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Advanced TALSPEAK Separations Using a Malonate Buffer System.

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Title: Advanced TALSPEAK Separations Using a Malonate Buffer System.
Authors: Lapka, Joseph L.1, Nash, Kenneth L.1
Source: Solvent Extraction & Ion Exchange. 2015, Vol. 33 Issue 4, p346-361. 16p.
Subjects: Malonates, Phosphorus, Separation (Technology), Americium, Rare earth metals, Extraction (Chemistry)
Abstract: The extraction behavior of lanthanides and americium has been evaluated underAdvanced TALSPEAK(Trivalent Actinide Lanthanide Separation by Phosphorus-reagent Extraction from Aqueous Komplexes) conditions using malonic acid as the aqueous buffering agent. The extractant 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) was used as an organic phase liquid cation exchanger inn-dodecane diluent, whileN-(hydroxyethyl)-ethylenediaminetriacetic acid (HEDTA) served as a selective aqueous holdback reagent. Extractions conducted from malonate media exhibit a pH profile that flattens as the concentration of malonate is increased up to 1.0 M malonate. This relatively flat extraction behavior from pH 2.5–4.0 is reminiscent of previous studies onAdvanced TALSPEAKin lactate media. The extraction kinetics with other carboxylic acid buffers as well as the effects of varying HEDTA, HEH[EHP], and malonate concentration are compared. [ABSTRACT FROM AUTHOR]
Copyright of Solvent Extraction & Ion Exchange is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 103432185
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PubType: Academic Journal
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  Data: <searchLink fieldCode="JN" term="%22Solvent+Extraction+%26+Ion+Exchange%22">Solvent Extraction & Ion Exchange</searchLink>. 2015, Vol. 33 Issue 4, p346-361. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Malonates%22">Malonates</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphorus%22">Phosphorus</searchLink><br /><searchLink fieldCode="DE" term="%22Separation+%28Technology%29%22">Separation (Technology)</searchLink><br /><searchLink fieldCode="DE" term="%22Americium%22">Americium</searchLink><br /><searchLink fieldCode="DE" term="%22Rare+earth+metals%22">Rare earth metals</searchLink><br /><searchLink fieldCode="DE" term="%22Extraction+%28Chemistry%29%22">Extraction (Chemistry)</searchLink>
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  Data: The extraction behavior of lanthanides and americium has been evaluated underAdvanced TALSPEAK(Trivalent Actinide Lanthanide Separation by Phosphorus-reagent Extraction from Aqueous Komplexes) conditions using malonic acid as the aqueous buffering agent. The extractant 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) was used as an organic phase liquid cation exchanger inn-dodecane diluent, whileN-(hydroxyethyl)-ethylenediaminetriacetic acid (HEDTA) served as a selective aqueous holdback reagent. Extractions conducted from malonate media exhibit a pH profile that flattens as the concentration of malonate is increased up to 1.0 M malonate. This relatively flat extraction behavior from pH 2.5–4.0 is reminiscent of previous studies onAdvanced TALSPEAKin lactate media. The extraction kinetics with other carboxylic acid buffers as well as the effects of varying HEDTA, HEH[EHP], and malonate concentration are compared. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Solvent Extraction & Ion Exchange is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1080/07366299.2015.1012878
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 346
    Subjects:
      – SubjectFull: Malonates
        Type: general
      – SubjectFull: Phosphorus
        Type: general
      – SubjectFull: Separation (Technology)
        Type: general
      – SubjectFull: Americium
        Type: general
      – SubjectFull: Rare earth metals
        Type: general
      – SubjectFull: Extraction (Chemistry)
        Type: general
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      – TitleFull: Advanced TALSPEAK Separations Using a Malonate Buffer System.
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              Text: 2015
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