solutions. The study results showed that the equilibrium concentration and adsorption capacity of coal increases with increasing initial concentration of the solution. We obtained the adsorption isotherms for nickel and cobalt and their adjustment to the models of Langmuir and Freundlich to different pH. Among the main conclusions are that the experimental results showed that coal pyrolysed coconut shell has broad potential application in the adsorption of nickel and cobalt ions from sulphate solutions of these metals, obtained very high values of % recovery, and resulting solutions with very low concentrations of metal ions.

Keywords : charcoal; adsorption; coconut shells; nickel; cobalt.

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