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Evaluation of leachate emissions from crushed rock and municipal solid waste incineration bottom ash used in road construction
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
2007 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 27, no 10, p. 1356-1365Article in journal (Refereed) Published
Abstract [en]

Three years of leachate emissions from municipal solid waste incineration bottom ash and crushed rock in a full-scale test road were evaluated. The impact of time, construction design, and climate on the emissions was studied, and the predicted release from standard leaching tests was compared with the measured release from the road. The main pollutants and their respective concentrations in leachate from the roadside slope were Al (12.8-85.3 mg l-1), Cr (2-125 μg l-1), and Cu (0.15-1.9 mg l-1) in ash leachate and Zn (1-780 μg l-1) in crushed rock leachate. From the ash, the initial Cl- release was high (≈20 g l-1). After three years, the amount of Cu and Cl- was in the same range in both leachates, while that of Al and Cr still was more than one order of magnitude higher in ash leachate. Generally, the release was faster from material in the uncovered slopes than below the pavement. Whether the road was asphalted or not, however, had minor impacts on the leachate quality. During rain events, diluted leachates with respect to, e.g., salts were observed. The leaching tests failed to simulate field leaching from the crushed rock, whereas better agreement was observed for the ash. Comparisons of constituent release from bottom ash and conventional materials solely based on such tests should be avoided.

Place, publisher, year, edition, pages
2007. Vol. 27, no 10, p. 1356-1365
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-8945DOI: 10.1016/j.wasman.2006.07.021ISI: 000249227500010Scopus ID: 2-s2.0-34547097265Local ID: 780433e0-7643-11dc-824d-000ea68e967bOAI: oai:DiVA.org:ltu-8945DiVA, id: diva2:981883
Note
Validerad; 2007; 20071009 (al)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lidelöw, SofiaLagerkvist, Anders

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