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Table 1 Isotherms and their linearized expressions

From: Comparative study of the adsorption of acetaminophen on activated carbons in simulated gastric fluid

Isotherms

Expressions

Linear expressions

Plots

Langmuir

q e = q m K L C e 1 + K L C e

TI C e q e = 1 K LI q m + C e q m

C e q e vsC e

ΔG = − RTln [KL]

TII 1 q e = 1 K LII q m 1 C e + 1 q m

1 q e vs 1 C e

Freundlich

q e = K F C e 1 / n

lnqe = lnKF + n− 1lnCe

lnqevslnCe

Dubinin-Radushkevih (DR)

q e = q max exp 2

lnqe = lnqmax − Dϵ2

lnqevsϵ2

ϵ = RTln 1 + 1 C e

E0 = [2D]− 0.5

Temkin

q e = RT b ln K TK C e

qe = BlnKTK + BlnCe

qevslnCe

 

b = RT B