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dc.creatorLEMOS, Vanda Porpino-
dc.creatorCOSTA, Marcondes Lima da-
dc.creatorLEMOS, Ronaldo Lima-
dc.creatorFARIA, Mario Sergio Gomes de-
dc.date.accessioned2014-07-09T11:56:09Z-
dc.date.available2014-07-09T11:56:09Z-
dc.date.issued2007-02-
dc.identifier.citationLEMOS, Vanda Porpino et al. Vivianite and siderite in lateritic iron crust: an example of bioreduction. Química Nova, São Paulo, v. 30, n. 1, p. 36-40, jan./fev. 2007. Disponível em: <http://www.scielo.br/pdf/qn/v30n1/07.pdf>. Acesso em: 28 fev. 2014. <http://dx.doi.org/10.1590/S0100-40422007000100008>.pt_BR
dc.identifier.issn0100-4042-
dc.identifier.urihttp://repositorio.ufpa.br/jspui/handle/2011/5284-
dc.description.abstractLateritic iron crust (LIC) samples from Padauari (AM) were analysed by XRD, optical microscopy and SEM-EDS. The equilibrium of iron minerals (IM) was studied using Eh-pH diagram. It was shown that the minerals of the LIC are goethite (a-FeOOH), vivianite [Fe3(PO4)2.8H2O] and siderite (FeCO3). Carbonate grains are a solid solution of FeCO3-MnCO3. The LIC presents textures and structures of dissolution of IM. The siderite and vivianite are stable from Eh =-0.3 to 0.0 V and pH=5.0-7.5. These results indicate that vivianite and siderite are products of bioreduction through biogenic dissolution of IM, the new conditions of ecosystems of the Amazon region.pt_BR
dc.description.provenanceSubmitted by Edisangela Bastos (edisangela@ufpa.br) on 2014-07-03T21:52:07Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Artigo_VivianiteSideriteLateritic.pdf: 509546 bytes, checksum: 5f1a442ccec9581ba9372b945c2ecb88 (MD5)en
dc.description.provenanceApproved for entry into archive by Albirene Aires (albireneufpa@gmail.com) on 2014-07-09T11:56:09Z (GMT) No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Artigo_VivianiteSideriteLateritic.pdf: 509546 bytes, checksum: 5f1a442ccec9581ba9372b945c2ecb88 (MD5)en
dc.description.provenanceMade available in DSpace on 2014-07-09T11:56:09Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Artigo_VivianiteSideriteLateritic.pdf: 509546 bytes, checksum: 5f1a442ccec9581ba9372b945c2ecb88 (MD5) Previous issue date: 2007-02en
dc.language.isoengpt_BR
dc.rightsAcesso Aberto-
dc.subjectMinérios de ferropt_BR
dc.subjectVivianitept_BR
dc.subjectSideritapt_BR
dc.subjectFerro lateríticopt_BR
dc.subjectBioreduçãopt_BR
dc.subjectDifração de raio Xpt_BR
dc.subjectMicroscopia óticapt_BR
dc.subjectGoetitept_BR
dc.subjectAmazônia brasileirapt_BR
dc.titleVivianite and siderite in lateritic iron crust: an example of bioreductionpt_BR
dc.typeArtigo de Periódicopt_BR
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