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Ionic strength and pH dependence of binding constants of Am(III)- and Eu(III)-humates

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Abstract

Binding constants of Eu(III)- and Am(III)-complexes with soil-derived humic acid were determined by solvent extraction at various pH and ionic strength. Based on the dependence of binding constants on pH and ionic strength, stabilities of the humate complexes in land water and seawater were estimated. Speciation calculation based on the binding constants indicated that Am(III) could combine with humic substances in natural water system.

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Authors and Affiliations

  1. Department of Chemistry, School of Science, University of Tokyo, Hongo, 113, Tokyo, Japan

    Y. Takahashi, Y. Minai, S. Toyoda & T. Tominaga

  2. Tokai Research Establishment, Japan Atomic Energy Research Institute, Tokai, 319-11, Ibaraki, Japan

    Y. Meguro

Authors
  1. Y. Takahashi
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  2. Y. Minai
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  3. Y. Meguro
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  4. S. Toyoda
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  5. T. Tominaga
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Takahashi, Y., Minai, Y., Meguro, Y. et al. Ionic strength and pH dependence of binding constants of Am(III)- and Eu(III)-humates. Journal of Radioanalytical and Nuclear Chemistry Letters 186, 129–141 (1994). https://doi.org/10.1007/BF02162795

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  • DOI: https://doi.org/10.1007/BF02162795

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