Bacterial removal of iron from bauxite ores: A comparative study using three dissimilatory iron reducing microorganisms

Papassiopi, N; Vaxevanidou, K; Kontogianni, A

dc.contributor.author	Papassiopi, N	en
dc.contributor.author	Vaxevanidou, K	en
dc.contributor.author	Kontogianni, A	en
dc.date.accessioned	2014-03-01T02:45:58Z
dc.date.available	2014-03-01T02:45:58Z
dc.date.issued	2009	en
dc.identifier.issn	10226680	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32496
dc.subject	Bauxites	en
dc.subject	Biobeneficiation	en
dc.subject	Iron reducing bacteria	en
dc.subject.other	Bacterial removal	en
dc.subject.other	Bacterial species	en
dc.subject.other	Biobeneficiation	en
dc.subject.other	Bioreductions	en
dc.subject.other	Chamosite	en
dc.subject.other	Comparative studies	en
dc.subject.other	Diasporic-bauxite	en
dc.subject.other	Facultative anaerobes	en
dc.subject.other	Fe reductions	en
dc.subject.other	Ferrous iron	en
dc.subject.other	Iron reducing bacteria	en
dc.subject.other	Iron removal	en
dc.subject.other	Reductive dissolution	en
dc.subject.other	Shewanella	en
dc.subject.other	Bacteria	en
dc.subject.other	Bacteriology	en
dc.subject.other	Concentration (process)	en
dc.subject.other	Dissolution	en
dc.subject.other	Iron	en
dc.subject.other	Iron compounds	en
dc.subject.other	Iron ores	en
dc.subject.other	Metal analysis	en
dc.subject.other	Minerals	en
dc.subject.other	Oxide minerals	en
dc.subject.other	Metal recovery	en
dc.title	Bacterial removal of iron from bauxite ores: A comparative study using three dissimilatory iron reducing microorganisms	en
heal.type	conferenceItem	en
heal.identifier.primary	10.4028/www.scientific.net/AMR.71-73.505	en
heal.identifier.secondary	http://dx.doi.org/10.4028/www.scientific.net/AMR.71-73.505	en
heal.publicationDate	2009	en
heal.abstract	Bio-beneficiation of ores through iron removal is a common technique, but not yet tested for the case of bauxite. In this study we compared the iron reducing ability of three bacterial species with and without the chelating action of EDTA. Tests were carried out using a diasporic bauxite sample containing 19.3% Fe2?3 in the form of hematite, goethite and chamosite. Reductive dissolution was attempted using three neutrophilic, dissimilatory Fe(III) respirators, i.e. the facultative anaerobes Shewanella putrefaciens and Ferrimonas balearica and the strict anaerobe Desulfuromonas palmitatis. Almost 25% of Fe was reduced by D. palmitatis and S. putrefaciens and 30% by F. balearica in bauxite samples. In the case of S. putrefaciens and F. balearica, Fe(III) reduction took place without addition of EDTA, but most of the biologically produced Fe(II) reprecipitated. The addition of EDTA proved to hinder the bioreduction potential for both S. putrefaciens and F. balearica. On the contrary, D. palmitatis was able to reduce Fe(III) oxides only in the presence of EDTA. Moreover, the presence of EDTA helped maintain biogenic ferrous iron in solution. © (2009) Trans Tech Publications.	en
heal.journalName	Advanced Materials Research	en
dc.identifier.doi	10.4028/www.scientific.net/AMR.71-73.505	en
dc.identifier.volume	71-73	en
dc.identifier.spage	505	en
dc.identifier.epage	508	en