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Table 2 Comparison of parameters of kinetic models for adsorption of fluoride onto LIB and bauxite

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

 

Pseudo-first-order

Pseudo-second-order

Intraparticle diffusion

LIB

qe (exp) = 9.8 (mg/g)

qe (cal) = 5.462 (mg/g)

K1 = 0.0152 (min−1)

R2 = 0.8921

qe (cal) = 10.75 (mg/g)

K2 = .0037 (min−1)

R2 = 0.9965

Kid = 0.438 (g mg−1 min−1)

C = 2.9041

R2 = 0.6986

Bauxite

qe (exp) = 3.1666 (mg/g)

qe (cal) = 0.9156 (mg/g)

K1 = 0.0154 (min−1)

R2 = 0.8956

qe (cal) = 1.781(mg/g)

K2 = 0.0225 (min−1)

R2 = 0.9964

Kid = 0.073 (g mg−1 min−1)

C = 0.4837

R2 = 0.699