Table 3 Kinetic parameters derived from the pseudo-first-order and pseudo-second-order models for the biosorption of MB.

From: A novel composite of chitosan and Bacillus subtilis exopolysaccharide for the removal of methylene blue from aqueous solutions

Adsorbent

Initial conc. (ppm)

qexp

(mg g− 1)

Pseudo first order

Pseudo second order

K1

qe

R2

K2

qe

R2

Chitosan

50

43.23

0.004

6.534

0.97747

0.0023

41.67

0.9973

Chitosan/EPS composite

50

41.53

0.0207

6.911

0.98882

0.176

45.87

0.9981

Back to article page