Abstract
Numerous dye removal techniques have been reported by researchers; however, adsorption and degradation have been identified as the best options due to their low operating costs and greater efficiency. The use of zeolite imidazole based metal organic frameworks (ZIF-MOFs) for dye adsorption and degradation is an effective and preferred approach owing to their desired features such as variable pore diameters and large surface area. Furthermore, there is an increasing interest in using these porous materials to remove toxins from aquatic settings. In this work, two CSM-SA@Ni-MOF composite beads were prepared, evaluated, and used to remove both bromophenol blue (BB, anionic) and malachite green (MG, cationic) dyes from aqueous solutions. Adsorption studies revealed that these materials have good anionic and cationic dye capture ability which is primarily due to the electrostatic interaction between the materials' surface positive or negative charges, as well as the affinity of the interlinked natural adsorbents (chitosan and sodium alginate) for the dyes, and excellent reusability.
