Effect of Different Cations on the Adsorption of Dy, Gd, Eu and Sm Ions on Activated Charcoal from Aqueous Solutions

• Main Authors: Riaz Qadeer, Imtiaz Hanif, Javed Hanif
• Format: Article
• Language: English
• Published: Hindawi - SAGE Publishing 1996-02-01
• Series: Adsorption Science & Technology
• Online Access: https://doi.org/10.1177/026361749601300104

The effect of different cations on the adsorption of Dy 3+ , Gd 3+ , Eu 3+ and Sm 3+ ions on activated charcoal from aqueous solutions (pH = 4.0) has been studied at room temperature (295 ± 1 K). Their effect on the adsorption of the metal ions has been correlated with the charge density (Z/r) of the cations. It was observed that cations with a larger Z/r value reduced the adsorption of metal ions more than cations with smaller Z/r values. It was also observed that the ease of adsorption of the metal ions followed the sequence: Dy 3+ > Gd 3+ > Eu 3+ > Sm 3+ . Such data are important in relation to the recovery of metal ions from solution.