Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/2067/43757
Titolo: | Perspectives of using lignin as additive to improve the permeability of in-situ soils for barrier materials in landfills | Autori: | Di Matteo, Lucio Bulletti, Lorenzo Capecchi, Eliana Viola, Antonio La Piccinino, Davide Piscopo, Vincenzo |
Rivista: | SUSTAINABILITY | Data pubblicazione: | 2020 | Abstract: | © 2020 by the authors. Very often, in-situ soil does not meet the requirements for landfill barriers; therefore, it is necessary to purchase the material from quarries. An increasing number of by-products have been proposed as alternative landfill barrier materials. The present study investigated the performance of two soils of Central Italy (alluvial and volcanic soils) with an organosolv lignin (sulfur-free lignin (SFL), a widespread by-product in the world. Laboratory investigations indicated that the volcanic soil mixed with 10% in weight of lignin did not reach the permeability value required for landfill bottom liners, also showing high compressibility. On the contrary, the addition of 20% to 30% lignin to the alluvial soil reached the permeability value recommended for the top-sealing layer of landfills: scanning electron microscope analysis indicated that the improvement was due mainly to the physical binding. Large-scale investigations should be carried out to evaluate the long-term performance of the mixtures. The increasing production of organosolv lignin worldwide gives this by-product the opportunity to be used as an additive for the realization of the top-sealing layer. The approach can save the consumption of raw materials (clayey soils from quarries), giving lignin a potential new field of application and recovering in-situ soils. |
URI: | http://hdl.handle.net/2067/43757 | ISSN: | 1937-0709 | DOI: | 10.3390/su12125197 | Diritti: | Attribution-NonCommercial-NoDerivs 3.0 United States |
È visualizzato nelle collezioni: | A1. Articolo in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | Existing users please |
---|---|---|---|---|
sustainability-12-05197.pdf | 9.71 MB | Adobe PDF | Richiedi una copia |
SCOPUSTM
Citations
20
7
Last Week
0
0
Last month
0
0
controllato il 24-mar-2024
Page view(s)
50
Last Week
0
0
Last month
0
0
controllato il 27-mar-2024
Download(s)
3
controllato il 27-mar-2024
Google ScholarTM
Check
Altmetric
Questo documento è distribuito in accordo con Licenza Creative Commons