Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcis.2010.12.025
Title: Removal of copper by oxygenated pyrolytic tire char: Kinetics and mechanistic insights
Authors: Quek, A.
Balasubramanian, R. 
Keywords: Film diffusion
Kinetic model
Oxygenation
Pyrolysis
Tires
Issue Date: 1-Apr-2011
Source: Quek, A., Balasubramanian, R. (2011-04-01). Removal of copper by oxygenated pyrolytic tire char: Kinetics and mechanistic insights. Journal of Colloid and Interface Science 356 (1) : 203-210. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.12.025
Abstract: The kinetics of copper ion (Cu(II)) removal from aqueous solution by pyrolytic tire char was modeled using five different conventional models. A modification to these models was also developed through a modified equation that accounts for precipitation. Conventional first- and second-order reaction models did not fit the copper sorption kinetics well, indicating a lack of simple rate-order dependency on solute concentration. Instead, a reversible first-order rate reaction showed the best fit to the data, indicating a dependence on surface functional groups. Due to the varying solution pH during the sorption process, modified external and internal mass transfer models were employed. Results showed that the sorption of copper onto oxygenated chars was limited by external mass transfer and internal resistance with and without the modification. However, the modification of the sorption process produced very different results for unoxygenated chars, which showed neither internal nor external limitation to sorption. Instead, its slow sorption rate indicates a lack of surface functional groups. The sorption of Cu(II) by oxygenated and unoxygenated chars was also found to occur via three and two distinct stages, respectively. © 2010 Elsevier Inc.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/59187
ISSN: 00219797
DOI: 10.1016/j.jcis.2010.12.025
Appears in Collections:Staff Publications

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

SCOPUSTM   
Citations

9
checked on Dec 6, 2017

WEB OF SCIENCETM
Citations

8
checked on Nov 18, 2017

Page view(s)

24
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


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