Table 3 Comparison of the maximum uptake capacity for different adsorbents.

From: Polyethyleneimine impregnated alginate capsule as a high capacity sorbent for the recovery of monovalent and trivalent gold

Adsorbent and species

qm (mg/g)

References

L-cysteine impregnated alginate capsules

1.51

18

Cross-linked chestnut pellicle

2100

44

Ca-alginate beads

1.47

45

Wattle tannin gel

8000

46

Thiourea modified alginate powder

6.40

47

Chemically modified chitosan

669.8

48

Porous epichlorohydrin / thiourea modified alginate(PETA)

1.97

49

Dimethylamine modified persimmon waste gel

1109.11

50

Sulphuric acid cross-linked alginate powder

5.64

26

Crosslinked persimmon tannin gel

1516.9

51

Raw biomass/DCB toward Au(I)

50.19/86.16

13

Bisthiourea modified persimmon tannin gel

1020.46

52

Rice husk carbon

149.72

53

PEIIACs toward Au(III)

3077.52

This work

PEIIACs toward Au(I)

928.80

This work