Organic-inorganic hybrid of chitosan/organoclay bionanocomposites for hexavalent chromium uptake

► Chitosan-clay nanocomposite prepared by solvent casting method. ► Chitosan -clay nanocomposite act as an efficient chromium(VI) removal. ► Possible interaction mechanism of Cr(VI) with chitosan and organoclay. ► Nanocomposite useful for the fabrication and design of wastewater treatment plant. ► Nanocomposite has higher adsorption capability, reusability, and stability.