Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil

High levels of environmental radioactivity are caused by the composition of minerals in the earth's crust and the impact of prospection and utilization of natural sources, mainly due to the presence of 40K and radionuclides of 238U and 232Th series. Radium equivalent activity (RaEq) was calcula...

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Autores principales:	José Araújo dos Santos Júnior, Eduardo Eudes Nóbrega de Araújo, Zahily Herrero Fernández, Romilton dos Santos Amaral, Josineide Marques do Nascimento Santos, Marvic Ortueta Milán
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Construction Health Potteries Radioactivity Spectrometry Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/9b2f9c06ce6e4286a549f40a8641a303
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spelling	oai:doaj.org-article:9b2f9c06ce6e4286a549f40a8641a3032021-12-02T05:04:12ZMeasurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil2666-765710.1016/j.envadv.2021.100121https://doaj.org/article/9b2f9c06ce6e4286a549f40a8641a3032021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666765721000922https://doaj.org/toc/2666-7657High levels of environmental radioactivity are caused by the composition of minerals in the earth's crust and the impact of prospection and utilization of natural sources, mainly due to the presence of 40K and radionuclides of 238U and 232Th series. Radium equivalent activity (RaEq) was calculated to assess the risk associated with primordial radionuclides in areas with clay extraction and production of bricks and tiles for civil construction. Twenty-eight clay samples, collected from potteries in Paraíba and Rio Grande do Norte states, Brazil, were analyzed using a non-destructive gamma-spectrometry method. Results showed radium equivalent activity in the range of 85 to 748 (mean value of 334) Bq kg−1. Around 29% of the samples presented RaEq higher than the limit of 370 Bq kg−1, a value established for specific applications of the products, whose raw material must be assessed in the source of extraction to comply with the radioecological protection principles. The qualitative characterization confirmed that all the radionuclides found in samples are of natural origin, with elevated values for some clay deposits, leading to suggestions to guarantee the safety of using the raw material in civil construction.José Araújo dos Santos JúniorEduardo Eudes Nóbrega de AraújoZahily Herrero FernándezRomilton dos Santos AmaralJosineide Marques do Nascimento SantosMarvic Ortueta MilánElsevierarticleConstructionHealthPotteriesRadioactivitySpectrometryEnvironmental sciencesGE1-350ENEnvironmental Advances, Vol 6, Iss , Pp 100121- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Construction Health Potteries Radioactivity Spectrometry Environmental sciences GE1-350
spellingShingle	Construction Health Potteries Radioactivity Spectrometry Environmental sciences GE1-350 José Araújo dos Santos Júnior Eduardo Eudes Nóbrega de Araújo Zahily Herrero Fernández Romilton dos Santos Amaral Josineide Marques do Nascimento Santos Marvic Ortueta Milán Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
description	High levels of environmental radioactivity are caused by the composition of minerals in the earth's crust and the impact of prospection and utilization of natural sources, mainly due to the presence of 40K and radionuclides of 238U and 232Th series. Radium equivalent activity (RaEq) was calculated to assess the risk associated with primordial radionuclides in areas with clay extraction and production of bricks and tiles for civil construction. Twenty-eight clay samples, collected from potteries in Paraíba and Rio Grande do Norte states, Brazil, were analyzed using a non-destructive gamma-spectrometry method. Results showed radium equivalent activity in the range of 85 to 748 (mean value of 334) Bq kg−1. Around 29% of the samples presented RaEq higher than the limit of 370 Bq kg−1, a value established for specific applications of the products, whose raw material must be assessed in the source of extraction to comply with the radioecological protection principles. The qualitative characterization confirmed that all the radionuclides found in samples are of natural origin, with elevated values for some clay deposits, leading to suggestions to guarantee the safety of using the raw material in civil construction.
format	article
author	José Araújo dos Santos Júnior Eduardo Eudes Nóbrega de Araújo Zahily Herrero Fernández Romilton dos Santos Amaral Josineide Marques do Nascimento Santos Marvic Ortueta Milán
author_facet	José Araújo dos Santos Júnior Eduardo Eudes Nóbrega de Araújo Zahily Herrero Fernández Romilton dos Santos Amaral Josineide Marques do Nascimento Santos Marvic Ortueta Milán
author_sort	José Araújo dos Santos Júnior
title	Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
title_short	Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
title_full	Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
title_fullStr	Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
title_full_unstemmed	Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil
title_sort	measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in paraíba and rio grande do norte – brazil
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9b2f9c06ce6e4286a549f40a8641a303
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Measurement of natural radioactivity and radium equivalent activity for pottery making clay samples in Paraíba and Rio Grande do Norte – Brazil

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