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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
14/02/2006 |
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Data da última atualização: |
15/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KRAUSS, M.; WILCKE, W.; MARTIUS, C.; BANDEIRA, A. G.; GARCIA, M. V. B.; AMELUNG, W. |
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Afiliação: |
Berlin University of Technology; ZEF; Universidade Federal da Paraíba; Embrapa Amazônia Ocidental.; MARCOS VINICIUS BASTOS GARCIA, CPAA. |
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Título: |
Atmospheric versus biological sources of polycyclic aromatic hydrocarbons (PAHs) in a tropical rain forest environment. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Environmental Pollution, v. 135, n. 1, p. 143-154, maio 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
To distinguish between pyrogenic and biological sources of PAHs in a tropical rain forest near Manaus, Brazil, we determined the concentrations of 21 PAHs in leaves, bark, twigs, and stem wood of forest trees, dead wood, mineral topsoil, litter layer, air, and Nasutitermes termite nest compartments. Naphthalene (NAPH) was the most abundant PAH with concentrations of 35 ng m(-3) in air (> 85% of the Sigma21PAHs concentration), up to 1000 mug kg(-1) in plants (> 90%), 477 mug kg(-1) in litter (> 90%), 32 mug kg(-1) in topsoil (> 90%). and 160 mug kg(-1) (> 55%) in termite nests. In plants, the concentrations of PAHs in general decreased in the order leaves > bark > twigs > stem wood. The concentrations of most low-molecular weight PAHs in leaves and bark were near equilibrium with air, but those of NAPH were up to 50 times higher. Thus, the atmosphere seemed to be the major source of all PAHs in plants except for NAPH. Additionally, phenanthrene (PHEN) had elevated concentrations in bark and twigs of Vismia cayennensis trees (12-60 mug kg(-1)), which might have produced PHEN. In the mineral soil, perylene (PERY) was more abundant than in the litter layer, probably because of in situ biological production. Nasutitermes nests had the highest concentrations of most PAHs in exterior compartments (on average 8 and 15 mug kg(-1) compared to < 3 mug kg(-1) in interior parts) and high PERY concentrations in all compartments (12-86 mug kg(-1)), indicating an in situ production of PERY in the nests. Our results demonstrate that the deposition of pyrolytic PAHs from the atmosphere controls the concentrations of most PAHs. However, the occurrence of NAPH, PHEN, and PERY in plants, termite nests, and soils at elevated concentrations supports the assumption of their biological origin. MenosTo distinguish between pyrogenic and biological sources of PAHs in a tropical rain forest near Manaus, Brazil, we determined the concentrations of 21 PAHs in leaves, bark, twigs, and stem wood of forest trees, dead wood, mineral topsoil, litter layer, air, and Nasutitermes termite nest compartments. Naphthalene (NAPH) was the most abundant PAH with concentrations of 35 ng m(-3) in air (> 85% of the Sigma21PAHs concentration), up to 1000 mug kg(-1) in plants (> 90%), 477 mug kg(-1) in litter (> 90%), 32 mug kg(-1) in topsoil (> 90%). and 160 mug kg(-1) (> 55%) in termite nests. In plants, the concentrations of PAHs in general decreased in the order leaves > bark > twigs > stem wood. The concentrations of most low-molecular weight PAHs in leaves and bark were near equilibrium with air, but those of NAPH were up to 50 times higher. Thus, the atmosphere seemed to be the major source of all PAHs in plants except for NAPH. Additionally, phenanthrene (PHEN) had elevated concentrations in bark and twigs of Vismia cayennensis trees (12-60 mug kg(-1)), which might have produced PHEN. In the mineral soil, perylene (PERY) was more abundant than in the litter layer, probably because of in situ biological production. Nasutitermes nests had the highest concentrations of most PAHs in exterior compartments (on average 8 and 15 mug kg(-1) compared to < 3 mug kg(-1) in interior parts) and high PERY concentrations in all compartments (12-86 mug kg(-1)), indicating an in situ production of PERY ... Mostrar Tudo |
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Palavras-Chave: |
Floresta Amazônica. |
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Thesagro: |
Floresta Tropical Úmida; Planta; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02487naa a2200229 a 4500
001 1677338
005 2018-05-15
008 2005 bl uuuu u00u1 u #d
100 1 $aKRAUSS, M.
245 $aAtmospheric versus biological sources of polycyclic aromatic hydrocarbons (PAHs) in a tropical rain forest environment.
260 $c2005
520 $aTo distinguish between pyrogenic and biological sources of PAHs in a tropical rain forest near Manaus, Brazil, we determined the concentrations of 21 PAHs in leaves, bark, twigs, and stem wood of forest trees, dead wood, mineral topsoil, litter layer, air, and Nasutitermes termite nest compartments. Naphthalene (NAPH) was the most abundant PAH with concentrations of 35 ng m(-3) in air (> 85% of the Sigma21PAHs concentration), up to 1000 mug kg(-1) in plants (> 90%), 477 mug kg(-1) in litter (> 90%), 32 mug kg(-1) in topsoil (> 90%). and 160 mug kg(-1) (> 55%) in termite nests. In plants, the concentrations of PAHs in general decreased in the order leaves > bark > twigs > stem wood. The concentrations of most low-molecular weight PAHs in leaves and bark were near equilibrium with air, but those of NAPH were up to 50 times higher. Thus, the atmosphere seemed to be the major source of all PAHs in plants except for NAPH. Additionally, phenanthrene (PHEN) had elevated concentrations in bark and twigs of Vismia cayennensis trees (12-60 mug kg(-1)), which might have produced PHEN. In the mineral soil, perylene (PERY) was more abundant than in the litter layer, probably because of in situ biological production. Nasutitermes nests had the highest concentrations of most PAHs in exterior compartments (on average 8 and 15 mug kg(-1) compared to < 3 mug kg(-1) in interior parts) and high PERY concentrations in all compartments (12-86 mug kg(-1)), indicating an in situ production of PERY in the nests. Our results demonstrate that the deposition of pyrolytic PAHs from the atmosphere controls the concentrations of most PAHs. However, the occurrence of NAPH, PHEN, and PERY in plants, termite nests, and soils at elevated concentrations supports the assumption of their biological origin.
650 $aFloresta Tropical Úmida
650 $aPlanta
650 $aSolo
653 $aFloresta Amazônica
700 1 $aWILCKE, W.
700 1 $aMARTIUS, C.
700 1 $aBANDEIRA, A. G.
700 1 $aGARCIA, M. V. B.
700 1 $aAMELUNG, W.
773 $tEnvironmental Pollution$gv. 135, n. 1, p. 143-154, maio 2005.
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