Table 2 The kinetic models for phosphate adsorption using HIAO/225H.

From: Advanced natural hydrated iron-alum oxides cation exchange resin for simultaneous phosphate and hardness removal

Model

Parameter

Parameters

Pseudo-first-order

Kad (g mg−1 h−1)

0.0756

R2

0.9802

Qe, cal:

 

(mg P g−1 Fe)

66.47

(mg P g−1)

1.9941

Qe, exp:

 

(mg P g−1 Fe)

69.15

(mg P g−1)

2.075

Pseudo-second-order

Kad (g mg−1 h−1)

0.001494

R2

0.9906

Qe, cal:

 

(mg P g−1 Fe)

79.37

(mg P g−1)

2.3811

Intraparticle diffusion

K (g mg−1 h−0.5)

0.2618

C

0.2939

D (cm2 s−1)

7.4405 × 10−10

R2

0.9527

Film diffusion

D (cm2 s−1)

2.9439 × 10−5

R2

0.9724

Pore diffusion

D (cm2 s−1)

8.7516 × 10−6

R2

0.8176

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