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Use of the cation exchange equilibrium method for the determination of stability constants of Co(II) with soil humic and fulvic acids

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Abstract

The stability constants for tracer concentrations of Co(II) complexes with both the red earth humic and fulvic acids were determined at pH 5.9 and ionic strength 0.010 mol/l by using theArdakani-Stevenson cation exchange equilibrium method and the radiotracer60Co. It was found that the 1:1 complexes of Co(II) with the red earth humic and fulvic acids were formed and that the average values of logβ (stability constant) of humic and fulvic acid complexes were 5.76±0.19 and 4.42±0.03, respectively.

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Authors and Affiliations

  1. Radiochemistry Laboratory, College of Chemistry and Chemical Engineering, Lanzhou University, 730000, Lanzhou, P. R. China

    J. Z. Du, C. Y. Zhou, W. M. Dong & Z. Y. Tao

  2. China Institute for Radiation Protection, 030006, Taiyuan, P. R. China

    W. J. Li, H. Q. Zhang, X. D. Wang & Z. J. You

Authors
  1. J. Z. Du
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  2. W. J. Li
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  3. H. Q. Zhang
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  4. X. D. Wang
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  5. Z. J. You
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  6. C. Y. Zhou
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  7. W. M. Dong
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  8. Z. Y. Tao
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Du, J.Z., Li, W.J., Zhang, H.Q. et al. Use of the cation exchange equilibrium method for the determination of stability constants of Co(II) with soil humic and fulvic acids. J Radioanal Nucl Chem 241, 651–654 (1999). https://doi.org/10.1007/BF02347227

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  • DOI: https://doi.org/10.1007/BF02347227

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