Adsorbent

Adsorption capacity, mg/g

Initial Cr(VI) concentration range, mg/l

pH

Reference

M. oleifera leaves biomass

33.9

10 - 150

2

This study

Euclear schimperi leaves

3.95

5 - 20

2

[10]

Acacia albida barks

2.98

2 - 20

2

[10]

Neem leaves

10.4

20 - 200

1-3

[15]

Orange peel

19.80

10 - 150

2

[16]

Neem sawdust

58.82

10 - 150

2

[16]

Mango sawdust

37.73

10 - 150

2

[16]

Asperigillus niger

6.97

25 - 100

6

[17]

Cactus leaves

7.08

-

2

[18]

Cooked tea dust

30.39

25 - 125

2

[19]

Camellia sinensis green tea leaves

34.59

5 - 500

2

[8]