Dye Adsorption on Expanding Three-Layer Clays - Green Chemistry for Dyes Removal from Wastewater - page 350

Table 9.7 Efect of temperature on the adsorption of cationic dyes.

Adsorbents Dyes name Adsor

dosage

Te m p
Range °K

ΔH
kJ/mol

ΔS
kJ/mol

ΔG
kJ/mol

Reference

Co-bentonite Crystal Violet 1 g/L 295

309

41.94 0.14 -0.99

-3.02

[27]

Acid Activated Bentonite Crystal Violet 2 g/L 290

338

45.5 0.193 -10.5

-19.8

[28]

Natural bentonite Basic Yellow 28

Basic Red 46

1 g/L 293

333
293
333

8.30
8.80

0.042
0.057

-4.16
-5.79
-7.70
-9.92

[30]

BTEA-Bentonite Crystal Violet 1 g/L 303

333

54.28 0.19 -4.11

-9.92

[108]