Table 3 Thermodynamic parameters for the adsorption of Cd(II) onto the four rice straw adsorbents.

From: Characterization and Interpretation of Cd (II) Adsorption by Different Modified Rice Straws under Contrasting Conditions

Treatments

Temperature (K)

ΔG° (kJ g−1 mol−1)

ΔH° (J g−1 mol−1)

ΔS° (J g−1 mol−1 K−1)

RL

Sp

298

13.66

−27.76

−0.14

0.1988~1

308

13.74

  

0.1764~1

318

16.44

  

0.3344~1

Sa

298

6.16

−15.89

−0.07

0.0119~1

308

8.21

  

0.0241~1

318

7.64

  

0.0176~1

Sb

298

−0.43

−206.35

−0.69

0.0008~1

308

7.73

  

0.0200~1

318

13.39

  

0.1366~1

Ms

298

10.54

−45.63

−0.19

0.0658~1

308

8.78

  

0.0300~1

318

14.31

  

0.1832~1

  1. Sp, rice straw powder; Sa, rice straw ash; Sb, rice straw biochar; Ms, modified rice straw.
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