Skip to main content

Table 4 Adsorption rate constants and parameters of Cu (II) ion adsorption from the pseudo-first-order and pseudo-second-order kinetic models

From: Adsorptive Removal of Copper (II) Ions from Aqueous Solution Using a Magnetite Nano-Adsorbent from Mill Scale Waste: Synthesis, Characterization, Adsorption and Kinetic Modelling Studies

Kinetic isotherm Parameter Initial concentration (mg/L)
10 20 30 40 50
Pseudo-first-order k1(min−1) 0.1108 0.0233 0.0728 0.0534 0.0290
  qe, calc (mg/g) 0.488 0.560 2.355 2.333 3.090
  qe, exp (mg/g) 0.480 0.582 1.216 2.276 4.408
  R2 0.930 0.991 0.967 0.976 0.872
Pseudo-second-order k2(min.mg/g) 0.0072 0.0514 0.0060 0.0327 0.0214
  qe, calc (mg/g) 0.8667 0.6732 1.8268 2.4297 4.6350
  qe, exp (mg/g) 0.480 0.582 1.216 2.276 4.408
  R2 0.740 0.984 0.680 0.995 0.999