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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
21/11/2000 |
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Data da última atualização: |
31/03/2017 |
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Autoria: |
RODRIGUES FILHO, S.; MADDOCK, J. E. L. |
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Afiliação: |
CETEM/CNPq. Centro de Tecnologia Mineral (Rio de Janeiro, RJ); Universidade Federal Fluminense. Departamento de Geoquimica. Instituto de Quimica (Niteroi, RJ). |
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Título: |
Mercury pollution in two gold mining areas of the Brazilian Amazon. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Journal of Geochemical Exploration, v.58, p.231-240, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
Gold has been exploited intensively in the Brazilian Amazon during the past fifteen years using garimpo methods (small-scale gold mining). In this study, two gold mining areas were investigated, the municipalities of Pocone and Alta Floresta located in the state of Mato Grosso, Central Brazil. The elemental mercury (Hg) used in amalgamating the gold, the final stage of the ore dressing process, has caused abnormal Hg concentrations in waterways. This has occurred principally in the Amazon region, where most of the ore prospected is alluvial. Background levels of metals were determined by analyzing sediments and soils located upstream of the anthropogenic inputs and unaffected by mining activities. The study aimed to evaluate the pollution level in sediments and soils, taking into account drainage waters directly affected by gold mining. Geoaccumulation indexes (Igeo) of Hg in sediments from both study areas were used to assesses the pollution level in the aquatic environment. The geoaccumulation indexes of Hg in sediments of the Bento Gomes River in Pocone indicate a relatively high degree of pollution at some sites, even reaching class 4 (1.8 mg/kg). However, when the river reaches the Pantanal swamps, Hg concentrations drog considerably to 0.30 mg/kg. This drop seems to be due to accumulation of metals in the sediments of a lake (sampling site PG-24), which retains most of the sediments transported by the Bento Gomes River. Accumulation of metals in the lake also occurred for Cu, Pb, Zn, Fe and Mn. In the region of Alta Floresta, total Hg concentrations in sediments of the Teles Pires River were studied in the grain size fractions < 74 um and > 74 um. Hg concentrations in bottom sediments of this river were higher than those found in the Pocone region, with increases of 1.5 to 30 times the background, and thus reaching an Igeo up to class 5. MenosGold has been exploited intensively in the Brazilian Amazon during the past fifteen years using garimpo methods (small-scale gold mining). In this study, two gold mining areas were investigated, the municipalities of Pocone and Alta Floresta located in the state of Mato Grosso, Central Brazil. The elemental mercury (Hg) used in amalgamating the gold, the final stage of the ore dressing process, has caused abnormal Hg concentrations in waterways. This has occurred principally in the Amazon region, where most of the ore prospected is alluvial. Background levels of metals were determined by analyzing sediments and soils located upstream of the anthropogenic inputs and unaffected by mining activities. The study aimed to evaluate the pollution level in sediments and soils, taking into account drainage waters directly affected by gold mining. Geoaccumulation indexes (Igeo) of Hg in sediments from both study areas were used to assesses the pollution level in the aquatic environment. The geoaccumulation indexes of Hg in sediments of the Bento Gomes River in Pocone indicate a relatively high degree of pollution at some sites, even reaching class 4 (1.8 mg/kg). However, when the river reaches the Pantanal swamps, Hg concentrations drog considerably to 0.30 mg/kg. This drop seems to be due to accumulation of metals in the sediments of a lake (sampling site PG-24), which retains most of the sediments transported by the Bento Gomes River. Accumulation of metals in the lake also occurred ... Mostrar Tudo |
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Palavras-Chave: |
Amazon; Brasil; Gold mining; Mercury pollution; Mina; Ouro; Riverine sediments. |
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Thesagro: |
Mercúrio; Poluição; Sedimento. |
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Thesaurus Nal: |
Amazonia; Brazil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02580naa a2200277 a 4500
001 1804291
005 2017-03-31
008 1997 bl --- 0-- u #d
100 1 $aRODRIGUES FILHO, S.
245 $aMercury pollution in two gold mining areas of the Brazilian Amazon.
260 $c1997
520 $aGold has been exploited intensively in the Brazilian Amazon during the past fifteen years using garimpo methods (small-scale gold mining). In this study, two gold mining areas were investigated, the municipalities of Pocone and Alta Floresta located in the state of Mato Grosso, Central Brazil. The elemental mercury (Hg) used in amalgamating the gold, the final stage of the ore dressing process, has caused abnormal Hg concentrations in waterways. This has occurred principally in the Amazon region, where most of the ore prospected is alluvial. Background levels of metals were determined by analyzing sediments and soils located upstream of the anthropogenic inputs and unaffected by mining activities. The study aimed to evaluate the pollution level in sediments and soils, taking into account drainage waters directly affected by gold mining. Geoaccumulation indexes (Igeo) of Hg in sediments from both study areas were used to assesses the pollution level in the aquatic environment. The geoaccumulation indexes of Hg in sediments of the Bento Gomes River in Pocone indicate a relatively high degree of pollution at some sites, even reaching class 4 (1.8 mg/kg). However, when the river reaches the Pantanal swamps, Hg concentrations drog considerably to 0.30 mg/kg. This drop seems to be due to accumulation of metals in the sediments of a lake (sampling site PG-24), which retains most of the sediments transported by the Bento Gomes River. Accumulation of metals in the lake also occurred for Cu, Pb, Zn, Fe and Mn. In the region of Alta Floresta, total Hg concentrations in sediments of the Teles Pires River were studied in the grain size fractions < 74 um and > 74 um. Hg concentrations in bottom sediments of this river were higher than those found in the Pocone region, with increases of 1.5 to 30 times the background, and thus reaching an Igeo up to class 5.
