The use of electrolyte redox potential to monitor the Ce(IV)/Ce(III) couple
The use of electrolyte redox potential to monitor the Ce(IV)/Ce(III) couple
Mathematical modelling of the oxidation reduction redox potential (ORP) of an electrolyte has been carried out for a batch system comprising an electrochemical reactor and an electrolyte circuit containing a redox couple. The ORP can be useful to monitor the environmental impact of chemical species in solution that represent a risk to the environment. Considerations of four fundamental equations, namely, the Nernst equation, a mass balance, Faraday's laws of electrolysis and a first order kinetic equation, leads to an expression for the electrolyte redox potential as a function of the batch time, the electrical charge and the redox concentration. Such an expression facilitates graphical plots which can be used to estimate kinetic parameters, current efficiency and the relative redox concentration. The Ce(IV)/Ce(III) system has been chosen as a model reaction for electrolyte redox potential measurement in a batch recycle system consisting of a pumped flow through a divided FM01-LC parallel plate electrochemical reactor (64 cm2 projected electrode area) and a well mixed tank (3,600 cm3). The differences between experimental and model predictions are discussed.
batch electrolysis, ce(III) ion, ce(IV) ion, open-circuit redox potential, orp
1417-1425
Trinidad, P.
9307f16b-d514-470a-8489-ab8eb9c833e5
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
September 2008
Trinidad, P.
9307f16b-d514-470a-8489-ab8eb9c833e5
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Trinidad, P., Ponce de León, C. and Walsh, F.C.
(2008)
The use of electrolyte redox potential to monitor the Ce(IV)/Ce(III) couple.
Journal of Environmental Management, 88 (4), .
(doi:10.1016/j.jenvman.2007.07.007).
Abstract
Mathematical modelling of the oxidation reduction redox potential (ORP) of an electrolyte has been carried out for a batch system comprising an electrochemical reactor and an electrolyte circuit containing a redox couple. The ORP can be useful to monitor the environmental impact of chemical species in solution that represent a risk to the environment. Considerations of four fundamental equations, namely, the Nernst equation, a mass balance, Faraday's laws of electrolysis and a first order kinetic equation, leads to an expression for the electrolyte redox potential as a function of the batch time, the electrical charge and the redox concentration. Such an expression facilitates graphical plots which can be used to estimate kinetic parameters, current efficiency and the relative redox concentration. The Ce(IV)/Ce(III) system has been chosen as a model reaction for electrolyte redox potential measurement in a batch recycle system consisting of a pumped flow through a divided FM01-LC parallel plate electrochemical reactor (64 cm2 projected electrode area) and a well mixed tank (3,600 cm3). The differences between experimental and model predictions are discussed.
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Submitted date: 20 July 2006
Published date: September 2008
Keywords:
batch electrolysis, ce(III) ion, ce(IV) ion, open-circuit redox potential, orp
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 54768
URI: http://eprints.soton.ac.uk/id/eprint/54768
ISSN: 0301-4797
PURE UUID: b9760a74-8be8-4b22-9330-b468938111ba
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Date deposited: 04 Aug 2008
Last modified: 16 Mar 2024 03:43
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Author:
P. Trinidad
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