8 documents found, page 1 of 1
Efficient solar-driven degradation of diclofenac in aquatic environments using ...
Tlemcani, Saad Slimani; Fernandes, Ricardo Jorge Cunha; Silva, Ana Rita Pereira; Parpot, Pier; Canle, M.; Pereira, LucianaPhotocatalysis has gained considerable attention for the degradation of hazardous pollutants. In this study, the photocatalytic efficiency of Cu(0.50%)/TiO/Kaolin thin films was evaluated for the removal of diclofenac (DCF), a widely used non-steroidal anti-inflammatory drug, from aquatic environments. The photocatalytic activity of the thin films was assessed in three different water matrices: distilled water ...
Potential of magnetic silver-coupled zinc and copper ferrite nanoparticles as v...
Fernandes, Ricardo Jorge Cunha; Cardoso, Beatriz D.; Silva, A. R.; Pereira, Luciana; Coutinho, Paulo J. G.Increased environmental concerns about water pollution and scarcity have driven the development of innovative processes and technologies to address these issues. Photocatalysis using nanomaterials is auspicious, with proven efficiency in degrading different pollutants. Ferrite nanoparticles (MFe2O4) stand out for their dual functionality, photocatalytic activity and potential superparamagnetic behavior, that ma...
Potential of photocatalytic nanomaterials for PFOA and PFOS degradation: challe...
Fernandes, Ricardo Jorge Cunha; Silva, Ana Rita Pereira; Cardoso, Beatriz D.; Coutinho, Paulo J. G.; Pereira, LucianaPer- and polyfluoroalkyl substances (PFAS) are persistent chemicals that pose significant environmental and health risks due to their widespread presence in water systems and their accumulation in the human body. Their strong carbon-fluorine bonds provide exceptional structural stability, making them extremely recalcitrant to conventional degradation processes. PFAS exposure has been linked to health issues inc...
Zinc/magnesium ferrite nanoparticles functionalized with silver for optimized p...
Fernandes, Ricardo Jorge Cunha; Cardoso, Beatriz D.; Rodrigues, Ana Rita Oliveira; Pires, Ana; Pereira, André M.; Araújo, João P.; Pereira, LucianaWater pollution is a major environmental challenge. Due to the inefficiency of conventional wastewater treatment plants in degrading many organic complex compounds, these recalcitrant pollutants end up in rivers, lakes, oceans and other bodies of water, affecting the environment and human health. Semiconductor photocatalysis is considered an efficient complement to conventional methods, and the use of various n...
Influence of micro-aeration in the production of volatile fatty acids (VFA) fro...
Duarte, Maria Salomé Lira; Fernandes, Ricardo Jorge Cunha; Sousa, João; Pereira, Carla; Mesquita, D. P.; Alves, M. M.Waste management and valorization are seen as pivotal drivers for adopting a circular economy. The production of volatile fatty acids (VFA) through anaerobic digestion (AD) fits perfectly into these emerging social and industrial dynamics, being the VFA considered valuable products, namely in chemical industries. Therefore, this work focuses on VFA production through AD, using wastes and wastewaters, with high ...
Photodeposition of silver on Zinc/Calcium ferrite nanoparticles: A contribution...
Fernandes, Ricardo Jorge Cunha; Magalhães, Carlos A. B.; Rodrigues, Ana Rita Oliveira; Almeida, B. G.; Pires, Ana; Pereira, André MiguelThe efficient photodegradation of textile dyes is still a challenge, especially considering resistant azo dyes. In this work, zinc/calcium mixed ferrite nanoparticles prepared by the sol-gel method were coupled with silver by a photodeposition method to enhance the photocatalytic potency. The obtained zinc/calcium ferrites are mainly cubic-shaped nanoparticles sized 15 ± 2 nm determined from TEM and XRD and an ...
Fotodegradação de efluentes utilizando nanopartículas compósitas de ferrite de ...
Fernandes, Ricardo Jorge CunhaA água é indispensável a todos os seres vivos. É um recurso não renovável, sendo necessária uma utilização cuidadosa. Com o crescimento populacional e o consequente aumento da industrialização, os níveis de poluição nos recursos hídricos aumentaram drasticamente. O setor têxtil aparece como um dos mais poluentes em Portugal. Neste projeto foram desenvolvidos novos fotocatalisadores à base de nanopartículas comp...
A representação da realeza e da nobreza na Crónica de 1419
Fernandes, Ricardo Jorge CunhaDissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em História, Especialidade de História Medieval.; O objeto de análise desta dissertação é a Crônica de Portugal de 1419, de autoria até hoje ainda duvidosa, esta, enquadrada no gênero literário denominado cronística medieval, tem como tema específico para este trabalho a representação da realeza e da nobreza no seio...