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| 1. |  | MENDONÇA, R. J. de; CAMBRAIA, J.; OLIVA, M. A.; OLIVEIRA, J. A. de. Capacidade de cultivares de arroz de modificar o pH de soluções nutritivas na presença de alumínio. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 40, n. 5, p. 447-452, maio 2005 Título em inglês: Rice cultivars ability to change nutrient solution pH in the presence of aluminum.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 2. | | MENDONÇA, R. J. de; CAMBRAIA, J.; OLIVEIRA, J. A. de; OLIVA, M. A. Efeito do alumínio na absorção e na utilização de macronutrientes em duas cultivares de arroz. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 7, p. 843-848, jul. 2003 Título em inglês: Aluminum effects on the uptake and utilization of macronutrients in two rice cultivars.| Biblioteca(s): Embrapa Unidades Centrais. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
17/02/2017 |
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Data da última atualização: |
17/04/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SÁNEZ, J.; FROEHNER, S.; HANSEL, F. A.; PARRON, L. M.; KNAPIK, H.; FERNANDES, C.; RIZZI, J. |
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Afiliação: |
Juan Sánez, UFPR, Graduate Program in Water Resources and Environmental Engineering; Sandro Froehner, UFPR, Department of Environmental Engineering; FABRICIO AUGUSTO HANSEL, CNPF; LUCILIA MARIA PARRON VARGAS, CNPF; Heloise Knapik, UFPR, Graduate Program in Water Resources and Environmental Engineering; Cristóvão Fernandes, UFPR, Graduate Program in Water Resources and Environmental Engineering; Juliane Rizzi, UFPR, Graduate Program in Water Resources and Environmental Engineering. |
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Título: |
Bile acids combined with fecal sterols: a multiple biomarker approach for deciphering fecal pollution using river sediments. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Soils and Sediments, v. 17, n. 3, p. 861-872, Mar. 2017. |
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DOI: |
10.1007/s11368-016-1592-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Purpose: Fecal sterols (FSs) and bile acids (BAs) are biomarkers that can be used to track sewage pollution. These biomarkers offer an alternative to microbiological analyses, which have several weaknesses, including a lack of specificity. FSs are recognized fecal biomarkers, but there are very few studies showing the use of BAs as a fecal tracer, especially in river sediments, to the best of our knowledge. Thus, the aim of this work was to determine the response of BAs as an alternative biomarker of fecal pollution in parallel to FSs in freshwater sediments and use both biomarker groups to decipher the potential fecal pollution sources in a subtropical river. Materials and methods: Eight BAs and six FSs were extracted from sediments of the Iguassu River, southern Brazil, and analyzed by GC-MS. Results and discussion Among the sterols, coprostanol was dominant (20?4488 μg g−1), followed by stigmastanol (8.67?1788 μg g−1) and cholesterol (4.64?881 μg g−1). 3α- Deoxycholic acid (3α-DCA) was the predominant BA (1.63? 871 μg g−1), followed by 3α-lithocholic acid (3α-LCA) (1.77?170 μg g−1). The trends of the total BA and FS contents were different. Very few correlations between the individual BAs and FSs were found, probably due to their different environmental transformation processes and origins, whether animal or human. This watershed encompasses a mixture of land uses, including agricultural applications involving manure and composted sewage sludge as fertilizers and urban occupation, including several treated and untreated sewage discharges. When FS ratios were applied, most sites tested positive for human fecal pollution. Different ratios using secondary and primary BAs were assessed, e.g., (3β-LCA + 3α- LCA)/(3β-DCA + 3α-DCA), 3α-LCA/3α-DCA, and 3α- DCA/CDA. Most ratios detected the influences of different land uses and inputs along the river, including treated and untreated sewage. Furthermore, at the site considered to have moderate fecal pollution, the ratios were in contrast to those obtained from the sites with heavier fecal pollution. Conclusions: Bile acids and fecal sterols were successfully applied to decipher different origins of fecal pollution using sediments. The contents of individual BAs and derived ratios detected the different land uses and inputs along the river, distinguishing regions with low to high fecal pollution. In general, BAs and FSs did not appear to be strongly related, individually, or as a ratio. However, each compound class provides different information, and using both provides a clearer picture of the potential sources of fecal pollution, especially for a mixed land use region. MenosPurpose: Fecal sterols (FSs) and bile acids (BAs) are biomarkers that can be used to track sewage pollution. These biomarkers offer an alternative to microbiological analyses, which have several weaknesses, including a lack of specificity. FSs are recognized fecal biomarkers, but there are very few studies showing the use of BAs as a fecal tracer, especially in river sediments, to the best of our knowledge. Thus, the aim of this work was to determine the response of BAs as an alternative biomarker of fecal pollution in parallel to FSs in freshwater sediments and use both biomarker groups to decipher the potential fecal pollution sources in a subtropical river. Materials and methods: Eight BAs and six FSs were extracted from sediments of the Iguassu River, southern Brazil, and analyzed by GC-MS. Results and discussion Among the sterols, coprostanol was dominant (20?4488 μg g−1), followed by stigmastanol (8.67?1788 μg g−1) and cholesterol (4.64?881 μg g−1). 