Vol. 4, 2019

Original research papers

Radioecology

HEAVY METALS AND RADIONUCLIDES IN MUSCLES OF FISH SPECIES IN THE SOUTH ADRIATIC – MONTENEGRO

Ivanka Antović, Danijela Šuković, Snežana Andjelić, Nikola Svrkota

Pages: 96–102

DOI: 10.37392/RapProc.2019.19

This paper deals with the concentration of Pb, Cd, Cu, Fe, Mn, Ni, Cr and Zn, and activity concentrations of 137Cs, 40K, as well as levels of 226Ra and 232Th through their daughters 214Bi and 228Ac, in muscles of six fish species from the South Adriatic Sea adjacent to Montenegro. Specimens of three mullet species from the Liza genus – Liza aurata (golden grey mullet), Liza saliens (leaping mullet) and Liza ramada(thinlip grey mullet), were caught by a trawl net in the area of Tivat – Boka Kotorska Bay, as well as Merluccius merluccius (European hake), Dicentrarchus labrax (European seabass), Sparus aurata (gilt-head sea bream). Element concentrations were determined in a standard procedure using iCAP 6000 ICP-OES and atomic absorption spectrophotometer AA-6800, whilst radionuclide activity concentrations – in a standard HPGe ORTEC gamma spectrometry. The results showed a level of 137Cs somewhat lower than in the muscles of previously analyzed the other (mullet) species from the South Adriatic, in contrast to 214Bi level which is mostly found to be slightly higher than its parent (226Ra) level in the other previously analyzed species. Committed effective dose from the annual intake of radionuclides due to an adult fish consumption is found to be highest for M. merluccius (13.8 mSv), showing all the radionuclides above minimum detectable activity. In muscle of L. aurata element concentrations were found to be ordered as: Fe>Zn>Cr>Mn>Ni>Cu>Pb>Cd. This species showed a concentration of each element higher than the other species (particularly Pb, Fe, Mn, Ni, and Cr). The concentration of Zn only could be considered as more or less comparable in all the muscles. No one muscle showed a concentration of toxic trace elements Pb and Cd exceeding the limits from the EU regulations. A potential health risk associated with Pb and Cd intake due to consumption of analyzed fish species is estimated using the target hazard quotient found to be £0.055.
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