Table 4 Kinetic model parameters for the adsorption of Cr (VI) onto rGO@Fe3O4.

From: Study of linear and nonlinear isotherm and kinetic parameters of hexavalent chromium adsorption onto reduced graphene oxide coated iron oxide

Model

Parameters

Nonlinear

Linear

PSO modeling

k2 (g/mg min)

0.3786

0.2441

qe (mg/g)

1.7944

1.8418

R2

0.9474

0.9992

X2

0.060

0.275

ARE

0.127

0.177

RMSE

0.102

0.404

HYBRID

0.090

0.413

PFO modeling

k1 (min−1)

0.1259

0.0318

qe (mg/g)

8.79

0.3982

R2

0.9908

0.9398

X2

0.0108

123.5

ARE

0.083

0.933

RMSE

0.017

201.5

HYBRID

0.016

185.2

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