Table 3: Maximum sorption capacities (mg.g-1) for CSH (this study) and other adsorbents.

Material

Cu capacity (mg.g-1)

Pb capacity (mg.g-1)

Zn capacity (mg.g-1)

Ref.

Zeolite (Clinoptilolite)

25.7

290.1

17.5

[23]

Zeolite (Egyptian Kaoline )

43.8

213.4

41.2

[31]

Zeolite (Chabasite)

5.1

6.0

5.5

[32]

Zeolite X

109

549

 

[32]

Zeolite 13X

136

 

 

[32]

Activated carbon

7.7

19.3

3.5

[24]

Clays

54.1

239

250

[33]

CSH/Chitosan

425

796

400

[24]

CSH

680

 

252

[26]

CSH

209 ± 21

213 ± 22

53 ± 6

This study