| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
04/05/2001 |
|
Data da última atualização: |
30/03/2017 |
|
Autoria: |
WILCKE, W.; AMELUNG, W. |
|
Título: |
Persistent organic pollutants in native grassland soils along a climosequence in North America. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
Soil Science Society of America Journal, v.64, n.6, p.2140-2148, 2000. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Among the controls on the fate of harzardous persistent organic pollutants (POPs) in the environment, soil organic matter (SOM) and climate play an outstanding role. Thus, it may be possible to predict POP concentrations at background sites from SOM properties and climate elements. we therefore related polycyclic aromatic hydrocarbon (PAH) and polychlorinated biphenyl (PCB) concentrations in 18 mollic epipedons under native grassland to SOM properties (lignin-derived phenolos, polycarboxylic benzoic acids [PCBAs], aromaticity, and polarity of alkali-extractable SOM) and climatic elements. The sum of 20 PAH (20PAHs) concentrations ranged from 63 to 321 ug kg-1, and that of 14 PCB (14PCBs) concentrations ranged from 7.9 to 93 ug kg-1, except at one contaminated site (3136 ug kh-1). On average, phenanthrene (PHEN, 38% of the 20PAHs concentrations) and naphthalene (NAPH, 28%) were the most abundant PAHs, congeners 28 (22% of the 14PCB concentrations) and 101 (17%) were the most abundant PCBs. Soil organic C (SOC) concentrations correlated with the 20PAHs concentrations; the C concentrations in the sum of eight PCBAs, a marker for black C, correlated with the concentraqtions of higher molecular weight PAHs, except in soils with cyric temperature regime. The 14PCBs concentrations was independent of any soil property. The contribution of NAPH to the 20PAHs concentrations and that of the up to tetrachlorinated PCBs to the 14PCBs concentrations decreased with increasing mean annual temperatrure (MAT). Th percentage of PCB 101 increased with increasing MAT. However, the temperature effect was not strong. Mean annual precipitation (MAP) neither effected PAH nor PCB patterns. Our results indicate that the easily measured SOC concentrations may be used to predict PAH concentrations in native grassland soils of the prairie. Including MAT improves the prediction of NAPH concentrations. The influence of MAT on PCB concentrations is obvious, but the correlation is too weak to be used for reliable predictions. MenosAmong the controls on the fate of harzardous persistent organic pollutants (POPs) in the environment, soil organic matter (SOM) and climate play an outstanding role. Thus, it may be possible to predict POP concentrations at background sites from SOM properties and climate elements. we therefore related polycyclic aromatic hydrocarbon (PAH) and polychlorinated biphenyl (PCB) concentrations in 18 mollic epipedons under native grassland to SOM properties (lignin-derived phenolos, polycarboxylic benzoic acids [PCBAs], aromaticity, and polarity of alkali-extractable SOM) and climatic elements. The sum of 20 PAH (20PAHs) concentrations ranged from 63 to 321 ug kg-1, and that of 14 PCB (14PCBs) concentrations ranged from 7.9 to 93 ug kg-1, except at one contaminated site (3136 ug kh-1). On average, phenanthrene (PHEN, 38% of the 20PAHs concentrations) and naphthalene (NAPH, 28%) were the most abundant PAHs, congeners 28 (22% of the 14PCB concentrations) and 101 (17%) were the most abundant PCBs. Soil organic C (SOC) concentrations correlated with the 20PAHs concentrations; the C concentrations in the sum of eight PCBAs, a marker for black C, correlated with the concentraqtions of higher molecular weight PAHs, except in soils with cyric temperature regime. The 14PCBs concentrations was independent of any soil property. The contribution of NAPH to the 20PAHs concentrations and that of the up to tetrachlorinated PCBs to the 14PCBs concentrations decreased with increasing mean annual t... Mostrar Tudo |
|
Palavras-Chave: |
Contaminante organico; Native grassland; Organic pollutant. |
|
Thesagro: |
Pastagem Nativa; Solo. |
|
Thesaurus Nal: |
soil. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02620naa a2200205 a 4500
001 1806255
005 2017-03-30
008 2000 bl --- 0-- u #d
100 1 $aWILCKE, W.
245 $aPersistent organic pollutants in native grassland soils along a climosequence in North America.
