Zinc is among the most important heavy-metal pollutants in source and treated water. Recently, the development of an effective Zn removal method from water has been required. For this purpose, bamboo-based carbonaceous materials (shell-activated carbon) were produced with activation using oyster shells. The shell-activated carbon was prepared from bamboo charcoal carbonized at 673 K. The 673 K bamboo charcoal and oyster shells were mixed in a crucible and then the mixture was heated at 1173 K using an electric kiln. The obtained shell-activated carbon and some commercial activated carbons were used in removal tests of zinc from aqueous solutions. The removal effect of zinc by the shell- activated carbon was grater than that by the commercial activated carbons. The reason of increase in the adsorbed zinc amount is that calcium, which was not removed, increased the solution pH in the shell-activated carbon. The removal effect of zinc from an aqueous solution sharply increased between pH 6 to 7. It is expected that shell-activated carbon can be used for waste water treatment in plating factories.
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