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Demonstrates effective removal of copper and zinc ions in aqueous solutions, indicating potential for environmental applications.
Metal ions in aqueous solutions can be removed by phase transfer-mediation. The aim of this work was to use palm kernel oil (PKO) as an extractant in the presence of a chelating agent [ethylenediaminetetraacetic acid (EDTA)] for the removal of copper (II) and zinc (II) ions from an aqueous solution. The phase transfer of the metal ions was carried out by the addition of aqueous phases to different concentrations of organic phases using standard methods. The effect of the concentration of metal ions on the distribution coefficient and % removal efficiency was studied. The fatty acid composition of PKO was also determined. The results obtained revealed that the distribution coefficients and % removal efficiency of the metal ions increased with an increase in the initial concentrations of the copper (II) and zinc (II) ions. The zinc (II) ions were slightly increased after modification with EDTA. The concentrations of copper (II) and zinc (II) ions increased with an increase in the initial concentration of the aqueous phases and an increase in the volume of PKO, but showed a greater increase with the addition of EDTA. It was also observed that the most abundant fatty acid found in PKO was hexadecenoic acid (palmitic acid-C16:0). The results obtained revealed that PKO modified with EDTA can be an excellent organic solvent for the removal of metal ions from aqueous solutions.
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Ite et al. (2023) studied this question.
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