Stabilization of oxidic tailings and contaminated soils by calcium oxyphosphate addition: The case of Montevecchio (Sardinia, Italy)

Xenidis, A; Stouraiti, C; Paspaliaris, I

dc.contributor.author	Xenidis, A	en
dc.contributor.author	Stouraiti, C	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:15:13Z
dc.date.available	2014-03-01T01:15:13Z
dc.date.issued	1999	en
dc.identifier.issn	1058-8337	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13385
dc.subject	Cadmium	en
dc.subject	Calcium oxyphosphate	en
dc.subject	Lead	en
dc.subject	Phytotoxicity	en
dc.subject	Remediation of oxidic tailings	en
dc.subject	Soil contamination	en
dc.subject	Soil remediation	en
dc.subject	Stabilization	en
dc.subject	Toxicity	en
dc.subject	Zinc	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	METALS	en
dc.subject.other	LEAD	en
dc.subject.other	PB	en
dc.subject.other	IMMOBILIZATION	en
dc.subject.other	PHOSPHATE	en
dc.subject.other	APATITE	en
dc.subject.other	PLANTS	en
dc.subject.other	ZN	en
dc.title	Stabilization of oxidic tailings and contaminated soils by calcium oxyphosphate addition: The case of Montevecchio (Sardinia, Italy)	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/10588339991339540	en
heal.identifier.secondary	http://dx.doi.org/10.1080/10588339991339540	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The effectiveness of an in situ heavy metals fixation technique aimed at converting contaminants to low solubility and low bioavailability forms, eliminating the risk posed by oxidic tailings and contaminated soils, was investigated. Calcium oxyphosphate salt (Ca( H2PO4)(2). H2O) was used as a stabilizing agent for oxidic tailings and contaminated soils originating from Montevecchio, Sardinia, Italy. Stabilization was effected by mixing the contaminated soil or oxidic tailing sample with calcium oxyphosphate salt at various doses. The effectiveness of stabilization was evaluated by USEPA TCLP standard toxicity testing. Complementary EDTA extraction tests and biological tests using beans Phaseolous vulgaris as plant indicator were carried out. The toxicity of Pb and Cd was reduced below TCLP regulatory limits at calcium oxyphosphate doses higher than 0.7 and 0.2% w/w for soils and tailings, respectively. Lead solubility according to the EDTA test decreased with phosphate dose for both materials tested. Lead uptake by plant leaves and roots from the soil sample decreased with the phosphate addition, while Cd uptake remained almost constant. An adverse effect on plant growth and Zn uptake was observed for calcium oxyphosphate dose up to 1.1% w/w. Based on the results, a remediation scheme for oxidic tailings and contaminated soils is proposed.	en
heal.publisher	CRC PRESS INC	en
heal.journalName	Soil and Sediment Contamination	en
dc.identifier.doi	10.1080/10588339991339540	en
dc.identifier.isi	ISI:000084671400005	en
dc.identifier.volume	8	en
dc.identifier.issue	6	en
dc.identifier.spage	681	en
dc.identifier.epage	697	en