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. 2021 Mar 29;6(14):9577–9586. doi: 10.1021/acsomega.1c00128

Table 1. Different Types of Kinetic Models for the Adsorption of E3, E2, and E1 at C0 = 1 mg L–1a.

  pseudo-first order
 pseudo-second order
 Elovich
 intraparticle diffusion
analyte k1 (min–1) qe (mg g–1) R2 k2 (g mg–1 min–1) qe (mg g–1) R2 α (mg g–1 min–1) β (g mg–1) R2 k1 (mg g–1 min–1/2) I (mg g–1) R2
E3 0.00784 0.37751 0.87942 0.07200 0.42463 0.99266 0.04964 13.8677 0.95732 0.01751 0.09556 0.85561
E2 0.00832 0.83038 0.91481 0.01443 1.2462 0.98892 0.05561 3.96936 0.94395 0.05528 0.13262 0.90485
E1 0.01225 0.25776 0.91009 0.06298 0.67577 0.99881 0.09078 8.40054 0.92105 0.02824 0.17643 0.77644
a

qe, amounts of E1, E2, and E3 adsorbed at equilibrium. qt, amounts of E1, E2, and E3 adsorbed at a given time t. k1, first-order rate constant. k2, pseudo-second-order rate constant. α, initial hormone sorption. β, desorption constant. kI, intraparticle diffusion rate constant. I, parameter related to the thickness of the boundary layer.