Impregnation of Fe2O3 in carbon foam (CF) enhanced the adsorption of Cr.
Fe2O3-CF adsorbed both cationic and anionic heavy metals simultaneously.
There is no interference between adsorptions of Cr and Cu using Fe2O3-CF.
The adsorption of Cu on Fe2O3-CF interfered the adsorption on Ni.
Fe2O3-CF showed excellent removal of Cr and Cu in fixed-bed column test.