Seasonal and spatial variations of 210Po and 210Pb activity concentrations in Mytilus galloprovincialis from Croatian coast of the Adriatic Sea.
Results of 2 years monitoring of (210)Po and (210)Pb activity concentrations in soft tissue of the species Mytilus galloprovincialis from Croatian part of the Adriatic coast are presented. The samples were collected at thirteen coastal stations (some of which are also a part of the Mediterranean Mussel Watch Project) in spring and autumn of 2010 and 2011. The collected mussels were ranging between 4 cm and 6 cm in shell length. After sample pre-treatment lead and polonium were radiochemically separated on Sr resin. (210)Po was determined by alpha-particle spectrometry and (210)Pb was determined, via (210)Bi, by a low-level gas proportional counter. The results of (210)Po activity concentrations were found to vary between (104±11) and (1421±81) Bq kg(-1) dry weight while (210)Pb activity concentrations were much lower and in range (8.2±5.3)-(94.1±29.8) Bq kg(-1) dry weight. Higher (210)Po and (210)Pb activity concentrations were determined in spring period. The inter-site differences seen in their activity concentrations can be due to natural background levels of sites. The (210)Po/(210)Pb activity concentration ratios in all cases exceeded unity for all mussel samples and ranged between 4.0 and 47.9.
Rudjer Boskovic Institute, Bijenicka cesta 54, 10000 Zagreb, Croatia; Environment Laboratories, International Atomic Energy Agency, 4 Quai Antoine 1er, MC 98000, Monaco. Electronic address: rozmar@irb.hr.
Martina
M
Rožmarić
Matea
M
Rogić
Ljudmila
L
Benedik
Marko
M
Štrok
Delko
D
Barišić
D000818:Animals; D017523:Croatia; D007856:Lead Radioisotopes / Q000378:metabolism*; D008522:Mediterranean Sea; D049878:Mytilus / Q000378:metabolism*; D011059:Polonium / Q000378:metabolism*; D011834:Radiation Monitoring; D012621:Seasons; D014875:Water Pollutants, Radioactive / Q000378:metabolism*
D007856:Lead Radioisotopes; D014875:Water Pollutants, Radioactive; D011059:Polonium
(210)Pb; (210)Po; Adriatic Sea; Mytilus galloprovincialis