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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 02576naa 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 : 12 | |
| 1. |  | BARRETO, R. C.; MADARI, B. E.; MADDOCK, J. E. L.; FRANCHINI, J. C.; TORRES, E.; MACHADO, P. L. O. A. Estoque de carbono e emissão de CO2 em agregados do solo sob diferentes sistemas de plantio e floresta em um Latossolo Vermelho Eutroférrico - Londrina, PR. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 30., 2005, Recife. Solos: sustentabilidade e qualidade ambiental. Recife: Sociedade Brasileira de Ciência do Solo, 2005. 4 p. 1 CD-ROM. Seção: Manejo e Conservação do Solo e da Água.| Biblioteca(s): Embrapa Soja. |
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| 3. | | SANTOS, M. B. P. dos; NOGUEIRA, S. R. A.; MADDOCK, J. E. L.; MACEDO, J. R. de. Relationships between simultaneous methane, nitrous oxide and carbon dioxide fluxes and surface soil humidity and temperature in the Mata Atlântica Subtropical Forest, Brazil. In: LACERDA, L. D.; SANTELLI, R. E.; DUURSMA, E.; ABRÃO, J. J. (Ed.). Environmental geochemistry in tropical and subtropical environments. Berlin: Springer-Verlag, 2004. Chap. 4, p. 29-36.| Biblioteca(s): Embrapa Solos. |
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| 4. | | MADDOCK, J. E. L.; BREFIN, M. de L. M. dos S.; BARRETO, R. C.; ALMEIDA, A. M. Tempo de permanência do carbono em solos, em função da cobertura vegetal. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 17., 2008, Rio de Janeiro. Manejo e conservação do solo e da água no contexto das mudanças ambientais. Rio de Janeiro: SBCS: Embrapa Solos: Embrapa Agrobiologia, 2008. (Embrapa Solos. Documentos, 101). 3 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 5. | | SOARES, R.; MADDOCK, J. E. L.; CAMPOS, D. V. B. de; MADARI, B. E.; MACHADO, P. L. O. de A.; SANTELLI, R. E. Avaliação da estabilidade de agregados em marcadores ambientais terrestres do Antropoceno submetidos a diferentes períodos de pousio. Revista Virtual de Química, v. 10, n. 6, p. 1693-1718, nov./dez. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Solos. |
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| 6. | | SOARES, R.; SANTOS, M. C. B.; MADDOCK, J. E. L.; MACHADO, W. T. V.; BERTOLINO, L. C.; CAMPOS, D. V. B. de; FREIRE, A. S.; SANTELLI, R. E. Avaliação do risco ambiental e comportamento geoquímico de metais em área impactada por resíduos industriais em Queimados (RJ). Revista Virtual de Química, Niterói, v. 9, n. 5, p. 2151-2176, set./out. 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Solos. |
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| 7. | | SOARES, R.; SANTOS, M. C. B.; MADDOCK, J. E. L.; BERTOLINO, L. C.; SANTELLI, R. E.; CAMPOS, D. V. B. de. Água-régia como extrator alternativo para o diagnóstico ambiental de áreas impactadas por resíduos industriais: estudo de caso Centres (Queimados, RJ). Engenharia Sanitária e Ambiental, v. 23, n. 5, p. 995-1000, set./out. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Solos. |
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| 8. | | BARRETO, R. C.; MADARI, B. E.; MADDOCK, J. E. L.; MACHADO, P. L. O. de A.; TORRES, E.; FRANCHINI, J.; COSTA, A. R. The impact of soil management on aggregation, carbon stabilization and carbon loss as CO2 in the surface layer of a Rhodic Ferralsol in Southern Brazil. Agriculture, Ecosystems and Environment, Amsterdam, v. 132, n. 3/4, p. 243-251, Aug. 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Soja. |
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| 9. | | SILVA, M. S. C. da; SILVA, E. M. R. da; MADDOCK, J. E. L.; SAGGIN JÚNIOR, O. J.; FEIDEN, A.; MATTOS, C. Características químicas e indicadores microbiológicos do solo em sistemas agroflorestais, monocultura de mandioca e mata secundária. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 30., 2005, Recife. Solos: sustentabilidade e qualidade ambiental. Recife: Sociedade Brasileira de Ciência do Solo, 2005. 4 p. 1 CD-ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| 10. | | SOARES, R.; MADDOCK, J. E. L.; CAMPOS, D. V. B. de; MADARI, B. E.; MACHADO, P. L. O. de A.; SANTELLI, R. E. O papel das Terras Pretas de Índio no Antropoceno. Revista Virtual de Química, v. 10, n. 6, p. 1659-1692, nov./dez. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Solos. |
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| 11. | | SOARES, R.; MADDOCK, J. E. L.; CAMPOS, D. V. B. de; MADARI, B. E.; MACHADO, P. L. O. de A.; SANTELLI, R. E. Seriam as Terras Pretas de índio marcadores ambientais da Idade Meghalayan ou da Época do Antropoceno? In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE QUÍMICA, 42., 2019, Joinville. Eixos mobilizadores em Química: programa e resumos. São Paulo: Sociedade Brasileira de Química, 2019.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Solos. |
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| Registros recuperados : 12 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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