Modelling the fate of uranium from inorganic phosphorus fertilizer applications in agriculture

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Abstract

We used the recently developed HP1 coupled geochemical transport code to calculate U-fluxes to groundwater originating from application of inorganic P-fertilizers to an agricultural field. The HP1 code was found to be a very convenient tool for studying interactions between water content and flow conditions, changes in pH, and retention of U. Results show that U will migrate considerable faster during transient flow conditions as compared to steady-state flow. A steady-state flow approach hence can only partially account for the various coupled physical and geochemical interactions in the vadose zone, whereas short-term variations involving considerable temporal variability require a transient model. Calculations of the radiological impact of U-containing groundwater demonstrate that the annual total dose owing to consumption of groundwater would not lead to values exceeding the natural background dose.

Details

Original languageEnglish
Title of host publicationLoads and fate of fertilizer-derived uranium
Place of PublicationLeiden, Netherlands
PublisherBackhuys Publishers
Pages57-64
Edition1
ISBN (Print)978-90-5782-193-6
Publication statusPublished - Sep 2008

Keywords

  • reactive transport modelling, vadoze zone, U-leaching, P-fertilization, dose calculation

ID: 135818