Table 1 Moisture content, ash content, and elemental analysis on a dry basis (with ± SD value from three repetitions).

From: Comparative study of Waste-Derived and conventional sorbents for heavy metal removal from water

Sample

Moisture [%]

Ash [%]

C

[%]

H

[%]

N [%]

S

[%]

O

[%]

pHpzc

Coffee

5.51 ± 0.10

0.59 ± 0.02

50.48 ± 0.16

15.47 ± 0.06

2.76 ± 0,12

 < 0.30

30.35 ± 0.10

6.13 ± 0.05

Chitosan

6.83 ± 0.10

0.18 ± 0.03

44.37 ± 0.03

13.43 ± 0.10

8.08 ± 0.05

 < 0.30

33.59 ± 0.01

8.22 ± 0.13

Bentonite

8.43 ± 0.03

33.15 ± 0.46

1.26 ± 0.03

2.43 ± 0.14

0.90 ± 0.18

3.92 ± 0.18

58.34 ± 0.06

3.74 ± 0.17

Compost

7,68 ± 0,02

19,70 ± 1,02

27,57 ± 0,18

4,77 ± 0,05

1.88 ± 0.02

 < 0.30

45.76 ± 0.15

6.14 ± 0.09

Hazelnut shells

7.38 ± 0.08

1.46 ± 0.03

46.66 ± 0.13

11.14 ± 0.04

0.86 ± 0.01

 < 0.30

39.55 ± 0.17

7.45 ± 0.14

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