Measurement of radon potential from soil using a special method of sampling
Soil radon gas and/or its exhalation rate are used as indicators for some applications, such as uranium exploration, indoor radon concentration, seismic activity, location of subsurface faults, etc., and also in the studies where the main interest is the field verification of radon transport models. This work proposes a versatile method for the soil radon sampling using a special manner of pumping. The soil gas is passed through a columnof charcoal by using passive pumping. A plastic bottle filled with water is coupled to an activated charcoal column and the flow of water through an adjustable hole made at the bottom of bottle assures a controlled gas flow from the soil. The results obtained for the activity of activated charcoal are in the range of 20-40 kBq/m3, for a depth of approximately 0.8 m. The results obtained by this method were confirmed by simultaneous measurements using LUK 3C device for soil radon measurements. Possible applications for the estimation of radon soil potential are discussed.
Bibliogr. 18 poz.
- Cosma, C., D. Ristoiu, O. Cozar, V. Znamirovschi, L. Daraban, S. Ramboiu, and I. Chereji (1996a), Studies on the occurrence of radon in selected sites of Romania, Environ. Int. 22, 61-65.
- Cosma, C., D. Ristoiu, A. Poffijn, and G. Meesen (1996b), Radon in various environment al samples in the Herculane Spa, Cerna Valley, Romania, Environ. Int. 22, 383-388.
- Cosma, C., M. Moldovan, T. Dicu, and T. Kovács (2008), Radon in water from Transylvania (Romania), Radiat. Meas. 43, 8, 1423-1428.
- Darby, S., E. Whitley, P. Silcocks, B. Thakrar, M. Green, P. Lomas, J. Miles, G. Reeves, T. Fearn, and R. Doll (1998), Risk of lung cancer associated with residential radon exposure in south-west England: a case-control study, Br. J. Cancer 78, 3, 394-408.
- Elmaghraby, E.K., and Y.A. Lotfy (2009), Differentiation between earthquake radon anomalies and those arising from nuclear activities, Appl. Radiat. Isotopes 67, 1, 208-211.
- Gorjánácz, Z., A. Várhegyi, T. Kovács, and J. Somlai (2006), Population dose in the vicinity of closed Hungarian uranium mine, Radiat. Prot. Dosim. 118, 4, 448-452.
- Hámori, K., E. Tóth, A. Losonci, and M. Minda (2006), Some remarks on the indor radon distribution in a country, Appl. Radiat. Isotopes 64, 8, 859-863.
- Igarashi, G., S. Saeki, N. Takahata, K. Sumikawa, S. Tasaka, Y. Sasaki, M. Takahashi, and Y. Sano (1995), Ground-water radon anomaly before the Kobe earthquake in Japan, Science 269, 5220, 60-61.
- Killip, I.R. (2005), Radon hazard and risk in Sussex, England and the factors affecting radon levels in dwellings in chalk terrain, Radiat. Prot. Dosim. 113, 1, 99-107.
- Moldovan, M., C. Cosma, I. Encian, and T. Dicu (2009), Radium-226 concentration in Romanian bottled mineral waters, J. Radioanal. Nucl. Chem. 279, 2, 487-491.
- Nazaroff, W.W., B.A. Moed, and R.G. Sextro (1988), Soil as a source of indoor radon: Generation, migration and entry. In: W.W. Nazaroff and A.V. Nero (eds.), Radon and its Decay Products in Indoor Air, John Wiley and Sons Inc., New York, 55-112.
- Neznal, M., and M. Neznal (2005), Permeability as an important parameter for radon risk classification of foundation soils, Ann. Geophys. 48, 1, 175-180.
- Neznal, M., M. Neznal, M. Matolín, I. Barnet, and J. Miksova (2004), The New method for assessing the radon risk of building sites, Czech. Geol. Survey, Special Papers 47.
- NRPB (1993), National Radiation Maps of Western Europe, National Radiological Protection Board, Chilton, Didcot, Oxon.
- Plch, J. (1997), Manual for Operating LUK 3C Device, Jiri Plch, M. Eng. SMM, Prague.
- Sainz, C., A. Dinu, T. Dicu, K. Szacsvai, C. Cosma, and L.S. Quindós (2009), Comparative risk assessment of residential radon exposures in two radon-prone areas, Ştei (Romania) and Torrelodones (Spain), Sci. Total Environ. 407, 15, 4452-4460.
- Stranden, E., and A.K. Kolstad (1985), Radon exhalation from the ground; Method of measurements and preliminary results, Sci. Total Environ. 45, 165-171.
- Tanner, A.B. (1980), Radon migration in the ground, a supplementary review. In: T.F. Gesell and W.M. Lowder (eds.), Natural Radiation Environment III, National Techn. Inform. Service, CONF-780422, Springfield, VA, 5-56.