Magnetized CNTs incorporated MBA cross‐linked guar gum nano‐composite for methylene blue dye removal

Abstract

In the present work, a magnetized multiwalled carbon nanotube dispersed in chemically cross‐linked gaur gum was developed as a nano‐composite adsorbent material for the removal of dye from wastewater. The gaur gum, a bio‐macromolecule was chemically modified by cross‐linking with methylene bis‐acrylamide in the presence of sodium hydroxide as a novel approach to prepare the gel matrix. The magnetite nanoparticles loaded multiwalled carbon nanotubes were dispersed in methylene bis‐acrylamide cross‐linked gaur gum gel during gelation. The nano‐composite was characterized for morphological, spectral, and analytical data. The solid form of the nano‐composite was evaluated as an adsorbent material for the treatment of water containing methylene blue dye molecules as pollutants by the spectrophotometric method. Adsorption isotherm studies suggested that the Freundlich model was the befitting model for adsorption, indicating the multilayered adsorption and the kinetic study revealed the adsorption to occur by a pseudo‐second‐order kinetic process. The novel nano‐composite is found to be a promising material for the adsorptive removal of dye molecules from dye‐contaminated wastewater. The adsorption capacity was observed to be 11 mg/g of the material.