Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2003 by Universidad Católica de Valparaíso -- Chile
Vol. 6 No. 3, Issue of December 15, 2003
 


Table 4. Comparison between adsorption rate constants, qe estimated and coefficients of correlation associated to the Lagergren pseudo first-order and to the pseudo second-order kinetic models (C0 = 18.4 mg/mL, w = 0.100g, V = 25mL, pH 5.0, agitation rate 150 rpm).

T (K)

First-order kinetic model

Second-order kinetic model  

qe,exp(mg/g)

k1,ads(min-1)

qe (mg/g)

R

k2,ads(g/mg.min)

qe (mg/g)

R

298

0.150 (0.011)a

1.21 (0.35)

0.967

0.349 (0.043)

4.30 (0.03)

1.000

4.26

313

0.180 (0.012)

1.51 (0.46)

0.950

0.307 (0.035)

4.30 (0.03)

1.000

4.26

328

0.232 (0.020)

1.25 (0.29)

0.989

0.791 (0.118)

4.09 (0.03)

1.000

4.10

a: Figures in parenthesis are standard deviations (n = 10 first-order kinetic model; n = 20 second-order kinetic model).

 

 


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