Adsorbents

Adsorption capacity

(mg/g)

pH

References

N,O-CMCS/PEO nanofibers

79.7

8

-

Hydrochar, activated carbons

44.1

7

[57]

Biochar, rice branpyrolysis

67.6

7

[58]

Biochar, Eucalyptus pyrolysis

6.4

7

[59]

Granular activated carbon and two synthetic zeolites (GAC)

Synthetic zeolites (zeolite 13×)

Synthetic zeolites (zeolite 4A)

234

32.1

21.9

9

7

9

[60]

β-Cyclodextrin carboxymethyl cellulose (β-CD-CMC) polymer

5.1

7

[61]

Lignin/PVA nanofibers

78.2

7

[44]

Paper mill sludge-based activated carbon with ZnCl₂

28.4

7

[62]