In the case of the Freundlich isotherm, Kf represents the
adsorption coefficient, and n is related to the effect of the
concentration of metal ions. The nature of metal adsorption
could be defined by both Kf and n values. To some
extent, the n values contribute more significantly. Plots of
log qe and log Ce (Fig. 5) for the adsorption of both the
metal ions were found to be linear throughout the concentration
range studied. The magnitudes of Kf and n
values showed separation of metal ions from the aqueous
medium. The Kf value for adsorption of Pb ion was about
four times higher than that observed for Cd ions. These
results indicated higher adsorption coefficients for Pb than
those for Cd ions. It has been suggested that n values
between 1 and 10 represent beneficial adsorption. As
evident from Table 4, the values of n for both Pb and
Cd were 1.01 and 1.07, respectively, indicating the favorable
adsorption of both the metal ions by N. muscorum.
In the case of the Freundlich isotherm, Kf represents theadsorption coefficient, and n is related to the effect of theconcentration of metal ions. The nature of metal adsorptioncould be defined by both Kf and n values. To someextent, the n values contribute more significantly. Plots oflog qe and log Ce (Fig. 5) for the adsorption of both themetal ions were found to be linear throughout the concentrationrange studied. The magnitudes of Kf and nvalues showed separation of metal ions from the aqueousmedium. The Kf value for adsorption of Pb ion was aboutfour times higher than that observed for Cd ions. Theseresults indicated higher adsorption coefficients for Pb thanthose for Cd ions. It has been suggested that n valuesbetween 1 and 10 represent beneficial adsorption. Asevident from Table 4, the values of n for both Pb andCd were 1.01 and 1.07, respectively, indicating the favorableadsorption of both the metal ions by N. muscorum.
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