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Table 4 Comparison of isothermal constants for adsorption of fluoride onto LIB and bauxite

From: Removal of fluoride from water using a novel sorbent lanthanum-impregnated bauxite

 

Isotherm model

Langmuir

Freundlich

LIB

Isotherm parameters

qmax = 18.18 mg/g

b = 0.541

R2 = 0.997

Kf = 5.794 mg/g

n = 2.753

R2 = 0.805

Bauxite

Isotherm parameters

qmax = 7.722 mg/g

b = 0.379

R2 = 0.992

Kf = 1.902 mg/g

n = 2.085

R2 = 0.861