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2. Influx of radioactive gas in norm occurrences in Northeastern Brazil

Author

do Nascimento Santos, Josineide Marques, dos Santos Júnior, José Araújo, dos Santos Amaral, Romilton, Fernández, Zahily Herrero, Bezerra, Mariana Brayner Cavalcanti Freire, de Barros Correia, Filipe Lopes, Araújo, Eduardo Eudes Nóbrega, Pereira Guimarães, Cassya Regina, Araújo, Maria Rita Silva, da Silva Medeiros, Nilson Vicente, and de Oliveira, Marcela Ferreira Marques

Published
2022
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3. α Espec-222 as a variant to the radon monitoring method using a solid state nuclear track

Author

do Nascimento Santos, Josineide Marques, dos Santos Júnior, José Araújo, dos Santos Amaral, Romilton, Cavalcanti Freire Bezerra, Mariana Brayner, de Salazar e Fernandes, Thiago, Valcárcel Rojas, Lino Angel, Fernández, Zahily Herrero, Nóbrega de Araújo, Eduardo Eudes, Isidoro de Araújo Rodrigues Azevedo, Andrey José, Lopes de Barros Correia, Filipe, and Milán, Marvic Ortueta

Published
2021
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5. Exposure risk assessment of uranium intake of the milk products from the region of Pernambuco, Brazil

Author

dos Santos Amaral, Romilton, dos Santos Júnior, José Araújo, da Silva Aquino, Fabiana, de Albuquerque Amaral, Bruno, Fernández, Zahily Herrero, Bezerra, Mariana Brayner Cavalcanti Freire, da Silva, Arykerne Nascimento Casado, dos Santos, Djalma Cordeiro, do Nascimento Santos, Josineide Marques, da Silva, Alberto Antônio, and de Barros Correia, Filipe Lopes

Published
2019
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8. MONITORING AND CHARACTERISATION OF NEW EVIDENCE OF NATURAL RADIONUCLIDES IN ROCK OUTCROPS IN PARAÍBA—BRAZIL

Author

do Nascimento Santos, Josineide Marques, primary, dos Santos Júnior, José Araújo, additional, dos Santos Amaral, Romilton, additional, Fernández, Zahily Herrero, additional, Bezerra, Jairo Dias, additional, Cavalcanti Freire Bezerra, Mariana Brayner, additional, da Silva, Arykerne Nascimento Casado, additional, de Araújo, Eduardo Eudes Nóbrega, additional, Rojas, Lino Angel Valcárcel, additional, Milan, Marvic Ortueta, additional, and de Barros Correia, Filipe Lopes, additional

Published
2019
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9. Natural uranium isotopes and 226Ra in surface and groundwater from a basin of a semiarid region in Brazil.

Author

Rojas, Lino Valcarcel, dos Santos Júnior, José Araújo, Alvarado, José Antonio Corcho, Milan, Marvic Ortueta, Röllin, Stefan, Amaral, Romilton Santos, Fernández, Zahily Herrero, and do Nascimento Santos, Josineide Marques

Subjects
URANIUM isotopes, ARID regions, WATER table, RADIOACTIVITY, GROUNDWATER, WATER, GROUNDWATER sampling
Abstract

This research aimed to get information about the uranium and radium activity concentrations in surface and ground water in a semiarid region in Brazil. Mean (and range) activity of 0.46 (0.01–1.8), 0.015 (0.0004–0.066) and 0.32 (0.09–1.32) Bq L− 1 were found for 234U, 235U and 238U, respectively. Uranium radioisotopes account for the higher radioactivity in surface and groundwater, 226Ra was found only in few groundwater samples (0.09–0.61 Bq L− 1). 226Ra/238U (0.15–0.43) and 234U/238U (1.18–1.86) activity ratios are indicative of radioactive disequilibrium in groundwater. Expected effective doses from few water sources can be considered significant if untreated water is used for drinking. [ABSTRACT FROM AUTHOR]

Published
2020
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10. RADIOACTIVE DISEQUILIBRIUM AND DYNAMIC OF NATURAL RADIONUCLIDES IN SOILS IN THE STATE OF PERNAMBUCO—BRAZIL

