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Groundwater radon, radium and uranium concentrations in Região dos Lagos, Rio de Janeiro State, Brazil by R.M.R. Almeida; D.C. Lauria; A.C. Ferreira; O. Sracek is a Environmental Science article available to read on EtoBox.

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Ground water from Regia ̃o dos Lagos, a coastal area of Rio de Janeiro state, was analysed for 226 Ra, 228 Ra, 222 Rn, 238 U, major ion concentrations, and physico-chemical parameters were also measured. Concentrations values ranged from <0.002 to 0.492 Bq l À1 for 226 Ra, from <0.01 to 1.50 Bq l À1 for 228 Ra and from 3 Bq l À1 ) were found only in two samples. The spatial distribution of Ra concentration delineated one distinct area and some hot spots with high Ra concentration. Low pH value is the most important water parameter linked to high radium concentration. This is probably related to limited adsorption of radium on soil ferric oxides and hydroxides at low pH range. There was a significant correlation between uranium concentrations and electrical conductivity values, and also between uranium concentrations and concentrations of Ca, Mg, Na, K, and Cl, indicating sea water impact. Uranium concentrations were lower than maximum contaminant level for drinking water, whereas 17 out of the 88 ground water samples had levels of radium that exceeded the maximum contaminant level for tap water. The total annual effective dose for adult due to the water consumption reaches values

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Author

R.M.R. Almeida; D.C. Lauria; A.C. Ferreira; O. Sracek

Publisher

Elsevier Science; Elsevier ; Elsevier BV; Publons (ISSN 0265-931X)

Published

2004

Language

EN

Field

Environmental Science (Physical Sciences)