Removal of metal contaminants from aqueous solutions has been a cause of major concern. The water is polluted by human activities; it perturbs water for agriculture and aquatic life. For this purpose, natural biopolymer chitosan (CS) is used; it is industrially attractive because of its capability of removing the metal ions present in the waste contaminant water. Among many other biopolymers, CS is a low-cost absorbent with highest sorption capability for several metal ions. Hence, in this research work, the binary polymer blends were prepared by mixing CS and starch (ST) in 1:1 ratio in the presence and absence of glutaraldehyde cross-linker. The characterization was carried out by using advanced analytical tools, such as Fourier transform infrared spectroscopy, X-ray diffraction, thermo gravimetric analysis, and differential scanning calorimetry. Then, the prepared blend with the cross-linker was used for the removal of cadmium ion from aqueous solutions. The adsorption of cadmium (II) ions by CS/ST was investigated under batch study. The result reveals that the prepared CS/ST blend is an excellent adsorbent of cadmium (II) ions.