抄録
The absorption treatment of copper ions in acidic water solution using rice bran was examined. Rice bran showed a good pH buffer behavior for an acidic aqueous solution of pH=2.0 prepared by the sulfuric acid. Because rice bran contains phosphorus, indicating that the pH buffer action was induced by the phosphate. In addition, Rice bran adsorbed Cu2+ at a the considerable quantity. with heat treatment at 350°C for 6h, Cu2+ that adsorbed on to the rice bran was converted to CuO. The possibility of the effective material recycling of Cu2+ included in the waste acid was indicated.
