56 documents found, page 1 of 6
Occurrence of persistent organic pollutants at Alqueva's surface water at touri...
Raposo, Ana; Mansilha, Catarina; Veber, Alexander; Melo, Armindo; Rodrigues, Joao; Matias, Rui; Rebelo, Helena; Grossinho, José; Cano, ManuelaFreshwater pollution is a huge concern. A study aiming to evaluate water quality and occurence of two groups of persistent environmental pollutants with similar chemical properties (polycyclic aromatic hydrocarbons-PAHs and microplastics -MPs) in Alqueva’s surface water was performed during 2021. Samples were collected at three spots related to touristic activities (two beaches and one marina) once by season. I...
Geochemistry of Soils from the Surrounding Area of a Coal Mine Waste Pile Affec...
Santos, Patrícia; Espinha Marques, Jorge; Ribeiro, Joana; Mansilha, Catarina; Melo, Armindo; Fonseca, Rita; Sant' Ovaia, Helena; Flores, DeolondaCoal mining can generate organic and inorganic contaminants that can be disseminated in the surrounding soils by leaching and/or aerial deposition. This study aims to identify and characterize the physicochemical and geochemical changes promoted in soils from the surrounding area of a self-burning waste pile in an abandoned coal mine. A soil sampling campaign was conducted bordering the waste pile, comprising t...
Occurrence of polycyclic aromatic hydrocarbons, microplastics and biofilms in A...
Raposo, Ana; Mansilha, Catarina; Veber, Alexander; Melo, Armindo; Rodrigues, Joao; Matias, Rui; Rebelo, Helena; Grossinho, José; Cano, ManuelaFreshwater pollution is a huge concern. A study aiming to evaluate physico-chemical characteristics, microbiota, occurrence of two groups of persistent environmental pollutants with similar chemical properties (polycyclic aromatic hydrocarbons- PAHs and microplastics - MPs) in Alqueva's surface water was performed during 2021. Water samples were collected at three spots related to touristic activities (two beac...
Geochemistry of Soils from the Surrounding Area of a Coal Mine Waste Pile Affec...
Santos, Patrícia; Espinha Marques, Jorge; Ribeiro, Joana; Mansilha, Catarina; Melo, Armindo; Fonseca, Rita; Sant'Ovaia, Helena; Flores, DeolindaCoal mining can generate organic and inorganic contaminants that can be disseminated in the surrounding soils by leaching and/or aerial deposition. This study aims to identify and characterize the physicochemical and geochemical changes promoted in soils from the surrounding area of a self-burning waste pile in an abandoned coal mine. A soil sampling campaign was conducted bordering the waste pile, comprising t...
Occurence of persistent environmental pollutants in freshwater
Jordão, Luisa; Mansilha, Catarina; Melo, Armindo; Nogueira, Isabel; Veber, Alexander; Puskar, Ljiljana; Schade, UlrichFreshwater pollution is a huge concern. Occurence of 2 groups of persistent pollutants with similar chemical properties (polycyclic aromatic hydrocarbons and microplastics) in Alqueva’s surface water were evaluated during 2021. Samples were collected, once per season, at 3 spots related to touristic activities. Biofilm presence on plastic and natural materials was monitored and compared.
An Integrated Multi-Approach to Environmental Monitoring of a Self-Burning Coal...
Teodoro, Ana; Santos, Patrícia; Espinha Marques, Jorge; Ribeiro, Joana; Mansilha, Catarina; Melo, Armindo; Duarte, Lia; Rodrigues de Almeida, CátiaThe São Pedro da Cova waste pile (Porto, Portugal) is composed of coal mining residues that have been self-burning since 2005 and is located close to an inhabited area and social infrastructures, further adding to effects on the environment and human health. Therefore, there is a great interest in the environmental monitoring of this waste pile. This work describes an integrative multi-approach that allows the ...
Irrigation with Coal Mining Effluents: Sustainability and Water Quality Conside...
Mansilha, Catarina; Melo, Armindo; Flores, Deolinda; Ribeiro, Joana; Rocha, João Ramalheira; Martins, Vítor; Santos, Patrícia; Marques, Jorge EspinhaTwo water effluents that drain from the abandoned coal mine of São Pedro da Cova (NW Portugal) were characterized in terms of their physic-chemical properties and suitability for irrigation purposes. Samples were also collected in a local surface stream, upstream and downstream from the mine drainage points, also used for irrigation by local farmers. Water samples were analyzed for major and minor ions and for ...
Changes Induced by Self-Burning in Technosols from a Coal Mine Waste Pile: A Hy...
Marques, Jorge Espinha; Martins, Vítor; Santos, Patrícia; Ribeiro, Joana; Mansilha, Catarina; Melo, Armindo; Rocha, Fernando; Flores, DeolindaCoal mining originates environmental impacts on soil and water bodies, including the leaching of Potentially Toxic Elements (PTEs) and Polycyclic Aromatic Hydrocarbons (PAHs) in mine waste piles. This research aims to identify and characterize changes induced by self-burning in Technosols from a coal mine waste pile by means of a comprehensive hydropedological assessment encompassing geochemical, mineralogical,...
Effect of skimmed milk on intestinal tract: prevention of increased reactive ox...
Pinho, Susana C. M.; Faria, Miguel A.; Melo, Armindo; Pinto, Edgar; Almeida, Agostinho; Alves, Rui; Cabrita, Ana R. J.; Fonseca, António J. M.The capacity of skimmed milk to neutralise increased reactive oxygen species (ROS) and to attenuate nitric oxide (NO) production, as well as to present cytoprotective effect at the intestinal level was assessed after in vitro gastro-intestinal digestion. The impact on ROS modulation was evaluated at a non-cytotoxic concentration of hydrogen peroxide (H2O2) in a co-culture of Caco-2 and HT-29 intestinal cells. I...
Simultaneous determination of melatonin and trans-resveratrol in wine by disper...
Viegas, Olga; Esteves, Cristina; Rocha, Janete; Melo, Armindo; Ferreira, Isabel M.P.L.V.O.The discovery of melatonin (Mel) in wines triggered a new interest in the paradigm of health benefits and wine consumption, usually ascribed to trans-resveratrol (trans-RSV). In this context, a dispersive liquid-liquid microextraction for the analysis of Mel and trans-RSV in wines by LC-FLD was developed. A 26-1 factorial design was used to identify the significant variables (p < 0.05) and Central Composite Des...