Table 2 Isotherm parameters for phenol adsorption by lead ferrite-MAC and pristine AC.

From: Lead ferrite-activated carbon magnetic composite for efficient removal of phenol from aqueous solutions: synthesis, characterization, and adsorption studies

Model

Parameter

Lead ferrite-MAC

Pristine AC

Langmuir

qm (mg/g)

145.708

116.606

KL (L/mg)

0.013

0.006

R2

0.9986

0.9984

R2adj

0.9982

0.9979

ARE (%)

1.872

1.429

MSE (mg/g)2

0.941

0.529

Freundlich

KF ((mg/g)(mg/L)−1/nF)

12.713

4.688

1/n (dimensionless)

0.392

0.486

R2

0.97863

0.9811

R2adj

0.97151

0.9782

ARE (%)

7.228

5.269

MSE (mg/g)2

14.778

6.995

Redlich-Peterson

KRP (L/g)

2.155

0.882

aRP (L/mg)nRP

0.024

0.019

nRP (dimensionless)

0.920

0.852

R2

0.9997

0.9998

R2adj

0.9995

0.9995

ARE (%)

0.724

0.423

MSE (mg/g)2

0.178

0.078

Tempkin

KT (L/mg)

76.173

92.349

bT (J/mol)

0.120

0.055

R2

0.9990

0.9969

R2adj

0.9987

0.9959

ARE (%)

1.086

1.893

MSE (mg/g)2

0.672

1.019

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