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Article: Radioactivity in zircon and building tiles

TitleRadioactivity in zircon and building tiles
Authors
KeywordsDose
Dose assessment
Health effects
Radioactivity
Issue Date1997
PublisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.health-physics.com/
Citation
Health Physics: the radiation safety journal, 1997, v. 73 n. 2, p. 369-372 How to Cite?
AbstractZircon (ZrSiO4) is commonly used in the manufacture of glazed tiles. In this study we found high concentrations of the radionuclides 226Ra, 232Th, 40K in zircon sand. The average radium equivalent (A(Ra) + 1.26 A(Th) + 0.086 A(k) in zircon sand is 17,500 Bq kg-1, which is 106 times as much as that in ordinary building materials. The external radiation (γ +β) dose rates in air at 5 cm from the surface of piles of zircon sand sacks range from 1.1 to 4.9 x 10-2 mGy h-1 with an average of 2.1 x 10-2 mGy h-2. Although no elevated γ-ray radiation or radon exhalation rate was detected in rooms decorated with glazed tiles, which is characteristic of combined α,β and γ emitting thin materials, the average γ-ray radiation dose rate at the surface of the tile stacks in shops is 1.5 times as much as the indoor background level. The average area density of total β emitting radionuclides in glazed floor tiles and glazed wall tiles is 0.30 Bq cm-2 and 0.28 Bq cm-2, respectively. It was estimated that the average β dose rates in tissue at a depth 7 mg cm-2 with a distance 20-100 cm from the floor tiles were 3.2 to 0.9 x 10-7 Gy h-1. The study indicates that the β-rays from glazed tiles might be one of the main factors leading to an increase in ionizing radiation received by the general public. Workers in glazed tile manufacturing factories and in tile shops or stores may be exposed to elevated levels of both β-rays and γ-rays from zircon sand or glazed tile stacks. No elevated radiation from unglazed tiles was detected.
Persistent Identifierhttp://hdl.handle.net/10722/240630
ISSN
2023 Impact Factor: 1.0
2023 SCImago Journal Rankings: 0.464

 

DC FieldValueLanguage
dc.contributor.authorDeng, W-
dc.date.accessioned2017-05-09T01:55:58Z-
dc.date.available2017-05-09T01:55:58Z-
dc.date.issued1997-
dc.identifier.citationHealth Physics: the radiation safety journal, 1997, v. 73 n. 2, p. 369-372-
dc.identifier.issn0017-9078-
dc.identifier.urihttp://hdl.handle.net/10722/240630-
dc.description.abstractZircon (ZrSiO4) is commonly used in the manufacture of glazed tiles. In this study we found high concentrations of the radionuclides 226Ra, 232Th, 40K in zircon sand. The average radium equivalent (A(Ra) + 1.26 A(Th) + 0.086 A(k) in zircon sand is 17,500 Bq kg-1, which is 106 times as much as that in ordinary building materials. The external radiation (γ +β) dose rates in air at 5 cm from the surface of piles of zircon sand sacks range from 1.1 to 4.9 x 10-2 mGy h-1 with an average of 2.1 x 10-2 mGy h-2. Although no elevated γ-ray radiation or radon exhalation rate was detected in rooms decorated with glazed tiles, which is characteristic of combined α,β and γ emitting thin materials, the average γ-ray radiation dose rate at the surface of the tile stacks in shops is 1.5 times as much as the indoor background level. The average area density of total β emitting radionuclides in glazed floor tiles and glazed wall tiles is 0.30 Bq cm-2 and 0.28 Bq cm-2, respectively. It was estimated that the average β dose rates in tissue at a depth 7 mg cm-2 with a distance 20-100 cm from the floor tiles were 3.2 to 0.9 x 10-7 Gy h-1. The study indicates that the β-rays from glazed tiles might be one of the main factors leading to an increase in ionizing radiation received by the general public. Workers in glazed tile manufacturing factories and in tile shops or stores may be exposed to elevated levels of both β-rays and γ-rays from zircon sand or glazed tile stacks. No elevated radiation from unglazed tiles was detected.-
dc.languageeng-
dc.publisherLippincott Williams & Wilkins. The Journal's web site is located at http://www.health-physics.com/-
dc.relation.ispartofHealth Physics: the radiation safety journal-
dc.rightsThis is a non-final version of an article published in final form in Health Physics: the radiation safety journal, 1997, v. 73 n. 2, p. 369-372-
dc.subjectDose-
dc.subjectDose assessment-
dc.subjectHealth effects-
dc.subjectRadioactivity-
dc.titleRadioactivity in zircon and building tiles-
dc.typeArticle-
dc.identifier.emailDeng, W: wdeng@hkucc.hku.hk-
dc.identifier.authorityDeng, W=rp01640-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid9228172-
dc.identifier.scopuseid_2-s2.0-0030795350-
dc.identifier.volume73-
dc.identifier.issue2-
dc.identifier.spage369-
dc.identifier.epage372-
dc.publisher.placeUnited States-
dc.identifier.issnl0017-9078-

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