Chitosan-Coated Glass Beads in a Fluidized Bed for Use in Fixed-Bed Dye Adsorption

The effects of the inlet air temperature and two chitosan solutions, pure or with coating auxiliaries, on the coating efficiency of glass beads in a fluidized bed were analyzed. The coated beads were used in a fixed-bed column for adsorption of reactive black 5 dye in aqueous solution, and the effects of the pH and the coating solution formulation on the adsorption capacity were investigated. The glass bead coating process reached higher efficiencies at an air temperature of 80 degrees C with pure chitosan solution. The highest adsorption capacities were found at pH 3, using the beads coated with pure chitosan solution. All dynamic adsorption models were suitable to represent the breakthrough curves. The high values found for the coating efficiency and adsorption capacity prove these methods to be promising in dye adsorption.

Automated summary

The study analyzed the effects of inlet air temperature and chitosan solutions on coating efficiency, as well as the effects of pH and coating solution formulation on adsorption capacity. Results showed higher efficiencies and adsorption capacities could be achieved under specific conditions.