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Table 3 Kinetic parameters for the adsorption of Cu(II), Hg(II), Pb(II) and Cd(II) by DiGu-MC

From: Novel diaminoguanidine functionalized cellulose: synthesis, characterization, adsorption characteristics and application for ICP-AES determination of copper(II), mercury(II), lead(II) and cadmium(II) from aqueous solutions

Adsorbate Cu2+ Hg2+ Pb2+ Cd2+
Pseudo 1st order     
 qe(ads) (mg/g) 76.92 400 84.034 97.087
 K1 (min−1) 130.938 4581.6 111.176 971.75
 R2 0.9633 0.9886 0.9689 0.9549
Pseudo 2nd order
 Adsorbates Cu2+ Hg2+ Pb2+ Cd2+
 qe(ads) (mg/g) 72.46 95.2 74.63 63.29
 k2 (g/mg.min) 1.41 × 10–4 1.25 × 10–5 2.297 × 10–4 3.284 × 10–5
 R2 0.9892 0.8517 0.994 0.7893