260 $c2000
520 $aAmong the controls on the fate of harzardous persistent organic pollutants (POPs) in the environment, soil organic matter (SOM) and climate play an outstanding role. Thus, it may be possible to predict POP concentrations at background sites from SOM properties and climate elements. we therefore related polycyclic aromatic hydrocarbon (PAH) and polychlorinated biphenyl (PCB) concentrations in 18 mollic epipedons under native grassland to SOM properties (lignin-derived phenolos, polycarboxylic benzoic acids [PCBAs], aromaticity, and polarity of alkali-extractable SOM) and climatic elements. The sum of 20 PAH (20PAHs) concentrations ranged from 63 to 321 ug kg-1, and that of 14 PCB (14PCBs) concentrations ranged from 7.9 to 93 ug kg-1, except at one contaminated site (3136 ug kh-1). On average, phenanthrene (PHEN, 38% of the 20PAHs concentrations) and naphthalene (NAPH, 28%) were the most abundant PAHs, congeners 28 (22% of the 14PCB concentrations) and 101 (17%) were the most abundant PCBs. Soil organic C (SOC) concentrations correlated with the 20PAHs concentrations; the C concentrations in the sum of eight PCBAs, a marker for black C, correlated with the concentraqtions of higher molecular weight PAHs, except in soils with cyric temperature regime. The 14PCBs concentrations was independent of any soil property. The contribution of NAPH to the 20PAHs concentrations and that of the up to tetrachlorinated PCBs to the 14PCBs concentrations decreased with increasing mean annual temperatrure (MAT). Th percentage of PCB 101 increased with increasing MAT. However, the temperature effect was not strong. Mean annual precipitation (MAP) neither effected PAH nor PCB patterns. Our results indicate that the easily measured SOC concentrations may be used to predict PAH concentrations in native grassland soils of the prairie. Including MAT improves the prediction of NAPH concentrations. The influence of MAT on PCB concentrations is obvious, but the correlation is too weak to be used for reliable predictions.
650 $asoil
650 $aPastagem Nativa
650 $aSolo
653 $aContaminante organico
653 $aNative grassland
653 $aOrganic pollutant
700 1 $aAMELUNG, W.
773 $tSoil Science Society of America Journal$gv.64, n.6, p.2140-2148, 2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Suínos e Aves. |
|
Data corrente: |
31/05/2007 |
|
Data da última atualização: |
12/02/2015 |
|
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
|
Autoria: |
SOBESTIANSKY, J.; WENTZ, I.; SILVEIRA, P. R. S. da; FREITAS, A. R. de. |
|
Afiliação: |
JURIJ SOBESTIANSKY, CNPSA; IVO WENTZ, CNPSA; PAULO ROBERTO SOUZA DA SILVEIRA, CNPSA; ALFREDO RIBEIRO DE FREITAS, CNPSA. |
|
Título: |
Lesões nos cascos e claudicação em suínos puros de pedigree em idade de comercialização. |
|
Ano de publicação: |
1985 |
|
Fonte/Imprenta: |
Concórdia: Embrapa Suínos e Aves, 1985. |
|
Páginas: |
5 p. |
|
Série: |
(Embrapa Suínos e Aves. Comunicado técnico, 89). |
|
Idioma: |
Português |
|
Palavras-Chave: |
Cascos; Lesão no casco; Lesões. |
|
Thesagro: |
Claudicação; Comercialização; Suíno. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/59125/1/CUsersPiazzonDocuments89.pdf
|
|
Marc: |
LEADER 00675nam a2200229 a 4500
001 1443520
005 2015-02-12
008 1985 bl uuuu u0uu1 u #d
100 1 $aSOBESTIANSKY, J.
245 $aLesões nos cascos e claudicação em suínos puros de pedigree em idade de comercialização.
260 $aConcórdia: Embrapa Suínos e Aves$c1985
300 $a5 p.
490 $a(Embrapa Suínos e Aves. Comunicado técnico, 89).
650 $aClaudicação
650 $aComercialização
650 $aSuíno
653 $aCascos
653 $aLesão no casco
653 $aLesões
700 1 $aWENTZ, I.
700 1 $aSILVEIRA, P. R. S. da
700 1 $aFREITAS, A. R. de
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Suínos e Aves (CNPSA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
