Adsorption kinetics for the removal of chromium(VI) from aqueous solution by adsorbents derived from used tyres and sawdust

Hamadi, NK, Chen, XD, Farid, MM and Lu, MGQ (2001) Adsorption kinetics for the removal of chromium(VI) from aqueous solution by adsorbents derived from used tyres and sawdust. Chemical Engineering Journal, 84 2: 95-105.


Author Hamadi, NK
Chen, XD
Farid, MM
Lu, MGQ
Title Adsorption kinetics for the removal of chromium(VI) from aqueous solution by adsorbents derived from used tyres and sawdust
Journal name Chemical Engineering Journal   Check publisher's open access policy
Publication date 2001
Sub-type Article
DOI 10.1016/S1385-8947(01)00194-2
Volume number 84
Issue number 2
ISSN 1385-8947
Start page 95
End page 105
Total pages 11
Editor L R Weatherley
R C Darton
Place of publication Amsterdam
Publisher Elsevier
Collection year 2001
Language eng
Subject C1
291804 Nanotechnology
670707 Inorganic industrial chemicals
Abstract The batch removal of hexavalent chromium (Cr(Vl)) from wastewater under different experimental conditions using economic adsorbents was investigated in this study. These adsorbents were produced from the pyrolysis and activation of the waste tyres (TAC) and from the pyrolysis of sawdust (SPC). The performance of these adsorbents against commercial activated carbon F400 (CAC) has also been carried out. The removal was favoured at low pH, with maximum removal at pH = 2 for all types of carbon. The effects of concentration, temperature and particle size have been reported. All sorbents were found to efficiently remove Cr(VI) from solution. The batch sorption kinetics have been tested for a first-order reversible reaction, a first-order and second-order reaction. The rate constants of adsorption for all these kinetic models have been calculated. The applicability of the Langmuir isotherm for the present system has been tested at different temperatures. The thermodynamic parameters (AGO, K,) obtained indicate the endothermic nature of Cr(Vl) adsorption on TAC, SPC and CAC. (C) 2001 Elsevier Science B.V. All rights reserved.
Keyword Engineering, Chemical
Used Tyres
Sawdust
Pyrolysis
Activation
Adsorption Kinetics
Langmuir Isotherm
Hexavalent Chromium
Thermodynamic Parameters
Activated Carbon
Sorption
Product
Tires
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Tue, 14 Aug 2007, 16:08:14 EST