Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans

Detalhes bibliográficos
Autor(a) principal: Zhao, Kaile
Data de Publicação: 2017
Outros Autores: Gu, Guohua, Qiu, Guanzhou, Wang, Xiaohui
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Bioscience journal (Online)
Texto Completo: https://seer.ufu.br/index.php/biosciencejournal/article/view/33824
Resumo: Precipitation of jarosite is a very important phenomenon that is observed in the bioleaching of pyrrhotite by Acidthiobacillus ferrooxidans (A. ferrooxidans). Jarosite is a major secondary mineral formed in acid supergene environment by oxidation of metal sulphide. The formation of jarosite could decrease leached percentage. The Eh-pH diagram of FeS1.12-H2O showed that the thermodynamic parameters of the jarosite were exists steadily on Eh=360～800, pH=2.8～5, and the results of pH condition test is consonant with the conclusions of thermodynamic analysis. By means of XRD and SEM, it could indicate that full propagation of A. ferrooxidans in the solution is beneficial to the formation of jarosite and jarosite mediated by bacterial has a better crystalline form than that synthesized by chemical method. This study indicates that pH value and ferrous/ferric iron concentration are key factors affecting the formation of jarosite. Leached percentage is higher when frequency was set more than 2.0. It is crucial to minimize jarosite formation in order to increase factory's efficiency.
id UFU-14_bdb9f7bd9b9c61e0f573532ebdd67691
oai_identifier_str oai:ojs.www.seer.ufu.br:article/33824
network_acronym_str UFU-14
network_name_str Bioscience journal (Online)
repository_id_str
spelling Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans Estudo sobre a jarosita mediada pela biolixiviação da pirrotita usando Acidithiobacillus ferrooxidansPyrrhotiteBioleachingAcidthiobacillus ferrooxidansJarositeBiological SciencesPrecipitation of jarosite is a very important phenomenon that is observed in the bioleaching of pyrrhotite by Acidthiobacillus ferrooxidans (A. ferrooxidans). Jarosite is a major secondary mineral formed in acid supergene environment by oxidation of metal sulphide. The formation of jarosite could decrease leached percentage. The Eh-pH diagram of FeS1.12-H2O showed that the thermodynamic parameters of the jarosite were exists steadily on Eh=360～800, pH=2.8～5, and the results of pH condition test is consonant with the conclusions of thermodynamic analysis. By means of XRD and SEM, it could indicate that full propagation of A. ferrooxidans in the solution is beneficial to the formation of jarosite and jarosite mediated by bacterial has a better crystalline form than that synthesized by chemical method. This study indicates that pH value and ferrous/ferric iron concentration are key factors affecting the formation of jarosite. Leached percentage is higher when frequency was set more than 2.0. It is crucial to minimize jarosite formation in order to increase factory's efficiency.A precipitação de jarosite é um fenômeno muito importante que é observado na biolixiviação da pirrotita por Acidithiobacillus ferrooxidans (A. ferrooxidans). A jarosita é um mineral secundário principal formado no ambiente supergênico ácido pela oxidação do sulfureto do metal. A formação de jarosite pode diminuir a porcentagem de lixiviação. O diagrama de Eh-pH de FeS1.12-H2O mostrou que os parâmetros termodinâmicos da jarosite estavam firmemente presentes em Eh = 360~800, pH = 2.8~5, e os resultados do teste de condição de pH estão em consonância com as conclusões da análise termodinâmica. Por meio de XRD e SEM, pode ser indicado que a propagação completa de A. ferrooxidans na solução é benéfica para a formação de jarosite e jarosite mediada por bactérias tem uma forma cristalina melhor do que a sintetizada por método químico. Este estudo indica que o valor do pH e a concentração de ferro ferroso/férrico são fatores chave que afetam a formação de jarosite. A porcentagem de lixiviação é maior quando a freqüência foi ajustada a mais de 2,0. É crucial para minimizar a formação de jarosite, a fim de aumentar a eficiência dafábrica.EDUFU2017-05-24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/3382410.14393/BJ-v33n3-33824Bioscience Journal ; Vol. 33 No. 3 (2017): May/June; 721-729Bioscience Journal ; v. 33 n. 3 (2017): May./June; 721-7291981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/33824/20335Brazil; ContemporaryCopyright (c) 2017 Kaile Zhao, Guohua Gu, Guanzhou Qiu, Xiaohui Wanghttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessZhao, KaileGu, GuohuaQiu, GuanzhouWang, Xiaohui2022-02-16T02:00:16Zoai:ojs.www.seer.ufu.br:article/33824Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-02-16T02:00:16Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false
