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. 2016 Dec 27;9(1):5. doi: 10.3390/polym9010005

Table 5.

Adsorption isotherm constants for Cu2+ adsorbed by different adsorbents.

Model Coefficient S-1 S-2 S-3 S-4
Langmuir qmax 66.16 74.82 88.85 122.76
b 0.023 0.027 0.042 0.040
R2 0.9936 0.9947 0.9874 0.9892
Freundlich Kf 5.99 8.22 14.91 18.88
n 0.44 0.41 0.34 0.36
R2 0.9741 0.9709 0.9359 0.9614