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Figures 13 and 14 represent the plots of the experimental data and the fitted Langmuir and Freundlich isotherm equations, respectively. Table 3 shows the calculated values of the Langmuir and Freundlich isotherm coefficients.
Table 3

Adsorption isothermal coefficients calculated from Langmuir and Freundlich isotherms

IsothermsPb(II)
Langmuir 
R2 0.9811 
qm (mg/g) 44.0528 
Kl (L/mg) 0.3497 
RL 0.9079 
Freundlich 
R2 0.9882 
Kf ((mg/g) (mg/L)−1/n24.6717 
N 0.6809 
IsothermsPb(II)
Langmuir 
R2 0.9811 
qm (mg/g) 44.0528 
Kl (L/mg) 0.3497 
RL 0.9079 
Freundlich 
R2 0.9882 
Kf ((mg/g) (mg/L)−1/n24.6717 
N 0.6809 
Figure 13

Langmuir isotherm for the adsorption of Pb(II) on the CA/Fe3O4 (2.5% wt/v) NFs.

Figure 13

Langmuir isotherm for the adsorption of Pb(II) on the CA/Fe3O4 (2.5% wt/v) NFs.

Figure 14

Freundlich isotherm for the adsorption of Pb(II) on the CA/Fe3O4 (2.5% wt/v) NFs.

Figure 14

Freundlich isotherm for the adsorption of Pb(II) on the CA/Fe3O4 (2.5% wt/v) NFs.

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