Author

dos Santos Júnior, José Araújo, primary, dos Santos Amaral, Romilton, additional, do Nascimento Santos, Josineide Marques, additional, da Silva, Arykerne Nascimento Casado, additional, Rojas, Lino Angel Valcárcel, additional, Milan, Marvic Ortueta, additional, de Almeida Maciel Neto, José, additional, Bezerra, Jairo Dias, additional, and Araújo, Eduardo Eudes Nóbrega de, additional

Published
2018
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11. THERMOLUMINESCENT DOSIMETRY IN THE EVALUATION OF NATURAL RADIOACTIVITY INDOOR OF HOMES NEAR THE URANIUM DEPOSIT OF PARAÍBA, BRAZIL

Author

Bezerra, Jairo Dias, primary, dos Santos Júnior, José Araújo, additional, dos Santos Amaral, Romilton, additional, Menezes, Rômulo Simões Cezar, additional, Fernández, Zahily Herrero, additional, do Nascimento Santos, Josineide Marques, additional, da Silva, Arykerne Nascimento Casado, additional, and Rojas, Lino Angel Valcárcel, additional

Published
2017
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12. THERMOLUMINESCENT DOSIMETRY IN THE EVALUATION OF NATURAL RADIOACTIVITY INDOOR OF HOMES NEAR THE URANIUM DEPOSIT OF PARAÍBA, BRAZIL.

Author

Bezerra, Jairo Dias, dos Santos Júnior, José Araújo, dos Santos Amaral, Romilton, Menezes, Rômulo Simões Cezar, Fernández, Zahily Herrero, do Nascimento Santos, Josineide Marques, da Silva, Arykerne Nascimento Casado, and Rojas, Lino Angel Valcárcel

Subjects
BACKGROUND radiation, NATURAL radioactivity, RADIATION protection, RADIATION exposure, NUCLEAR energy
Abstract

High levels of primordial radionuclides have been reported in soils and rocks of São José de Espinharas, in the state of Paraiba, Brazil. These radionuclides are derived from high concentrations of natural uranium and thorium from a mine in the region. Thus, there is a need for a dosimetric evaluation in the area near the mine and the surrounding cities. In this study, the annual effective dose was analyzed in 178 points of five cities. The measurements were performed using thermoluminescent dosimetry with LiF:Mg, Ti (TLD-100). The annual effective dose from environmental exposure varied from 0.71 to 2.07 mSv, with an arithmetic mean of 0.99 mSv. This average is more than twice the estimated value for indoor environments adopted by the UNSCEAR, which is 0.41 mSv. These results will allow establishing reference values for background radiation of the region and criteria to infer a stochastic risk for the local population. [ABSTRACT FROM AUTHOR]

Published
2018
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13. INVESTIGATION OF NATURAL RADIOACTIVITY AS A POSSIBLE DRIVER OF CANCER INCIDENCE IN PARAÍBA, NORTHEASTERN BRAZIL.

Author

do Nascimento Santos, Josineide Marques, dos Santos Júnior, José Araújo, de Albuquerque Melo, Ana Maria Mendoça, dos Santos Amaral, Romilton, Menezes, Rômulo Simões Cezar, Fernández, Zahily Herrero, Rojas, Lino Angel Valcárcel, Dias Bezerra, Jairo, da Silva, Alberto Antônio, Damascena, Kennedy Francys Rodrigues, and da Silva Medeiros, Nilson Vicente

Subjects
RADIOACTIVE substances in soils, DISEASE incidence, CANCER diagnosis, RADIATION doses, BACKGROUND radiation
Abstract

An increase of health problems has been reported in the city of Triunfo, Paraíba, NE Brazil. This pattern has been attributed to environmental radiation since there are uranium deposits in the neighboring municipalities. The present study aimed to carry a radiometric survey in Triunfo to determine effective dose from external outdoor radiation exposure. The results were obtained through 'in situ' measurements using a gamma spectrometry system. The results ranged from 0.06 to 0.38 mSv/y, mean of 0.20 mSv/y. Due to the low value of the effective dose rate, we concluded that the area is characterized by low background radiation. Therefore, natural radioactivity is probably not directly influencing the increase in cancer incidence in the region. However, there is a need for complementary studies in this area to evaluate the dose from potential exposure to ingested and inhaled natural radionuclides from natural radioactivity in soil, rocks, vegetation and water. [ABSTRACT FROM AUTHOR]

Published
2018
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