Removal of hazardous Aniline Blue dye using a potential Biosorbent - Hen feather

In this research we have successfully removed a highly toxic dye, "Aniline Blue", from its aqueous solution employing an adsorbent, Hen Feathers. The dye adsorption over Hen Feather was comprehensively studied over ranges of contact time, pH, concentration, and adsorbent dosage, and the optimum values were evaluated. In order to understand the behaviour of the adsorption system, various isotherm models were evaluated at temperatures of 30, 40 and 50 degrees C. The data obtained from contact time studies were used to test pseudo-first and pseudo-second order kinetic models and it was found that the adsorption follows pseudo-second-order kinetics. Using the Langmuir constant, b, thermodynamic parameters including Delta G degrees, Delta H degrees and Delta S degrees were calculated and it was ascertained that the process is endothermic (positive Delta H degrees), involves an increase in disorder (positive Delta S degrees) and is spontaneous (negative Delta G degrees). The values of the separation factor (r) also confirmed a favourable adsorption process at all three temperatures studied. Overall, it is affirmed that the adsorbent, Hen Feather, acts as highly potent scavenger to remove the dye Aniline Blue from its aqueous solutions.