Equilibrium and kinetic modeling on the removalof malachite green from aqueous solution using odina wodier bark carbon

Batch adsorption behavior of malachite green(mg) from aqueous solution by using odina wodier bark carbon (owc) was investigated as a function of parameters such as initial mg concentration, adsorbent dose, ph, contact time and temperature. the freundlich and langmuir adsorption models were applied to describe the equilibrium. the thermodynamic parameters such as δg° , δh° and δs° were calculated to know the nature of adsorption, these values indicate that the adsorption process is favourable. the pseudo-first-order, pseudo- second-order, elovich and intraparticle diffusion models were used to describe the kinetic parameters. the high correlation coefficient (γ) was found in pseudo-second-order and intraparticle diffusion models.