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Opportunities and Constraints of the Adsorption of Rare Earth Elements onto Pyr...

Nogueira, Miguel; Bernardo, Maria; Ventura, Márcia; Matos, Inês; Pinto, Filomena; Lapa, Nuno

ABSTRACT: Rare earth elements (REEs), comprising seventeen metallic elements, including lanthanides, scandium, and yttrium, are indispensable for modern technological industries due to their unique properties. However, their supply is critically risky for the European Union, with 95% of global production concentrated in China, Brazil, Vietnam, Russia, India, and Australia. This mini-review examines the adsorpti...

Data: 2024   |   Origem: Repositório do LNEG

Microalgae as a selenium vehicle for nutrition: a review

Pires, Rita; Costa, Margarida; Pereira, Hugo; Cardoso, Helena; Ferreira, Luís; Lapa, Nuno; Silva, Joana; Ventura, Márcia

Selenium (Se) is essential for human and animal nutrition, playing a key role in antioxidant and immune functions. Organic Se is better for supplementation because it is more efficiently assimilated and less toxic than its inorganic form. Due to the scarcity of Se in European soils, supplementation in feed and food is necessary. Currently, inorganic Se (sodium selenite and selenate) and organic Se in Se-enriche...


Valorisation of spent tire rubber as carbon adsorbents for Pb(II) and W(VI) in ...

Bernardo, Maria; Lapa, Nuno; Pinto, Filomena; Nogueira, Miguel; Matos, Inês; Ventura, Márcia; Ferraria, Ana Maria; Rego, Ana Maria Botelho do

ABSTRACT: Spent tire rubber-derived chars and their corresponding H3PO4 and CO2-activated chars were used as adsorbents in the recovery of Pb(II) ion and (W(VI)) oxyanion from synthetic solutions. The developed chars (both raw and activated) were thoroughly characterized to have insight about their textural and surface chemistry properties. H3PO4-activated chars presented lower surface areas than the raw chars ...

Data: 2023   |   Origem: Repositório do LNEG

BioH2 from Dark Fermentation of OFMSW: Effect of the Hydraulic Retention Time a...

Martins, Inês; Surra, Elena; Ventura, Márcia; Lapa, Nuno

Food wastes represent one third of all food produced worldwide. It is crucial to both prevent the production of food waste and recover the wasted fraction with the aim to valorizing it. In this context, the conversion of the organic fraction of municipal solid wastes (OFMSW) into bioH2 by dark fermentation (DF) is an important technology to valorize these wastes into renewable fuel. Nevertheless, the DF of OFMS...


Relatório de Estágio Curricular - Banco Português de Investimentos - BPI (Guarda)

Ventura, Márcia

No âmbito da conclusão da Licenciatura em Gestão, lecionada na Escola Superior de Tecnologia e Gestão (ESTG) do Instituto Politécnico da Guarda (IPG), a realização de um estágio é parte integrante da estrutura da licenciatura. Assim, o estágio foi realizado no Banco Português de Investimentos (BPI), no Balcão da Guarda, Misericórdia. No primeiro dia de estágio, a estagiária foi recebida de forma acolhedora na I...


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