Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449

Detalhes bibliográficos
Autor(a) principal: Silva, Fábio Moreira da
Data de Publicação: 2009
Outros Autores: Ramos, Fabrícia Maribondo da Silva, Costa, Antonio Carlos Augusto da, Tavares, Célia Regina Granhen
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/449
Resumo: The present work assessed the effect of the pH in the bioleaching of Cr and other metals from tannery sludge with stage separation of biologic oxidation of elemental sulfur and leaching of solid waste. The concentration of elemental sulfur was 5 g L-1. The final bioleaching pH ranged from 3.0 to 1.0. The concentration of sludge solids was 100 g L-1 and the temperatures were 298.15 and 308.15 K. The leaching extractions of Al, Cr and Zn increased at lower final pH and the leaching extraction of Ca decreased in this condition. The maximum extraction of Cr was 70.11% at sludge solids concentration of 100 g L-1, final pH 1.0 and temperature of 298.15 K. The fraction of Cr bound to Fe and Mn oxides was more affected by changes at final pH than others fractions. The mass ratio of metals and Cr decreased at lower final pH. The concentration of Cr leached from the tannery sludge after the bioleaching at final pH of 1.0 was reduced to satisfactory values.
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spelling Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449Biolixiviação de metais do lodo de curtume em duas etapas: influência do pH - DOI: 10.4025/actascitechnol.v31i2.449bioleachingelemental sulfurChromiumtannery sludgebiolixiviaçãoenxofre elementarCromolodo de curtumeThe present work assessed the effect of the pH in the bioleaching of Cr and other metals from tannery sludge with stage separation of biologic oxidation of elemental sulfur and leaching of solid waste. The concentration of elemental sulfur was 5 g L-1. The final bioleaching pH ranged from 3.0 to 1.0. The concentration of sludge solids was 100 g L-1 and the temperatures were 298.15 and 308.15 K. The leaching extractions of Al, Cr and Zn increased at lower final pH and the leaching extraction of Ca decreased in this condition. The maximum extraction of Cr was 70.11% at sludge solids concentration of 100 g L-1, final pH 1.0 and temperature of 298.15 K. The fraction of Cr bound to Fe and Mn oxides was more affected by changes at final pH than others fractions. The mass ratio of metals and Cr decreased at lower final pH. The concentration of Cr leached from the tannery sludge after the bioleaching at final pH of 1.0 was reduced to satisfactory values.O presente trabalho avaliou a influência do pH final sobre a biolixiviação de Cr e outros metais do lodo de curtume, utilizando um sistema com a separação das etapas de oxidação biológica do enxofre elementar e de lixiviação do resíduo. A concentração de enxofre elementar foi de 5 g L-1. O pH final de biolixiviação variou de 3,0 a 1,0. A concentração de sólidos do lodo de curtume lixiviado foi de 100 g L-1 e as temperaturas foram de 298,15 e 308,15 K. As porcentagens de extração de Al, Cr e Zn tiveram acréscimos para menores valores de pH final, enquanto as de Ca decresceram nessas condições. A extração máxima de Cr foi de 70,11% em concentração de sólidos do lodo de 100 g L-1, pH final de 1,0 e temperatura de 298,15 K. A fração de Cr ligada aos óxidos de Fe e Mn teve maior variação no teor do metal do que as outras frações, pelas mudanças de pH final. A razão em massa dos metais e do Cr decresceu para menores valores de pH final. A concentração de Cr lixiviado do lodo de curtume, após a biolixiviação em pH final 1,0, foi reduzida a valores satisfatórios.Universidade Estadual De Maringá2009-06-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/44910.4025/actascitechnol.v31i2.449Acta Scientiarum. Technology; Vol 31 No 2 (2009); 167-173Acta Scientiarum. Technology; v. 31 n. 2 (2009); 167-1731806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/449/449Silva, Fábio Moreira daRamos, Fabrícia Maribondo da SilvaCosta, Antonio Carlos Augusto daTavares, Célia Regina Granheninfo:eu-repo/semantics/openAccess2024-05-17T13:02:27Zoai:periodicos.uem.br/ojs:article/449Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:27Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
Biolixiviação de metais do lodo de curtume em duas etapas: influência do pH - DOI: 10.4025/actascitechnol.v31i2.449
title Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
spellingShingle Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
Silva, Fábio Moreira da
bioleaching
elemental sulfur
Chromium
tannery sludge
biolixiviação
enxofre elementar
Cromo
lodo de curtume
title_short Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
title_full Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
title_fullStr Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
title_full_unstemmed Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
title_sort Bioleaching of metals from tannery sludge in two stages: effect of pH - DOI: 10.4025/actascitechnol.v31i2.449
author Silva, Fábio Moreira da
author_facet Silva, Fábio Moreira da
Ramos, Fabrícia Maribondo da Silva
Costa, Antonio Carlos Augusto da
Tavares, Célia Regina Granhen
author_role author
author2 Ramos, Fabrícia Maribondo da Silva
Costa, Antonio Carlos Augusto da
Tavares, Célia Regina Granhen
author2_role author
author
author
dc.contributor.author.fl_str_mv Silva, Fábio Moreira da
Ramos, Fabrícia Maribondo da Silva
Costa, Antonio Carlos Augusto da
Tavares, Célia Regina Granhen
dc.subject.por.fl_str_mv bioleaching
elemental sulfur
Chromium
tannery sludge
biolixiviação
enxofre elementar
Cromo
lodo de curtume
topic bioleaching
elemental sulfur
Chromium
tannery sludge
biolixiviação
enxofre elementar
Cromo
lodo de curtume
description The present work assessed the effect of the pH in the bioleaching of Cr and other metals from tannery sludge with stage separation of biologic oxidation of elemental sulfur and leaching of solid waste. The concentration of elemental sulfur was 5 g L-1. The final bioleaching pH ranged from 3.0 to 1.0. The concentration of sludge solids was 100 g L-1 and the temperatures were 298.15 and 308.15 K. The leaching extractions of Al, Cr and Zn increased at lower final pH and the leaching extraction of Ca decreased in this condition. The maximum extraction of Cr was 70.11% at sludge solids concentration of 100 g L-1, final pH 1.0 and temperature of 298.15 K. The fraction of Cr bound to Fe and Mn oxides was more affected by changes at final pH than others fractions. The mass ratio of metals and Cr decreased at lower final pH. The concentration of Cr leached from the tannery sludge after the bioleaching at final pH of 1.0 was reduced to satisfactory values.
publishDate 2009
dc.date.none.fl_str_mv 2009-06-17
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/449
10.4025/actascitechnol.v31i2.449
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/449
identifier_str_mv 10.4025/actascitechnol.v31i2.449
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/449/449
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 31 No 2 (2009); 167-173
Acta Scientiarum. Technology; v. 31 n. 2 (2009); 167-173
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
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