Baseline, mapping and dose estimation of natural radioactivity in soils of the Brazilian state of Alagoas

Filgueiras, Rogério de Andrade; Silva, Ademir X.; Ribeiro, F. C. A.; Lauria, Dejanira da Costa; Viglio, Eduardo Paim

doi:10.1016/j.radphyschem.2019.05.022

Cited by 26 publications

(12 citation statements)

References 7 publications

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“…Previous studies carried out in the states of Alagoas and Rio Grande do Norte, Northeastern Brazil, showed a high concentration of 40 K, ranging from 6.0 to 2160 Bq kg −1 and 56.4 to 1972 Bq kg −1 , respectively [81,82]. In this region, the high concentrations may be related to semi-arid climate, with high evapotranspiration and low rainfall [81], which makes it difficult to leach 40 K. On the other hand, the soils studied in the present work present high natural acidity and lower capacity of cation retention, which lead to the removal of elements by weathering under high rainfall rates [32]. In the agricultural system, plant uptake is the main process responsible for the decrease in 40 K in soils, mainly in the cultivation of citrus (Table S2).…”

Section: Radioelements In Soils and Plantsmentioning

confidence: 91%

“…In the studied soils, the concentrations of 40 K ranged from 15.6 to 31.2 Bq kg −1 , values that are below the worldwide average of 400 Bq kg −1 [60]. Previous studies carried out in the states of Alagoas and Rio Grande do Norte, Northeastern Brazil, showed a high concentration of 40 K, ranging from 6.0 to 2160 Bq kg −1 and 56.4 to 1972 Bq kg −1 , respectively [81,82]. In this region, the high concentrations may be related to semi-arid climate, with high evapotranspiration and low rainfall [81], which makes it difficult to leach 40 K. On the other hand, the soils studied in the present work present high natural acidity and lower capacity of cation retention, which lead to the removal of elements by weathering under high rainfall rates [32].…”

Section: Radioelements In Soils and Plantsmentioning

confidence: 96%

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Long Term Application of Fertilizers in Eastern Amazon and Effect on Uranium and Thorium Levels in Soils

et al. 2021

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In recent years, the use of fertilizers has increased in the Amazon. Phosphate fertilizers, which are commonly used, can present high concentrations of radioelements. In the present study, the activity concentrations of uranium (U) and thorium (Th) in Oxisols and Ultisols cultivated with citrus (Citrus sinensis (L.) Osbeck), oil palm (Elaeis guineensis Jacq.) and black pepper (Piper nigrum L.), with 26, 10 and 5 years of implantation, respectively, were evaluated. The potential risk of contamination was estimated by the enrichment (EF) and bioaccumulation (BAF) factors. Pearson’s correlation coefficients indicated a significant relationship between the concentrations of U and Th in soil and plant and the soil properties pH, Ca2+, Mg2+, K+ and P. The enrichment (EF < 2) and bioaccumulation (0.01 < BAF < 0.05) factors were low. In plant tissues, the concentrations of 238U followed the order: citrus > black pepper > oil palm, and the concentrations of 232Th followed the sequence: black pepper >> citrus > oil palm. The activity concentrations of 238U and 232Th in the soil cultivated with black pepper, as well as in the soil of the reference area close to the citrus plantation, were higher than the world average values of 35 and 30 Bq kg−1, respectively, established by the United Nations Scientific Committee on Effects of Atomic Radiation. Perennial crops that are fertilized annually must be monitored by environmental agencies due the accumulation of elements that can promote potential risks to human health.

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Section: Radioelements In Soils and Plantsmentioning

confidence: 91%

Section: Radioelements In Soils and Plantsmentioning

confidence: 96%

Long Term Application of Fertilizers in Eastern Amazon and Effect on Uranium and Thorium Levels in Soils

et al. 2021

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“…Several studies demonstrate the dependent relationship between natural radiation and the lithology of a given terrain (Godoy et al, 2011;Szabó et al, 2014;Ciotoli et al, 2017;Ribeiro et al, 2017;Filgueiras et al, 2020). Among the various approaches, the box diagram comparison proved to be a versatile tool to analyze the concentration of radiation activity in terrain from different geological formations.…”

Section: Correlation Between Geology and Natural Radiancementioning

confidence: 99%

“…According to otton1992, high concentrations of these radioactive elements occur in association with a variety of granitic igneous rocks and related soils. In Brazil, there are several academic and occupational researches at local scale that study subsurface geogenic radioactive activities (Godoy et al, 2011;Campos et al, 2013;Merola and Schenka, 2017;Farias, 2019;Filgueiras et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Mapping the Exposure Rate of Geogenic Radiation in Caçapava do Sul – Rio Grande do Sul, Brazil

et al. 2021

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“…High metal concentrations in water, soil, and sediment due to anthropological activities cause harmful effects on the biota [13][14][15][16]. Phosphate-based fertilizers employed in agropastoral activities generally have potentially toxic metal (Pb, Al, Cd, Cu, Fe, Zn, Ni, Mn, Cr) and radionuclide ( 232 Th and 40 K) contents, being one of the main anthropological sources of environmental site pollution [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Environmental Assessment and Toxic Metal-Contamination Level in Surface Sediment of a Water Reservoir in the Brazilian Cerrado

Cabral

Nogueira

Becegato

et al. 2021

Water

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Polluted sediments limit the useful and biotic life of a water reservoir. Therefore, the classification and verification of the contamination and pollution levels of water reservoirs are essentials for the preservation of the biota and to organize the actions of environmental management. Thus, the aim of this study is to determine the concentrations of potentially toxic metals [lead (Pb), zinc (Zn), nickel (Ni), copper (Cu), and cadmium (Cd)] in sediment samples collected in the water reservoir of the Foz do Rio Claro Hydroelectric Power Plant (FRCHEPP) and estimate the contamination level by using the geoaccumulation index (Igeo). All results were compared with the values established by the CONAMA Resolution 454/2012. The Cu and Cd concentrations in the sediment samples were above Level II for most of the analyzed points in comparison with the data of the CONAMA resolution, being classified as poor quality sediments. Moreover, the Igeo values indicated potential pollution of the water reservoir sediment by Cu and Cd. Hence, the water reservoir was classified between moderately and extremely polluted. From this work it is possible to conclude that the frequent monitoring of the sediment quality in the FRCHEPP water reservoir is an indispensable action for periodic evaluation of the hydrographic basin quality in the study region, considering its importance as water supply and power generation for the state of Goiás, Brazil. Overall, the results of this work can be important to study other water reservoirs around the world.

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Baseline, mapping and dose estimation of natural radioactivity in soils of the Brazilian state of Alagoas

Cited by 26 publications

References 7 publications

Long Term Application of Fertilizers in Eastern Amazon and Effect on Uranium and Thorium Levels in Soils

Long Term Application of Fertilizers in Eastern Amazon and Effect on Uranium and Thorium Levels in Soils

Mapping the Exposure Rate of Geogenic Radiation in Caçapava do Sul – Rio Grande do Sul, Brazil

Environmental Assessment and Toxic Metal-Contamination Level in Surface Sediment of a Water Reservoir in the Brazilian Cerrado

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