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Alginate hydrogel beads (AB), spent peppermint leaf (PM), and a hybrid adsorbent of these two materials (ABPM), were studied as potential adsorbents of Cobalt (II) ions from aqueous solutions in batch system at room temperature. Equilibrium parameters such as solution pH, mass of adsorbent and the presence of a crowding agent on the adsorption of Co(II) ions were investigated. The results indicate that Co(II) uptake is maximized at pH values higher than 5, with adsorbent doses in the range 120-200 mg. Co(II) adsorption followed the trend AB > ABPM > PM with adsorption percentages of 77%, 71% and 64%, respectively.


This poster, second place winner for STEM individual projects, was presented at the 32nd Semi-Annual Honors and Undergraduate Research Scholars Poster Presentation at New York City College of Technology, May 11, 2020. Mentor: Professor Abel Navarro (Science, Borough of Manhattan Community College).

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