Mechanistic insights into copper removal by pyrolytic tire char through equilibrium studies

Quek, Augustine, Zhao, Xiu-Song and Balasubramanian, Rajashekhar (2010) Mechanistic insights into copper removal by pyrolytic tire char through equilibrium studies. Industrial and Engineering Chemistry Research, 49 10: 4528-4534. doi:10.1021/ie901289e


Author Quek, Augustine
Zhao, Xiu-Song
Balasubramanian, Rajashekhar
Title Mechanistic insights into copper removal by pyrolytic tire char through equilibrium studies
Journal name Industrial and Engineering Chemistry Research   Check publisher's open access policy
ISSN 0888-5885
1520-5045
Publication date 2010-05-19
Sub-type Article (original research)
DOI 10.1021/ie901289e
Volume 49
Issue 10
Start page 4528
End page 4534
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract This study showed that copper(II) can be removed from aqueous solution by activated pyrolytic tire char in three mechanistically distinct ways. On the basis of equilibrium studies, the mechanisms involved in the adsorptive removal of copper(II), namely, precipitation, surface adsorption, and pore diffusion, were elucidated. Precipitation of copper(II) resulted from changes in the solution pH to neutral levels. This was attributed to amphoteric zinc oxide on the char surface, formed during production of the pyrolytic char. Surface adsorption was revealed by X-ray photoelectron spectroscopy data, which showed a significant increase in copper(II) on the char surface after shaking in the copper solution. This surface adsorption took place despite the relatively low surface area and porosity of the char. However, some cracks and fissures were found to exist in the char that can trap small species such as copper ions. These trapped copper species were partially recovered by microwave-assisted acid digestion of the char.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
ERA 2012 Admin Only
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 20 Oct 2011, 10:34:35 EST by System User on behalf of School of Chemical Engineering