Keywords: natural radionuclides, environmental contamination, food chain, aquatic environment, sediments, fruit farming, agriculture, environmental pollution, water pollution, low radiation
228Ra, 226Ra and 210Pb in sediment and water of the São Francisco River in Petrolina
The purpose of this of this research is to determine 228Ra, 226Ra and 210Pb concentrations in the water and sediment of the São Francisco River, nearby from farms producing fruits in Petrolina City. Concentrations of 228Ra, 210Pb and 226Ra in the water samples varied from <19.0 (detection limit) to 22.0 mBq.l−1; <4.0 (detection limit) to 13.0 mBq.l−1; and 12.0 to 42.0 mBq.l−1, respectively. For sediments samples, in this order, the concentrations ranged from <7.0 (detection limit) to 35.0 Bq.kg−1; <3.5 (detection limit) to 15.0 Bq.kg−1; and 12.0 to 92 Bq.kg−1. These results indicate that there are spots in São Francisco River, Petrolina, which have high concentrations of 228Ra, 226Ra and 210Pb in sediments.