Superior Sorption of Mn (VII) @ Functionalized Cellulose Nanocrystals Derived from Sustainable Newspapers

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Abstract The fabrication of natural polymer nanocrystals and their versatility stimulated the development of functionalized hybrid nanomaterials for the elimination of harmful contaminants. In this quest, cellulose nanocrystals (CNCs) from environmentally friendly newspapers have been functionalized using a simple two-step reaction with anionic polymer (poly hydrex 6161) to create FCNCs. FTIR, XRD, and SEM are used to describe the structure of FCNCs. The impact of five factors (starting Mn (VII) concentration, contact time, pH, adsorbent dosage, and temperature) and their interactions on the removal efficiency is examined using the Response Surface Methodology (RSM). FCNC adsorption efficiency in batch mode is highly influenced by a number of variables, including pH. The innovative FCNCs hybrid composite not only demonstrated the efficient removal of Mn (VII) ions from an aqueous solution, but it also made the process easier. For the elimination of Mn (VII) ions, a mild acid (pH = 2) is preferred. The pseudo-second order, intraparticle-diffusion, and Langmuir isotherm kinetic models as well as the adsorption process have been proven to be compatible. Electrostatic interaction, complexation interaction, ion exchange, and pore filling are methods that can be used to determine the adsorption mechanism on the FCNCs. At least six adsorption-desorption recycles were easily performed by the hybrid FCNCs. The hybrid composite is extremely promising as an improved adsorbent for significant potential in wastewater treatment for heavy metal removal on an industrial scale due to its special features.

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