Abstract
Preparation of corn husk-based adsorbent for platinum recovery is studied. The adsorbents are prepared and characterized, and the adsorption of platinum onto the adsorbents is examined. Results indicate that hydroxyl and amine groups are responsible for adsorption of platinum onto the adsorbents. Immobilized amine enhances the adsorption and aluminates interfere in adsorption of platinum ions. The adsorption capacity of the adsorbent with immobilized amine for model media and intact solution is 38.5 and 16.2mg Pt/(g adsorbent), respectively. Structural changes of the treated corn husk is explained by Mannich mechanisms. The kinetics of adsorption of Pt follows a pseudo-second-order model.
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