Author(s)

D.M. Bonotto

Abstract

Groundwater from 60 pumped tubular wells of the Botucatu-Piramboia aquifer system located at the Parana sedimentary basin in Brazil were chemically analysed with the aim of evaluating if the mechanisms related to the migration of uranium can generate concentrations greater than the maximum permissible limit in drinking water, as defined by the Brazilian national standards. 1 Introduction The natural radioelement uranium is widely distributed in crustal rocks, and under conditions present at the earth's surface, it tends to be a mobile element. ^*U is the principal isotope of natural U (99.3% abundance) and is the parent nuclide in the mass number (4n+2) decay series, the longest known series. Uranium in th

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