Metal ions have been found to contain mainly in the oil and fat phases component of the subcritical water hydrolysis of marine wastes. The structure of these phases contains special molecules such as fatty acids and triglycerides which have strong affinity to entrap heavy metal cations. In order to reduce environmental emission of metal cations and moreover further using of content free fatty acids, it is very important to develop a removal process of metal ions from various oily systems such as oil phase from subcritical water hydrolysis of seafood wastes, lubricant oil from machinery factories, lubrication processes, and etc. In this work, the equilibrium isotherms for adsorption of Cu2+, Zn2+, and Pb2+ from oil solutions on an chelate ion exchanger DIAION CR11 in both single and multi-components systems were studied experimentally. The ability of this ion exchanger (chelate DIAION CR11) was compared with PEI chitosan beads and PEI chitosan fiber which results showed that CR11 adsorbed metal ions at least four times more than others. The effects of pH, initial metal ion concentration, amount of adsorbent, interfering ions, and hydrolysis pretreatment were also investigated. Under identical conditions the adsorption capacity increased in the order Cu2+ > Zn2+> Pb2+. The ability of this ion exchanger (chelate DIAION CR11) was compared with PEI chitosan beads and PEI chitosan fiber which results showed that CR11 adsorbed metal ions at least four times more than others.