Radiological analysis of the suitability of Erongo granite for building material
This study measured the natural radioactivity of 226 Ra, 232 Th and 40 K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibriu...
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| creator | Onjefu, Sylvanus Ameh Iyambo, Mpingana Laimi Abah, James Mwiya, Sindila |
| description | This study measured the natural radioactivity of
226
Ra,
232
Th and
40
K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibrium. The average activity concentrations of
226
Ra,
232
Th and
40
K were 39.22 ± 3.79Bqkg
−1
, 35.76 ± 17.18Bqkg
−1
and 1601.45 ± 212.18 Bqkg
−1
respectively. The average activity concentrations of
226
Ra,
232
Th and
40
K were used to estimate the average hazard indices and the results obtained further showed that radium equivalent activity, absorbed dose rate in air, external hazard indices (in and out), internal hazard index, external radioactivity index, internal radioactivity index, activity utilization index, annual effective dose equivalent (in and out door), exposure rate, and excess lifetime cancer risk were 213.85 Bqkg
−1
, 105.95 nGyh
−1
, 107.11 nGyh
−1
, 0.58, 0.29, 0.68, 0.82, 0.20, 1.77, 0.52 mSv.y
−1
, 0.13 mSv.y
−1
, 462.03 µRh
−1
and 1.82 respectively. The results obtained revealed that the radiological hazard indices were lower than their respective acceptable critical values. However, the average value of effective dose equivalent (indoor) obtained was higher than the acceptable limit. |
| doi_str_mv | 10.1080/19475705.2020.1863270 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2612562657</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><doaj_id>oai_doaj_org_article_f8ef66924e5f4bceb839b670cb1a03e8</doaj_id><sourcerecordid>2612562657</sourcerecordid><originalsourceid>FETCH-LOGICAL-c451t-432988d2fe5cee6e4efc44e9897b56106a4d63388cb1898a2412c0e9ca38ae773</originalsourceid><addsrcrecordid>eNp9kVtrGzEQhZfSQoPjn1BY6LNT3aV9awm5GAIJpX0Ws9rRVkZepZJM8L_Pbp36MfMyw2HmGzinab5QckWJId9oJ7TURF4xwmbJKM40-dBcLPpGaso_nmciPzfrUnZkLs6MJuKiefoJQ0gxjcFBbGGCeCyhtMm39Q-25RAq9CGGelykm5ymMbVjhilUbH3KbX8IcQjT2O6hYg4QL5tPHmLB9VtfNb9vb35d328eHu-21z8eNk5IWjeCs86YgXmUDlGhQO-EwM50upeKEgViUJwb43pqOgNMUOYIdg64AdSar5rtiTsk2NnnHPaQjzZBsP-ElEcLuQYX0XqDXqmOCZRe9A57w7teaTKjgXA0M-vrifWc098Dlmp36ZBnL4plijKpmJLLR3nacjmVktGfv1Jilyzs_yzskoV9y2K--366C9Ps2B5eUo6DrXCMKfvZSheK5e8jXgEqDY_M</addsrcrecordid><sourcetype>Open Website</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2612562657</pqid></control><display><type>article</type><title>Radiological analysis of the suitability of Erongo granite for building material</title><source>Taylor & Francis Open Access</source><source>DOAJ Directory of Open Access Journals</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><creator>Onjefu, Sylvanus Ameh ; Iyambo, Mpingana Laimi ; Abah, James ; Mwiya, Sindila</creator><creatorcontrib>Onjefu, Sylvanus Ameh ; Iyambo, Mpingana Laimi ; Abah, James ; Mwiya, Sindila</creatorcontrib><description>This study measured the natural radioactivity of
226
Ra,
232
Th and
40
K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibrium. The average activity concentrations of
226
Ra,
232
Th and
40
K were 39.22 ± 3.79Bqkg
−1
, 35.76 ± 17.18Bqkg
−1
and 1601.45 ± 212.18 Bqkg
−1
respectively. The average activity concentrations of
226
Ra,
232
Th and
40
K were used to estimate the average hazard indices and the results obtained further showed that radium equivalent activity, absorbed dose rate in air, external hazard indices (in and out), internal hazard index, external radioactivity index, internal radioactivity index, activity utilization index, annual effective dose equivalent (in and out door), exposure rate, and excess lifetime cancer risk were 213.85 Bqkg
−1
, 105.95 nGyh
−1
, 107.11 nGyh
−1
, 0.58, 0.29, 0.68, 0.82, 0.20, 1.77, 0.52 mSv.y
−1
, 0.13 mSv.y
−1
, 462.03 µRh
−1
