Journal of the Oceanographical Society of Japan

, Volume 37, Issue 3, pp 145–147 | Cite as

Study on the chemical forms of radionuclides in seawater-III complexes of60Co with amino acids

  • Shigeki Hirano
  • Taku Koyanagi
Article

Abstract

Stability constants were determined for60Co (II)-amino acid complexes in sodium perchlorate media at an ionic strengthμ=0.67, using cation exchange resins. Stability constants were, for Co(II)-phenylalanine, logβ1=4.4, logβ2=8.2, logβ3=11.7, for Co(II)-histidine, logβ1=7.4. for Co(II)-valine, logβ1=4.3, logβ2=8.5, for Co(II)-proline, logβ1=4.1, and for Co(II)-tyrosine, logβ1=7.2, respectively. The abundance of Co(II)-amino acid complexes in seawater was calculated from these stability constants on the basis of chemical equilibrium, assuming the concentration of individual amino acid to be 10−7 to 10−8 mol l−1. It was inferred that the Co(II)-amino acid complexes are probably not formed abundantly in seawater while inorganic species of60Co(II) may still be dominant for a short period of time after discharge into seawater as liquid waste.

Keywords

Sodium Tyrosine Proline Radionuclide Histidine 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Clark, M. E., G. A. Jackson andW. J. North (1972): Dissolved free amino acids in Southern California coastal waters. Limnol. Oceanogr.17, 749–758.Google Scholar
  2. Dyrssen, D. andM. Wedborg (1974): Equilibrium calculations of the speciation of elements in sea water.In “Sea”, ed. byM.N. Hill, A.E. Maxwell andE.D. Goldberg, Wiley, New York, pp. 181–195.Google Scholar
  3. Hirano, S. andT. Koyanagi (1978): A Study on the chemical forms of radionuclides in seawater —I, Chloride, sulfate and hydroxide complexes of114Ce. J. Oceangr. Soc. Japan,34, 269–275.Google Scholar
  4. Hirano, S. andT. Koyanagi (1980): A study on the chemical forms of radionuclides in seawater —II. Chloride and sulfate complexes of60Co. J. Oceanogr. Soc. Japan,36, 35–38.CrossRefGoogle Scholar
  5. Kent, F. andF.F. Hooper (1966): Synthetic detergents-their Influence upon Fe-binding complexes of natural waters. Science,153, 526–527.Google Scholar
  6. Provasoli, L. (1963): Organic regulation of phytoplankton fertility.In “The Sea”, Vol. II, ed. byM.N. Hill, Interscience, New York, pp. 165–219.Google Scholar
  7. Riley, J.P. andD.E. Segar (1970): The seasonal variation of the free and combined dissolved amino acids in the Irish Sea. J. Mar. Biol. Ass. U.K.,50, 713–720.Google Scholar
  8. Siegel, A. (1971):In “Organic Compounds and the Aquatic Environment” ed. byS.P. Faust andJ.V. Hunter, Dekker, New York, pp. 265–295.Google Scholar
  9. Sugimura, Y., Y. Suzuki andY. Miyake (1978): Chemical forms of minor metallic elements in the Ocean. J. Oceanogr. Soc. Japan,34, 93–96.CrossRefGoogle Scholar

Copyright information

© the Oceanographical Society of Japan 1981

Authors and Affiliations

  • Shigeki Hirano
    • 1
  • Taku Koyanagi
    • 1
  1. 1.Division of Marine Radioecology, Nakaminato LaboratoryNational Institute of Radiological SciencesIsozaki, Nakaminato, IbarakiJapan

Personalised recommendations