Stabilization of Pb and As in soils by applying combined treatment with phosphates and ferrous iron

Xenidis, A; Stouraiti, C; Papassiopi, N

dc.contributor.author	Xenidis, A	en
dc.contributor.author	Stouraiti, C	en
dc.contributor.author	Papassiopi, N	en
dc.date.accessioned	2014-03-01T01:34:39Z
dc.date.available	2014-03-01T01:34:39Z
dc.date.issued	2010	en
dc.identifier.issn	0304-3894	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20788
dc.subject	Arsenic	en
dc.subject	Iron sulfate	en
dc.subject	Lead	en
dc.subject	Phosphates	en
dc.subject	Stabilization	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Arsenic uptake	en
dc.subject.other	Chemical immobilization	en
dc.subject.other	Coaddition	en
dc.subject.other	Combined treatment	en
dc.subject.other	Contaminated soils	en
dc.subject.other	Drinking water standards	en
dc.subject.other	Ferrous iron	en
dc.subject.other	Ferrous sulfate	en
dc.subject.other	Iron sulfate	en
dc.subject.other	Iron sulfates	en
dc.subject.other	Leachability	en
dc.subject.other	Low level	en
dc.subject.other	Molar ratio	en
dc.subject.other	Monocalcium phosphates	en
dc.subject.other	pH sensitive	en
dc.subject.other	Phytoaccumulation	en
dc.subject.other	Stabilizing agents	en
dc.subject.other	Water extracts	en
dc.subject.other	Arsenic	en
dc.subject.other	Dissolution	en
dc.subject.other	Lead	en
dc.subject.other	Phosphates	en
dc.subject.other	Potable water	en
dc.subject.other	Regulatory compliance	en
dc.subject.other	Soil pollution	en
dc.subject.other	Soils	en
dc.subject.other	Solvent extraction	en
dc.subject.other	Stabilization	en
dc.subject.other	Water supply	en
dc.subject.other	Zinc	en
dc.subject.other	Iron	en
dc.subject.other	aluminum	en
dc.subject.other	arsenic	en
dc.subject.other	cadmium	en
dc.subject.other	calcium	en
dc.subject.other	calcium phosphate	en
dc.subject.other	drinking water	en
dc.subject.other	ferrous ion	en
dc.subject.other	ferrous sulfate	en
dc.subject.other	lead	en
dc.subject.other	phosphate	en
dc.subject.other	potassium	en
dc.subject.other	zinc	en
dc.subject.other	acidification	en
dc.subject.other	arsenic	en
dc.subject.other	bioaccumulation	en
dc.subject.other	immobilization	en
dc.subject.other	iron	en
dc.subject.other	leaching	en
dc.subject.other	lead	en
dc.subject.other	pH	en
dc.subject.other	phosphate	en
dc.subject.other	soil pollution	en
dc.subject.other	sulfate	en
dc.subject.other	waste treatment	en
dc.subject.other	article	en
dc.subject.other	chemical reaction	en
dc.subject.other	immobilization	en
dc.subject.other	leaching	en
dc.subject.other	pH	en
dc.subject.other	soil analysis	en
dc.subject.other	soil pollution	en
dc.subject.other	Arsenic	en
dc.subject.other	Biodegradation, Environmental	en
dc.subject.other	Ferrous Compounds	en
dc.subject.other	Greece	en
dc.subject.other	Lead	en
dc.subject.other	Phosphates	en
dc.subject.other	Plants	en
dc.subject.other	Soil	en
dc.subject.other	Soil Pollutants	en
dc.title	Stabilization of Pb and As in soils by applying combined treatment with phosphates and ferrous iron	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jhazmat.2010.01.006	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jhazmat.2010.01.006	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The chemical immobilization of Pb and As in contaminated soil from Lavrion, Greece, using monocalcium phosphate and ferrous sulfate as stabilizing agents was investigated. Monocalcium phosphate was added to contaminated soil at PO4 to Pb molar ratios equal to 0, 0.5, 1, 1.5 and 2.5, whereas ferrous sulfate was added at Fe to As molar ratios equal to 0, 2.5, 5, 10 and 20. Phosphates addition to contaminated soil decreased Pb leachability, but resulted in significant mobilization of As. Simultaneous immobilization of Pb and As was obtained only when soil was treated with mixtures of phosphates and ferrous sulfate. Arsenic uptake by plants was also seen to increase when soil was treated only with phosphates, but co-addition of ferrous sulfate was efficient in maintaining As phytoaccumulation at low levels. The addition of at least 1.5 M/M phosphates and 10 M/M iron sulfate to soil reduced the dissolved levels of Pb and As in the water extracts to values in compliance with the EU drinking water standards. However, both additives contributed in the acidification of soil, decreasing pH from 7.8 to values as low as 5.6 and induced the mobilization of pH sensitive elements, such as Zn and Cd. (C) 2010 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Hazardous Materials	en
dc.identifier.doi	10.1016/j.jhazmat.2010.01.006	en
dc.identifier.isi	ISI:000276154500122	en
dc.identifier.volume	177	en
dc.identifier.issue	1-3	en
dc.identifier.spage	929	en
dc.identifier.epage	937	en