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..