Adsorption capacity of Cd(II) by various adsorbents

Adsorption capacity of Cr(VI) by various adsorbents

Adsorbent

Q₀ (mg∙g⁻¹)

Ref.

Adsorbent

Q₀ (mg∙g⁻¹)

Ref.

Low-grade phosphate

7.5

[43]

Bentonite

0.57

[50]

Fe-montmorillonite

2.89

[44]

Oak sawdust (Quercus coccifera) treated by HCl

1.72

[51]

Kaolinite

9.9

[45]

Activated carbon (Merck))

0.09

[52]

Na-bentonite

26.2

[46]

Activated carbon (BDH)

0.93

[53]

Red mud

10.6

[47]

Iron (III) hydroxide

0.47

[54]

Bagasse fly ash

2.0

[48]

micellar compounds

17.89

[55]

Ca-bentonite

7.3

[49]

Sawdust

2.29

[56]

Natural Algerian bentonite

13.17

Present study

Natural Algerian bentonite

12.61

Present study