Magnetic chitosan composite for adsorption of cationic and anionic dyes in aqueous solution

Magnetic chitosan composite for adsorption of cationic and anionic dyes in aqueous solution

A magnetic composite material composed of nano-magnetite (NMT), heulandite (HE), and cross-linkedchitosan was prepared and used as an adsorbent for methylene blue (MB) and methyl orange (MO). Thecomposite was characterized for the morphology, magnetic and surface properties. The optimal massratio of chitosan:HE:NMT for the best removal of both dyes was determined to be 1:1:0.33. Theadsorption of MB and MO followed the pseudo-second order kinetics, and the maximum adsorptioncapacities were 45.1 and 149.2 mg g 1 at pH 5.5, respectively. The adsorption of MB increased with thepH increase, while MO adsorption showed an opposite trend.

A magnetic composite material composed of nano-magnetite (NMT), heulandite (HE), and cross-linkedchitosan was prepared and used as an adsorbent for methylene blue (MB) and methyl orange (MO). Thecomposite was characterized for the morphology, magnetic and surface properties. The optimal massratio of chitosan:HE:NMT for the best removal of both dyes was determined to be 1:1:0.33. Theadsorption of MB and MO followed the pseudo-second order kinetics, and the maximum adsorptioncapacities were 45.1 and 149.2 mg g 1 at pH 5.5, respectively. The adsorption of MB increased with thepH increase, while MO adsorption showed an opposite trend.