Type of adsorbent

An increase in the degree of desorption of U²³⁸ isotope from 100 g of adsorbents with an increase in temperature,

Bq/100 g

The value of the activation energy of desorption of the U²³⁸ isotope

from adsorbents,

E_a (kJ/mol).

298 K

323 K

343

A₂₉₈

D₃₂₃

Ln (D₃₂₃/A₂₉₈)

D₃₄₃

Ln (D₃₄₃/A₂₉₈)

DOWEX

HCR S/S

cationite

92

26

−1.265

46

−0.693

26.3

Activated carbon

65

19

−1.230

32

−0.709

24.6

Expanded

clay

60

18

−1.204

30

−0.693

23.6

Pebble

gravelly

sand

54

16

−1.216

26

−0.731

22.5

Anthracite

44

13

−1.220

21

−0.740

22.1