Graphene/chitosan-based hydrogel was synthesized using glutaraldehyde as crosslinking agent in room temperature and it used for removal of Congo red dye from aqueous solution.
Gemini surfactant/GO composites were prepared for the removal of Congo red dye, and show excellent adsorption capacities and reusabilities.
Solution-phase controlled preparation of calcium sulfate dihydrate adsorbent for highly efficient removal of azodye Congo red.