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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
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Data corrente: |
17/03/2022 |
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Data da última atualização: |
04/07/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA JÚNIOR, E. C. da; WADT, L. H. de O.; SILVA, K. E. da; LIMA, R. M. B. de; BATISTA, K. D.; GUEDES, M. C.; OLIVEIRA JUNIOR, R. C. de; REIS, A. R. dos; LOPES, G.; BROADLEY, M. R.; YOUNG, S. D.; GUILHERME, L. R. G. |
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Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-RO; KATIA EMIDIO DA SILVA, CPAA; KARINE DIAS BATISTA, CPAF-RR; MARCELINO CARNEIRO GUEDES, CPAF-AP; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU. |
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Título: |
Geochemistry of selenium, barium, and iodine in representative soils of the Brazilian Amazon rainforest. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Science of The Total Environment, v. 828, 154426, July 2022. |
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DOI: |
https://doi.org/10.1016/j.scitotenv.2022.154426 |
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Idioma: |
Inglês |
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Conteúdo: |
The Amazon rainforest is a heterogeneous ecosystem and its soils exhibit geographically variable concentrations of trace elements. In this region, anthropic activities - e.g., agriculture and mining - are numerous and varied, and even natural areas are at risk of contamination by trace elements, either of geogenic or anthropogenic origin. A reliable dataset of benchmark values for selenium (Se), barium (Ba), and iodine (I) concentrations in soils is needed for use as a reference in research and public policies in the region. In this study, 9 selected sites in the Brazilian Amazon rainforest within areas represented by Oxisols and Ultisols were assessed for relevant soil physicochemical characteristics, along with the concentrations of total Se (SeTot), total Ba (BaTot), and sequentially-extracted soluble Se (SeSol) and adsorbed Se (SeAd) in 3 different soil layers (0?20, 20?40, and 40?60 cm). In addition, organically bound-Se (SeOrg) and total I (ITot) concentrations in the surface layer (0?20 cm) were measured. Soil Se concentrations (SeTot) were considered safe and are likely a result of contributions of sedimentary deposits from the Andes. Available Se (SeSol + SeAd) accounted for 4.5% of SeTot, on average, while SeOrg in the topsoil accounted for more than 50% of SeTot. Barium in the western Amazon (state of Acre) and central Amazon (Anori, state of Amazonas) exceeded national prevention levels (PVs). Furthermore, the average ITot in the studied topsoils (5.4 mg kg−1) surpassed the worldwide mean. Notwithstanding, the close relationship found between the total content of the elements (Se, Ba, and I) and soil texture (clay, silt, and sand) suggests their geogenic source. Finally, our data regarding SeTot, BaTot, and ITot can be used to derive regional quality reference values for Amazon soils and also for updating prevention (PV) and investigation (IV) values established for selected elements by the Brazilian legislation. MenosThe Amazon rainforest is a heterogeneous ecosystem and its soils exhibit geographically variable concentrations of trace elements. In this region, anthropic activities - e.g., agriculture and mining - are numerous and varied, and even natural areas are at risk of contamination by trace elements, either of geogenic or anthropogenic origin. A reliable dataset of benchmark values for selenium (Se), barium (Ba), and iodine (I) concentrations in soils is needed for use as a reference in research and public policies in the region. In this study, 9 selected sites in the Brazilian Amazon rainforest within areas represented by Oxisols and Ultisols were assessed for relevant soil physicochemical characteristics, along with the concentrations of total Se (SeTot), total Ba (BaTot), and sequentially-extracted soluble Se (SeSol) and adsorbed Se (SeAd) in 3 different soil layers (0?20, 20?40, and 40?60 cm). In addition, organically bound-Se (SeOrg) and total I (ITot) concentrations in the surface layer (0?20 cm) were measured. Soil Se concentrations (SeTot) were considered safe and are likely a result of contributions of sedimentary deposits from the Andes. Available Se (SeSol + SeAd) accounted for 4.5% of SeTot, on average, while SeOrg in the topsoil accounted for more than 50% of SeTot. Barium in the western Amazon (state of Acre) and central Amazon (Anori, state of Amazonas) exceeded national prevention levels (PVs). Furthermore, the average ITot in the studied topsoils (5.4 mg kg−... Mostrar Tudo |
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Palavras-Chave: |
Amazon soils; Availability; Geogenic; Quality reference values; Total concentration. |
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Thesagro: |
Solo. |
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Thesaurus Nal: |
Trace elements. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/232614/1/1-s2.0-S0048969722015194-main.pdf
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Marc: |
LEADER 03024naa a2200349 a 4500
001 2140996
005 2022-07-04
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.scitotenv.2022.154426$2DOI
100 1 $aSILVA JÚNIOR, E. C. da
245 $aGeochemistry of selenium, barium, and iodine in representative soils of the Brazilian Amazon rainforest.$h[electronic resource]
260 $c2022
