Grupo de Radioecologia (RAE)-Departamento de Energia Nuclear, DEN-UFPE Avenida Professor Luiz Freire, 1000 Cidade Universitária, Recife, CEP-50740-540, Brazil.
Bull Environ Contam Toxicol. 2011 Feb;86(2):199-202. doi: 10.1007/s00128-010-0186-7. Epub 2011 Jan 4.
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.
铅（Pb）同位素 ²⁰⁶Pb 和 ²⁰⁸Pb 分别是 ²³⁸U 和 ²³²Th 放射性衰变的最终产物。巴西佩德拉和文图罗萨市的土壤中含有高浓度的这些放射性核素。我们假设，生长在这些土壤中的饲料植物可能会吸收大量的 Pb，从而使奶牛中毒。为了验证这一点，我们对该地区的 23 种饲料样本中的 Pb 浓度进行了定量分析。Pb 浓度从 5 到 344 毫克/千克不等。最高值比报道的限量高一个数量级，因此表明奶牛存在 Pb 污染的高风险。
