Sorption Energies for Atrazine onto Devolatalized Vitellaria paradoxa

We utilize isotherm models in contributing to scholarly knowledge in simple terms, to measure the forces or energy defining certain adsorption phenomenon. gas chromatography coupled with mass spectrophotometer detector (gcms) was utilized to measure equilibrium phase atrazine after adsorption onto shea nut shells (ss) acid derived activated carbon. data were fitted into the d-r and temkin isotherm relationships for energy data estimation of sorption energy value (bd), mean free energy (ed) and heat of sorption (b). they were estimated as 0.7600mol2kj-2, 0.8111 kjmol-1 and 0.790jmol-1 respectively. the parameter predicting the type of adsorption was evaluated bd , b < 20kj/mol and ed < 8 which is an indication that physisorption (non specific adsorption) dominates chemisorption and ion exchange. the d-r model with a higher correlation coefficient values, r2 = 0.979 proves a better choice in explaining sorption energies. generally, shea nut shells can be used as alternative precursors for activated carbon production via the two steps and acid treatment method..