Effectiveness of iron reducing bacteria for the removal of iron from bauxite ores

Papassiopi, N; Vaxevanidou, K; Paspaliaris, I

dc.contributor.author	Papassiopi, N	en
dc.contributor.author	Vaxevanidou, K	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:33:19Z
dc.date.available	2014-03-01T01:33:19Z
dc.date.issued	2010	en
dc.identifier.issn	0892-6875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20373
dc.subject	Bauxites	en
dc.subject	Biobeneficiation	en
dc.subject	Iron reducing bacteria (IRB)	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Biobeneficiation	en
dc.subject.other	Chamosite	en
dc.subject.other	Crystalline goethite	en
dc.subject.other	Crystallinities	en
dc.subject.other	Ferrihydrites	en
dc.subject.other	Iron reducing bacteria	en
dc.subject.other	Bacteria	en
dc.subject.other	Bacteriology	en
dc.subject.other	Biochemistry	en
dc.subject.other	Dissolution	en
dc.subject.other	Hematite	en
dc.subject.other	Iron compounds	en
dc.subject.other	Iron ores	en
dc.subject.other	Minerals	en
dc.subject.other	Oxide minerals	en
dc.subject.other	Extraction	en
dc.title	Effectiveness of iron reducing bacteria for the removal of iron from bauxite ores	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2009.09.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2009.09.005	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Current study investigates the possibility of obtaining the removal of iron from bauxite ores, by exploiting the metabolism of iron reducing microorganisms. The experiments were carried out using the microorganism Desulfuromonas palmitatis. The effectiveness of the treatment was evaluated on six different bauxite samples, containing the alumina oxide in the form of diaspore or boehmite. The Fe2O3 content of the samples varied between 16.3% and 22.3% and occurred mainly in the form of goethite or hematite, with one sample containing also chamosite. For comparison reasons the same treatment was also applied on three samples of synthetic Fe(III)-oxides, namely ferrihydrite, goethite and hematite. The removal of iron from the six bauxite samples was found to vary between 7% and 29% and the highest extraction corresponded to the sample containing the Fe(II) rich compound, chamosite. The bioavailability of Fe in the three synthetic oxides was highly dependant on their crystallinity. The amorphous ferrihydrite was almost completely dissolved, up to 95%, whereas dissolution of crystalline goethite and hematite did not exceed 9% and 1.2% respectively. (C) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2009.09.005	en
dc.identifier.isi	ISI:000272923800004	en
dc.identifier.volume	23	en
dc.identifier.issue	1	en
dc.identifier.spage	25	en
dc.identifier.epage	31	en