Abstract
This paper focuses on the heat treatment conditions of waste oyster shells in order to use them as an adsorbent material for ions with negative environmental impacts, such as phosphate, sulfate and cadmium ions. The effective processing of oyster shell surfaces was successfully achieved at temperatures as low as 600 °C with the appropriate nitrogen flow rate. In ion removal tests using oyster shells heat-treated by the proposed method, their ion removal abilities were highest for cadmium, followed by phosphate and then sulfate in order.
