Artigo

A Contribution to the Chemical Characterization of Rivers in the Rio Negro Basin, Brazil

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 e...

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Autor principal: Küchler, Ivo Lewin
Outros Autores: Miekeley, Norbert F., Forsberg, Bruce Rider
Grau: Artigo
Idioma: English
Publicado em: Journal of the Brazilian Chemical Society 2020
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/16429
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spelling oai:repositorio:1-16429 A Contribution to the Chemical Characterization of Rivers in the Rio Negro Basin, Brazil Küchler, Ivo Lewin Miekeley, Norbert F. Forsberg, Bruce Rider 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. 2020-06-05T17:59:40Z 2020-06-05T17:59:40Z 2000 Artigo https://repositorio.inpa.gov.br/handle/1/16429 10.1590/S0103-50532000000300015 en Volume 11, Número 3, Pags. 286-292 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Journal of the Brazilian Chemical Society
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
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.
format Artigo
author Küchler, Ivo Lewin
spellingShingle Küchler, Ivo Lewin
A Contribution to the Chemical Characterization of Rivers in the Rio Negro Basin, Brazil
author2 Miekeley, Norbert F.
Forsberg, Bruce Rider
author2Str Miekeley, Norbert F.
Forsberg, Bruce Rider
title A Contribution to the Chemical Characterization of Rivers in the Rio Negro Basin, Brazil
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 contribution to the chemical characterization of rivers in the rio negro basin, brazil
publisher Journal of the Brazilian Chemical Society
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/16429
_version_ 1787142943852724224
score 11.755432

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