In this study, a sustainable composite based on post-consumer polymers and agave fiber was coated with chitosan and used as a removal heavy metal in solution. The polymers were obtained from municipal waste and treated in our laboratory. Blends of polyethylene and polypropylene were used. The agave fibers were residues from tequila production industries. Two approaches were used to obtain a foamed composite in order to increase surface area for coat it with chitosan: a) a chemical blowing agent and b) a template method by salt incorporation and subsequent extraction. Both method were prepared by extrusion and pelletized. The pellets were immersed in a chitosan solution (2 %wt) previously dissolved in 2% v/v CH3COOH solution. This material was used for the Cr(VI) adsorption, the equilibrium adsorption isotherms were conducted in batch systems with initial Cr (VI) concentration between 5 and 500 mg/L. A UV-vis spectrometer was used to obtain the absorbance of formed complex. The coated composites were characterized by scanning electron microscopy (SEM), attenuated total reflectance infrared spectroscopy (ATR-IR), and X-ray photoelectron spectroscopy (XPS). The results of the foamed composite preparation were a high porosity (60%) with the template method and a better incorporation of chitosan (8%) compared to blowing agent (3%). The Cr(VI) adsorption on the chitosan surface is demonstrated by XPS. The adsorption capacity of these materials at low Cr(VI) concentration is practically 100% for both materials. However, at high Cr(VI) concentration the template method is a better technique to prepare this sustainable adsorbent.