Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

Rentería-Villalobos, Marusia; Cortés, Manuel Reyes; Mantero, Juan Carlos; Manjón, G.; Garcı́a-Tenorio, R.; Herrera, E.; Montero-Cabrera, M. E.

doi:10.1100/2012/616430

Cited by 8 publications

(11 citation statements)

References 34 publications

(31 reference statements)

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“…For instance, Lepomis cyanellus : . From results of Table 3, uranium activity concentrations present in fish fillet are low, in comparison with both the reference values established by UNSCEAR 2008 [57], and the values of 0.14–2.6 and 0.6–4.5 Bq∙kg −1 (dry weight) for 238 U and 234 U, respectively, reported in samples of species Cichlasoma labridens in San Marcos Dam (Chihuahua) [33]. The uranium concentrations found in this study are also lower than those presented in other publications related with uranium mine activities [58,59].…”

Section: Resultsmentioning

confidence: 74%

Potential Human Health Risk by Metal(loid)s, 234,238U and 210Po due to Consumption of Fish from the “Luis L. Leon” Reservoir (Northern México)

Luna-Porres

Rodríguez-Villa

Herrera-Peraza

et al. 2014

IJERPH

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Concentrations of As, Cu, Fe, Hg, Pb and Zn and activity concentrations from 234,238U and 210Po in water, fillet, liver and gills were determined in three stocked fish species from the Luis L. Leon reservoir, located in Northern Mexico. The considered species were Lepomis cyanellus, Cyprinus carpio and Ictalurus furcatus. 238U and 234U activity concentration (AC) in fillet samples showed values of 0.007–0.014 and 0.01–0.02 Bq∙kg−1 wet weight (ww), respectively. Liver samples for L. cyanellus, C. carpio and I. furcatus present 210Po AC of 1.16–3.26, 0.70–1.13 and 0.93–1.37 Bq∙kg−1 ww. Arsenic, mercury and lead concentration intervals in fillet samples were 0.13–0.39, 0.005–0.126 and 0.009–0.08 mg∙kg−1 ww, respectively, while in gill samples they were 0.11–0.43, 0.002–0.039 and 0.02–0.26 mg∙kg−1 ww. The elemental Bioaccumulation Factor (BAF) for fish tissues with respect to their concentrations in water was determined. L. cyanellus showed the highest BAF values for As and total U, being BAFAs = 37 and 40 L∙kg−1 in fillet and gills, respectively, and BAFU total = 1.5 L∙kg−1 in fillet. I. furcatus showed the highest BAF values for Hg and Pb, being BAFHg = 40 and 13 L∙kg−1 in fillet and gills, and BAFPb = 6.5 and 22 L∙kg−1 in fillet and gills, respectively. Some metal(loid) concentrations are slightly higher than European regulations for fish fillets. The difference in concentrations of metal(loid)s in fillet among the studied species is probably due to their differences in diet and habitat.

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Section: Resultsmentioning

confidence: 74%

Potential Human Health Risk by Metal(loid)s, 234,238U and 210Po due to Consumption of Fish from the “Luis L. Leon” Reservoir (Northern México)

Luna-Porres

Rodríguez-Villa

Herrera-Peraza

et al. 2014

IJERPH

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“…In addition, in the San Marcos area, located NW of Chihuahua City, there are two uranium mineral outcrops [ 17 ]. Previous studies have demonstrated that this area shows higher radioactivity levels in surface water, sediments and biota [ 18 ]. Likewise, the authors have found that there is mobility of the uranium by surface and ground water from the San Marcos area to the low levels of the Chihuahua valley [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

Lifetime Effective Dose Assessment Based on Background Outdoor Gamma Exposure in Chihuahua City, Mexico

