The objective of this research was to evaluate the feasibility of waste chestnut as a new biosorbent to recover platinum from industrial wastewater. This study is a part of a larger project to develop precious metal recovery process using agricultural by-product produced in Korea. Batch-type adsorption experiment was carried out to determine platinum adsorption in an aqueous solution by chestnut shell. Result showed that Freundlich isotherms adequately described platinum adsorption with R 2 of 0.930. The mechanism of platinum adsorption by chestnut shell was evaluated by characterizing surface properties, functional group and chemical composition of chestnut shell using SEM-EDS and FT-IR analyses.