Ingestion of 210 Pb and 210 Po through fish consumption in the Cananeia-Iguape system, Sao Paulo State, Brazil

In this work the ingestion of 210 Pb and 210 Po in the Cananeia - Iguape System, coast south of the Sao Paulo State was estimated. After the dissolution of the fish muscle (by microwave) radiochemical methods were applied for the analysis of those radionuclides.210 Pb was detected by using a Geiger-Muller detector while 210 Po by alpha spectrometry. The estimates of individual ingestion of 210 Pb and 210 Po for the fish of higher economical importance for the population of the System were of 0.004 and 0.035 Bq.d-1, respectively. Although, the levels of individual ingestion of these radionuclides obtained in this work are below the recommended levels it is advisable a periodic monitoring of these radionuclides in estuarine samples, especially, for the organisms such as fish that can be used as bio-indicators of 210 Pb and 210 Po. (author)