Table 1 Quasi-first-order and quasi-second-order kinetic model, isothermal and thermodynamics fitting parameters of IMC for Cr(VI) adsorption.

From: Hexavalent chromium elimination from wastewater by integrated micro-electrolysis composites synthesized from red mud and rice straw via a facile one-pot method

Adsorbent

Pseudo-first-order

Pseudo-second-order

qe (mg/g)

k1 (min−1)

R2

qe (mg/g)

k2 (g/(mg min))

R2

RMBC800-1

63.14

0.003

0.999

78.98

0.336

0.991

 

Langmuir model

Freundlich model

qm (mg/g)

KL (L/mg)

R2

KF (mg/g)

1/n

R2

298 K

248.83

0.002

0.996

9.44

0.437

0.971

308 K

242.32

0.003

0.994

9.94

0.433

0.986

318 K

243.57

0.003

0.995

10.24

0.429

0.984

 

∆G° (kJ/mol)

∆H° (J/mol)

∆S°(J/(mol/k))

298 K

− 5.67

6.52

10.24

308 K

− 5.71

318 K

− 6.12

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