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

In this study, the activity concentrations of Po-210 and Pb-210 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 Po-210 were determined spectroscopically through its 530 MeV alpha particle emission, using Po-209 as an internal tracer. The Pb-210 activity concentrations were determined from the ingrowth of Po-210 assuming zero initial Po-210 activity. The results of Po-210 and Pb-210 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. Po-210/Pb-210 ratio ranged between 1.00 and 106.87. The highest Po-210 activities were found in mussels collected from Didim. (C) 2012 Elsevier Ltd. All rights reserved.Ege University Institute of Nuclear SciencesEge University [2006/NBE/001]This research work is supported by grants from Ege University Institute of Nuclear Sciences Contract No. 2006/NBE/001.WOS:0003173265000322-s2.0-84875274229PubMed: 2326063

Radionuclides (210Po and 210Pb) and Some Heavy Metals in Fish and Sediments in Lake Bafa, Turkey, and the Contribution of 210Po to the Radiation Dose

The pollution level of Lake Bafa was investigated by collecting fish samples {Dicentrarchus labrax (sea bass), Liza ramada (mullet) and Anguilla anguilla (eel)}, surface sediment, and core samples. In all these samples, 210Po and 210Pb concentrations were estimated, and total annual dose rates were obtained for each species. Some heavy metal (Cr, Ni, Pb, Cd, Mn, Fe, and Zn) concentration levels were obtained for the fish and a core sample. The sediment mass accumulation rate was found to be 3.27 g·m−2·day−1 (0.119 g·cm−2·y−1) from a core sample. The heavy metal concentrations in the vertical profile of samples from the core were also observed. The measured concentration of Zn, Pb, Cd, and Cr were between the ERL (effects range low) and ERM (effects range median) limits, while Ni concentrations were higher than the ERM limit. The observed concentrations of Cd, Pb, and Zn in fish samples did not exceed the limits in accordance with Turkish Food Regulations. Further, the maximum effective dose equivalent of 210Po in the area was found to be 1.169 µSv·y−1

Seasonal variation of the concentrations of Cs-137 in sediment, sea water, and some organisms collected from Izmir Bay and Didim

Cs-137 in the marine environment mainly originates from fallout of atmospheric nuclear weapon tests, accidental releases from nuclear facilities, and from the Chernobyl accident. After the latter accident, many studies have been carried out in Turkey. The objective of this study is to assess the spatial distribution of Cs-137 in the coastal marine environment of the Aegean Sea. The concentrat'ions of Cs-137 in sediment, sea water, mussel (Mytilus galloprovincialis), and fish samples collected from the coast of the Aegean Sea at Izmir Bay and near Didim (Akbuk) have been monitored for seasonal variability by the means of gamma spectroscopy: they vary between 0.10 +/- 0.01 and 1.5 +/- 0.3 Bq kg 1, 1.3 +/- 0.1 and 4.3 +/- 0.4 Bq m(-3), < 0.2 and 1.3 +/- 0.3 Bq kg(-1), and 0.20 +/- 0.03 and 1.8 +/- 0.3 Bq kg(-1), respectively.WOS:0003414388000022-s2.0-8494027499