Kinetics and thermodymics studies for the removal of bromocresol purple using raw bentonite clay and activated carbon from <i>Vachellia nilotica</i> pod as adsorbents

Abstract

The adsorption of Bromocresol purple (BCP) onto Raw Bentonite Clay (RBC) and activated carbon from Vachellia nilotica adsorbents were characterized using Fourier transform spectrometer (FTIR) and Scanning Electron Microscope (SEM). The study of adsorption Kinetics and Thermodynamics were carried out. The pseudo -second order kinetic exhibits the best fit with the experimental data with R 2 values close to 1 and experimental values q are more closer to the calculated q change, ΔG of -5.98 to -7.75 and the process to be spontaneous. Positive values of enthalpy, ΔH, confirm the endothermic character of the adsorption process.Lower ΔH values of 11.01 and 11.98kJ/ adsorption of dye onto raw bentonite clay and activated carbon respectively, the adsorption is physical in nature..

Biosorption of Bromo-based Dyes from Wastewater Using Low-Cost Adsorbents: A Review

“…Abdulganiyu & Ibrahim, [88] investigated the adsorption of BCP onto raw bentonite clay and activated carbon from Vachellia nilotica using batch adsorption process. The pseudo-secondorder kinetic exhibits the best fit with a correlated coefficient (R 2 ) close to 1.…”