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Silva C.M.,Grupo de Radioecologia RAE | Amaral R.S.,Grupo de Radioecologia RAE | Ribeiro F.C.A.,Brazilian Northeast Regional Center of Nuclear Science (CRCN-NE) | Tabosa J.N.,Grupo de Radioecologia RAE | And 2 more authors.
Bulletin of Environmental Contamination and Toxicology | Year: 2011

The lead (Pb) isotopes 206Pb and 208Pb are the final products of the radioactive decay of 238U and 232Th, respectively. Soils in the municipalities of Pedra and Venturosa, Brazil, present high levels of these radionuclides. We hypothesized that forage plants growing in these soils may take up high amounts of Pb and, consequently, intoxicate dairy cows. To test this, we quantified Pb concentrations in 23 forage samples from this region. Pb concentrations varied from 5 to 344 mg kg -1. The highest values are one order of magnitude above the reported limit, therefore, indicating high risk of Pb contamination for dairy cows. © 2011 Springer Science+Business Media, LLC.


Silva C.M.,Grupo de Radioecologia RAE | Amaral R.S.,Grupo de Radioecologia RAE | Tabosa J.N.,Grupo de Radioecologia RAE | Junior J.A.S.,Grupo de Radioecologia RAE | And 2 more authors.
Bulletin of Environmental Contamination and Toxicology | Year: 2010

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. © 2010 Springer Science+Business Media, LLC.

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