广东省部分海产品中^(210)Pb、^(210)Po监测

Activities of ^(210)Pb and ^(210)Po in Marine Organisms in Coastal Areas of Guangdong Province

对广东近岸海水和部分海产品中^(210)Pb与^(210)Po含量进行监测。结果表明,海水中^(210)Pb含量范围为1.19~3.98 mBq/L,^(210)Po含量为0.81~2.14 m Bq/L;海产品可食部分^(210)Pb含量范围为0.13~3.26 Bq/kg(鲜),均值为1.68±0.97 Bq/kg(鲜);^(210)Po含量范围为0.23~25.8 Bq/kg(鲜),均值为11.8±8.9 Bq/kg(鲜)。贝类^(210)Po含量普遍比其他种类高,其中牡蛎、扇贝、翡翠贻贝中^(210)Pb平均含量均超过了我国现行国家标准限值。牡蛎中^(210)Pb与^(210)Po含量与海水中可溶性的^(210)Pb与^(210)Po含量无相关性。

This study presented the distribution of^210Pb and ^210Po activity concentrations in seawater and marine organisms from the coastal areas of Guangdong Province. The results showed that^210Pb and ^210Po activitiesin seawater were 1.19 - 3.98 mBq/L and 0.81 - 2.14 mBq/L,respectively. In the edible part of the marineorganisms the^210Pb activity concentrations were in the range from 0.13 to 3.26 Bq/kg fresh weight with a meanof 1.68 ± 0.97 Bq/kg fresh weight and ^210Po activity concentrations from 0.23 to 25.8 Bq/kg fresh weight witha mean of 11. 8 ± 8. 9 Bq/kg fresh weight . The^210Pb activities in different species present little variabilitieswhile210Po activities present marked variabilities . The^210Po activities in molluscs were higher than other species,especially the oysters,scallops and mussels . The average^210Po activity concentrations of oysters,scallopsand mussels even exceeded the limit value of radioactive substances in the current national standards of food.Activities of^210Pb and ^210Po in seawater and oysters from different sampling sites showed that there was no correlation between activities of^210Pb and ^210Po in oysters and dissolved ^210Pb and ^210Po in seawater .