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SimpleModel for Characterizing a Donnan DialysisProcess.

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Title: SimpleModel for Characterizing a Donnan DialysisProcess.
Authors: Hasson, David1, Beck, Adam1, Fingerman, Fiana1, Tachman, Chen1, Shemer, Hilla1, Semiat, Raphael1
Source: Industrial & Engineering Chemistry Research. Apr2014, Vol. 53 Issue 14, p6094-6102. 9p.
Subjects: Donnan equilibrium, Dialysis (Chemistry), Chemical processes, Pressure, Solution (Chemistry), Diffusion
Abstract: The objective of this work is tocharacterize the kinetics of Donnandialysis process by a simple model. The Nernst–Planck equationis simplified by neglecting the membrane swelling pressure and assumingan average diffusion coefficient for all ions. Experimental data arepresented on the permeation of monovalent phosphate ions from a KH2PO4/NaH2PO4feed solutionto a NaCl receiver solution using two different anion exchange membranes:a low flux membrane (Fumasep FAB) and a high flux membrane (SelemionAMV). Measurements indicate a brief initial ion exchange process inwhich the membrane is loaded with phosphate ions. Phosphate transportdata fit the predicted correlations and provide values of the overallkinetic coefficient. The kinetic coefficients derived from both membraneswere found to increase linearly with the membrane phosphate concentration.The phosphate dialysis data of the low flux membrane were found tobe controlled by a diffusive process, while the data of the high fluxmembrane were found to be mass transfer controlled. The increase ofthe kinetic coefficient with phosphate concentration is shown to berelated to the increase in membrane ion diffusivity with its solutionconcentration. [ABSTRACT FROM AUTHOR]
Copyright of Industrial & Engineering Chemistry Research is the property of American Chemical Society 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.)
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  Data: <searchLink fieldCode="JN" term="%22Industrial+%26+Engineering+Chemistry+Research%22">Industrial & Engineering Chemistry Research</searchLink>. Apr2014, Vol. 53 Issue 14, p6094-6102. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Donnan+equilibrium%22">Donnan equilibrium</searchLink><br /><searchLink fieldCode="DE" term="%22Dialysis+%28Chemistry%29%22">Dialysis (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+processes%22">Chemical processes</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure%22">Pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Solution+%28Chemistry%29%22">Solution (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Diffusion%22">Diffusion</searchLink>
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  Data: The objective of this work is tocharacterize the kinetics of Donnandialysis process by a simple model. The Nernst–Planck equationis simplified by neglecting the membrane swelling pressure and assumingan average diffusion coefficient for all ions. Experimental data arepresented on the permeation of monovalent phosphate ions from a KH2PO4/NaH2PO4feed solutionto a NaCl receiver solution using two different anion exchange membranes:a low flux membrane (Fumasep FAB) and a high flux membrane (SelemionAMV). Measurements indicate a brief initial ion exchange process inwhich the membrane is loaded with phosphate ions. Phosphate transportdata fit the predicted correlations and provide values of the overallkinetic coefficient. The kinetic coefficients derived from both membraneswere found to increase linearly with the membrane phosphate concentration.The phosphate dialysis data of the low flux membrane were found tobe controlled by a diffusive process, while the data of the high fluxmembrane were found to be mass transfer controlled. The increase ofthe kinetic coefficient with phosphate concentration is shown to berelated to the increase in membrane ion diffusivity with its solutionconcentration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Industrial & Engineering Chemistry Research is the property of American Chemical Society 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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      – Type: doi
        Value: 10.1021/ie404291q
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 9
        StartPage: 6094
    Subjects:
      – SubjectFull: Donnan equilibrium
        Type: general
      – SubjectFull: Dialysis (Chemistry)
        Type: general
      – SubjectFull: Chemical processes
        Type: general
      – SubjectFull: Pressure
        Type: general
      – SubjectFull: Solution (Chemistry)
        Type: general
      – SubjectFull: Diffusion
        Type: general
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      – TitleFull: SimpleModel for Characterizing a Donnan DialysisProcess.
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            NameFull: Beck, Adam
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            NameFull: Shemer, Hilla
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              M: 04
              Text: Apr2014
              Type: published
              Y: 2014
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