Luevano-Gurrola

Perez-Tapia

Pinedo-Alvarez

et al. 2015

IJERPH

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Determining ionizing radiation in a geographic area serves to assess its effects on a population’s health. The aim of this study was to evaluate the spatial distribution of the background environmental outdoor gamma dose rates in Chihuahua City. This study also estimated the annual effective dose and the lifetime cancer risks of the population of this city. To determine the outdoor gamma dose rate in air, the annual effective dose and the lifetime cancer risk, 48 sampling points were randomly selected in Chihuahua City. Outdoor gamma dose rate measurements were carried out by using a Geiger-Müller counter. Outdoor gamma dose rates ranged from 113 to 310 nGy·h−1. At the same sites, 48 soil samples were taken to obtain the activity concentrations of 226Ra, 232Th and 40K and to calculate their terrestrial gamma dose rates. Radioisotope activity concentrations were determined by gamma spectrometry. Calculated gamma dose rates ranged from 56 to 193 nGy·h−1. Results indicated that the lifetime effective dose of the inhabitants of Chihuahua City is on average 19.8 mSv, resulting in a lifetime cancer risk of 0.001. In addition, the mean of the activity concentrations in soil were 52, 73 and 1097 Bq·kg−1, for 226Ra, 232Th and 40K, respectively. From the analysis, the spatial distribution of 232Th, 226Ra and 40K is to the north, to the north-center and to the south of city, respectively. In conclusion, the natural background gamma dose received by the inhabitants of Chihuahua City is high and mainly due to the geological characteristics of the zone. From the radiological point of view, this kind of study allows us to identify the importance of manmade environments, which are often highly variable and difficult to characterize.

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“…Geographical references of uranium outcrops provided from a group of experts in Mexico (Mx) and others mentioned in the bibliography [3,4,7,21] were used as the second database.…”

Section: Datamentioning

confidence: 99%

“…The exploration and exploitation of uranium ores in Chihuahua, Mexico, took place in the decades of [1970][1971][1972][1973][1974][1975][1976][1977][1978][1979][1980], by the enterprise Uranio de Mexico (URAMEX). Although there has not been commercial production of uranium in Mexico, in Chihuahua State there are several uranium outcrops and radioactive anomalies, which led Chihuahua to be known as the "uranium province" [1,2,3,4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Spatial analysis techniques applied to uranium prospecting in Chihuahua State, Mexico

Garza¹,

Cabrera²,

Sanı́n³

et al. 2014

AIP Conference Proceedings

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Abstract.To estimate the distribution of uranium minerals in Chihuahua, the advanced statistical model "Maximun Entropy Method" (MaxEnt) was applied. A distinguishing feature of this method is that it can fit more complex models in case of small datasets (x and y data), as is the location of uranium ores in the State of Chihuahua. For georeferencing uranium ores, a database from the United States Geological Survey and workgroup of experts in Mexico was used. The main contribution of this paper is the proposal of maximum entropy techniques to obtain the mineral`s potential distribution. For this model were used 24 environmental layers like topography, gravimetry, climate (worldclim), soil properties and others that were useful to project the uranium`s distribution across the study area. For the validation of the places predicted by the model, comparisons were done with other research of the Mexican Service of Geological Survey, with direct exploration of specific areas and by talks with former exploration workers of the enterprise "Uranio de Mexico". Results. New uranium areas predicted by the model were validated, finding some relationship between the model predictions and geological faults. Conclusions. Modeling by spatial analysis provides additional information to the energy and mineral resources sectors.

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Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

Cited by 8 publications

References 34 publications

Potential Human Health Risk by Metal(loid)s, 234,238U and 210Po due to Consumption of Fish from the “Luis L. Leon” Reservoir (Northern México)

Potential Human Health Risk by Metal(loid)s, 234,238U and 210Po due to Consumption of Fish from the “Luis L. Leon” Reservoir (Northern México)

Lifetime Effective Dose Assessment Based on Background Outdoor Gamma Exposure in Chihuahua City, Mexico

Spatial analysis techniques applied to uranium prospecting in Chihuahua State, Mexico

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