Table 3 Kinetic model constants for the uptake of sunset yellow and tatrazine dye onto CS

From: Adsorption of tartrazine and sunset yellow anionic dyes onto activated carbon derived from cassava sievate biomass

Kinetic parameter/adsorbent Sunset yellow Tartrazine
qeexp (mg/g) 22.40 30.06
Pseudo-first-order
 qecal (mg/g) 0.893 1.479
 K1 (min−1) 0.018 0.025
 R2 0.581 0.925
Pseudo second-order
 h (mg/g min) 18.078 32.140
 K2 (g/mg min) 0.035 0.035
 qecal (mg/g) 22.727 30.303
 R2 1.000 1.000
Intraparticle diffusion
 Kd (mg/g min1/2) 0.109 0.109
 C 21.08 28.75
 R2 0.748 0.710
Film diffusion
 Kfd 0.019 0.027
 D −3.222 −3.007
 R2 0.580 0.580