Change search
ReferencesLink to record
Permanent link

Direct link
Reactive transport modeling of leachate evolution of MSWI bottom ash used as road basement: Hérouville (France) and Dåva (Sweden) sites
Ecole des Mines de Paris.
Ecole des Mines de Paris.
INERIS, Wastes and Contaminated Sites Unit.
Show others and affiliations
2009 (English)Conference paper, Presentation (Other academic)
Abstract [en]

The recycling of municipal solid waste of incineration (MSWI) bottom ash as aggregates for road basement requires a better characterization of the evolution of leachate chemistry over a timescale of many decades. In this paper, a common reactive transport model is applied to the Hérouville (France) and Dåva (Sweden) pilot roads whose leachate emissions have been sampled during 10 and 6 years, respectively. The model considers simultaneously the hydrodynamic processes (rain water infiltration, advective and diffusive transport), pH-buffering and solubility-controlled processes by secondary minerals, ageing by atmospheric carbonation, and the leachate chemistry (major elements and trace metals such as Al, Cu, Pb). The evolution of pH is fairly well simulated with the following pH-buffering sequence: portlandite, calcium silicate hydrate (CSH), ettringite and, finally, calcite. The quantity of CO2 dissolved in the percolating rain water is generally not sufficient to explain the pH evolution and carbonation processes, requiring atmospheric gaseous inputs. The relation between pH evolution and element release is discussed for both sites. Calculated Pb release is overestimated when based on solubility-controlled mechanisms only. Edge effects are shown to be important at both sites with an emphasis of carbonation and release of non reactive elements. Temperature has no significant effect on the calculated leachate chemistry in the range of 5 - 30° C, except at high pH.

Place, publisher, year, edition, pages
Research subject
Waste Science and Technology
URN: urn:nbn:se:ltu:diva-31709Local ID: 5f699250-b8b1-11de-b769-000ea68e967bOAI: diva2:1004943
International Conference on the Environmental and Technical Implications of Construction with Alternative Materials : 03/06/2009 - 05/06/2009
Godkänd; 2009; Bibliografisk uppgift: Værtspublikationsredaktører: Jacques Mehu; 20091014 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

Open Access in DiVA

fulltext(1538 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 1538 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Lidelöw, SofiaLagerkvist, Anders
By organisation
Geosciences and Environmental Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link