Natural radionuclides in water and sediments of the São Francisco River in Petrolina, Brazil
by Cleomacio Miguel Da Silva; Crescêncio Andrade Da Silva Filho
International Journal of Low Radiation (IJLR), Vol. 11, No. 2, 2019

Abstract: This study seeks to determine the concentrations of ²³⁸U, ²³²Th and ⁴⁰K in water and sediments of the São Francisco River in Petrolina. For this purpose, high resolution gamma ray spectrometry with hyperpure germanium was performed. The levels of ²³⁸U, ²³²Th and ⁴⁰K in the water samples were all under the detection limit. The concentrations of ²³⁸U, ²³²Th and ⁴⁰K in the sediments varied from 5 to 76 Bq kg⁻¹, from 11 to 521 Bq kg⁻¹, and from 80 to 542 Bq kg⁻¹, respectively. The results indicated an increase of availability of these radionuclides through the trophic chain in the São Francisco River.

Online publication date: Mon, 04-Nov-2019

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