The adsorption potential of ZEC was assessed for reactive dyes
and the color removal efficiencies were measured in single and
mixed dye solutions. As shown in Table 2, ZEC exhibited high
adsorption efficiency for RB21. Also, comparing with the results in
single dye solutions, a reduction in removal efficiency of the individual
dye in the mixed dye systems was observed, although the
extent of reduction was different among the dyes.