Adsortion of Copper (II) ions from Waste Polluted Effluents using Calcium-Alginate Modified Shea Butter Husk

Abstract

Shea Butter Husk entrapped in calcium-alginate was effectively used to adsorb Cu (II) ions from an aqueous solution. Instrumental analysis such as FT-IR, XRD and SEM were used to characterize the sorbent. The functional groups responsible for metallic biosorption were majorly –OH, and -COOH. Equilibrium sorption experiment on the time variant of Cu (II) uptake at different concentrations was studied. Percentage removal of Cu increased with an increased in initial pH of 2 and optimum PH of 5 was found to be best before precipitation of the hydroxides. The result obtained for G◦, H◦ and S◦ revealed that the adsorption was spontaneous, endothermic and occurs in an orderly manner Isotherm models like the Langmuir, Freundlich and Tempkin, were investigated and all were in good agreement with the experimental data. The Equilibrium data best fits the Langmuir isotherm with the correlation coefficient at unity. The results indicated that calcium alginate modified Shea butter husks can serve as an adsorbent for the uptake of copper (II) ions from polluted waste streams