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Quantitative Studies of Metal Ion Adsorption on a Chemically Modified Carbon Surface: Adsorption of Cd(II) and Hg(II) on Glutathione Modified Carbon |
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| Authors: | Poobalasingam Abiman Gregory?G Wildgoose Alison Crossley Richard?G Compton |
| Institution: | 1. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1?3QZ, UK;2. Materials Department, University of Oxford, Parks Road, Oxford, OX1?3PH, UK |
| Abstract: | The adsorption behavior of model toxic metal cations namely Cd(II) and Hg(II) on carbon surfaces chemically modified by glutathione was investigated as a function of the concentration of Cd2+ and Hg2+ ions, time and the amount of modified carbon used. Square wave and linear sweep anodic stripping voltammetry was used to monitor the uptake of Cd(II) and Hg(II) ions respectively. Kinetic and adsorption isotherm studies reveal that both Cd(II) and Hg(II) ions undergo similar large adsorption with the modified glutathione carbon material (Glu‐carbon). |
| Keywords: | Adsorption isotherm Glutathione Modified carbon Adsorption rate Cadmium Mercury |