Table 1 Cabbage waste-derived activated carbon's Cr (VI) removal efficiency compared to other adsorbents

1

Cactus

3

2.5

60

99.5

[38]

2

Eichhornia crassipes

5

10

90

98.4

[11]

3

Orange peel

2

2.5

90

94.74

[9]

4

Tella residue

2

2.5

240

98.43

[22]

5

Pea seed Shell

3

2.5

60

99.88

[22]

6

Potato peel

2

6

280

99.52

[40]

7

Manjistha

2

2.5

180

95

[44]

8

Rice Husk

2

6

280

99.88

[40]

9

Banana peduncle

4

1.25

90

73.78

[31]

10

Chat stems (Catha edulis)

4

30

180

97.03

[6]

11

Sugarcane bagasse

2

7.5

20

98

[35]

12

Groundnut shell

8

2

120

87.6

[7]

13

Teff husk

1.9

20.2

124

95.56

[2]

14

Hyacinth roots

3

14

120

84.23

[24]

15

Maize straw

2

4

2880

99.9

[41]

16

Cabbage waste

3

2

150

99.87 (S*)

This study

17

Cabbage waste

3

2

150

83.81 (Rt*)

This study