650 $aAmazonia
650 $aBrazil
650 $aMercúrio
650 $aPoluição
650 $aSedimento
653 $aAmazon
653 $aBrasil
653 $aGold mining
653 $aMercury pollution
653 $aMina
653 $aOuro
653 $aRiverine sediments
700 1 $aMADDOCK, J. E. L.
773 $tJournal of Geochemical Exploration$gv.58, p.231-240, 1997.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 8 | |
| 1. |  | CARDOSO, E.; RODRIGUES-FILHO, S.; COSTA, J.; GUEDES, M. Atividade de caça em uma comunidade na reserva extrativista do Rio Cajari, Amapá. In: CONGRESSO INTERNACIONAL DE ECOLOGIA, 1.; CONGRESSO DE ECOLOGIA DO BRASIL, 11., 2013, Porto Seguro. Ecologia e Gestão Ambiental: anais. Porto Seguro: SEB, 2013.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amapá. |
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| 3. | | REIS, J. C. dos; KAMOI, M. Y. T.; MICHETTI, M.; RODRIGUES, R. de A. R.; GARRETT, R.; VALENTIM, J. F.; RODRIGUES FILHO, S. Emissão de CO2 e crescimento econômico na Amazônia: a curva ambiental de Kuznets usando um modelo dinâmico de painel de dados. In: ENCONTRO DA ASSOCIAÇÃO NACIONAL DE PÓS-GRADUAÇÃO E PESQUISA EM AMBIENTE E SOCIEDADE, 9., 2019, Brasília, DF. Conexões, democracia e sustentabilidade: anais. Brasília, DF: ANPPAS, 2019. p. 2434-2465. IX ENANPPAS.| Biblioteca(s): Embrapa Solos. |
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| 4. | | REIS, J. C. dos; KAMOI, M. Y. T.; MICHETTI, M.; RODRIGUES, R. de A. R.; GARRETT, R.; VALENTIM, J. F.; RODRIGUES FILHO, S. Emissão de CO2 e crescimento econômico na Amazônia: a curva ambiental de Kuznets usando um modelo dinâmico de painel de dados. In: ENCONTRO DA ASSOCIAÇÃO NACIONAL DE PÓS-GRADUAÇÃO E PESQUISA EM AMBIENTE E SOCIEDADE, 9., 2019, Brasília, DF. Conexões, democracia e sustentabilidade: anais. Brasília, DF: ANPPAS, 2019. p. 2434-2465. IX ENANPPAS.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agrossilvipastoril. |
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| 5. | | ARAUJO, M.; OMETTO, J.; RODRIGUES FILHO, S.; BURSZTYN, M.; LINDOSO, D. P.; LITRE, G.; GAIVIZZO, L.; FERREIRA, J. L.; REIS, R. M.; ASSAD, E. D. The socio-ecological Nexus+ approach used by the Brazilian Research Network on Global Climate Change. Current Opinion in Environmental Sustainability, v. 39, p. 62-70, 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| 6. | | REIS, J. C. dos; KAMOI, M. Y. T.; LATORRACA, D.; CHEN, R. F. F.; MICHETTI, M.; WRUCK, F. J.; GARRETT, R. D.; VALENTIM, J. F.; RODRIGUES, R. de A. R.; RODRIGUES FILHO, S. Assessing the economic viability of integrated crop-livestock systems in Mato Grosso, Brazil. Renewable Agriculture and Food Systems, v. 35, n. 6, p. 631-642, 2020.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Acre; Embrapa Agrossilvipastoril; Embrapa Solos. |
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| 7. | | REIS, J. C. dos; RODRIGUES, G. S.; BARROS, I. de; RODRIGUES, R. de A. R.; GARRETT, R. D.; VALENTIM, J. F.; KAMOI, M. Y. T.; MICHETTI, M.; WRUCK, F. J.; RODRIGUES-FILHO, S. Fuzzy logic indicators for the assessment of farming sustainability strategies in a tropical agricultural frontier. Agronomy for Sustainable Development, v. 43, 2023. 18 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Acre; Embrapa Cerrados; Embrapa Gado de Leite; Embrapa Meio Ambiente. |
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| 8. | | REIS, J. C. dos; RODRIGUES, G. S.; BARROS, I. de; RODRIGUES, R. de A. R.; GARRETT, R. D.; VALENTIM, J. F.; KAMOI, M. Y. T.; MICHETTI, M.; WRUCK, F. J.; RODRIGUES FILHO, S.; PIMENTEL, P. E. O.; SMUKLER, S. Integrated crop-livestock systems: a sustainable land-use alternative for food production in the Brazilian Cerrado and Amazon. Journal of Cleaner Production, v. 283, 124580, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Acre; Embrapa Agrossilvipastoril; Embrapa Gado de Leite; Embrapa Meio Ambiente; Embrapa Solos. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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