Table 5 Isotherm model parameters for reactive blue dye adsorption onto Curcumin/MIL-88 A.

From: Green synthesis and characterization of Curcumin functionalized MIL-88 A metal organic framework for reactive blue dye removal optimized by response surface methodology

Model

Parameter 1

Parameter 2

R²

RMSE

Chi-square (χ²)

AIC

Langmuir

qmax = 80.89 mg/g

KL = 0.0209 L/mg

0.9421

0.232

0.176

12.45

Freundlich

KF = 3.09

1/n = 0.5274

0.9964

0.089

0.045

9.34

Temkin

AT = 0.512

BT = 1.84

0.9713

0.156

0.092

10.12

Dubinin–Radushkevich

qs = 4.85 mg/g

E = 5.23 kJ/mol

0.8872

0.301

0.278

14.65

  1. The accuracy of the model fits was evaluated using the correlation coefficient (R²) and root mean square error (RMSE), calculated using the following Eqs. (5 and 6)72:.
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