High radon exposure in a Brazilian underground coal mine

Veiga, Lene H.S.; Melo, Vicente P; Koifman, Sérgio; Amaral, E.C.S.

doi:10.1088/0952-4746/24/3/008

Cited by 34 publications

(17 citation statements)

References 11 publications

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“…Although the concentrations of NORM in different types of coal vary, they are generally about the same as in other rocks of the Earth's crust (IAEA 2003). Miners of coal industry are normally subjected to elevated occupational exposures to radon, and an increased mortality rate associated with lung cancer among the workers was reported (Veiga et al 2004). …”

Section: Introductionmentioning

confidence: 99%

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Elmekawy

Badran

Seddeek

et al. 2015

Environ Monit Assess

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Non-nuclear industries use raw materials containing significant levels of naturally occurring radioactive material (NORM). The processing of these materials may expose workers engaged in or even people living near such sites to technologically enhanced naturally occurring radioactive material (TENORM) above the natural background. Inductively coupled plasma and gamma ray spectrometry have been used to determine major and trace elements and radionuclide concentrations in various samples, respectively, in order to investigate the environmental impact of coal mining and cement plant in North Sinai, Egypt. Generally, very little attention was directed to the large volumes of waste generated by either type of industrial activities. Different samples were analyzed including various raw materials, coal, charcoal, Portland and white cement, sludge, and wastes. Coal mine and cement plant workers dealing with waste and kaolin, respectively, are subjected to a relatively high annual effective dose. One of the important finding is the enhancement of all measured elements and radionuclides in the sludge found in coal mine. It may pose an environmental threat because of its large volume and its use as combustion material. The mine environment may have constituted Al, Fe, Cr, and V pollution source for the local area. Higher concentration of Al, Fe, Mn, B, Co, Cr, Mn, Ni, Sr, V, and TENORM were found in Portland cement and Zn in white cement. Coal has higher concentrations of Al, Fe, B, Co, Cr, and V as well as (226)Ra and (232)Th. The compiled results from the present study and different worldwide investigations demonstrate the obvious unrealistic ranges normally used for (226)Ra and (232)Th activity concentrations in coal and provided ranges for coal, Portland and white cement, gypsum, and limestone.

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Section: Introductionmentioning

confidence: 99%

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Elmekawy

Badran

Seddeek

et al. 2015

Environ Monit Assess

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“…Generally, radon has highest levels in basements and underground buildings that are in contact with the soil. Exposure to radon has become a great concern to people working in underground spaces (Li et al, 2006a, b, c;Yu et al, 1996a, b;Schmitz and Fritsche, 1992;Veiga et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Indoor radon distribution of subway stations in a Korean major city

Yoon

Chang

Kim

et al. 2010

Journal of Environmental Radioactivity

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“…Considerando agora o aspecto da contaminação por radionuclí-deos, recentemente, no Brasil, foi detectada uma região de alta exposição a radônio, Rn, em minas de carvão 42 . As medidas das concentrações desse elemento e das de seus produtos de decaimento alfa foram feitas diretamente dentro das minas, de modo a estimar a estequiometria do Rn no ambiente de estudo.…”

Section: Químicaunclassified

Marcos da história da radioatividade e tendências atuais

Xavier¹,

Lima²,

Vigna³

et al. 2007

Quím. Nova

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Recebido em 18/5/05; aceito em 14/2/06; publicado na web em 30/8/06 LANDMARKS IN THE HISTORY OF RADIOACTIVITY AND CURRENT TENDENCIES. The first days of radioactivity, the discoveries of X-rays, radioactivity, of α-and β-particles and γ-radiation, of new radioactive elements, of artificial radioactivity, the neutron and positron and nuclear fission are reviewed as well as several adverse historical marks, such as the Manhattan project and some nuclear and radiological accidents. Nuclear energy generation in Brazil and the world, as an alternative to minimize environmental problems, is discussed, as are the medicinal, industrial and food applications of ionizing radiation. The text leads the reader to reflect on the subject and to consider its various aspects with scientific and technological maturity.Keywords: the history oh radioactivity; nuclear accidents; beneficial uses of radioactivity. AS DESCOBERTASA descoberta dos raios-X Na noite de 8 de novembro de 1895, o físico alemão Wilhelm C. Röntgen trabalhava em uma sala totalmente escura, utilizando uma válvula com a qual estudava a condutividade dos gases. A certa distância da válvula, havia uma folha de papel tratada com platinocianeto de bário usada como tela. Röntgen viu com espanto a tela brilhar, emitindo luz 1 . Achou que esta luz não poderia ser proveniente da válvula, pois a mesma estava coberta por uma cartolina negra e nada (luz ou raio catódico) poderia ter vindo dela. Surpreso, fez várias investigações. Virou a tela, expondo o lado sem o revestimento de platinocianeto de bário, e esta continuava a brilhar. Colocou diversos objetos entre a válvula e a tela e viu que todos pareciam transparentes, mas não demorou a ter uma surpresa maior, quando sua mão escorregou em frente à válvula e viu seus ossos na tela. Registrou em chapas fotográficas suas observações e só então teve certeza de que estava diante de algo novo. Em 28 de dezembro de 1895, Röntgen entregou à Sociedade Físico-Médica de Wurzburg, Alemanha, um relatório preliminar de sua descoberta, descrevendo as pesquisas que fizera nas sete semanas anteriores: os objetos tornavam-se transparentes diante dos novos raios que, por serem desconhecidos, chamou-os de raios-X 2 . Em 1901, Röntgen foi laureado com o primeiro Prêmio Nobel da Física. Mais recentemente, seu nome foi dado ao novo elemento 111.A descoberta da radioatividade: as partículas α α α α α e β β β β β e os raios γ γ γ γ γ Antoine H. Becquerel, membro de uma família de quatro gerações de físicos de renome, tinha grande interesse pelas áreas de fosforescência e fluorescência moleculares. A descoberta de Röntgen o levou a fazer observações para verificar se substâncias fosforescentes ou fluorescentes emitiam raios-X. Seus primeiros resultados foram negativos 3 . Com experimentos adicionais utilizando urânio, Becquerel chegou à conclusão de que a radiação penetrante era originária do próprio elemento e não tinha relação com o fenômeno da fluorescên-cia 4 . Esta radiação, que inicialmente ficou conhecida como raios de Becquerel, foi chamada ...

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High radon exposure in a Brazilian underground coal mine

Cited by 34 publications

References 11 publications

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Assessment of elemental and NROM/TENORM hazard potential from non-nuclear industries in North Sinai, Egypt

Indoor radon distribution of subway stations in a Korean major city

Marcos da história da radioatividade e tendências atuais

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