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Extended validation of an expression to predict ORP and iron chemistry : application to complex solutions generated during the acidic leaching or bioleaching of PCBs Yue, Guikuan; Guezennec, Anne-Gwénaëlle; Asselin, Edouard
Abstract
The present work shows that the expression developed in our previous work to predict the redox potential of the quaternary H₂SO₄-Fe₂(SO₄)₃-FeSO₄-H₂O system can still be used to predict the redox potential of the Fe³⁺/Fe²⁺ couple in more complex acidic iron sulfate solutions generated during the acidic leaching and bioleaching of Printed Circuit Boards (PCBs). This expression can also be employed to determine the ferrous and ferric concentrations based on measured redox potential, temperature and total iron by AAS, especially in ferric or ferrousdominant solutions. This equation therefore provides an alternative to the traditional colorimetric or volumetric methods for ferric and ferrous determination. The applicability of this equation in acidic iron sulfate solutions containing cupric ions was also supported by the experimental results in the literature. It is also shown that the measured redox potential is highly useful to estimate and understand the iron chemistry of industrial leaching processes.
Item Metadata
Title |
Extended validation of an expression to predict ORP and iron chemistry : application to complex solutions generated during the acidic leaching or bioleaching of PCBs
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Creator | |
Publisher |
Elsevier
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Date Issued |
2016-09
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Description |
The present work shows that the expression developed in our previous work to predict the
redox potential of the quaternary H₂SO₄-Fe₂(SO₄)₃-FeSO₄-H₂O system can still be used to
predict the redox potential of the Fe³⁺/Fe²⁺ couple in more complex acidic iron sulfate solutions
generated during the acidic leaching and bioleaching of Printed Circuit Boards (PCBs). This
expression can also be employed to determine the ferrous and ferric concentrations based on
measured redox potential, temperature and total iron by AAS, especially in ferric or ferrousdominant solutions. This equation therefore provides an alternative to the traditional
colorimetric or volumetric methods for ferric and ferrous determination. The applicability of
this equation in acidic iron sulfate solutions containing cupric ions was also supported by the
experimental results in the literature. It is also shown that the measured redox potential is highly
useful to estimate and understand the iron chemistry of industrial leaching processes.
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Subject | |
Genre | |
Type | |
Language |
eng
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Date Available |
2021-06-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0398427
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URI | |
Affiliation | |
Citation |
Guikuan Yue, Anne-Gwénaëlle Guezennec, Edouard Asselin. Extended validation of an expression to predict ORP and iron chemistry: Application to complex solutions generated during the acidic leaching or bioleaching of printed circuit boards. Hydrometallurgy, Volume 164, 2016, Pages 334-342, ISSN 0304-386X.
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Publisher DOI |
10.1016/j.hydromet.2016.06.027
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty; Researcher
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International