Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2005 by Universidad Católica de Valparaíso -- Chile
Vol. 8 No. 1, Issue of April 15, 2005
 


Table 2. Isotherm model constants and correlation coefficients for adsorption of chromium ions from aqueous solution using various adsorbents.

Type of adsorbent

Langmuir

Freundlich

aL
(mg/g)
----
KL

KL (mol/L)

R2

a

 b

R2

Chitosan coated acid treated oil palm shell charcoal (CCAB)

60.25

2954

0.997

10.67

0.594

0.973

Chitosan coated oil palm shell charcoal (CCB)

52.68

2004

0.996

9.59

0.489

0.956

Acid treated oil palm shell Charcoal (AOPSC)

44.68

1766

0.996

7.36

0.389

0.951


Temperature: 25ºC and pH 5.5.

Supported by UNESCO / MIRCEN network