Levels of 210Po and 210Pb in mussel and sediments in Candarli Gulf and the related dose assessment to the coastal population.

(210)Po and (210)Pb in mussel (Mytilus galloprovincialis) and sediment samples collected at Candarli Gulf during the period of 2010-2012 are presented and discussed. The activity concentrations of (210)Po and (210)Pb were measured by means of alpha spectrometry. Activity concentrations of (210)Po and (210)Pb in mussels are in the ranged of 332±17-776±23 Bq kg(-1)dw and 14±1-40±5 Bq kg(-1) dw, for sediments the ranges for 52±5-109±8 Bq kg(-1)dw and 38±5-92±9 Bq kg(-1) dw, respectively. The estimated consequent annual effective ingestion dose due to (210)Po and (210)Pb from mussel consumption in Candarli Gulf coastal region were calculated. The highest dose due to (210)Po and (210)Po were calculated to be 4232±126 µSv and 126±16 µSv, respectively.

Levels of (210)Po in some commercial fish species consumed in the Aegean Sea coast of Turkey and the related dose assessment to the coastal population.

Concentrations of (210)Po were determined in the edible muscle tissue of five species of marine fish: Sardine (Sardine plichardus) and Anchovy (Engraulis encrasicolus), Red mullet (Mullus barbatus), Horse mackerel (Trachurus trachurus) and Gilt-head sea bream (Sparus aurata) collected from five stations in the Aegean Sea Region of Turkey during the fishery season 2010. The (210)Po concentrations in the fish samples were found to vary from not detected levels to 389 ± 45 Bq kg(-1) dry wt. These variations in (210)Po content in different species are probably due to differences in metabolism and feeding patterns. The highest levels for (210)Po were observed in Anchovy (E. encrasicolus) species.

Variations of 210Po and 210Pb concentration in mussels (Mytilus galloprovincialis) from Didim and Izmir Bay (Turkish coast of Aegean Sea).

In this study, the activity concentrations of (210)Po and (210)Pb were determined in mussels (Mytilus galloprovincialis) collected from Didim and Izmir Bay (Turkish coast of Aegean Sea) during the period of April 2006-March 2007. The concentrations activity of (210)Po were determined spectroscopically through its 5.30 MeV alpha particle emission, using (209)Po as an internal tracer. The (210)Pb activity concentrations were determined from the ingrowth of (210)Po, assuming zero initial (210)Po activity. The results of (210)Po and (210)Pb activity concentrations were found to vary between 34 ± 9 and 1855 ± 98 Bq kg(-1) dry weight and ND (lower than limit of detection) - 64 ± 6 Bq kg(-1) dry weight, respectively. (210)Po/(210)Pb ratio ranged between 1.00 and 106.87. The highest (210)Po activities were found in mussels collected from Didim.

Activity levels of (210)Po and (210)Pb in some fish species of the Izmir Bay (Aegean Sea).

Concentrations of ²¹°Po and ²¹°Pb were determined in the edible muscle tissue of twelve species of marine fish collected from Izmir Bay in the Aegean Sea Region of Turkey during the 2006-2007. ²¹°Po activity concentrations in fish samples were found to vary from ND to 400±9 Bq kg⁻¹ dry weight and ²¹°Pb activity concentrations were found to vary from ND to 15±3 Bq kg⁻¹ dry weight. The highest dose contribution due to ²¹°Po to humans was found to be 8.908 µSv y⁻¹.

Distribution of natural radionuclide concentrations in sediment samples in Didim and Izmir Bay (Aegean Sea-Turkey).

Natural and artificial radionuclide pollutants of the marine environment have been recognized as a serious environmental concern. The natural radioactivity activity concentrations of (226)Ra, (238)U, (232)Th and (40)K were measured by gamma spectrometry in sediment samples collected from two different areas in Aegean Sea Turkish Coast. There is no information about radioactivity level in the study areas sediments so far. The results showed that the concentrations of activity in the sediment samples are 9 ± 0.6 Bq kg(-1)-12 ± 0.7 Bq kg(-1), 7 ± 0.4 Bq kg(-1)-16 ± 1.0 Bq kg(-1), 6 ± 0.3 Bq kg(-1)-16 ± 1.0 Bq kg(-1) and 250 ± 13 Bq kg(-1)-665 ± 33 Bq kg(-1) for (226)Ra, (238)U, (232)Th and (40)K, respectively. In general, the distribution of activity concentrations along the coast of the Aegean Sea area were in the same order as international levels.