Kinetics, thermodynamics and equilibrium of the removal of chromium(VI) ions from aqueous solutions by using chemically activated leaves of Ficus nitida were investigated. Adsorption runs were performed as a function of pH, mass of biosorbent, contact time, initial concentration of chromium(VI) ions and temperature. | Kinetic isotherm and thermodynamic studies on biosorption of chromium VI by using activated carbon from leaves of Ficus nitida