Please use this identifier to cite or link to this item: https://doi.org/10.1021/ie901289e
Title: Mechanistic insights into copper removal by pyrolytic tire char through equilibrium studies
Authors: Quek, A.
Zhao, X.-S. 
Balasubramanian, R. 
Issue Date: 19-May-2010
Citation: Quek, A., Zhao, X.-S., Balasubramanian, R. (2010-05-19). Mechanistic insights into copper removal by pyrolytic tire char through equilibrium studies. Industrial and Engineering Chemistry Research 49 (10) : 4528-4534. ScholarBank@NUS Repository. https://doi.org/10.1021/ie901289e
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. © 2010 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
URI: http://scholarbank.nus.edu.sg/handle/10635/87547
ISSN: 08885885
DOI: 10.1021/ie901289e
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

6
checked on Sep 25, 2018

WEB OF SCIENCETM
Citations

6
checked on Sep 17, 2018

Page view(s)

40
checked on Jun 29, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.