Geochemistry of selenium, barium, and iodine in representative soils of the Brazilian Amazon rainforest

Silva, Ediu Carlos da; Wadt, L. H. de O.; Silva, Kátia Emídio da; Lima, R. M. B. de; Batista, K. D.; Guedes, Marcelino Carneiro; Oliveira, Raimundo Cosme de; Reis, André Rodrigues dos; Lopes, Gertrudes Teixeira; Broadley, Martin R.; Young, Scott D.; Guilherme, Luiz Roberto Guimarães

doi:10.1016/j.scitotenv.2022.154426

Cited by 6 publications

(4 citation statements)

References 53 publications

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“…In samples from the state of Pará, [50] reported Se concentrations of 1.2-151 µg g −1 ; whereas for 71 Brazil nut trees distributed in the regions of Acre, Mato Grosso, Roraima, Amapá, and Amazonas, the levels of Se ranged from <0.5 to 146.6 µg g −1 . The concentration of Se in the nut can be influenced by soil pH, geology, and hydrology [21,22]. Soil pH is strictly related to the Se absorption capacity by plants, as observed by [21] when studying different soil types in the Amazon Forest, noting that even in soils with lower Se concentrations, the available fraction (Se soluble + Se adsorbed ) was higher in higher pH sites (~5.5 to 6).…”

Section: Discussionmentioning

confidence: 95%

“…The concentration of Se in the nut can be influenced by soil pH, geology, and hydrology [21,22]. Soil pH is strictly related to the Se absorption capacity by plants, as observed by [21] when studying different soil types in the Amazon Forest, noting that even in soils with lower Se concentrations, the available fraction (Se soluble + Se adsorbed ) was higher in higher pH sites (~5.5 to 6).…”

Section: Discussionmentioning

confidence: 95%

“…The chemical composition of extracted chestnuts can be influenced by the location of the parent trees. This occurs because the concentrations of trace elements in the soil are variable and are influenced by soil pH, which is observed for the mineral selenium (Se), which is found in soil at safe concentrations of <5 mg kg −1 , but slightly abundant in acidic soils [20,21]. Nuts are rich sources of Se, which acts in the production of selenoproteins, associated with maintaining the integrity of cell membranes, developing sperm cells, regulating thyroid hormones, and mitigating stress and intestinal inflammation [22].…”

Section: Introductionmentioning

confidence: 99%

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Functional Fruit Trees from the Atlantic and Amazon Forests: Selection of Potential Chestnut Trees Rich in Antioxidants, Nutrients, and Fatty Acids

Palacio de Araujo,

Medeiros Simões,

Lins Monteiro Rosa

et al. 2023

Foods

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The Amazon rainforest and the biodiversity hotspot of the Atlantic Forest are home to fruit trees that produce functional foods, which are still underutilized. The present study aimed to select potential functional nut donor trees from two Brazilian chestnuts, by evaluating the nutritional and antioxidant composition of the nuts and the fatty acid profile of the oil. The nutritional characteristics, antioxidants, oil fatty acid profile, and X-ray densitometry of the nuts were evaluated, as well as the characterization of leaf and soil nutrients for each parent tree. The nut oil was evaluated through Brix (%), mass (g), yield (%), and the fatty acid profile. For L. pisonis, the most nutritious nuts were produced by L. pisonis tree 4 (N > P > K > Mg > Ca > Zn > Fe) and L. pisonis tree 6 (P > Ca > Mg > Mn > Zn > Cu > Fe), and for the species L. lanceolata, L. lanceolata tree 6 (N > P > Ca > Mg > Zn > Fe > Cu) and L. lanceolata tree 2 (P > K > Mg > Zn > Cu). In L. pisonis, the highest production of anthocyanins, DPPH, total phenolics, and flavonoids was obtained from the nuts of L. pisonis tree 4 as well as for L. lanceolata, from L. lanceolata tree 1, except for flavonoids. The Brix of the oil from the nuts of both species showed no difference between the trees and the fatty acid profile with a similar amount between saturated (48–65%) and unsaturated (34–57%) fatty acids. Both species have nuts rich in nutrients and antioxidant compounds and can be considered unconventional functional foods. The data collected in the present study confirm that the nuts of these species can replace other foods as a source of selenium.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Functional Fruit Trees from the Atlantic and Amazon Forests: Selection of Potential Chestnut Trees Rich in Antioxidants, Nutrients, and Fatty Acids

Palacio de Araujo,

Medeiros Simões,

Lins Monteiro Rosa

et al. 2023

Foods

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“…Ba is an alkaline earth metal, located in the sixth cycle of the periodic table IIA family, and is the most active alkaline earth metal element. Some studies have shown that the main sources of Ba in natural soil are natural parent material and mining [ 64 , 65 ]. However, the average value of Ba content in soils in the study area is 530.9 mg·kg −1 , which is much higher than the soil environmental background value of Henan Province (502 mg·kg −1 ), so the possibility of coming from natural parent material is low.…”

Section: Resultsmentioning

confidence: 99%

Source Analysis and Contamination Assessment of Potentially Toxic Element in Soil of Small Watershed in Mountainous Area of Southern Henan, China

Chen

Cao

et al. 2022

IJERPH

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In this study, the concentrations of potentially toxic elements in 283 topsoil samples were determined. Håkanson toxicity response coefficient modified matter element extension model was introduced to evaluate the soil elements contamination, and the results were compared with the pollution index method. The sources and spatial distribution of soil elements were analyzed by the combination of the PMF model and IDW interpolation. The results are as follows, 1: The concentration distribution of potentially toxic elements is different in space. Higher concentrations were found in the vicinity of the mining area and farmland. 2: The weight of all elements has changed significantly. The evaluation result of the matter-element extension model shows that 68.55% of the topsoil in the study area is clean soil, and Hg is the main contamination element. The evaluation result is roughly the same as that of the pollution index method, indicating that the evaluation result of the matter-element extension model with modified is accurate and reasonable. 3: Potentially toxic elements mainly come from the mixed sources of atmospheric sedimentation and agricultural activities (22.59%), the mixed sources of agricultural activities and mining (20.26%), the mixed sources of traffic activities, nature and mining (36.30%), the mixed sources of pesticide use and soil parent material (20.85%).

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Characteristics and the possible origins of selenium in surface soil in Lanling County, Shandong Province, China

Deng,

Zhao,

et al. 2023

Int. J. Environ. Sci. Technol.

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Geochemistry of selenium, barium, and iodine in representative soils of the Brazilian Amazon rainforest

Cited by 6 publications

References 53 publications

Functional Fruit Trees from the Atlantic and Amazon Forests: Selection of Potential Chestnut Trees Rich in Antioxidants, Nutrients, and Fatty Acids

Functional Fruit Trees from the Atlantic and Amazon Forests: Selection of Potential Chestnut Trees Rich in Antioxidants, Nutrients, and Fatty Acids

Source Analysis and Contamination Assessment of Potentially Toxic Element in Soil of Small Watershed in Mountainous Area of Southern Henan, China

Characteristics and the possible origins of selenium in surface soil in Lanling County, Shandong Province, China

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