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Title: Influence of chemical speciation on the separation of metal ions from chelating agents by nanofiltration membranes
Author: Balanyà, T
Labanda, Jordi
Llorens Llacuna, Joan
Sabaté, J
Keywords: Ions metàl·lics
Separació per membrana
Metal ions
Membrane separation
Issue Date: 1-Jan-2019
Publisher: Taylor and Francis
Abstract: The simultaneous separation of various metal ions (nickel, copper, calcium, and iron) from chelating agents (EDTA and citric acid) in water streams using Nanofiltration membranes is analyzed. Assuming that multiply-charged species are highly rejected, chemical speciation computations reproduce the observed patterns of metal and ligand rejection at different pH values and concentrations. The separation of metal ions from citric acid is achieved in acidic conditions, where multiply-charged free metal ions and neutral or singly charged free chelating species are abundant. Overall, speciation studies help to evaluate the applicability of Nanofiltration for recycling chelating agents used for metal extraction.
Note: Versió postprint del document publicat a:
It is part of: Separation Science and Technology, 2019, vol. 54, num. 1, p. 143-152
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ISSN: 0149-6395
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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