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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/10/2021 |
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Data da última atualização: |
13/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
TORKAMAN, P.; VEIGA, M. M.; LIMA, L. R. P. de ANDRADE; OLIVEIRA, L. A. de; MOTTA, J. da S.; JESUS, J. L. de; LAVKULICH, L. M. |
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Afiliação: |
P. TORKAMAN, University of British Columbia; M. M. VEIGA, University of British Columbia; L. R. P. DE ANDRADE LIMA, UFBA; LUCIANA ALVES DE OLIVEIRA, CNPMF; JOSELITO DA SILVA MOTTA, CNPMF; JACIENE LOPES DE JESUS, CNPMF; L. M. LAVKULICH, University of British Columbia. |
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Título: |
Leaching gold with cassava: an option to eliminate mercury use in artisanal gold mining. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Cleaner Production, v. 311, 2021. |
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ISSN: |
0959-6526 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT Mercury pollution from artisanal gold mining causes severe environmental and health problems, especially to operators and people living around the processing facilities. Over 2000 tonnes/a of mercury is released to the environment by the artisanal miners which is the largest man-made source of mercury pollution. Here we present a novel method using a local plant, cassava, common in many artisanal mining areas in Latin America, Africa, and Asia, to dissolve gold from ores. In our experiments, we used a liquid by-product of cassava flour manufacturing, ?manipueira? to leach gold from the gold ore. It contains hydrogen cyanide, generating from the hydrolysis of cyanogenic glycosides in the cassava plant. The results were very promising to replace the use of mercury, as approximately 50% of the gold content was extracted from the ore in 24 h. |
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Thesagro: |
Mandioca. |
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Thesaurus Nal: |
Cassava. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01515naa a2200229 a 4500
001 2135261
005 2021-10-13
008 2021 bl uuuu u00u1 u #d
022 $a0959-6526
100 1 $aTORKAMAN, P.
245 $aLeaching gold with cassava$ban option to eliminate mercury use in artisanal gold mining.$h[electronic resource]
260 $c2021
520 $aABSTRACT Mercury pollution from artisanal gold mining causes severe environmental and health problems, especially to operators and people living around the processing facilities. Over 2000 tonnes/a of mercury is released to the environment by the artisanal miners which is the largest man-made source of mercury pollution. Here we present a novel method using a local plant, cassava, common in many artisanal mining areas in Latin America, Africa, and Asia, to dissolve gold from ores. In our experiments, we used a liquid by-product of cassava flour manufacturing, ?manipueira? to leach gold from the gold ore. It contains hydrogen cyanide, generating from the hydrolysis of cyanogenic glycosides in the cassava plant. The results were very promising to replace the use of mercury, as approximately 50% of the gold content was extracted from the ore in 24 h.
650 $aCassava
650 $aMandioca
700 1 $aVEIGA, M. M.
700 1 $aLIMA, L. R. P. de ANDRADE
700 1 $aOLIVEIRA, L. A. de
700 1 $aMOTTA, J. da S.
700 1 $aJESUS, J. L. de
700 1 $aLAVKULICH, L. M.
773 $tJournal of Cleaner Production$gv. 311, 2021.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
07/11/2022 |
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Data da última atualização: |
08/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
FERNANDES-CARVALHO-DE-ANDRADE, D.; RUSCHEL, A. R.; SCHWARTZ, G.; PEREIRA-DE-CARVALHO, J. O.; VASCONCELLOS-GAMA, J. R. |
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Afiliação: |
DÁRLISON FERNANDES-CARVALHO-DE-ANDRADE, INSTITUTO CHICO MENDES DE CONSERVAÇÃO DA BIODIVERSIDADE; ADEMIR ROBERTO RUSCHEL, CPATU; GUSTAVO SCHWARTZ, CPATU; JOÃO OLEGÁRIO PEREIRA-DE-CARVALHO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; JOÃO RICARDO VASCONCELLOS-GAMA, UNIVERSIDADE FEDERAL DO OESTE DO PARÁ. |
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Título: |
Persistent fire effect on forest dynamics and species composition of an old-growth tropical forest. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Forest Systems, v. 30, n. 3, e009, 2021. |
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DOI: |
https://doi.org/10.5424/fs/2021303-16791 |
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Idioma: |
Inglês |
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Conteúdo: |
Aim of study: To assess structure, recruitment and mortality rates of tree species over almost three decades, 14 years before and 15 years after a forest fire. Materials and methods: All trees ≥ 5 cm in DBH were identified and measured in 12 permanent plots (50 m x 50 m), in 1983, 1987, 1989, 1995, 2008, and 2012 of a dense ombrophilous forest in Eastern Amazon, Brazil. The analyses were carried out including all sampled species and their ecological groups: shade-tolerant, light-demanding, and pioneer species. Treatments were compared through a Linear Mixed Effect Model. Main results: The 15-year post-fire period is not enough for the old-growth tropical forest to recover its pre-fire conditions of recruitment and mortality rates. The post-fire recruitment and mortality rates increased, mainly the recruitment of pioneer species (p-value < 0.05). Research highlights: In a period of 15 years after the occurrence of a surface fire, the old-growth tropical forest still has high recruitment rates of shade-tolerant and light-demanding species and high incidence of pioneer species, confirming the persistent fire effects on forest dynamics and species composition in this ecosystem |
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Palavras-Chave: |
Dinâmica das espécies; Espécies arbóreas pioneiras; Floresta amazônica; Floresta Nacional do Tapajós; Resiliência florestal. |
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Thesagro: |
Floresta Tropical. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148094/1/16791-Article-Text-76106-1-10-20211116.pdf
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Marc: |
LEADER 02077naa a2200265 a 4500
001 2148094
005 2022-11-08
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5424/fs/2021303-16791$2DOI
100 1 $aFERNANDES-CARVALHO-DE-ANDRADE, D.
245 $aPersistent fire effect on forest dynamics and species composition of an old-growth tropical forest.$h[electronic resource]
260 $c2021
520 $aAim of study: To assess structure, recruitment and mortality rates of tree species over almost three decades, 14 years before and 15 years after a forest fire. Materials and methods: All trees ≥ 5 cm in DBH were identified and measured in 12 permanent plots (50 m x 50 m), in 1983, 1987, 1989, 1995, 2008, and 2012 of a dense ombrophilous forest in Eastern Amazon, Brazil. The analyses were carried out including all sampled species and their ecological groups: shade-tolerant, light-demanding, and pioneer species. Treatments were compared through a Linear Mixed Effect Model. Main results: The 15-year post-fire period is not enough for the old-growth tropical forest to recover its pre-fire conditions of recruitment and mortality rates. The post-fire recruitment and mortality rates increased, mainly the recruitment of pioneer species (p-value < 0.05). Research highlights: In a period of 15 years after the occurrence of a surface fire, the old-growth tropical forest still has high recruitment rates of shade-tolerant and light-demanding species and high incidence of pioneer species, confirming the persistent fire effects on forest dynamics and species composition in this ecosystem
650 $aAmazonia
650 $aFloresta Tropical
653 $aDinâmica das espécies
653 $aEspécies arbóreas pioneiras
653 $aFloresta amazônica
653 $aFloresta Nacional do Tapajós
653 $aResiliência florestal
700 1 $aRUSCHEL, A. R.
700 1 $aSCHWARTZ, G.
700 1 $aPEREIRA-DE-CARVALHO, J. O.
700 1 $aVASCONCELLOS-GAMA, J. R.
773 $tForest Systems$gv. 30, n. 3, e009, 2021.
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