Pb-210 in Rock and Soils of the Semi-Arid Agreste Region of Pernambuco, Brazil

Silva, C. M.; Amaral, Romilton dos Santos; Tabosa, J. N.; Júnior, José Araújo dos Santos; Menezes, Rômulo Simões Cézar; Farias, E. E. G.; Bezerra, Jairo Dias; Silvestre, Raul; Oliveira, G. F.

doi:10.1007/s00128-009-9669-9

Cited by 7 publications

(8 citation statements)

References 7 publications

(13 reference statements)

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“…In the studies carried out by Silva et al [18], high concentrations of radioactive lead ( 210 Pb) were determined in samples of rocks and soils from the radioactive anomaly of Pedra e Venturosa, whose values ranged from 3.2 to 201 kBq.kg -1 and 195 to 86,400 Bq.kg −1 , respectively. The big problem with the 210 Pb element is that, in addition to being radioactive, it is also quite toxic to animals, plants and humans.…”

Section: Natural Radionuclides In Rocks and Soilsmentioning

confidence: 99%

“…Forage plants efficiently absorb natural radionuclides. Studies carried out on dairy farms in the cities of Pedra and Venturosa, show that forage palm (Opuntia ficus-indica), bufell grass (Cenchrus ciliares) and elephant grass (Pennisetum purpureum) consumed by dairy cows, absorbed high amounts of 226 Ra (SILVA et al, 2004), 210 Pb [18] and 228 Ra [20].…”

Section: Natural Radionuclides In Forage Plantsmentioning

confidence: 99%

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Analysis of legal responsibility for natural radioactive anomaly in the wild semi-arid region of Pernambuco

Fernandes¹,

Alexandre²,

Carvalho³

et al. 2020

IJAERS

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High concentrations of uranium-238 ( 238 U) and thorium-232 ( 232 Th) were found in rocks of the natural radioactive anomaly existing in the cities of Pedra and Venturosa located in the State of Pernambuco. The studies were carried out in a technical partnership between the former company NUCLEBRÁS and CPRM, in 1975. After exhaustive prospecting studies, the anomaly was considered economically unfeasible for mining. Although the anomaly was considered economically unviable, the inhabitants of the municipalities of Pedra and Venturosa are subject to high levels of natural radiation. In Brazil, the exploration of radioactive ores is the responsibility of the Union, and the National Nuclear Energy Commission (CNEN) is responsible for the management of such resources, with the Nuclear Industries of Brazil (INB) being responsible for mining activities. In CNEN regulations there are no radiological protection measures that must be adopted in the case of natural radioactive anomalies considered economically unfeasible. Thus, and within this context, the present study aimed to research, within the scope of Brazilian legislation, the legal responsibility for the natural radioactive anomaly of the cities of Pedra and Venturosa. For that, a bibliographic review search was used in the specialized literature. The results obtained showed that, legally, CNEN is responsible for the natural radioactive anomaly located between the cities of Pedra and Venturosa, and, therefore, it must adopt mitigation measures of radiological protection in the area where the anomaly is located.

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Section: Natural Radionuclides In Rocks and Soilsmentioning

confidence: 99%

Section: Natural Radionuclides In Forage Plantsmentioning

confidence: 99%

Analysis of legal responsibility for natural radioactive anomaly in the wild semi-arid region of Pernambuco

Fernandes¹,

Alexandre²,

Carvalho³

et al. 2020

IJAERS

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“…However, at present there are no data on the concentrations of toxic and trace elements in cow's milk produced in the semi-arid region of Pernambuco. The study of the transfer of Pb to the rock-soil-plant-milk systems is essential in view of the high natural levels of Pb in the rock and soil in this region [16][17][18]. The dairy basin in the state of Pernambuco plays an important role in the local economy and in supplying milk, since it is an important producing area where milk is treated industrially and is also sold at fairs and local markets [17].…”

Section: Introductionmentioning

confidence: 99%

“…The dairy basin in the state of Pernambuco plays an important role in the local economy and in supplying milk, since it is an important producing area where milk is treated industrially and is also sold at fairs and local markets [17]. The rearing system in most of the properties in the region is extensive or semi-intensive, and some of the Pb ingested by cows via the consumption of contaminated forage could be transferred to the milk [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Factors Affecting Toxic and Essential Trace Element Concentrations in Cow’s Milk Produced in the State of Pernambuco, Brazil

Oliveira Filho,

López-Alonso,

Vieira Marcolino

et al. 2023

Animals

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The aim of this study was to provide information on the levels of toxic (Cd and Pb) and essential (Cu, Fe, and Zn) elements in cow’s milk produced in the State of Pernambuco (Brazil). A total of 142 samples of raw milk were collected, and the concentrations of essential and toxic elements were determined using inductively coupled plasma-optical emission spectrometry. In almost 30% of the samples analyzed, the Pb content exceeded the maximum level established in the Brazilian legislation (0.05 mg/L). By contrast, in all the samples, the Cd content was below the maximum allowable level (0.02 mg/L). The essential trace elements Cu, Fe, and Zn were generally present at lower concentrations than reported in other studies and can be considered within the deficient range for cow’s milk. Statistical and chemometric procedures were used to evaluate the main factors influencing the metal concentrations (proximity to major roads, presence of effluents, and milking method). The study findings demonstrate that the proximity of the farms to major roads influences the concentrations of Cd, Pb, and Cu and that this is the main factor explaining the Pb content of milk. In addition, the presence of effluents influenced the concentrations of Cu, while no relationship between the metal content and the milking method was observed. Thus, in accordance with the study findings, the consumption of cow’s milk produced in the region can be considered a risk to public health due to the high concentrations of Pb and the low concentrations of other essential minerals such as Cu, Zn, and Fe in some of the milk samples.

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“…There is another model for calculating this flux and the sedimentation rate is the Constant Rate of Supply model (CRS), which assumes a constant unsupported lead-210 flux to the sediment, but permits the sediment supply to vary [4][5][6]. According to this model ( Figure 1):…”

Section: Introductionmentioning

confidence: 99%

Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil

et al. 2012

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Abstract:The Apipucos Reservoir is located in Pernambuco-Brazil. Several districts of the metropolitan area use this reservoir to dispose of rubbish, waste and sewage. Dating sediments uses the 210 Pb from the atmosphere. 210Pb is a daughter of the 222 Rn, which emanates from the soil but is different from that contained in the sediment, which is in balance with the 226 Ra. The chosen model for dating sediments depends on certain conditions: in environments where the amount of sediment can vary, the Constant Rate of Supply (CRS) model is adopted. In environments where the sediments can be considered to be constant, a Constant Initial Concentration (CIC) model is applied. A 70 cm long and 5 cm internal-diameter wide core was used for sediment sampling. Samples were dried at 105 C, and about 5 g dry material was dissolved with acids. The 210 Pb and 226 Ra content was determined by their radioactive descendants' concentrations. For the second sampling point, both models could be used. The results showed an increase in sedimentation rate over the last 50-60 years. We could conclude that the top sediment interval had been there 30 years ago. We could decide that the CRS was the best applicable model.

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Pb-210 in Rock and Soils of the Semi-Arid Agreste Region of Pernambuco, Brazil

Cited by 7 publications

References 7 publications

Analysis of legal responsibility for natural radioactive anomaly in the wild semi-arid region of Pernambuco

Analysis of legal responsibility for natural radioactive anomaly in the wild semi-arid region of Pernambuco

Factors Affecting Toxic and Essential Trace Element Concentrations in Cow’s Milk Produced in the State of Pernambuco, Brazil

Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil

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