Removal of heavy metals from calcareous contaminated soils by EDTA leaching

Papassiopi, N; Tambouris, S; Kontopoulos, A

dc.contributor.author	Papassiopi, N	en
dc.contributor.author	Tambouris, S	en
dc.contributor.author	Kontopoulos, A	en
dc.date.accessioned	2014-03-01T01:15:07Z
dc.date.available	2014-03-01T01:15:07Z
dc.date.issued	1999	en
dc.identifier.issn	0049-6979	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13356
dc.subject	EDTA	en
dc.subject	Heavy metals	en
dc.subject	Leaching	en
dc.subject	Lead	en
dc.subject	Soil remediation	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Meteorology & Atmospheric Sciences	en
dc.subject.classification	Water Resources	en
dc.subject.other	Calcareous contaminated soils	en
dc.subject.other	Soil remediation	en
dc.subject.other	Calcite	en
dc.subject.other	Contamination	en
dc.subject.other	Cost effectiveness	en
dc.subject.other	Leaching	en
dc.subject.other	Lead	en
dc.subject.other	Remediation	en
dc.subject.other	Salts	en
dc.subject.other	Zinc	en
dc.subject.other	Soil pollution control	en
dc.subject.other	edetic acid	en
dc.subject.other	heavy metal	en
dc.subject.other	EDTA	en
dc.subject.other	heavy metal	en
dc.subject.other	soil remediation	en
dc.subject.other	article	en
dc.subject.other	complex formation	en
dc.subject.other	contamination	en
dc.subject.other	industrial waste	en
dc.subject.other	leaching	en
dc.subject.other	mining	en
dc.subject.other	sampling	en
dc.subject.other	soil pollution	en
dc.subject.other	waste disposal	en
dc.subject.other	waste management	en
dc.title	Removal of heavy metals from calcareous contaminated soils by EDTA leaching	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1005089515217	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1005089515217	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The performance of EDTA for the treatment of calcareous soils contaminated with heavy metals from mining and smelting activities was evaluated in this study. Soil samples containing variable levels of contamination, from 500 to 35 000 mg kg(-1) Ph and 700 to 20 000 mg kg(-1) Zn, were subjected to EDTA treatment and the extraction of heavy metals was found to vary, ranging between 50 and 98% for Pb and 50 to 100% for Zn. Total residual concentrations were above the limits set by regulatory authorities; leachable metals, however, were efficiently removed and treated soils were all acceptable in terms of toxicity. The effect of EDTA concentration and pulp density was studied on a soil sample containing 12 000 mg kg(-1) Pb and 10 000 mg kg(-1) Zn. Heavy metals removal was improved at low pulp densities and when EDTA concentration was increased from 0.025 to 0.25 M. The tetrasodium salt Na-4-EDTA was found to be less effective for metals removal compared to the disodium salt Na-2-EDTA, though applied at higher concentrations. This experimental work has also demonstrated the great importance of soil matrix for the overall evaluation of the EDTA leaching as a cost effective remedial option. The simultaneous dissolution of calcite was found to consume approximately 90% of the available EDTA. It was thus concluded that for the treatment of calcareous soils the design criteria and cost estimations should be based on the calcite content of the soil.	en
heal.publisher	KLUWER ACADEMIC PUBL	en
heal.journalName	Water, Air, and Soil Pollution	en
dc.identifier.doi	10.1023/A:1005089515217	en
dc.identifier.isi	ISI:000078688000001	en
dc.identifier.volume	109	en
dc.identifier.issue	1-4	en
dc.identifier.spage	1	en
dc.identifier.epage	15	en