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. 2022 Mar 23;7(13):10944–10954. doi: 10.1021/acsomega.1c06647

Table 2. Adsorption Isotherm Parameters of Two Isotherm Models for Different Adsorbates.

  Langmuir model
 Freundlich model
adsorbate Qm (mg/g) b (L/mg) R2 k (mg/g) n R2
Pb(II) 680.3 0.0284 0.9927 29.91 2.3737 0.9123
Cd(II) 418.4 0.0032 0.9909 2.74 1.5183 0.9648
Cu(II) 280.1 0.0028 0.9907 19.11 4.3397 0.8174