Table 4 Adsorption capacities of Cu²⁺, Pb²⁺and Ni²⁺ on different adsorbents.

Activated Bentonite (AB)

13 ± 0.04

12.2 ± 0.05

14 ± 0.03

This Study

Natural Bentonite (NB)

9 ± 0.03

8 ± 0.02

9.2 ± 0.04

This Study

Zeolite

–

–

5.1

⁴⁰

Luffa Actangula Carbon

–

–

12.47

⁴¹

Activated rubber wood sawdust

–

–

5.73

⁴²

Chai teabags

–

–

16.28

⁴³

Peat

–

–

7.39

⁴⁴

Na bentonite

–

13

–

²⁶

Kaolinite

–

1.67

–

⁴⁵

Activated carbon

–

14.65

–

⁴⁶

red mud

–

13.69

–

⁴⁷

Activated carbon

–

5.4

–

⁴⁸

Carbon aerogel

–

2.8

–

⁴⁹

Beysehir lignite

–

12

–

⁴⁸

Acid modified montmorillonite

–

7.31

–

⁵⁰

Na-montmorillonite

–

10.04

–

⁵⁰

Mg-oxide Immobilized Sand

2.843

–

–

⁵¹

Sawdust

3.19

–

–

⁵²

Turkish low rank coal

13.58

–

–

⁵³

Natural kaolinite

7.75

–

–

⁵⁴

Acid-modified monmorillinite

1.62

–

–

⁵⁵

Natural kaolin clay

2.35

–

–

⁵⁶