Kinetics and Equilibrium Isotherm for adsorption of Basic Blue 9 Dye onto Activated Charcoal prepared from Bhagar Seed Husk

The aim of this investigation was to determine the adsorption behaviour and kinetics of Basic blue 9 dyes in aqueous solution on activated carbons prepared from husk of Bhagar seeds by ZnCl2 activation method in self-generated atmosphere using an oven. FTIR spectra indicated high surface functional groups present on the surface of activated charcoal. The specific surface coverage on activated charcoal was found to be 344.77 m2 per gram of activated charcoal. The adsorption equilibrium and kinetics of Basic blue 9 dyes on prepared activated charcoal were then examined at 298 K. The adsorption isotherms of the Basic blue 9 on activated adsorbent was determined and correlated with common Langmuir, Freundlich and Temkin isotherm models. The Freundlich isotherm showing a better fit for the adsorption data than the Langmuir and Temkin isotherm. The maximum monolayer adsorption capacity obtained from Langmuir isotherm was 666.7 mg of dye Basic blue 9 per gram of activated charcoal. The kinetics of dye adsorption on the activated charcoal has also been studied by fitting the data in the Lagergren’s pseudo-first order and the Ho-McKay’s pseudo second order kinetic models. It was observed that the adsorption of Basic blue 9 dyes over the prepared activated charcoal undergoes the Pseudo-second order processes at all the concentrations of the dye