We have studied the removal of Cr (VI) ion from aqueous solution at different condition using n-ZVI. The n-ZVI was
prepared via borohydrate reduction under inert atmosphere. The effect of temperature, concentration and loading
quantities on kinetic and equilibrium of chromium ion removal using n-ZVI were thoroughly examined. The prepared n- ZVI was characterized by several techniques including X-ray diffraction (XRD), transmission electron microscope
(TEM) and scanning electron microscope (SEM). The adsorption capacity was found to be 40 mg g-1 at pH 3.9 and 300
K. The pseudo second order was found to be the best fitting kinetic model. The adsorption activation energy was
calculated and given to be 41.56 kJ mol-1
. The thermodynamic parameters ∆Go
, ∆Ho and ∆So
, were also calculated. The
results indicate the endothermic and spontaneous nature of the adsorption process.