Table 5 Non-linear adsorption isotherm models and parameters for adsorption of cr (VI) and Cur.
Isotherm model | Langmuir | Freundlich | D-R | Temkin | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Plot | Qe vs. Ce | Qe vs. Ce | Qe vs. Ce | Qe vs. Ce | ||||||||||
Constant | qmax | b | R2 | RL | n | Kf | R2 | QDR | Kad | R2 | E | bT | R2 | aT |
Unit | mg g− 1 | L mg− 1 | - | - | - | L mg− 1 | - | mg g− 1 | mol2 J− 2 | - | J mol− 1 | J mol− 1 | - | L mg− 1 |
Cr(VI) | 33.84 | −6.51E16 | 3.33E-16 | (−1.54E-18) -(−6.14E-20) | 4.17 | 20.98 | 0.922 | 51.43 | 2.19 | 0.863 | 477.82 | 285.77 | 0.964 | 11 |
Cur | 13.65 | −1.78 | −1.32 | (−0.06)- (−0.002) | 2.18 | 10.81 | 0.976 | 68.28 | 126.40 | 0.660 | 6.29E + 01 | 199.42 | 0.860 | 2.51 |
