Table 3 Thermodynamic parameters for Pb2+ and Cr6+ adsorption onto L-Cyst-Fe3O4 NPs.

From: Lead and Chromium Adsorption from Water using L-Cysteine Functionalized Magnetite (Fe3O4) Nanoparticles

Adsorbate

ΔH° (kJ/mol)

ΔS° [kJ/(mol K)]

T (K)

K (L g−1)

ΔG° (kJ/mol)

Pb2+

83.7

0.31

298.15

3.448

−8.55

308.15

4.360

−11.17

318.15

5.571

−14.7

Cr6+

73.31

0.28

298.15

3.873

−9.60

308.15

4.675

−11.98

318.15

5.733

−15.16

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