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Assessing the impact of sewage sludge on a formally remediated tailings impoundment in relation to the transport of metals in groundwater
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7291-8585
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
2011 (English)In: Mine Water - managing the Challenges: 11th Congress of the International Mine Water Association / [ed] Thomas R. Rüde; Antje Freund; Christian Wolkersdorfer, Aachen, Germany: RWTH Aachen University, Institute of Hydrogeology , 2011, p. 429-434Conference paper, Published paper (Refereed)
Abstract [en]

In 2009 sewage sludge was applied to an already successfully remediated saturated and dry covered sulphide tailings impoundment in northern Sweden as a vegetation substrate. The aim of this study was to identify the dispersion, magnitude and duration of sludge-borne constituents released. Readily leachable sludge-borne constituents (DOC, Fe, Co, Cr, Ni, Pb and Zn) created a contamination plume which affected the impoundment groundwater within the first year of application. The majority of the plume originated from the water-saturated area of the impoundment that was only covered with a 10% surface area of sludge. The dry-composite covered area of the impoundment, which contained a 70% sludge cover, did not contribute to the contamination plume due to the efficiency of the cover at reducing water infiltration and contamination dispersal. The constituents were transported along the dominant groundwater flow direction, underneath the dry covered area of the impoundment, to the effluent of the impoundment groundwater system due to inflowing uncontaminated groundwater from an adjacent till slope. All metal and DOC concentrations in the impoundment groundwater returned to pre-sludge application concentrations within two years, due to successful plant establishment on the sludge.

Place, publisher, year, edition, pages
Aachen, Germany: RWTH Aachen University, Institute of Hydrogeology , 2011. p. 429-434
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-29607Local ID: 3215867d-2e43-4ab1-bee2-50da0f28eab5ISBN: 978-3-00-035543-1 (print)OAI: oai:DiVA.org:ltu-29607DiVA, id: diva2:1002831
Conference
International Mine Water Association Congress : Mine Water - Managing the Challenges : 04/09/2011 - 11/09/2011
Note
Godkänd; 2011; 20111013 (petnas)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Nason, PeterAlakangas, LenaÖhlander, Björn

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