16 documents found, page 1 of 2

Recovery of Nd3+ and Dy3+ from E-Waste Using Adsorbents from Spent Tyre Rubbers...

ABSTRACT: This paper investigates the use of spent tyre rubber as a precursor for synthesising adsorbents to recover rare earth elements. Through pyrolysis and CO2 activation, tyre rubber is converted into porous carbonaceous materials with surface properties suited for rare earth element adsorption. The study also examines the efficiency of leaching rare earth elements from NdFeB magnets using optimised acid l...

Biorrefinarias22

Valorização de biorresíduos numa perspetiva da economia circular. Conversão de resíduos da biomassa em materiais adsorventes. Processos termoquímicos de conversão de biomassa em energia e outros compostos. Biorrefinarias: uma solução para o futuro?

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

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...

Retropubic Cartilaginous Cyst: A Rare Entity

A pubic cartilaginous cyst is a rare, benign, slow-growing degenerative lesion arising from the fibrocartilaginous part of the pubic symphysis joint usually occurring in post-menopausal women. It should be considered in the differential diagnosis of pubic and vulvar cystic masses. Since it is an uncommon lesion, especially in men, it can be easily misdiagnosed. Magnetic Resonance imaging is the investigation of...

Preliminary perceived intervention changes and engagement in an evidence-based ...

Introduction: Behavioral inhibition during early childhood is one of the strongest risk factors for the development of later anxiety disorders. Recently developed in- person interventions that target both young children who are highly inhibited and their parents (e.g., the Turtle Program), have decreased children’s anxiety and have increased social participation in the peer group. However, researchers have yet ...

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

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 ...

Perceções das famílias portuguesas acerca do impacto da participação no turtle ...

Perceptions of Portuguese parents about the acceptability of a multicomponent i...

High and stable behavioral inhibition during early childhood is a risk factor for later anxiety disorders. The few available interventions targeted at behavioral inhibition have not yet been implemented in European countries. Evaluating intervention acceptability is essential when introducing interventions in new cultures. This study aimed to explore the perceptions of parents about the acceptability of the mul...

Relatório de Estágio Curricular – Casa da Cultura – 23 Milhas (Ílhavo)

O presente relatório é alusivo ao estágio curricular que realizei no departamento de Produção, na Casa da Cultura de Ílhavo, no seu mais recente projeto, 23 Milhas, tendo apoiado também o departamento de comunicação e de igual forma o departamento de mediação, no âmbito da licenciatura de Comunicação e Relações Públicas, da Escola Superior de Educação, Comunicação e Desporto do Instituto Politécnico da Guarda. ...

Cr(III) removal from synthetic and industrial wastewaters by using co-gasificat...

ABSTRACT: Blends of rice waste streams were submitted to co-gasification assays. The resulting chars (G1C and G2C) were characterized and used in Cr(III) removal assays from a synthetic solution. A Commercial Activated Carbon (CAC) was used for comparison purposes. The chars were non-porous materials mainly composed by ashes (68.3-92.6% w/w). The influences of adsorbent loading (solid/liquid ratio - S/L) and in...