Daily ingestion of , , , and in vegetables by inhabitants of Rio de Janeiro City

Santos, Eliane Eugênia dos; Lauria, Dejanira da Costa; Amaral, E.C.S.; Rochedo, E.R.R.

doi:10.1016/s0265-931x(01)00152-7

Cited by 75 publications

(30 citation statements)

References 15 publications

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“…Santos et al (2002) reported that the estimated annual effective dose, due to the ingestion of vegetables (leafy vegetables, fruit, root, bean and rice) and their derived products (sugar, coffee, manioc flour, wheat flour, corn flour and pasta) by the adult inhabitants of Rio de Janeiro City with the long-lived natural radionuclides ( 232 Th,238 U, 210 Pb, 226 Ra and 228 Ra), reached 14.5 mSv. Taking into account the data for water and milk, the dose value increases to 29 mSv.…”

Section: Introductionmentioning

confidence: 99%

Soil to plant transfer of 238U, 226Ra and 232Th on a uranium mining-impacted soil from southeastern China

Chen

Zhu

2005

Journal of Environmental Radioactivity

166

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Section: Introductionmentioning

confidence: 99%

Soil to plant transfer of 238U, 226Ra and 232Th on a uranium mining-impacted soil from southeastern China

Chen

Zhu

2005

Journal of Environmental Radioactivity

166

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“…In general, the observed concentrations of the nuclides were in the range of worldwide values [1][2][3][4][5][6][7], although higher than reference concentrations of natural radionuclides in foods assumed by UNSCEAR [13] which range from less than 0.001 to about 0.2 Bq/kg (see Table 1). Individual samples with high activity concentration (oats and rye) should be considered as special cases and the reason for the high values further investigated.…”

Section: Activity Concentrations In Food Samplesmentioning

confidence: 61%

“…Compared to the annual effective dose of no more than 200 Sv/a from natural radionuclides in food as assessed by UNSCEAR [13] this does not imply an unacceptable level of exposure. For comparative purposes the average annual effective dose from ingestion of natural radionuclides in Sv/a is estimated as 14.5 in Brazil [6], 23.9 in Nigeria [2], 83.9 in the UK [5], 110 in Korea [3] and 69-280 in Hong Kong [7].…”

Section: S218mentioning

confidence: 99%

“…Intake of these radionuclides may vary considerably because of differences among classes of food in the diet. Comprehensive studies on the concentration of natural radionuclides in foodstuffs and the dose due to intake of these radionuclides through the diet have been carried out in various part of the world [1][2][3][4][5][6][7]. Information on the dietary intake of natural radionuclides in South Africa is relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

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A first order assessment of the potential radiological impact of foodstuffs grown in a catchment area influenced by mining and mineral processing industries

et al. 2011

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Abstract. Natural radioactivity is associated with the vast mineral resources in South Africa in such concentrations that the radionuclides from the natural uranium and thorium decay series are found to pose concern for public exposure to communities living around these areas. Consumption of water and food is usually the most important route by which natural radionuclides can enter the human body and assessment of natural radionuclide levels in different foods and diets is therefore important to estimate the intake of these radionuclides by man. Sensitive measurement of three major radionuclides (in addition to 238 227 Ac and 228 Ra also require improved sensitivity. In order to evaluate the yearly dose due to an individual source at a screening level of 25 Sv/a, one is faced with a required lower limit of determination (LLD) of 0.1 to 0.5 Bq/kg for certain foodstuffs. In this study the potential radiological impact of foodstuffs grown in a catchment area influenced by mining and mineral processing industries in South Africa, was determined by measuring the natural radionuclides in a number of foodstuffs collected from the area. The radionuclides were measured by non-destructive techniques such as Instrumental Neutron Activation Analysis (INAA) and low background gamma spectrometry. The assessment of natural radionuclides in foods allowed us to evaluate the items that present the highest risk to the population, and compare this to the limits established by the National Nuclear Regulator (NNR). From the public's point of view it is important to ensure the population that the contaminant levels in specific food as a result of mining activities, do not exceed the permissible limits. For the majority of the analysed foodstuffs, the estimated dose was less than 250 Sv/a. Overestimation of dose, due to poor measurement detection limits, was clearly indicated for some of the samples. For most of the analysed nuclides, suitable data for evaluation of the yearly dose at the screening level of 25 Sv/a was obtained by broad energy gamma analysis of ashed samples. However, nuclides such as 230 Th, 210 Po and 231 Pa has to be analysed by radiochemical separation through acid destruction of dried foodstuffs followed by individual element separations to provide suitable data with a low enough LLD not to result in an overestimation of the calculated dose.

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“…Vegetable samples were washed, peeled when necessary, and dried in air. After that, they were oven dried at 80˚C for approximately 16 h [23].…”

Section: Methodsmentioning

confidence: 99%

Radium and Uranium Concentrations Measurements in Vegetables Samples of Iraq

Hashim¹,

Najam²

2015

Detection

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In the present study twenty-two vegetable samples were collected from Iraqi market. Sealed can technique using CR-39 plastic track detector strippable has been used in order to measure radium and uranium concentrations. Etching was done with 6.25 N NaOH and optical microscope was used with the purpose of counting of alpha particle tracks. The values of effective radium content are found to range from 0.074 Bq/ kg to 0.566 Bq/ kg with the mean value of 0.317 Bq/kg. The values of uranium concentrations are found to range from 0.081 ppm to 0.615 ppm with the mean value of 0.345 ppm. Positive correlation has been observed between radium concentration and uranium concentrations in vegetable samples. Measurements of radium and uranium concentrations in vegetables are important from the health protection point of view, so simple and reliable analytical methods must be available.

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Daily ingestion of , , , and in vegetables by inhabitants of Rio de Janeiro City

Cited by 75 publications

References 15 publications

Soil to plant transfer of 238U, 226Ra and 232Th on a uranium mining-impacted soil from southeastern China

Soil to plant transfer of 238U, 226Ra and 232Th on a uranium mining-impacted soil from southeastern China

A first order assessment of the potential radiological impact of foodstuffs grown in a catchment area influenced by mining and mineral processing industries

Radium and Uranium Concentrations Measurements in Vegetables Samples of Iraq

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