Removal of heavy metals and arsenic from contaminated soils using bioremediation and chelant extraction techniques

Vaxevanidou, K; Papassiopi, N; Paspaliaris, I

dc.contributor.author	Vaxevanidou, K	en
dc.contributor.author	Papassiopi, N	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:29:05Z
dc.date.available	2014-03-01T01:29:05Z
dc.date.issued	2008	en
dc.identifier.issn	0045-6535	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19123
dc.subject	Arsenic	en
dc.subject	EDTA	en
dc.subject	Heavy metals	en
dc.subject	Iron reducing bacteria	en
dc.subject	Soil remediation	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Arsenic	en
dc.subject.other	Bioremediation	en
dc.subject.other	Chelation	en
dc.subject.other	Contamination	en
dc.subject.other	Desulfurization	en
dc.subject.other	Dissolution	en
dc.subject.other	Heavy metals	en
dc.subject.other	Iron oxides	en
dc.subject.other	Microorganisms	en
dc.subject.other	EDTA	en
dc.subject.other	Iron reducing bacteria	en
dc.subject.other	Soil remediation	en
dc.subject.other	Soil pollution control	en
dc.subject.other	arsenic	en
dc.subject.other	edetic acid	en
dc.subject.other	ferric oxide	en
dc.subject.other	iron oxide	en
dc.subject.other	lead	en
dc.subject.other	scavenger	en
dc.subject.other	zinc	en
dc.subject.other	Arsenic	en
dc.subject.other	Bioremediation	en
dc.subject.other	Chelation	en
dc.subject.other	Contamination	en
dc.subject.other	Desulfurization	en
dc.subject.other	Dissolution	en
dc.subject.other	Heavy metals	en
dc.subject.other	Iron oxides	en
dc.subject.other	Microorganisms	en
dc.subject.other	Soil pollution control	en
dc.subject.other	arsenic	en
dc.subject.other	bioremediation	en
dc.subject.other	EDTA	en
dc.subject.other	experimental study	en
dc.subject.other	extraction method	en
dc.subject.other	heavy metal	en
dc.subject.other	iron-reducing bacterium	en
dc.subject.other	microbial activity	en
dc.subject.other	pollutant removal	en
dc.subject.other	soil pollution	en
dc.subject.other	soil remediation	en
dc.subject.other	article	en
dc.subject.other	bioremediation	en
dc.subject.other	chelation	en
dc.subject.other	Desulfuromonas	en
dc.subject.other	Desulfuromonas palmitatis	en
dc.subject.other	dissolution	en
dc.subject.other	heavy metal removal	en
dc.subject.other	metal extraction	en
dc.subject.other	microbial activity	en
dc.subject.other	microorganism	en
dc.subject.other	nonhuman	en
dc.subject.other	reduction	en
dc.subject.other	soil pollution	en
dc.subject.other	Arsenic	en
dc.subject.other	Biodegradation, Environmental	en
dc.subject.other	Chelating Agents	en
dc.subject.other	Desulfuromonas	en
dc.subject.other	Edetic Acid	en
dc.subject.other	Lead	en
dc.subject.other	Metals, Heavy	en
dc.subject.other	Soil Microbiology	en
dc.subject.other	Soil Pollutants	en
dc.subject.other	Zinc	en
dc.subject.other	Bacteria (microorganisms)	en
dc.subject.other	Desulfuromonas palmitatis	en
dc.title	Removal of heavy metals and arsenic from contaminated soils using bioremediation and chelant extraction techniques	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.chemosphere.2007.10.025	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.chemosphere.2007.10.025	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	A combined chemical and biological treatment scheme was evaluated in this study aiming at obtaining the simultaneous removal of metalloid arsenic and cationic heavy metals from contaminated soils. The treatment involved the use of the iron reducing microorganism Desulfuromonas palmitatis, whose activity was combined with the chelating strength of EDTA. Taking into consideration that soil iron oxides are the main scavengers of As, treatment with iron reducing microorganisms aimed at inducing the reductive dissolution of soil oxides and thus obtaining the release of the retained As. The main objective of using EDTA was the removal of metal contaminants, such as Pb and Zn, through the formation of soluble metal chelates. Experimental results however indicated that EDTA was also indispensable for the biological reduction of Fe(III) oxides. The bacterial activity was found to have a pronounced positive effect oil the removal of arsenic, which increased from the value of 35% obtained during the pure chemical treatment up to 90% in the presence of D. palmitatis. In the case of Pb, the major part, i.e. approximately 85%, was removed from soil with purely chemical mechanisms, whereas the biological activity slightly improved the extraction, increasing the final removal up to 90%. Co-treatment had negative effect only for Zn, whose removal was reduced from 80% under abiotic condition to approximately 50% in the presence of bacteria. (c) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Chemosphere	en
dc.identifier.doi	10.1016/j.chemosphere.2007.10.025	en
dc.identifier.isi	ISI:000253179800001	en
dc.identifier.volume	70	en
dc.identifier.issue	8	en
dc.identifier.spage	1329	en
dc.identifier.epage	1337	en