Evaluation of leaching from four recycled materials used in full-scale road constructions
2008 (English)In: Proceedings of the 2nd International Conference on Engineering for Waste Valorisation: June 3-5, 2008, Patras, Greece / [ed] Gerasimos Lyberatos; Ange Nzihou, Patras: University of Patras , 2008Conference paper (Refereed)
The medium-term (5-10 years) elemental leaching from five different materials used in full-scale road applications was evaluated. Two materials, fayalite slag and blast-furnace slag, leached high concentrations of trace metals such as Cu and Zn throughout the study period. At several occasions, the blast-furnace slag generated leachates with acidic pH-values (<4). Leachate from crushed concrete and MSWI bottom ash contained elevated concentrations of e.g. Cr and Cu during the first 2-3 years. Enrichment of trace elements occurred in sediments of roadside drainage ditches, but the respective contribution from leachate and road surface runoff is unclear. Migration of the elements through subsoil and plants in the ditches was limited, but clear anthropogenic signals were observed for e.g. Cu and Zn at the BA section. Further studies are recommended to verify if laboratory tests used for impact assessments are able to predict the observed field leaching and how the road environment is affected by leaching from the road materials in the longer term.
Place, publisher, year, edition, pages
Patras: University of Patras , 2008.
Research subject Waste Science and Technology
IdentifiersURN: urn:nbn:se:ltu:diva-37256Local ID: b3b25940-36ea-11dd-8242-000ea68e967bISBN: 978-960-530-101-9 (PDF)OAI: oai:DiVA.org:ltu-37256DiVA: diva2:1010754
International Conference on Engineering for Waste Valorisation : 03/06/2008 - 05/06/2008
Godkänd; 2008; 20080610 (soli)2016-10-032016-10-03Bibliographically approved