Indoor activity size distribution of the short-lived radon progeny / Yuness M., Mohamed A., Nazmy H., Moustafa M., Abd El-hady M. // Stochastic Environmental Research and Risk Assessment. - 2016. - V. 30, l. 1. - P. 167-174.

ISSN:
14363240
Type:
Article
Abstract:
Activity size distribution of the short-lived radon progeny in indoor air was measured continuously over several weeks. Two different measurement techniques were used: a direct measurement with a low-pressure Berner cascade impactor for attached fraction of 214Pb and 214Bi (≥100 nm) and an indirect determination based on measurement with a wire screen diffusion battery (unattached fraction 0.5–5 nm, 218Po, 214Pb). In parallel, the meteorological parameters like temperature, humidity were registered. Measured activity size distribution of radon progeny can be approximated by a sum of three log-normal distributions modes (nucleation, accumulation and coarse). The greatest activity fraction was adsorbed on aerosol particles in the accumulation size range (100–1000 nm) with activity median aerodynamic diameters (AMADa) and geometric standard deviations (GSDa) values of 250–500 nm, and 1.5–3.5, respectively. The influence of the weather conditions on the activity of the accumulation particles was not significant. In contrast to the results of measurements a small but significant fraction of the radon progeny (average value 5 %) was attached to coarse particles (>1000 nm). This fraction varied between 0 and 10 %. On the other hand, although the amount of unattached activities not more 10 % of the total activity, but is considered to yield about 50 % of the total radiation dose. The mean thermodynamic equivalent diameters of 218Po and 214Pb were determined to be 1.28 and 1.30 nm with relative mean geometric standard deviations of 1.30 and 1.24, respectively. Based on the obtained results of radon progeny size distributions (attached and unattached), the total deposition fractions of the human lung were evaluated by using a lung deposition model. © 2015, Springer-Verlag Berlin Heidelberg.
Author keywords:
Aerosol activity size distribution; Aerosols; Cascade impactor; Radon progeny; Radon progeny deposition
Index keywords:
Aerosols; Biological organs; Deposition; Lead; Meteorological instruments; Normal distribution; Size distribution; Statistics; Activity size distributions; Cascade impactors; Geometric standard deviat
DOI:
10.1007/s00477-015-1057-x
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https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958176105&doi=10.1007%2fs00477-015-1057-x&partnerID=40&md5=f702c3b60954c8ab60de7aad4be7946f
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Affiliations Physics Department, El-Minia University, El Minya, Egypt; Ural Federal University, Mira St. 19, Yekaterinburg, Russian Federation
Author Keywords Aerosol activity size distribution; Aerosols; Cascade impactor; Radon progeny; Radon progeny deposition
References Ahmed, A.A., (1979) Untersuchungen zur Aerosoldeposition an Oberflachen, , PhD Thesis: University Giessen; Becker, K.H., Reineking, A., Scheibel, H.G., Porstendorfer, J., Radon daughter activity size distributions (1984) Radiat Prot Dosim, 7, pp. 147-150; Butterweck-Dempewolf, G., Shuler, C., Vezzu, G., Size distribution of the unattached fraction of radon progeny (1997) Proceedings of European conference on protection against radon at home and at work, Praha, 2–6 June, 1997, pp. 28-32; Cheng, Y.S., Su, Y.F., Newten, G.J., Yeh, H.C., Use of a graded diffusion battery in measuring the activity size distributions of thoron progeny (1992) J Aerosol Sci, 23, pp. 361-366; Cheng, Y.S., Chen, T.R., Yeh, H.C., Bigu, J., Holub, R., Tu, K., Knutsond, E.O., Falk, R., Intercomparison of activity size distribution of thoron progeny and a mixture of radon and thoron progeny (2000) J Environ Radioact, 51, pp. 59-78; George, A.C., Knutson, E.O., Particle size of unattached radon progeny in filtered room air (1994) Radiat Prot Dosim, 56, pp. 119-121; Georges, M., (2000) Risk assessment of exposure to radon decay products. Final Report, , Commission of the European Communities (CEC), Brussels; Hinds, W.C., (1999) Aerosol technology: properties, behavior, and measurement of airborne particles, , Wiley, New York; Hopke, P.K., Ramamurthi, M., Li, C.S., Measurements of the size distribution of radon progeny in indoor air (1990) Aerosols: science, industry, health and environment, pp. 842-847. , Masuda S, Takahi K, (eds), II, Oxford University Press, Oxford; Huet, C., Tymen, G., Boulaud, D., Size distribution, equilibrium ratio and unattached fraction of radon decay products under typical indoor domestic conditions (2001) Sci Total Environ, 272, pp. 97-103; (1994) Human respiratory tract model for radiological protection. ICRP Publication 66, , Pergamon Press, Oxford; Kranrod, C., Tokonami, S., Ishikawa, T., Sorimachi, A., Janik, M., Shingaki, R., Furukawa, M., Chankow, N., Mitigation of the effective dose of radon decay products through the use of an air cleaner in a dwelling in Okinawa, Japan (2009) Appl Radiat Isot, 67, pp. 1127-1132; Mishra, R., Mayya, Y.S., Kushwaha, H.S., Measurement of 220Rn/222Rn progeny deposition velocities on surfaces and their comparison with theoretical models (2009) Aerosol Sci, 40, pp. 1-15; Mohammed, A., Activity size distribution of short-lived radon progeny in indoor air (1999) Radiat Prot Dosim, 86 (2), pp. 139-143; Mohammed, A., Abd El-hady, M., Moustafa, M., Yuness, M., Deposition pattern of inhaled radon progeny size distribution in human lung (2014) J Radiat Res Appl Sci, 7, pp. 333-337; (1993) LUDEP 1.0 personal computer program for calculating internal doses using the ICRP respiratory tract model, , Pacific Northwest Laboratory, Richland; Porstendörfer, J., Behaviour of radon daughter products in indoor air (1984) Radiat Prot Dosim, 7, pp. 107-114; Porstendörfer, J., Reineking, A., Radon characteristics in air and dose conversion factor (1999) Health Phys, 76 (3), pp. 300-305; Reineking, A., Scheibel, H.G., Hussin, A., Becker, K.H., Porstendörfer, J., Measurements of stage efficiency functions including interstage losses for sierra and berner impactor and evaluation of data by modified simplex method (1984) J Aerosol Sci, 15, pp. 376-380; Reineking, A., Becker, K.H., Porstendörfer, J., Measurements of the activity size distributions of the short lived radon daughters in the indoor and outdoor environment (1988) Radiat Prot Dosim, 24, pp. 245-250; Solomon, S.B., Ren, T., Counting efficiencies for alpha particles emitted for wire screens (1992) Aerosol Sci Technol, 17, pp. 69-83; Strong, J.C., The size of attached and unattached radon daughters in room air (1988) J Aerosol Sci, 19, pp. 1327-1330; (2006) Effects of ionizing radiation. UNSCEAR Report to the General Assembly, with Scientific Annexes, , United Nations, New York; (2008) Sources and effects of ionizing radiation. UNSCEAR Report to the General Assembly, with Scientific Annexes, , United Nations, New York; Vaupotič, J., Kobal, I., Effective doses in schools based on nano-size radon progeny aerosols (2006) Atmos Environ, 40, pp. 749-750; (2009) WHO handbook on indoor radon: a public health perspective, , WHO, Geneva; Yamasaki, K., Oki, Y., Yamada, Y., Tokonami, S., Iida, T., Optimization of measuring methods on size distribution of naturally occurring radioactive aerosols (2005) Int Congr Ser, 1276, pp. 297-298
Correspondence Address Yuness, M.; Ural Federal University, Mira St. 19, Russian Federation; email: mostafa_85@mail.ru
Publisher Springer New York LLC
Language of Original Document English
Abbreviated Source Title Stoch. Environ. Res. Risk Assess.
Source Scopus