Environmental-chemical compatibility of granitic-mining waste for liner material

• Autor(a) principal: Marchiori, Leonardo
• Data de Publicação: 2023
• Outros Autores: Studart, André, Morais, Maria Vitoria, Albuquerque, Antonio, Andrade Pais, Luís, Cavaleiro, Victor
• Idioma: eng
• Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Texto Completo: http://hdl.handle.net/10400.6/13854
• topic: Mining waste; Granitic waste; Circular economy; Waste valorization; Chemical properties; Environmental impact

Mining waste is generated from extracting mineral resources and, without proper disposal, can lead to negative environmental impacts because it can contain pollutants. Emerging studies of alternatives valorizing and reusing the residue through sustainable practices. Therefore, this research investigated the potential of granitic mining waste for waterproof liner materials, considering that most used liners, clays and geosynthetics, are increasingly scarce and costly solutions, respectively. This paper aims to analyze chemical compatibility, and microscopic structure of a granitic-mining mud to produce alternative material for liner construction. It was mixed in a clay at 25% and 50% ratio to develop a waste-based geocomposites. European limits for pollutants were respected for all mixtures, and the permeability remained less than 10-9m/s, which appears to be feasible for liners production. Thus, the valorization of mining waste as liner material arises as solution for creating new waste-based added-value product in the scope of circular economy.