dc.title.none.fl_str_mv Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
Estudo sobre a jarosita mediada pela biolixiviação da pirrotita usando Acidithiobacillus ferrooxidans
title Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
spellingShingle Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
Zhao, Kaile
Pyrrhotite
Bioleaching
Acidthiobacillus ferrooxidans
Jarosite
Biological Sciences
title_short Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
title_full Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
title_fullStr Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
title_full_unstemmed Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
title_sort Study on the jarosite mediated by bioleaching of pyrrhotite using Acidthiobacillus ferrooxidans
author Zhao, Kaile
author_facet Zhao, Kaile
Gu, Guohua
Qiu, Guanzhou
Wang, Xiaohui
author_role author
author2 Gu, Guohua
Qiu, Guanzhou
Wang, Xiaohui
author2_role author
author
author
dc.contributor.author.fl_str_mv Zhao, Kaile
Gu, Guohua
Qiu, Guanzhou
Wang, Xiaohui
dc.subject.por.fl_str_mv Pyrrhotite
Bioleaching
Acidthiobacillus ferrooxidans
Jarosite
Biological Sciences
topic Pyrrhotite
Bioleaching
Acidthiobacillus ferrooxidans
Jarosite
Biological Sciences
description Precipitation of jarosite is a very important phenomenon that is observed in the bioleaching of pyrrhotite by Acidthiobacillus ferrooxidans (A. ferrooxidans). Jarosite is a major secondary mineral formed in acid supergene environment by oxidation of metal sulphide. The formation of jarosite could decrease leached percentage. The Eh-pH diagram of FeS1.12-H2O showed that the thermodynamic parameters of the jarosite were exists steadily on Eh=360～800, pH=2.8～5, and the results of pH condition test is consonant with the conclusions of thermodynamic analysis. By means of XRD and SEM, it could indicate that full propagation of A. ferrooxidans in the solution is beneficial to the formation of jarosite and jarosite mediated by bacterial has a better crystalline form than that synthesized by chemical method. This study indicates that pH value and ferrous/ferric iron concentration are key factors affecting the formation of jarosite. Leached percentage is higher when frequency was set more than 2.0. It is crucial to minimize jarosite formation in order to increase factory's efficiency.
publishDate 2017
dc.date.none.fl_str_mv 2017-05-24
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 https://seer.ufu.br/index.php/biosciencejournal/article/view/33824
10.14393/BJ-v33n3-33824
url https://seer.ufu.br/index.php/biosciencejournal/article/view/33824
identifier_str_mv 10.14393/BJ-v33n3-33824
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.ufu.br/index.php/biosciencejournal/article/view/33824/20335
dc.rights.driver.fl_str_mv Copyright (c) 2017 Kaile Zhao, Guohua Gu, Guanzhou Qiu, Xiaohui Wang
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Kaile Zhao, Guohua Gu, Guanzhou Qiu, Xiaohui Wang
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv Brazil; Contemporary
dc.publisher.none.fl_str_mv EDUFU
publisher.none.fl_str_mv EDUFU
dc.source.none.fl_str_mv Bioscience Journal ; Vol. 33 No. 3 (2017): May/June; 721-729
Bioscience Journal ; v. 33 n. 3 (2017): May./June; 721-729
1981-3163
reponame:Bioscience journal (Online)
instname:Universidade Federal de Uberlândia (UFU)
instacron:UFU
instname_str Universidade Federal de Uberlândia (UFU)
instacron_str UFU
institution UFU
reponame_str Bioscience journal (Online)
collection Bioscience journal (Online)
repository.name.fl_str_mv Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)
repository.mail.fl_str_mv biosciencej@ufu.br||
_version_ 1797069076947795968

Registros relacionados