Estimation of dose due to ingestion of 210Pb in milk from dairy cattle in the semi-arid region of Pernambuco, Brazil.

摘要

210Pb is widely distributed in the environment. In this context, the aim of this research has been: (1) to determine 210Pb concentrations in milk and dairy products from farms located in the cities of Pedra and Venturosa in Pernambuco, Brazil; and (2) to calculate the dose due to the ingestion of 210Pb in these products. The ion exchange resin method was used and the concentration of 210Pb varied from 62 to 650 mBq l-1 in fresh milk, from 202 to 1,494 mBq kg-1 in curdled cheese and from 11 to 253 mBq l-1 in milk whey. The estimated dose due to ingestion of milk and dairy products in this region was 0.2 Sv, which is at least two orders of magnitude above the maximum recommended levels.