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Radiation Protection Dosimetry Advance Access originally published online on January 6, 2006
Radiation Protection Dosimetry 2006 121(2):148-157; doi:10.1093/rpd/nci382
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Natural radioactivity in groundwater and estimates of committed effective dose due to water ingestion in the state of Chihuahua (Mexico)

L. Villalba1, M. E. Montero-Cabrera1,*, G. Manjón-Collado2, L. Colmenero-Sujo1,3, M. Rentería-Villalobos1, A. Cano-Jiménez1, A. Rodríguez-Pineda4, I. Dávila-Rangel5, L. Quirino-Torres5 and E. F. Herrera-Peraza1

1 Centro de Investigación en Materiales Avanzados, S.C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, C.P. 31109, Chih., Mexico
2 Departamento de Física Aplicada II de la Escuela de Superior de Arquitectura de la Universidad de Sevilla, Ave Reina Mercedes s/n, Sevilla, España, Spain
3 Instituto Tecnológico de Chihuahua II, Ave. de las Industrias 11101, Chihuahua, Chih., Mexico
4 Centro de Investigación Sobre la Sequía, Instituto de Ecología A.C., Carretera a Ojinaga km 33.3, CP 32900, Aldama, Chih., Mexico
5 Unidad Académica de Estudios Nucleares, Universidad Autónoma de Zacatecas, Ciprés 20, Zacatecas, Zac., Mexico

* Corresponding author: elena.montero{at}cimav.edu.mx

Received July 21, 2005, amended November 15, 2005, accepted December 5, 2005


  Abstract

The activity concentration of 222Rn, 226Ra and total uranium in groundwater samples collected from wells distributed throughout the state of Chihuahua has been measured. The values obtained of total uranium activity concentration in groundwater throughout the state run from <0.03 up to 1.34 Bq l–1. Generally, radium activity concentration was <0.16 Bq l–1, with some exceptions; in spring water of San Diego de Alcalá, in contrast, the value reached ~5.3 Bq l–1. Radon activity concentration obtained throughout the state was from 1.0 to 39.8 Bq l–1. A linear correlation between uranium and radon dissolved in groundwater of individual wells was observed near Chihuahua City. Committed effective dose estimates for reference individuals were performed, with results as high as 134 µSv for infants in Aldama city. In Aldama and Chihuahua cities the average and many individual wells showed activity concentration values of uranium exceeding the Mexican norm of drinking water quality.


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