A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015 |
Resumo: | Water samples were collected in Middle Amazonia from the Amazon River, Rio Negro and 17 tributaries of Rio Negro. The analyses consisted of pH, conductivity, and dissolved organic (DOC) measurements, as well as plasma source mass spectrometry (ICP-MS). Factor analysis revealed three factors, which explained 94% of the total variance. A plot of factor scores presented a cluster containing mostly samples from the Rio Negro Basin. Ultrafiltration tests confirmed that organics from the Rio Negro have higher molecular mass than in the Amazon, and that some metals are associated with these compounds. Heavy rare-earth elements (REE) are enriched relative to light REE in the dissolved fraction of most rivers of the Negro Basin; the opposite occurred in suspended matter. |
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A contribution to the chemical characterization of rivers in the Rio Negro Basin, BrazilAmazoniaRio Negro (Brazil)blackwater riversmultivariate analysisrare-earth elementsWater samples were collected in Middle Amazonia from the Amazon River, Rio Negro and 17 tributaries of Rio Negro. The analyses consisted of pH, conductivity, and dissolved organic (DOC) measurements, as well as plasma source mass spectrometry (ICP-MS). Factor analysis revealed three factors, which explained 94% of the total variance. A plot of factor scores presented a cluster containing mostly samples from the Rio Negro Basin. Ultrafiltration tests confirmed that organics from the Rio Negro have higher molecular mass than in the Amazon, and that some metals are associated with these compounds. Heavy rare-earth elements (REE) are enriched relative to light REE in the dissolved fraction of most rivers of the Negro Basin; the opposite occurred in suspended matter.Sociedade Brasileira de Química2000-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015Journal of the Brazilian Chemical Society v.11 n.3 2000reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532000000300015info:eu-repo/semantics/openAccessKüchler,Ivo L.Miekeley,NorbertForsberg,Bruce R.eng2000-11-06T00:00:00Zoai:scielo:S0103-50532000000300015Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2000-11-06T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
title |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
spellingShingle |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil Küchler,Ivo L. Amazonia Rio Negro (Brazil) blackwater rivers multivariate analysis rare-earth elements |
title_short |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
title_full |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
title_fullStr |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
title_full_unstemmed |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
title_sort |
A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil |
author |
Küchler,Ivo L. |
author_facet |
Küchler,Ivo L. Miekeley,Norbert Forsberg,Bruce R. |
author_role |
author |
author2 |
Miekeley,Norbert Forsberg,Bruce R. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Küchler,Ivo L. Miekeley,Norbert Forsberg,Bruce R. |
dc.subject.por.fl_str_mv |
Amazonia Rio Negro (Brazil) blackwater rivers multivariate analysis rare-earth elements |
topic |
Amazonia Rio Negro (Brazil) blackwater rivers multivariate analysis rare-earth elements |
description |
Water samples were collected in Middle Amazonia from the Amazon River, Rio Negro and 17 tributaries of Rio Negro. The analyses consisted of pH, conductivity, and dissolved organic (DOC) measurements, as well as plasma source mass spectrometry (ICP-MS). Factor analysis revealed three factors, which explained 94% of the total variance. A plot of factor scores presented a cluster containing mostly samples from the Rio Negro Basin. Ultrafiltration tests confirmed that organics from the Rio Negro have higher molecular mass than in the Amazon, and that some metals are associated with these compounds. Heavy rare-earth elements (REE) are enriched relative to light REE in the dissolved fraction of most rivers of the Negro Basin; the opposite occurred in suspended matter. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532000000300015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.11 n.3 2000 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
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1750318164131971072 |