Removal of Direct Red 81 Dye from Aqueous Solution by Native and Citric Acid Modified Bamboo Sawdust - Kinetic Study and Equilibrium Isotherm Analyses

İmran ALİ; Sarita DAHIYA; Tabrez KHAN

Makale detayları

Removal of Direct Red 81 Dye from Aqueous Solution by Native and Citric Acid Modified Bamboo Sawdust - Kinetic Study and Equilibrium Isotherm Analyses

Yazarlar:

İmran ALİ | Sarita DAHIYA | Tabrez KHAN

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Gazi University Journal of Science 2012 Vol.25 Issue 1, pp.59-87

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

İngilizce

Document ID (Org No.):

2000429459

eISSN:

2147-1762

Özet:

 


Adsorption of Direct Red 81 (DR81) dye was investigated using Bamboo Sawdust (BSD) and Treated Bamboo Sawdust (TBSD) in a batch system with respect to initial dye concentration, adsorbent dose, pH, temperature and contact time. Maximum adsorption capacity (qm) obtained from the Langmuir isotherm plots were 6.43 mg/g (89%) (DR81-BSD) and 13.83 mg/g (92%) (DR81-TBSD) at 303 K. Freundlich and Halsey models described the data more appropriately as compared to Langmuir, Dubinin-Kaganer-Radushkevich (DKR), Harkin-Jura and Temkin models. The adsorption dynamics conformed well to pseudo-second order kinetic equation. The adsorption process was controlled by both liquid-film and intra-particle diffusions. Thermodynamic parameters (ΔGo, ΔHo and ΔSo) suggested the adsorption process to be spontaneous, endothermic with increase in randomness at solid-solution interface.

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Makale detayları

Removal of Direct Red 81 Dye from Aqueous Solution by Native and Citric Acid Modified Bamboo Sawdust - Kinetic Study and Equilibrium Isotherm Analyses

Yazarlar: İmran ALİ | Sarita DAHIYA | Tabrez KHAN

Yayıncı: Gazi University

Ana Başlıklar: Uygulamalı fizik

Dergi: Gazi University Journal of Science 2012 Vol.25 Issue 1, pp.59-87

Belge Tipi: Makale

Yayın Tarihi: 1/2012

Belge Dili: İngilizce

Document ID (Org No.): 2000429459

eISSN: 2147-1762

Sayı

Yazarlar:

İmran ALİ | Sarita DAHIYA | Tabrez KHAN

Yayıncı:

Gazi University

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Gazi University Journal of Science 2012 Vol.25 Issue 1, pp.59-87

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

İngilizce

Document ID (Org No.):

2000429459

eISSN:

2147-1762