Modelling of the Extraction and Back-Extraction Equilibria of Zinc from Spent Pickling Solutions
This work reports the study of the chemical equilibria of the extraction and back-extraction of zinc from spent pickling solutions. Tributyl phosphate was used as a selective extractant and service water as a back extraction agent. Feed solutions had an average composition of 6.4 M Cl − , 1.2 M Zn +...
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Published in | Separation science and technology Vol. 41; no. 4; pp. 757 - 769 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis Group
01.04.2006
|
Subjects | |
Online Access | Get full text |
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Summary: | This work reports the study of the chemical equilibria of the extraction and back-extraction of zinc from spent pickling solutions. Tributyl phosphate was used as a selective extractant and service water as a back extraction agent. Feed solutions had an average composition of 6.4 M Cl
−
, 1.2 M Zn
+2
, 1.7 M Fe
+2
and traces of other heavy metals i.e., Pb, Ni, Cu, Mn. Under the experimental conditions the ion ZnCl
4
2−
was the predominant zinc species in feed. A careful experimental design was performed obtaining the equilibria mathematical models and parameters, K
EX
=0.137 (mol/L)
−4
, and K
BEX
=1.46 [−]. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0149-6395 1520-5754 |
DOI: | 10.1080/01496390600552289 |