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Related Experiment Videos

Nickel-63 in Baltic fish and sediments

B Skwarzec1, E Holm, P Roos

  • 1Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|May 1, 1994
PubMed
Summary

Nickel-63 (63Ni) in Baltic Sea fish like cod and herring concentrates on skin and scales, suggesting surface adsorption as the primary uptake mechanism. Sediment analysis revealed 63Ni concentrations ranging from 0.5 to 3.8 mBq/g dry wt.

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Area of Science:

  • Environmental Science
  • Marine Biology
  • Radiochemistry

Background:

  • Nickel-63 (63Ni) is a radionuclide of environmental concern.
  • Understanding its distribution in marine ecosystems is crucial for risk assessment.

Purpose of the Study:

  • To determine the distribution and concentration of 63Ni in fish (cod, herring, sprat) and sediment from Gdańsk Bay.
  • To investigate the uptake mechanism of 63Ni in fish species.

Main Methods:

  • Radiochemical analysis of 63Ni in fish tissues (fillet, skin, scale) and sediment cores.
  • Measurement of 63Ni concentration and specific activity in environmental samples.

Main Results:

  • 63Ni is non-uniformly distributed in fish, with over 95% found in the fillet with skin and scale for cod and herring.

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  • Sediment 63Ni concentrations ranged from 0.5 to 3.8 mBq/g dry wt.
  • Specific activity of 63Ni in sediment varied between 10 and 70 Bq/g.

    • Conclusions:

    • Passive adsorption onto skin and scale mucus is the likely mechanism for 63Ni uptake in cod and herring.
    • The findings highlight the importance of skin and scales in bioaccumulation studies of 63Ni.