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Uranium in groundwater -- Fertilizers versus geogenic sources

Liesch, Tanja ; Hinrichsen, Soren ; Goldscheider, Nico

The Science of the Total Environment, Dec 1, 2015, Vol.536, p.981 [Periódico revisado por pares]

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  • Título:
    Uranium in groundwater -- Fertilizers versus geogenic sources
  • Autor: Liesch, Tanja ; Hinrichsen, Soren ; Goldscheider, Nico
  • Assuntos: Groundwater – Analysis ; Phosphate Fertilizers – Analysis ; Hydrogeology – Analysis ; Aquifers – Analysis ; Uranium – Analysis ; Lithosphere – Analysis ; Agricultural Land – Analysis ; Phosphates – Analysis
  • É parte de: The Science of the Total Environment, Dec 1, 2015, Vol.536, p.981
  • Descrição: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.scitotenv.2015.05.133 Byline: Tanja Liesch [tanja.liesch@kit.edu] (*), Soren Hinrichsen, Nico Goldscheider Keywords Uranium; Groundwater; Drinking water; Fertilizer; Geogenic background Highlights * Uranium concentrations in groundwater in Southwest Germany mainly depend on geology. * Only 1.6% of 1935 samples exceed the German legal limit for drinking water of 10 [mu]g/L. * The percentage of positive uranium detections (> 0.5 [mu]g/L) is higher in agricultural areas. * Phosphate fertilizers cause significant increase of uranium in groundwater at low concentration levels. Abstract Due to its radiological and toxicological properties even at low concentration levels, uranium is increasingly recognized as relevant contaminant in drinking water from aquifers. Uranium originates from different sources, including natural or geogenic, mining and industrial activities, and fertilizers in agriculture. The goal of this study was to obtain insights into the origin of uranium in groundwater while differentiating between geogenic sources and fertilizers. A literature review concerning the sources and geochemical processes affecting the occurrence and distribution of uranium in the lithosphere, pedosphere and hydrosphere provided the background for the evaluation of data on uranium in groundwater at regional scale. The state of Baden-Wurttemberg, Germany, was selected for this study, because of its hydrogeological and land-use diversity, and for reasons of data availability. Uranium and other parameters from N = 1935 groundwater monitoring sites were analyzed statistically and geospatially. Results show that (i) 1.6% of all water samples exceed the German legal limit for drinking water (10 [mu]g/L); (ii) The range and spatial distribution of uranium and occasional peak values seem to be related to geogenic sources; (iii) There is a clear relation between agricultural land-use and low-level uranium concentrations, indicating that fertilizers generate a measurable but low background of uranium in groundwater. Author Affiliation: Institute of Applied Geosciences, Division of Hydrogeology, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany * Corresponding author. Article History: Received 2 January 2015; Revised 29 May 2015; Accepted 29 May 2015 (miscellaneous) Editor: D. Barcelo
  • Idioma: Inglês

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