520 $aThe Amazon rainforest is a heterogeneous ecosystem and its soils exhibit geographically variable concentrations of trace elements. In this region, anthropic activities - e.g., agriculture and mining - are numerous and varied, and even natural areas are at risk of contamination by trace elements, either of geogenic or anthropogenic origin. A reliable dataset of benchmark values for selenium (Se), barium (Ba), and iodine (I) concentrations in soils is needed for use as a reference in research and public policies in the region. In this study, 9 selected sites in the Brazilian Amazon rainforest within areas represented by Oxisols and Ultisols were assessed for relevant soil physicochemical characteristics, along with the concentrations of total Se (SeTot), total Ba (BaTot), and sequentially-extracted soluble Se (SeSol) and adsorbed Se (SeAd) in 3 different soil layers (0?20, 20?40, and 40?60 cm). In addition, organically bound-Se (SeOrg) and total I (ITot) concentrations in the surface layer (0?20 cm) were measured. Soil Se concentrations (SeTot) were considered safe and are likely a result of contributions of sedimentary deposits from the Andes. Available Se (SeSol + SeAd) accounted for 4.5% of SeTot, on average, while SeOrg in the topsoil accounted for more than 50% of SeTot. Barium in the western Amazon (state of Acre) and central Amazon (Anori, state of Amazonas) exceeded national prevention levels (PVs). Furthermore, the average ITot in the studied topsoils (5.4 mg kg−1) surpassed the worldwide mean. Notwithstanding, the close relationship found between the total content of the elements (Se, Ba, and I) and soil texture (clay, silt, and sand) suggests their geogenic source. Finally, our data regarding SeTot, BaTot, and ITot can be used to derive regional quality reference values for Amazon soils and also for updating prevention (PV) and investigation (IV) values established for selected elements by the Brazilian legislation.
650 $aTrace elements
650 $aSolo
653 $aAmazon soils
653 $aAvailability
653 $aGeogenic
653 $aQuality reference values
653 $aTotal concentration
700 1 $aWADT, L. H. de O.
700 1 $aSILVA, K. E. da
700 1 $aLIMA, R. M. B. de
700 1 $aBATISTA, K. D.
700 1 $aGUEDES, M. C.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aREIS, A. R. dos
700 1 $aLOPES, G.
700 1 $aBROADLEY, M. R.
700 1 $aYOUNG, S. D.
700 1 $aGUILHERME, L. R. G.
773 $tScience of The Total Environment$gv. 828, 154426, July 2022.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Territorial. |
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Data corrente: |
20/09/2007 |
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Data da última atualização: |
08/02/2024 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
HOTT, M. C.; BATISTELLA, M.; SOARES, V. P. |
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Afiliação: |
Marcos Cicarini Hott, Embrapa Gado de Leite; Mateus Batistella, Embrapa Monitoramento por Satélite; Vicente Paulo Soares, UFV. |
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Título: |
Segmentação de imagens orbitais pela geração de bacias usando operador de textura fractal pelo método box-couting. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... São José dos Campos: INPE, 2007. p. 5827-5829. |
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Idioma: |
Português |
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Conteúdo: |
Segmentação de imagens é um processo baseado no agrupamento ou delimitação do pixels similares estatisticamente a partir de um critério predefinido ou na análise das diferenças nos valores digitais da imagem. O uso de ferramentas de análise fractal tem sido praticado no processamento de imagens de satélite, tal como na produção de imagens de transformação de textura, visto que a imagem orbital, tal como na produção de imagens de transformação de textura, visto que a imagem orbital retrata fenômenos geográficos com estrutura fractal. |
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Palavras-Chave: |
Imagens orbitais; imagens orgitais; segmentação. |
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Thesagro: |
Textura. |
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Categoria do assunto: |
-- |
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URL: |
https://marte.dpi.inpe.br/col/dpi.inpe.br/sbsr@80/2006/10.26.12.53/doc/5827-5829.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/106965/1/1974.pdf
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Marc: |
LEADER 01222nam a2200181 a 4500
001 1595758
005 2024-02-08
008 2007 bl uuuu u00u1 u #d
100 1 $aHOTT, M. C.
245 $aSegmentação de imagens orbitais pela geração de bacias usando operador de textura fractal pelo método box-couting.$h[electronic resource]
260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... São José dos Campos: INPE, 2007. p. 5827-5829.$c5829
520 $aSegmentação de imagens é um processo baseado no agrupamento ou delimitação do pixels similares estatisticamente a partir de um critério predefinido ou na análise das diferenças nos valores digitais da imagem. O uso de ferramentas de análise fractal tem sido praticado no processamento de imagens de satélite, tal como na produção de imagens de transformação de textura, visto que a imagem orbital, tal como na produção de imagens de transformação de textura, visto que a imagem orbital retrata fenômenos geográficos com estrutura fractal.
650 $aTextura
653 $aImagens orbitais
653 $aimagens orgitais
653 $asegmentação
700 1 $aBATISTELLA, M.
700 1 $aSOARES, V. P.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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