Time variations of 222Rn concentration and air exchange rates in a Hungarian cave

Hedvig Éva Nagy, Zsuzsanna Szabó, Gyozo Jordán, Csaba Szabó, Ákos Horváth, Attila Kiss

Research output: Contribution to journalArticle

9 Citations (Scopus)


A long-term radon concentration monitoring was carried out in the Pál-völgy cave, Budapest, Hungary, for 1.5 years. Our major goal was to determine the time dependence of the radon concentration in the cave to characterise the air exchange and define the most important environmental parameters that influence the radon concentration inside the cave. The radon concentration in the cave air was measured continuously by an AlphaGuard radon monitor, and meteorological parameters outside the cave were collected simultaneously. The air's radon concentration in the cave varied between 104 and 7776 Bq m -3, the annual average value was 1884±85 Bq m -3. The summer to winter radon concentration ratio was as high as 21.8. The outside air temperature showed the strongest correlation with the radon concentration in the cave, the correlation coefficient (R) was 0.76.

Original languageEnglish
Pages (from-to)464-472
Number of pages9
JournalIsotopes in Environmental and Health Studies
Issue number3
Publication statusPublished - Sep 1 2012



  • Hungary
  • cave
  • natural radioactivity
  • radon-222
  • seasonal periodicity
  • time dependence

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)
  • Inorganic Chemistry

Cite this