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Title (Primary) In situ determination of radon in surface water bodies by means of a hydrophobic membrane tubing
Author Schubert, M.; Schmidt, A.; Paschke, A.; Lopez, A.; Balcázar, M.;
Journal Radiation Measurements
Year 2008
Department OEC; ANA;
Volume 43
Issue 1
Language englisch;
Keywords Radon; Water; In situ Determination; Membrane extraction; Environmental tracer
Abstract The naturally occurring radioisotope 222-radon is increasingly recognized as a powerful environmental tracer in hydrology. Several studies proved its applicability for the investigation of groundwater migration processes or of interactions between surface waters and groundwater. While the determination of radon-in-water concentrations is generally done in the laboratory by means of liquid scintillation counting, radon-in-water concentrations can also be measured right away in the field by stripping radon from a water sample into a gas volume and measuring the respective radon-in-gas concentration using a portable radon-in-gas monitor. However, one of the major obstacles of such on-site determination is the potential loss of radon during water sampling and sample handling. A much more promising way of representative radon on-site detection is in situ extraction of radon directly from the water body of concern without any water sampling involved. This approach is in particular advantageous if large water bodies with low radon concentrations, such as lakes or rivers, are subject of investigation. The paper discusses results of laboratory and field experiments in which a newly developed portable "radon extraction module" was used. The module works on the principle of liquid-gas membrane extraction and mainly consists of a coiled-up hydrophobic membrane tubing, which shows a very high permeability with regard to radon. All experimental set-ups and experimental results discussed in the paper are supported by theoretical considerations.
ID 1429
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=1429
Schubert, M., Schmidt, A., Paschke, A., Lopez, A., Balcázar, M. (2008):
In situ determination of radon in surface water bodies by means of a hydrophobic membrane tubing
Radiat. Meas. 43 (1), 111 - 120