Gross alpha and beta activities in drinking water from Goiás state, Brazil

Raquel Maia Mingote; Regina Apolinária Nogueira; Heliana Ferreira Da Costa

doi:10.15392/bjrs.v7i3.410

Authors

Raquel Maia Mingote Comissão Nacional de Energia Nuclear - CNEN
Regina Apolinária Nogueira Centro Regional de Ciências Nucleares do Centro-Oeste - CRCN-CO / CNEN
Heliana Ferreira Da Costa CRCN-CO - Radioproteção

DOI:

https://doi.org/10.15392/bjrs.v7i3.410

Keywords:

radioactivity, liquid scintillation, censored data

Abstract

Detection of gross alpha and beta radioactivity is important for a quick surveying of both natural and anthropogenic radioactivity in water. Furthermore, gross alpha and gross beta parameters are included in Brazilian legislation on quality of drinking water. In this work, a low background liquid scintillation spectrometer was used to simultaneously determine gross alpha and gross beta in samples of the public water supplies in the state of Goiás, Brazil, during 2010-2015. Sample preparation involved evaporation to concentrate the sample ten-fold. The results indicate that the water meets the radioactivity standards required by the regulations MS 2914/2011 of the Brazilian Department of Health. Concerning the high level of censored observations, a statistical treatment of data was conducted by using analysis methods of censored data to provide a reference value of the gross alpha and beta radioactivity in drinking water from the state of Goiás. The estimated typical activities are very low, 0.030 Bq.L-1 and 0.058 Bq.L-1, for gross alpha and gross beta, respectively.

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Author Biographies

Regina Apolinária Nogueira, Centro Regional de Ciências Nucleares do Centro-Oeste - CRCN-CO / CNEN

CRCN-CO - Radioproteção

Heliana Ferreira Da Costa, CRCN-CO - Radioproteção

Departamento de Radioproteção.

References

IBGE - Instituto Brasileiro de Geografia e Estatística. Estados @. 2016. Available at: < http://www.ibge.gov.br/estadosat/perfil.php?sigla=go>. Last accessed: 19 Jul. 2017.

IAEA - International Atomic Energy Agency. The radiological accident in Goiânia. 1988. Available at: < http://www-pub.iaea.org/mtcd/publications/pdf/pub815_web.pdf>. Last accessed: 03 Jul. 2017.

BRASIL. Portaria MS n. 2914, de 12 de Dezembro de 2011. Dispõe sobre os procedimen-tos de controle e vigilância da qualidade da água para consumo humano e seu padrão de po-tabilidade. Diário Oficial da União. Brasília, DF. 2011. Seção 1, p. 39-46.

WHO - World Health Organization. Guidelines for drinking-water quality. 2011

MINGOTE, R. M.; COSTA, H. F. DA. Avaliação do método de espectrometria por cintila-ção em meio líquido para a medida das atividades alfa e beta total em água: aplicação a águas de abastecimento público no estado de Goiás, Brasil. Engenharia Sanitária e Ambiental. vol. 21, 2016 p. 569-578.

HELSEL, D. R. Statistics for Censored Environmental Data Using Minitab and R. New York: Jonh Wiley and Sons, 2nd ed. 2012.

APHA; AWWA; WEF - American Public Health Association, American Water Works As-sociation, Water Environment Federation, eds. Standard Methods for the Examination of Water and Wasterwater. Sample collection and preservation, ch. Method 7010B. 21 ed, 2005. p. 7-2; 7-3.

CURRIE, L. A. Limits for qualitative detection and quantitative determination: appli-cation to radiochemistry. Anal. Chem., vol. 40, n. 3. 1968. p. 586-593.

TAUHATA, L.; VIANNA, M. E. C. M.; OLIVEIRA A. E. DE; FERREIRA, A. C.; BRA-GANÇA, M. J. C.; CLAIN, A. F.; FARIA R. Q. DE. The Brazilian national intercomparison pro-gram (PNI/IRD/CNEN): evaluation of 15 years of data. J. Environ. Radioact., vol. 86, p.384-390, 2006

TEAM, R CORE. R: A Language and Environment for Statistical Computing. R Foun-dation for Statistical Computing, Vienna, Austria, 2015.

LEE, L. NADA: Nondetects and Data Analysis for Environmental Data. R package ver-sion 1.6-1, 2017.

MEHDIZADEH, S.; FAGHIHI, R.; SINA, S.; DERAKHSHAN, S. Measurements of natural radioactivity concentration in drinking water samples of Shiraz city and springs of the Fars prov-ince, Iran, and dose estimation. Radiation Protection Dosimetry. vol. 157, n. 1, p. 112-119, 2013.

KAMENOVA-TOTZEVA, R. M.; KOTOVA, R. M.; TENEV, J. G.; TOTZEV, A. V.; BADULIN, V. M. Natural radioactivity content in Bulgarian drinking waters and consequent dose estimation. Radiation Protection Dosimetry, vol. 164, n 3, p. 402-407, 2015.

G.WALLOVA, Z. KULICHOVA, E. RAJCZYKOVA, AND J. MAKOVINSKA. Survey of radioactivity along the Bosna River. Journal of Radioanalytical and Nuclear Chemistry, vol. 307, n. 1, p. 247-252, 2016.

TURGAY, M. E.; YAZICI, A. N.; TASKIN, H.; KAM, E.; KARAHAN, G. Assessment of gross and radioactivity for drinking water in Hatay province, Turkey. Desalinationand Water Treatment, vol. 57, n. 11, p. 4960-4965, 2016.

KORKMAZ, M. E.; AGAR, O.; ŞAHIN, M. Gross α and β activity concentrations in vari-ous water from Karaman, Turkey. Environmental Earth Sciences, vol. 75, n. 1, p. 14, 2016.