Recovery of some metal ions using gamma-radiation induced grafted waste rubber powder

Waste rubber powder was grafted with different vinyl monomers by using gamm a-radiation. The monomers used for grafting were acrylic acid, acrylamide a nd acrylonitrile. The sodium salt of grafted polyacrylic acid as well as th e amidoxime derivative of grafted polycacrylonitrile were also obtained. Ev aluation of the efficiency of the products obtained to the recovery of some metal ions such as cobalt and nickel as well as to phenol was carried out. It was found that the grafted waste rubber powder is able to recover cobal t and nickel ions from their corresponding salts depending on the type of m onomers used. It was also found that phenol can be reasonably recovered by using rubber powder grafted with acrylamide and amidoxime derivative.