and 1.82 respectively. The results obtained revealed that the radiological hazard indices were lower than their respective acceptable critical values. However, the average value of effective dose equivalent (indoor) obtained was higher than the acceptable limit.</description><identifier>ISSN: 1947-5705</identifier><identifier>EISSN: 1947-5713</identifier><identifier>DOI: 10.1080/19475705.2020.1863270</identifier><language>eng</language><publisher>Abingdon: Taylor & Francis</publisher><subject>building materials ; Dosage ; Equivalence ; Erongo region ; excess lifetime cancer risk ; Germanium ; Granite ; Health risks ; Mountains ; Natural radioactivity ; radiation hazards ; Radioactivity ; Radium ; Radium 226 ; Radium isotopes ; Radium radioisotopes</subject><ispartof>Geomatics, natural hazards and risk, 2021-01, Vol.12 (1), p.181-197</ispartof><rights>2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. 2021</rights><rights>2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c451t-432988d2fe5cee6e4efc44e9897b56106a4d63388cb1898a2412c0e9ca38ae773</citedby><cites>FETCH-LOGICAL-c451t-432988d2fe5cee6e4efc44e9897b56106a4d63388cb1898a2412c0e9ca38ae773</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.tandfonline.com/doi/pdf/10.1080/19475705.2020.1863270$$EPDF$$P50$$Ginformaworld$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.tandfonline.com/doi/full/10.1080/19475705.2020.1863270$$EHTML$$P50$$Ginformaworld$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,860,2096,27479,27901,27902,59116,59117</link.rule.ids></links><search><creatorcontrib>Onjefu, Sylvanus Ameh</creatorcontrib><creatorcontrib>Iyambo, Mpingana Laimi</creatorcontrib><creatorcontrib>Abah, James</creatorcontrib><creatorcontrib>Mwiya, Sindila</creatorcontrib><title>Radiological analysis of the suitability of Erongo granite for building material</title><title>Geomatics, natural hazards and risk</title><description>This study measured the natural radioactivity of
226
Ra,
232
Th and
40
K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibrium. The average activity concentrations of
226
Ra,
232
Th and
40
K were 39.22 ± 3.79Bqkg
−1
, 35.76 ± 17.18Bqkg
−1
and 1601.45 ± 212.18 Bqkg
−1
respectively. The average activity concentrations of
226
Ra,
232
Th and
40
K were used to estimate the average hazard indices and the results obtained further showed that radium equivalent activity, absorbed dose rate in air, external hazard indices (in and out), internal hazard index, external radioactivity index, internal radioactivity index, activity utilization index, annual effective dose equivalent (in and out door), exposure rate, and excess lifetime cancer risk were 213.85 Bqkg
−1
, 105.95 nGyh
−1
, 107.11 nGyh
−1
, 0.58, 0.29, 0.68, 0.82, 0.20, 1.77, 0.52 mSv.y
−1
, 0.13 mSv.y
−1
, 462.03 µRh
−1
and 1.82 respectively. The results obtained revealed that the radiological hazard indices were lower than their respective acceptable critical values. However, the average value of effective dose equivalent (indoor) obtained was higher than the acceptable limit.</description><subject>building materials</subject><subject>Dosage</subject><subject>Equivalence</subject><subject>Erongo region</subject><subject>excess lifetime cancer risk</subject><subject>Germanium</subject><subject>Granite</subject><subject>Health risks</subject><subject>Mountains</subject><subject>Natural radioactivity</subject><subject>radiation hazards</subject><subject>Radioactivity</subject><subject>Radium</subject><subject>Radium 226</subject><subject>Radium isotopes</subject><subject>Radium radioisotopes</subject><issn>1947-5705</issn><issn>1947-5713</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>0YH</sourceid><sourceid>DOA</sourceid><recordid>eNp9kVtrGzEQhZfSQoPjn1BY6LNT3aV9awm5GAIJpX0Ws9rRVkZepZJM8L_Pbp36MfMyw2HmGzinab5QckWJId9oJ7TURF4xwmbJKM40-dBcLPpGaso_nmciPzfrUnZkLs6MJuKiefoJQ0gxjcFBbGGCeCyhtMm39Q-25RAq9CGGelykm5ymMbVjhilUbH3KbX8IcQjT2O6hYg4QL5tPHmLB9VtfNb9vb35d328eHu-21z8eNk5IWjeCs86YgXmUDlGhQO-EwM50upeKEgViUJwb43pqOgNMUOYIdg64AdSar5rtiTsk2NnnHPaQjzZBsP-ElEcLuQYX0XqDXqmOCZRe9A57w7teaTKjgXA0M-vrifWc098Dlmp36ZBnL4plijKpmJLLR3nacjmVktGfv1Jilyzs_yzskoV9y2K--366C9Ps2B5eUo6DrXCMKfvZSheK5e8jXgEqDY_M</recordid><startdate>20210101</startdate><enddate>20210101</enddate><creator>Onjefu, Sylvanus Ameh</creator><creator>Iyambo, Mpingana Laimi</creator><creator>Abah, James</creator><creator>Mwiya, Sindila</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><general>Taylor & Francis Group</general><scope>0YH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>7TN</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>H97</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>SOI</scope><scope>DOA</scope></search><sort><creationdate>20210101</creationdate><title>Radiological analysis of the suitability of Erongo granite for building material</title><author>Onjefu, Sylvanus Ameh ; Iyambo, Mpingana Laimi ; Abah, James ; Mwiya, Sindila</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c451t-432988d2fe5cee6e4efc44e9897b56106a4d63388cb1898a2412c0e9ca38ae773</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>building materials</topic><topic>Dosage</topic><topic>Equivalence</topic><topic>Erongo region</topic><topic>excess lifetime cancer risk</topic><topic>Germanium</topic><topic>Granite</topic><topic>Health risks</topic><topic>Mountains</topic><topic>Natural radioactivity</topic><topic>radiation hazards</topic><topic>Radioactivity</topic><topic>Radium</topic><topic>Radium 226</topic><topic>Radium isotopes</topic><topic>Radium radioisotopes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Onjefu, Sylvanus Ameh</creatorcontrib><creatorcontrib>Iyambo, Mpingana Laimi</creatorcontrib><creatorcontrib>Abah, James</creatorcontrib><creatorcontrib>Mwiya, Sindila</creatorcontrib><collection>Taylor & Francis Open Access</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Geomatics, natural hazards and risk</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Onjefu, Sylvanus Ameh</au><au>Iyambo, Mpingana Laimi</au><au>Abah, James</au><au>Mwiya, Sindila</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Radiological analysis of the suitability of Erongo granite for building material</atitle><jtitle>Geomatics, natural hazards and risk</jtitle><date>2021-01-01</date><risdate>2021</risdate><volume>12</volume><issue>1</issue><spage>181</spage><epage>197</epage><pages>181-197</pages><issn>1947-5705</issn><eissn>1947-5713</eissn><abstract>This study measured the natural radioactivity of
226
Ra,
232
Th and
40
K in 20 granite samples obtained from the Erongo Mountain Belt and Usakos Dome of the Erongo region, Namibia. All the samples were analysed using high purity germanium (HPGe) detector after 30-days to allow for secular equilibrium. The average activity concentrations of
226
Ra,
232
Th and
40
K were 39.22 ± 3.79Bqkg
−1
, 35.76 ± 17.18Bqkg
−1
and 1601.45 ± 212.18 Bqkg
−1
respectively. The average activity concentrations of
226
Ra,
232
Th and
40
K were used to estimate the average hazard indices and the results obtained further showed that radium equivalent activity, absorbed dose rate in air, external hazard indices (in and out), internal hazard index, external radioactivity index, internal radioactivity index, activity utilization index, annual effective dose equivalent (in and out door), exposure rate, and excess lifetime cancer risk were 213.85 Bqkg
−1
, 105.95 nGyh
−1
, 107.11 nGyh
−1
, 0.58, 0.29, 0.68, 0.82, 0.20, 1.77, 0.52 mSv.y
−1
, 0.13 mSv.y
−1
, 462.03 µRh
−1
and 1.82 respectively. The results obtained revealed that the radiological hazard indices were lower than their respective acceptable critical values. However, the average value of effective dose equivalent (indoor) obtained was higher than the acceptable limit.</abstract><cop>Abingdon</cop><pub>Taylor & Francis</pub><doi>10.1080/19475705.2020.1863270</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1947-5705 |
| ispartof | Geomatics, natural hazards and risk, 2021-01, Vol.12 (1), p.181-197 |
| issn | 1947-5705 1947-5713 |
| language | eng |
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| source | Taylor & Francis Open Access; DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | building materials Dosage Equivalence Erongo region excess lifetime cancer risk Germanium Granite Health risks Mountains Natural radioactivity radiation hazards Radioactivity Radium Radium 226 Radium isotopes Radium radioisotopes |
| title | Radiological analysis of the suitability of Erongo granite for building material |
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