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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Rondônia; Embrapa Roraima. |
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Data corrente: |
27/06/2019 |
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Data da última atualização: |
11/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA JÚNIOR, E. C. da; MARTINS, G. C.; 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.; LOPES, G.; MENEZES, M. D. de; 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; ROBERVAL MONTEIRO BEZERRA DE LIMA, CPAA; KARINE DIAS BATISTA, CPAF-RR; MARCELINO CARNEIRO GUEDES, CPAF-AP; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU. |
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Título: |
Natural variation of arsenic fractions in soils of the Brazilian Amazon. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Science of the Total Environment,v. 687, p. 1219-1231, 2019. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Arsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0–20, 20–40 and 40–60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding of where and how As concentrations are influenced by soil attributes. Total As concentration ranged from 0.98 to 41.71 mg kg−1 with values usually increasing from the topsoil (0–20 cm) to the deepest layer (40–60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents the most important fraction, with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble + available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+. The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers MenosArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0–20, 20–40 and 40–60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding of where and how As concentrations are influenced by soil attributes. Total As concentration ranged from 0.98 to 41.71 mg kg−1 with values usually increasing from the topsoil (0–20 cm) to the deepest layer (40–60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents the most important fraction, with N70% of the As extracted on average in all the sites studied. Still, the extractable fr... Mostrar Tudo |
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Palavras-Chave: |
Carcinogenic. |
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Thesagro: |
Arsênico. |
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Thesaurus Nal: |
Amazonia; Arsenic. |
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Categoria do assunto: |
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K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02779naa a2200325 a 4500
001 2110119
005 2019-11-11
008 2019 bl uuuu u00u1 u #d
100 1 $aSILVA JÚNIOR, E. C. da
245 $aNatural variation of arsenic fractions in soils of the Brazilian Amazon.$h[electronic resource]
260 $c2019
520 $aArsenic (As) in native soils of the Amazon rainforest is a concern due to its likely origin from the Andean rivers, which transport loads of sediments containing substantial amounts of trace elements coming from the cordilleras. Yet, unveiling soil As baseline concentrations in the Amazon basin is still a need because most studies in Brazil have been performed in areas with predominantly high concentrations and cannot express a real baseline value for the region. In this study, 414 soil samples (0–20, 20–40 and 40–60 cm layers) were collected from different sites throughout the Amazon basin - including native Amazon rainforest and minimally disturbed areas - and used to determine total and extractable (soluble + available) As concentrations along with relevant soil physicochemical properties. Descriptive statistics of the data was performed and Pearson correlation supported by a Principal Component Analysis (PCA) provided an improved understanding of where and how As concentrations are influenced by soil attributes. Total As concentration ranged from 0.98 to 41.71 mg kg−1 with values usually increasing from the topsoil (0–20 cm) to the deepest layer (40–60 cm) in all sites studied. Considering the proportional contribution given by each fraction (soluble and available) on extractable As concentration, it is noticeable that KH2PO4-extractable As represents the most important fraction, with N70% of the As extracted on average in all the sites studied. Still, the extractable fractions (soluble + available) correspond to ~0.24% of the total As, on average. Total, available, and soluble As fractions were strongly and positively correlated with soil Al3+. The PCA indicated that soil pH in combination with CEC might be the key factors controlling soil As concentrations and the occurrence of each arsenic fraction in the soil layers
650 $aAmazonia
650 $aArsenic
650 $aArsênico
653 $aCarcinogenic
700 1 $aMARTINS, G. C.
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.
700 1 $aLOPES, G.
700 1 $aMENEZES, M. D. de
700 1 $aBROADLEY, M. R.
700 1 $aYOUNG, S. D.
700 1 $aGUILHERME, L. R. G.
773 $tScience of the Total Environment,v. 687, p. 1219-1231, 2019.
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Embrapa Roraima (CPAF-RR) |
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| 16. |  | CHAVES, J. V. B.; SILVA, J. dos S. V. da. Áreas protegidas no Pantanal em 2018. In: MOSTRA DE ESTAGIÁRIOS E BOLSISTAS DA EMBRAPA INFORMÁTICA AGROPECUÁRIA, 14., 2018, Campinas. Resumos expandidos... Brasília, DF: Embrapa, 2018. p. 111-115. (Embrapa Informática Agropecuária. Eventos técnicos & científicos, 1). Editores técnicos: Carla Geovana do Nascimento Macário, Carla Cristiane Osawa, Flávia Bussaglia Fiorini, Maria Fernanda Moura, Poliana Fernanda Giachetto.| Tipo: Artigo em Anais de Congresso |
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