Human impacts and pollutants can be a source of heavy metal ions accumulating in the environment, which can cause environmental and human health risks to occur. This research considers Napthoquinone Sulfonic Acid (NQSA) Phenyl Semicarbozone (PSC) and Phenyl Thiosemicarbozone (PTSC) ligands attached to anion exchange resin beads at various loading percentages by mass to create chelating resins that can be used to remediate metal ions from aqueous samples. By studying different loading percentages, the maximum effectiveness of the resins can be determined. The extraction of metal ions from an aqueous solution by these chelating resins is studied at an environmentally relevant pH. The chelating resins are contacted with a reaction solution containing heavy metal ions for specified periods of time. The solutions prior to and after contact with the resins are analyzed via ICP-OES to determine the concentration of metal in the solutions. The changes in the concentration are used to calculate a dry-weight distribution, Dw, value, which provides a measure of how effective the resin is at removing the metal from the solution. It is anticipated that differences in the effectiveness of the chelating resins at removing the ions from solution will arise due to difference in the ligand structures and loadings.

Impacts of NQSA-SC and TSC ligand loading on metal ion removal from aqueous solutions by chelating resins

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