title: Assessment of the possible reuse of MSW coming from landfill mining of old open dumpsites.
abstract: The present study addresses the theme of recycling potential of old open dumpsites by using landfill mining. Attention is focused on the possible reuse of the residual finer fraction (<4 mm), which constitutes more than 60% of the total mined material, sampled in the old open dumpsite of Lavello (Southern Italy). We propose a protocol of analysis of the landfill material that links chemical analyses and environmental bioassays. This protocol is used to evaluate the compatibility of the residual matrix for the disposal in temporary storages and the formation of "bio-soils" to be used in geo-environmental applications, such as the construction of barrier layers of landfills, or in environmental remediation activities. Attention is mainly focused on the presence of heavy metals and on the possible interaction with test organisms. Chemical analyses of the residual matrix and leaching tests showed that the concentration of heavy metals is always below the legislation limits. Biological acute tests (with Lepidum sativum, Vicia faba and Lactuca sativa) do not emphasize adverse effects to the growth of the plant species, except the bioassay with V. faba, which showed a dose-response effect. The new developed chronic bioassay test with Spartium junceum showed a good adaptation to stress conditions induced by the presence of the mined landfill material. In conclusion, the conducted experimental activities demonstrated the suitability of the material to be used for different purposes.
authors.affiliation: School of Engineering, University of Basilicata, viale dell'Ateneo Lucano, 10, 85100 Potenza, Basilicata, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Masi
authors.affiliation: School of Engineering, University of Basilicata, viale dell'Ateneo Lucano, 10, 85100 Potenza, Basilicata, Italy. Electronic address: donatella.caniani@unibas.it.
authors.forename: D
authors.initials: D
authors.lastname: Caniani
authors.affiliation: School of Engineering, University of Basilicata, viale dell'Ateneo Lucano, 10, 85100 Potenza, Basilicata, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Grieco
authors.affiliation: School of Engineering, University of Basilicata, viale dell'Ateneo Lucano, 10, 85100 Potenza, Basilicata, Italy.
authors.forename: D S
authors.initials: DS
authors.lastname: Lioi
authors.affiliation: School of Engineering, University of Basilicata, viale dell'Ateneo Lucano, 10, 85100 Potenza, Basilicata, Italy.
authors.forename: I M
authors.initials: IM
authors.lastname: Mancini
mesh_terms: D018556:Crops, Agricultural / Q000187:drug effects; D004784:Environmental Monitoring; D007558:Italy; D019216:Metals, Heavy / Q000633:toxicity*; D059027:Recycling; D012037:Refuse Disposal; D012989:Soil Pollutants / Q000633:toxicity*; D031302:Spartium / Q000187:drug effects*; D036401:Toxicity Tests, Chronic; D064091:Waste Disposal Facilities
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants
keywords: Bioassays; Heavy metals; Landfill mining; Municipal solid waste