Influences of geological factors on the distribution of uranium in drinking water limescale in the junction zone of the East European Platform and the Southern Urals

Chemosphere. 2021 Nov;282:131106. doi: 10.1016/j.chemosphere.2021.131106. Epub 2021 Jun 4.


An assessment of uranium contents and distribution in drinking water limescale has been conducted in the Republic of Bashkortostan (RB), Russia. A total of 515 limescale samples from 262 settlements of the RB were analyzed. The spread of U concentration values in limescale samples ranged from 0.01 to 61.0 μg/g. Elevated U concentrations in the West of the RB corresponded with the horsts of the granite-gneiss crystalline basement of the South-Tatar Dome and their Eastern slopes, the areas with the Lower Permian red beds and the oil and gas fields. The U migration from the granite-gneiss basement is attributed to the tectonic factor and hydrocarbons movement. Elevated concentrations of U within the South of the RB are associated primarily with the deposits of the Southern Ural brown coal basin. The Bashkir Trans-Urals anomalies are mainly associated with Lower Paleozoic eclogite complex, Devonian and Carboniferous volcanic-sedimentary, carbonate, intrusive formations, as well as the Jurassic cover of terrigenous marine sediments. The negative anomalies of the spatial distribution of U are located in the area of the Ufimian Plateau mainly composed of limestone.

Keywords: Drinking water scale; East European platform; Geochemistry; Geoecology; Radioactive elements; Republic of Bashkortostan; Southern Urals; Uranium.

MeSH terms

  • Drinking Water*
  • Geology
  • Oil and Gas Fields
  • Uranium* / analysis
  • Water Pollutants, Radioactive* / analysis


  • Drinking Water
  • Water Pollutants, Radioactive
  • Uranium