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Synthesis and Application of Eco-Friendlyred Onion Skins Azo Dyes for the Removal of Cobalt from Aqueous Media

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  • Gervais Manizabayo

    (Chemistry Department, College of Science and Technology, University of Rwanda, Rwanda)

  • Aimable Niyomugabo

    (Chemical Engineering Department, African Center of Excellence for Sustainable Mining, Copperbelt University, Zambia)

  • Dr. Uche John Chukwu

    (Pure and Industrial Chemistry Department, University of Port Harcourt, Nigeria)

Abstract

The present study investigated the synthesis of low cost and environmental friendly red onion skins azo dyes derivatives and their application as ligands for the extraction of cobalt (II) ions from aqueous media. The effect of pH, agitation time, ligand concentration, and metal ion concentration on Co2+ ions removal efficiency as well as the stoichiometric coefficients were examined. The study revealed that the azo dyes were effective in removing Co2+ ion from aqueous solution. The highest removal efficiencies were obtained within the pH ranges 6-7. The results also showed that the % extraction (% E) of Co2+ions increased with agitation time and concentration of the ligand. The slope analysis carried out on the experimental data demonstrated that Co2+ions reacted with the ligands in 1:2 metals to ligand ratio.

Suggested Citation

  • Gervais Manizabayo & Aimable Niyomugabo & Dr. Uche John Chukwu, 2021. "Synthesis and Application of Eco-Friendlyred Onion Skins Azo Dyes for the Removal of Cobalt from Aqueous Media," International Journal of Research and Innovation in Applied Science, International Journal of Research and Innovation in Applied Science (IJRIAS), vol. 6(7), pages 43-46, July.
    • Handle: RePEc:bjf:journl:v:6:y:2021:i:7:p:43-46
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