Evaluation of Fe(III) reducing microorganisms for the biostabilisation of chromium in contaminated soils

Papassiopi, N; Kontoyianni, A; Vaxevanidou, K; Xenidis, A

dc.contributor.author	Papassiopi, N	en
dc.contributor.author	Kontoyianni, A	en
dc.contributor.author	Vaxevanidou, K	en
dc.contributor.author	Xenidis, A	en
dc.date.accessioned	2014-03-01T02:51:40Z
dc.date.available	2014-03-01T02:51:40Z
dc.date.issued	2008	en
dc.identifier.issn	08950563	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35595
dc.subject.other	Bioreduction	en
dc.subject.other	Chemical method	en
dc.subject.other	Contaminated soils	en
dc.subject.other	Growth medium	en
dc.subject.other	Hexavalent chromium	en
dc.subject.other	In-situ	en
dc.subject.other	Metabolic activity	en
dc.subject.other	Microbial process	en
dc.subject.other	Remediation strategies	en
dc.subject.other	Soil sample	en
dc.subject.other	Toxic contaminants	en
dc.subject.other	Trivalent state	en
dc.subject.other	Chromium	en
dc.subject.other	Chromium compounds	en
dc.subject.other	Contamination	en
dc.subject.other	Iron compounds	en
dc.subject.other	Microorganisms	en
dc.subject.other	Remediation	en
dc.subject.other	Soil pollution	en
dc.subject.other	Soils	en
dc.subject.other	Toxic materials	en
dc.subject.other	Waste management	en
dc.title	Evaluation of Fe(III) reducing microorganisms for the biostabilisation of chromium in contaminated soils	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1061/40970(309)67	en
heal.identifier.secondary	http://dx.doi.org/10.1061/40970(309)67	en
heal.publicationDate	2008	en
heal.abstract	Hexavalent chromium (Cr(VI)) is a common and highly toxic contaminant in soils. Most remediation strategies developed for Cr(VI) contaminated soils aim at reducing the hexavalent form to the less toxic trivalent state, Cr(III), which can be efficiently immobilised in situ due to the very low solubility of Cr(III) compounds. This conversion can be achieved by conventional chemical methods. Another alternative is the exploitation of microbial processes, using microorganisms that exhibit the appropriate metal bioreduction potential. Current study investigates the possibility of exploiting the metabolic activity of an iron reducing microorganism, Desulfuromonas palmitatis. During the initial experiments Cr(VI) was added in the growth medium of the microorganism at three levels, i.e. 5, 15 and 30 mg/l. Complete reduction was obtained at all three concentrations, but growth of the bacteria was observed only in the medium with the lowest initial Cr(VI) content, i.e. 5 mg/l. In the subsequent experiments D. palmitatis were used for the treatment of soil samples artificially contaminated with Cr(VI) at two levels, i.e. 200 and 500 mg/kg. Experimental results with soils confirmed the bioreducing potential of D. palmitatis. Copyright ASCE 2008.	en
heal.journalName	Geotechnical Special Publication	en
dc.identifier.doi	10.1061/40970(309)67	en
dc.identifier.issue	177	en
dc.identifier.spage	535	en
dc.identifier.epage	542	en