The current study aims to improve the quality of wastewater collected from the raw, primary sedimentation tank and secondary sedimentation tank of Hamdan wastewater treatment plant, Basrah, Iraq. Heavy metals contamination is one of the most critical environmental issues. Therefore, appropriate steps need to reduce pollutants in wastewater to acceptable levels before being discharged to the environment. Several treatment methods have been developed recently to adsorb these pollutants. This study reviews the ability of polymer, a new resin (3,3'-(1,4- phenylene) bis(1-(4-(4-hydroxybenzylidene) amino) phenyl) prop-2-en-1-one) to adsorb copper, cadmium and lead from wastewater. The new Schiff base was prepared on polyurethane foam diagnosed by FT-IR and 1H-NMR spectroscopic methods. The polymer has excellent sorption capacities due to the large specific surface area, chemical composition and the removal metals efficiency in varying proportions. For Cd2+, the efficiency removal was 100% in wastewater and the efficiency of removing Cu2+ was 100% in raw wastewater and primary sedimentation tank. The removal efficiency of Pb2+ was 86%, 64% and 79% 79% in raw sewage, primary and secondary sedimentation tank respectively.