Heavy metal contamination of water resource is of great concern because of the toxic effect to human beings, and other animals and plants in the environment at even very low concentrations. Polymer blending is a very important and widely used method for the modification of polymer materials. In the present work ternary blend of Carboxymethyl cellulose, Polyethylene glycol and Montmorillonite clay was prepared with the crosslinker glutaraldehyde by sol gel method in 1:1:1 ratio and characterized using FTIR spectroscopy, X- Ray diffraction studies, Thermo gravimetric analysis, Differential scanning analysis and Scanning Electron microscopic analysis. Removal of heavy metal copper from aqueous solution using the prepared ternary blend was carried out and the adsorption efficiency was analyzed by varying initial metal ion concentration, adsorption dose, contact time and pH. Isotherm models such as Langmuir and Freundlich were used and equilibrium kinetics studies were also done. The studies revealed that the adsorption data fitted well in Freundlich adsorption isotherm and found to follow pseudo second order.