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Table 2

Isotherm parameters for the adsorption of Cu(II) and Pb(II) ions onto CMC-Bz

Isotherm modelParameters and constantsMetal ion conc.
100 mg/L
Cu(II)Pb(II)
Langmuir qm (mg/g) 483.2 455.3 
kL (L/mg) 0.0168 0.0215 
R2 0.9831 0.9985 
RL 0.060 0.021 
Freundlich Kf (mg/g) 28 36.25 
n (g/L) 1.956 2.17 
R2 0.9931 0.9817 
Temkin A (L/mg) 0.1832 0.2127 
B (mg−1) 44.65 43.58 
R2 0.9899 0.9975 
Redlich-Peterson KRP (L/g) 20.79 11.35 
αRP (L/mg) 0.0356 0.0429 
βRP 0.8135 0.8979 
R2 0.9947 0.9996 
Isotherm modelParameters and constantsMetal ion conc.
100 mg/L
Cu(II)Pb(II)
Langmuir qm (mg/g) 483.2 455.3 
kL (L/mg) 0.0168 0.0215 
R2 0.9831 0.9985 
RL 0.060 0.021 
Freundlich Kf (mg/g) 28 36.25 
n (g/L) 1.956 2.17 
R2 0.9931 0.9817 
Temkin A (L/mg) 0.1832 0.2127 
B (mg−1) 44.65 43.58 
R2 0.9899 0.9975 
Redlich-Peterson KRP (L/g) 20.79 11.35 
αRP (L/mg) 0.0356 0.0429 
βRP 0.8135 0.8979 
R2 0.9947 0.9996 
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