@article{10272/24203,
year = {2024},
month = {7},
url = {https://hdl.handle.net/10272/24203},
abstract = {This study explores the potential of non-hazardous wastes for crafting an engineered
soil-like material (Technosol) suitable for landfill capping applications. Three distinct materials—
waste foundry sand (WFS), washing aggregate sludge (WAS), and composted biosolids (CBS)—were
strategically combined to develop this innovative Technosol. The formulation process involved a comprehensive analysis of their physical–chemical properties, mineral composition, leachate quality, and
a series of geotechnical assessments to ensure compliance with landfill top cover construction standards. The blend 90WFS/10WAS showed optimal geotechnical properties for constructing a protective layer, including maximum dry density (1.77 g cm−3
), void ratio (0.4), CBR index (23.2), cohesive
strength (40 kPa), internal friction (ϕ = 30◦
), and permeability coefficient (k = 1.48 × 10−6
cm s−1
).
Further enhancement was achieved by adding 10% CBS, resulting in the development of a functional
organo-mineral topsoil horizon (81WFS/9WAS/10CBS). Importantly, leachate analysis confirmed
the negligible environmental footprint of this Technosol. Moreover, a pot-based experiment with
Brassica juncea planting validated its capacity to support plant growth and establish a vegetative
cover on the landfill surface},
organization = {: We express our gratitude to the following companies for their collaboration and
assistance in sample collection: Áridos de la Luz (San Juan del Puerto, Huelva, Spain), Fundiciones
Roma (Mérida, Badajoz, Spain), and EMASESA (Seville, Spain). We also extent our appreciation to
Nereida Pascual, Lourdes Vales, and Alicia Rodríguez (DSM, Centro Ambiental de Nerva, Huelva,
Spain), and Alberto Ortiz (EMASESA) for their valuable contributions in providing essential information about the waste materials},
publisher = {MPDI},
title = {A Novel Technosol Formulation for Sustainable Landfill Top Covers Using Non-Hazardous Wastes},
doi = {10.3390/app14146166},
author = {Fernández Caliani, Juan Carlos and Álvarez Lozano, Julia and García Navarro, Encarnación and Fernández Landero, Sandra and Cantero, Cristobal and Giráldez Díaz, Inmaculada},
}