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2016 | OriginalPaper | Buchkapitel

3. Mechanisms of Radon Emanation and Long-Term Radon Flux Studies

verfasst von : Mark Baskaran

Erschienen in: Radon: A Tracer for Geological, Geophysical and Geochemical Studies

Verlag: Springer International Publishing

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Abstract

The temporal and spatial variations in the release rates of radon from earth materials in to air and water have been widely recognized for several decades. One of the most important factors that affect the radon concentration in indoor (note that indoor air radon concentrations have direct health implications, chapter-11) and outdoor air is the rate of release of radon and its subsequent transport. The radon emanation coefficient in naturally-occurring rocks, minerals and soils varies over five orders of magnitude. Towards the effective use of radon as a tracer for geological, geophysical and geochemical studies, investigations on the factors and processes that cause concentration gradients of ²²²Rn in both air and water are essential. In this chapter, the mechanisms of and factors affecting radon release rates are presented. In-depth discussion on how key parameters such as pressure, temperature, moisture, mineralogy and grain size affect the release rates of radon and its subsequent transport is presented. Large-scale well-coordinated efforts around the globe, both on continental and national scale, on radon flux measurements have been conducted and results from those efforts are summarized. Radon flux studies from continents and oceans are reviewed and a compilation of long-term global ²²²Rn flux is presented. Radon emanation rate averaged over 32 years (based on the inventory of ²¹⁰Pb) along with the global radon emanation rate curve is given.

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Titel: Mechanisms of Radon Emanation and Long-Term Radon Flux Studies
verfasst von: Mark Baskaran
Verlag: Springer International Publishing
Buch: Radon: A Tracer for Geological, Geophysical and Geochemical Studies
Print ISBN: 978-3-319-21328-6

Electronic ISBN: 978-3-319-21329-3

Copyright-Jahr: 2016
DOI: https://doi.org/10.1007/978-3-319-21329-3_3