3α- Deoxycholic acid (3α-DCA) was the predominant BA (1.63? 871 μg g−1), followed by 3α-lithocholic acid (3α-LCA) (1.77?170 μg g−1). The trends of the total BA and FS contents were different. Very few correlations between the individual BAs and FSs were found, probably due to their different environmental transformation processes and origins, whether animal or human. This watershed encompasses a mixture of land uses, including agricultural applicatio... Mostrar Tudo |
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Palavras-Chave: |
Biomarcador; Fecal biomarker; Fecal sterols; Multimolecular approach; Poluição fecal. |
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Thesagro: |
Contaminação; Rio; Sedimento. |
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Thesaurus NAL: |
Bile acids; Sediment contamination. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 03730naa a2200325 a 4500
001 2064663
005 2017-04-17
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1007/s11368-016-1592-1$2DOI
100 1 $aSÁNEZ, J.
245 $aBile acids combined with fecal sterols$ba multiple biomarker approach for deciphering fecal pollution using river sediments.$h[electronic resource]
260 $c2017
520 $aPurpose: Fecal sterols (FSs) and bile acids (BAs) are biomarkers that can be used to track sewage pollution. These biomarkers offer an alternative to microbiological analyses, which have several weaknesses, including a lack of specificity. FSs are recognized fecal biomarkers, but there are very few studies showing the use of BAs as a fecal tracer, especially in river sediments, to the best of our knowledge. Thus, the aim of this work was to determine the response of BAs as an alternative biomarker of fecal pollution in parallel to FSs in freshwater sediments and use both biomarker groups to decipher the potential fecal pollution sources in a subtropical river. Materials and methods: Eight BAs and six FSs were extracted from sediments of the Iguassu River, southern Brazil, and analyzed by GC-MS. Results and discussion Among the sterols, coprostanol was dominant (20?4488 μg g−1), followed by stigmastanol (8.67?1788 μg g−1) and cholesterol (4.64?881 μg g−1). 3α- Deoxycholic acid (3α-DCA) was the predominant BA (1.63? 871 μg g−1), followed by 3α-lithocholic acid (3α-LCA) (1.77?170 μg g−1). The trends of the total BA and FS contents were different. Very few correlations between the individual BAs and FSs were found, probably due to their different environmental transformation processes and origins, whether animal or human. This watershed encompasses a mixture of land uses, including agricultural applications involving manure and composted sewage sludge as fertilizers and urban occupation, including several treated and untreated sewage discharges. When FS ratios were applied, most sites tested positive for human fecal pollution. Different ratios using secondary and primary BAs were assessed, e.g., (3β-LCA + 3α- LCA)/(3β-DCA + 3α-DCA), 3α-LCA/3α-DCA, and 3α- DCA/CDA. Most ratios detected the influences of different land uses and inputs along the river, including treated and untreated sewage. Furthermore, at the site considered to have moderate fecal pollution, the ratios were in contrast to those obtained from the sites with heavier fecal pollution. Conclusions: Bile acids and fecal sterols were successfully applied to decipher different origins of fecal pollution using sediments. The contents of individual BAs and derived ratios detected the different land uses and inputs along the river, distinguishing regions with low to high fecal pollution. In general, BAs and FSs did not appear to be strongly related, individually, or as a ratio. However, each compound class provides different information, and using both provides a clearer picture of the potential sources of fecal pollution, especially for a mixed land use region.
650 $aBile acids
650 $aSediment contamination
650 $aContaminação
650 $aRio
650 $aSedimento
653 $aBiomarcador
653 $aFecal biomarker
653 $aFecal sterols
653 $aMultimolecular approach
653 $aPoluição fecal
700 1 $aFROEHNER, S.
700 1 $aHANSEL, F. A.
700 1 $aPARRON, L. M.
700 1 $aKNAPIK, H.
700 1 $aFERNANDES, C.
700 1 $aRIZZI, J.
773 $tJournal of Soils and Sediments$gv. 17, n. 3, p. 861-872, Mar. 2017.
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