External Mass Transfer Studies during the Adsorptions of Some Dyestuffs and p-Nitrophenol onto Chitosan from Aqueous Solution

İlhan UZUN; Fuat GÜZEL

Article Details

External Mass Transfer Studies during the Adsorptions of Some Dyestuffs and p-Nitrophenol onto Chitosan from Aqueous Solution

Authors:

İlhan UZUN | Fuat GÜZEL

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2004 Vol.28 Issue 6, pp.731-740

Document Type:

Article

Publication Date:

5/2004

Document Language:

Turkish

Document ID (Org No.):

2000729211

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527

Abstract:

 

The effect of temperature on the adsorptions of some  dyestuffs [orange II (O-II), crystal violet (CV) and reactive blue 5  (RB5)] and an ideal adsorbate p-nitrophenol (PNP) by chitosan (Sigma C  3646) from aqueous solution was investigated.  The experimental data  related to adsorption isotherms were applied to linear forms of the  equations that they fitted, and isotherm constants were calculated.   Since the isotherm curves obtained for the adsorptions of O-II and CV  by chitosan fitted the Langmuir adsorption isotherm, the Langmuir  constants (qm and b) related to the adsorption isotherms of these  dyestuffs together with their kinetical data at different temperatures  were applied to the equation of McKay et al., and external mass  transfer coefficients (kf)1 at these temperatures were calculated.   In addition, kinetic data obtained for each dyestuff and PNP at  different temperatures were applied to a further equation developed by  Weber-Mathews, and (kf)2 constants at these temperatures were  calculated.

 

The effect of temperature on the adsorptions of some  dyestuffs [orange II (O-II), crystal violet (CV) and reactive blue 5  (RB5)] and an ideal adsorbate p-nitrophenol (PNP) by chitosan (Sigma C  3646) from aqueous solution was investigated.  The experimental data  related to adsorption isotherms were applied to linear forms of the  equations that they fitted, and isotherm constants were calculated.   Since the isotherm curves obtained for the adsorptions of O-II and CV  by chitosan fitted the Langmuir adsorption isotherm, the Langmuir  constants (qm and b) related to the adsorption isotherms of these  dyestuffs together with their kinetical data at different temperatures  were applied to the equation of McKay et al., and external mass  transfer coefficients (kf)1 at these temperatures were calculated.   In addition, kinetic data obtained for each dyestuff and PNP at  different temperatures were applied to a further equation developed by  Weber-Mathews, and (kf)2 constants at these temperatures were  calculated.

Article Details

External Mass Transfer Studies during the Adsorptions of Some Dyestuffs and p-Nitrophenol onto Chitosan from Aqueous Solution

Authors: İlhan UZUN | Fuat GÜZEL

Publisher: TUBITAK

Journal: Turkish Journal of Chemistry 2004 Vol.28 Issue 6, pp.731-740

Document Type: Article

Publication Date: 5/2004

Document Language: Turkish

Document ID (Org No.): 2000729211

Frequency: Bimonthly

eISSN: 1303-6130

pISSN: 1300-0527

Issues

Authors:

İlhan UZUN | Fuat GÜZEL

Publisher:

TUBITAK

Journal:

Turkish Journal of Chemistry 2004 Vol.28 Issue 6, pp.731-740

Document Type:

Article

Publication Date:

5/2004

Document Language:

Turkish

Document ID (Org No.):

2000729211

Frequency:

Bimonthly

eISSN:

1303-6130

pISSN:

1300-0527