We investigated the kinetics and thermodynamics of adsorption of hexavalent chromium
with different types of starch functionalized mixed phase iron oxide nanoparticles (previously reported
in literature) as adsorbents. The data for kinetics of batch adsorption at the optimum pH was found to
best fit the pseudo second order kinetics model. The activation energy of adsorption confirmed that the
removal of Cr (VI) was by chemisorption on the SIONPs surfaces. On the other hand, experiments on
the thermodynamics of adsorption showed that adsorption capacity for Cr (VI) increases with
Keywords: Adsorption activation energy, chromium, iron oxide nanoparticles, kinetics, starch, thermodynamics.
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