Effective removal of Cr(VI) and methyl orange by nano magnetite loaded starch/muscovite biocomposite: Characterization, experiments, advanced modeling, and physicochemical parameters interpretation.

Magnetite nanoparticles (MNPs) synthesized from heated basalt were used to support a biocomposite prepared from muscovite (Mus) and carbohydrate polymer starch (St). The developed Mus/St/MNPs composite was characterized by XRD, FTIR, FESEM, TGA, DSC, and Zeta potential techniques. This multifunctional composite showed outstanding adsorption properties for hexavalent chromium (Cr(VI)) and methyl orange (MO) removal at 25-55 °C and pH 3.