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Article: Radon release from building materials in Hong Kong

TitleRadon release from building materials in Hong Kong
Authors
Keywords222Rn, indoor
232Th
40K
exhalation rate
Issue Date1994
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.health-physics.com/
Citation
Health Physics, 1994, v. 67 n. 4, p. 378-384 How to Cite?
AbstractIndoor 222Rn in high-rise buildings originates inside the building materials, then diffuses gradually through the intergranular spaces of the material into the room atmosphere. Therefore, the radionuclide contents and the physical properties of the building materials are important for indoor 222Rn levels in Hong Kong. In this paper, the radionuclide contents of typical building materials used locally were determined by γ spectrometry, and the results indicate that the average 226Ra, 232Th, and 40K contents in Hong Kong concrete are the highest known in the world. Physical properties, such as the emanation coefficients and 222Rn diffusion coefficients, were measured in these materials and they are not much different from those in other countries. The effect of surface coatings on 222Rn exhalation rate was studied and the observed reduction was from 2- 68%. The 222Rn exhalation rate was found to increase steadily with temperature up to 50°C; at 50°C, the 222Rn exhalation rate can be as high as four times the rate at 20°C.
Persistent Identifierhttp://hdl.handle.net/10722/90450
ISSN
2015 Impact Factor: 1.193
2015 SCImago Journal Rankings: 0.683
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTso, MYWen_HK
dc.contributor.authorNg, CYen_HK
dc.contributor.authorLeung, JKCen_HK
dc.date.accessioned2010-09-06T10:10:46Z-
dc.date.available2010-09-06T10:10:46Z-
dc.date.issued1994en_HK
dc.identifier.citationHealth Physics, 1994, v. 67 n. 4, p. 378-384en_HK
dc.identifier.issn0017-9078en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90450-
dc.description.abstractIndoor 222Rn in high-rise buildings originates inside the building materials, then diffuses gradually through the intergranular spaces of the material into the room atmosphere. Therefore, the radionuclide contents and the physical properties of the building materials are important for indoor 222Rn levels in Hong Kong. In this paper, the radionuclide contents of typical building materials used locally were determined by γ spectrometry, and the results indicate that the average 226Ra, 232Th, and 40K contents in Hong Kong concrete are the highest known in the world. Physical properties, such as the emanation coefficients and 222Rn diffusion coefficients, were measured in these materials and they are not much different from those in other countries. The effect of surface coatings on 222Rn exhalation rate was studied and the observed reduction was from 2- 68%. The 222Rn exhalation rate was found to increase steadily with temperature up to 50°C; at 50°C, the 222Rn exhalation rate can be as high as four times the rate at 20°C.en_HK
dc.languageengen_HK
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.health-physics.com/en_HK
dc.relation.ispartofHealth Physicsen_HK
dc.rightsHealth Physics. Copyright © Lippincott Williams & Wilkins.en_HK
dc.subject222Rn, indooren_HK
dc.subject232Then_HK
dc.subject40Ken_HK
dc.subjectexhalation rateen_HK
dc.titleRadon release from building materials in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0017-9078&volume=67&issue=4&spage=378&epage=384&date=1994&atitle=Radon+release+from+building+materials+in+Hong+Kongen_HK
dc.identifier.emailLeung, JKC: jkcleung@hku.hken_HK
dc.identifier.authorityLeung, JKC=rp00732en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid8083050-
dc.identifier.scopuseid_2-s2.0-0028086101en_HK
dc.identifier.hkuros4144en_HK
dc.identifier.volume67en_HK
dc.identifier.issue4en_HK
dc.identifier.spage378en_HK
dc.identifier.epage384en_HK
dc.identifier.isiWOS:A1994PG34600009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTso, MYW=7102052118en_HK
dc.identifier.scopusauthoridNg, CY=35120726500en_HK
dc.identifier.scopusauthoridLeung, JKC=24080627200en_HK

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