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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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2000-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015 |
| _version_ | 1819105700628922368 |
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| author | Küchler Ivo L. Miekeley Norbert Forsberg Bruce R. |
| author_facet | Küchler Ivo L. Miekeley Norbert Forsberg Bruce R. |
| author_sort | Küchler Ivo L. |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-22T02:26:25Z |
| format | Article |
| id | doaj.art-80ab68d0be44401a944c3c2d43dea2aa |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-12-22T02:26:25Z |
| publishDate | 2000-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-80ab68d0be44401a944c3c2d43dea2aa2022-12-21T18:41:59ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50532000-01-01113286292A contribution to the chemical characterization of rivers in the Rio Negro Basin, BrazilKüchler Ivo L.Miekeley NorbertForsberg Bruce R.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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015AmazoniaRio Negro (Brazil)blackwater riversmultivariate analysisrare-earth elements |
| spellingShingle | Küchler Ivo L. Miekeley Norbert Forsberg Bruce R. A contribution to the chemical characterization of rivers in the Rio Negro Basin, Brazil Journal of the Brazilian Chemical Society Amazonia Rio Negro (Brazil) blackwater rivers multivariate analysis rare-earth elements |
| title | 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_short | 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 |
| topic | Amazonia Rio Negro (Brazil) blackwater rivers multivariate analysis rare-earth elements |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300015 |
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