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Advisor(s)
Abstract(s)
Os resíduos agroindustriais têm sido investigados para aplicações de engenharia devido à sua elevada produção e ausência de valorização adequada face aos requisitos legais e de políticas e metas de sustentabilidade. O estudo das caraterísticas das cascas de amêndoas (CA) e nozes (CN) têm suscitado interesse na comunidade científica para desenvolver materiais alternativos e inovadores, com design sustentável, em várias aplicações. Este trabalho tem como objetivo caracterizar e analisar as propriedades físico-químicas de CA, CN e de um solo residual, bem como de duas misturas de cada resíduo com o solo, com 10% e 40% de cascas, para eventual aplicação em obras de terra. Os resultados mostraram que ambos os resíduos poderiam ser incorporados no solo para torná-los mais granulares e reduzir a densidade específica, além de terem potencial para remover alguns poluentes da água devido à presença de aluminosilicatos com K2O, CaO e SiO2. Esta aplicabilidade poderia reduzir a utilização de solos naturais em obras de terra, a incineração de ambas as cascas e sua deposição em aterros sanitários, podendo promover a sua valorização e criar produtos baseados em resíduos no âmbito da economia circular. No entanto, são necessários estudos adicionais para uma melhor compreensão do seu potencial para utilização em obras de terra, nomeadamente ensaios de lixiviação, degradação e adsorção.
Agro-industrial waste has been investigated for engineering applications due to its high production and lack of adequate recovery considering legal requirements and sustainability policies and goals. The study of the characteristics of almond (CA) and walnut (CN) shells has sparked interest in the scientific community to develop alternative and innovative materials, with sustainable design for several applications. This work aims to characterize and analyze the physical-chemical properties of CA, CN, and a residual soil, as well as two mixtures of each residue with the soil, with 10% and 40% bark, for evaluating their use in earthworks. The results showed that both residues could be incorporated into the soil to make them more granular and reduce specific density, in addition to having the potential to remove some pollutants from water due to the presence of aluminosilicates with K2O, CaO and SiO2. This applicability could reduce the use of natural soil in earthworks, the incineration of both shells and their disposal in landfills and could promote their recovery and create waste-based products within the scope of the circular economy. However, additional studies are needed to better understand its potential for use in earthworks, namely leaching, degradation and adsorption tests.
Agro-industrial waste has been investigated for engineering applications due to its high production and lack of adequate recovery considering legal requirements and sustainability policies and goals. The study of the characteristics of almond (CA) and walnut (CN) shells has sparked interest in the scientific community to develop alternative and innovative materials, with sustainable design for several applications. This work aims to characterize and analyze the physical-chemical properties of CA, CN, and a residual soil, as well as two mixtures of each residue with the soil, with 10% and 40% bark, for evaluating their use in earthworks. The results showed that both residues could be incorporated into the soil to make them more granular and reduce specific density, in addition to having the potential to remove some pollutants from water due to the presence of aluminosilicates with K2O, CaO and SiO2. This applicability could reduce the use of natural soil in earthworks, the incineration of both shells and their disposal in landfills and could promote their recovery and create waste-based products within the scope of the circular economy. However, additional studies are needed to better understand its potential for use in earthworks, namely leaching, degradation and adsorption tests.
Description
Keywords
Cascas de amêndoa Obras de terra Cascas de nozes Economia circular Valorização de resíduos Resíduo agroindustrial
Citation
Marchiori, L.; Nouioua, T.; Morais, M.V.; Silva, F.; Albuquerque, A.; Andrade Pais, L.; Cavaleiro, V. (2023). Caracterização físico-química de cascas de amêndoas e nozes para valorização em obras de terra. In 13ªs Jornadas Técnicas Internacionais de Resíduos (JTIR). Bragança