Table 1 Isotherm parameters for the uptake of sunset yellow and tartrazine onto CS

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

Isotherm models Sunset yellow Tartrazine
Langmuir
 qL (mg/g) 0.09091 20.8333
 KL (L/mg) 0.00019 −3.4285
 R2 0.963 0.844
Freundlich
 KF 8.10961 21.1349
 1/n 0.865 0.309
 N 1.15607 3.2362
 R2 0.999 0.926
Temkin
 A (L/g) 2.74513 81.0228
 B (mg/g) 9.259 4.783
 R2 0.947 0.801
Dubinin–Radushkevick
 qm (mg/g) 18.7276 24.8784
 B (mol2/J2) −2 × 10–07 −3 × 10–8
 R2 0.908 0.868