Inorganic contaminant fate assessment in zero-valent iron treatment walls

Komnitsas, K; Bartzas, G; Paspaliaris, I

dc.contributor.author	Komnitsas, K	en
dc.contributor.author	Bartzas, G	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:24:30Z
dc.date.available	2014-03-01T01:24:30Z
dc.date.issued	2006	en
dc.identifier.issn	1527-5922	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17301
dc.subject	Hydraulic performance	en
dc.subject	PHREEQC-2	en
dc.subject	Tracer tests	en
dc.subject	Zero-valent iron walls	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	LONG-TERM PERFORMANCE	en
dc.subject.other	ACID-MINE DRAINAGE	en
dc.subject.other	REACTIVE BARRIER	en
dc.subject.other	LABORATORY EVALUATION	en
dc.subject.other	PREFERENTIAL FLOW	en
dc.subject.other	SOLUTE TRANSPORT	en
dc.subject.other	GRANULAR IRON	en
dc.subject.other	COLUMNS	en
dc.subject.other	TRICHLOROETHYLENE	en
dc.subject.other	DEGRADATION	en
dc.title	Inorganic contaminant fate assessment in zero-valent iron treatment walls	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/15275920600840479	en
heal.identifier.secondary	http://dx.doi.org/10.1080/15275920600840479	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	This article discusses the fate assessment of several inorganic contaminants in zero-valent iron treatment walls used for the cleanup of acidic plumes and the prevention of groundwater contamination in active or abandoned mixed sulphide and coal mining sites. The fate assessment of contaminants provides useful information for potential forensics investigations carried out in affected mining and waste disposal sites. Laboratory studies using sodium chloride as conventional tracer were carried out to identify transport-related issues and assess the performance and long-term reactivity of iron walls. Transport parameters, such as residence time, dispersion, and heterogeneity, were determined by fitting chloride breakthrough curves (BTCs) to the convection-dispersion equation using time moment analysis and the CXTFIT 2.1 curve-fitting software. First moment analysis of breakthrough curves revealed modest increase in pore-water velocity over time, indicative of decreasing porosity within the reactive mass, mainly due to the formation of mineral precipitates. Geochemical modeling of the process, including interactions between iron filings, heavy metal ions, and sulphates; interpretation of the ionic profiles; and calculation of porosity loss was also carried out by using the speciation/mass transfer computer code PHREEQC-2 and the WATEQ4F database. Copyright © Taylor & Francis Group, LLC.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	Environmental Forensics	en
dc.identifier.doi	10.1080/15275920600840479	en
dc.identifier.isi	ISI:000239923600004	en
dc.identifier.volume	7	en
dc.identifier.issue	3	en
dc.identifier.spage	207	en
dc.identifier.epage	217	en