52 documents found, page 1 of 6
Competition among rare earth elements on sorption onto six seaweeds
Pinto, João; Costa, Marcelo; Henriques, Bruno; Soares, José; Dias, Mariana; Viana, Thainara; Ferreira, Nicole; Vale, Carlos; Pinheiro-Torres, JoséSorption has been proposed as a promising approach towards a sustainable water decontamination and recently to the recycling of rare earth elements (REE). Although living seaweed have been shown to be capable of removing REE from contaminated solutions, no studies have yet compared the effects of REE competition on sorption onto different groups of seaweed. These effects were analysed in the present study by ex...
Major characteristics of microplastics in mussels from the Portuguese coast
Marques, Filipa; Vale, Carlos; Rudnitskaya, Alisa; Moreirinha, Catarina; Costa, Sara T.; Botelho, Maria JoãoThe present study reports the quantity, shape, colour and chemical properties of microplastics (MP) and MP-like in whole soft tissues of the mussel Mytilus spp. collected in January and February 2019 from four natural banks in the Portuguese coast. Three sites are located in estuarine areas influenced by anthropogenic pressures and freshwater discharges, and one in the coast far from urbanised areas. An alkalin...
A Single Digestion Procedure for Determination of Major, Trace, and Rare Earth ...
Carvalho, Lina; Reis, Ana T.; Soares, Eugénio; Tavares, César; Monteiro, Rui J.R.; Figueira, Paula; Henriques, Bruno; Vale, Carlos; Pereira, EduardaThe simultaneous determination of major, trace, and rare earth elements in sediments requires the development of specific procedures to prevent interfer- ences. A single digestion method adapted from the EPA method 3051A is proposed for the quantification of 42 elements in sediments by inductively coupled plasma techniques associated with optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP- MS). ...
O desenvolvimento da carreira como facilitador da educação inclusiva
Gama, Ana; Vale, Carlos; Carvalho, Marisa; Silva, Ana DanielaRevista de Psicologia da Criança e do Adolescente. - ISSN 1647-4120. - V. 10, n. 2 (2019).- p. 381-389.; Durante décadas, os/as alunos/as com necessidades educativas, depararam-se com vários obstáculos que dificultavam a transição da escola para o mercado de trabalho, na construção de um projeto de vida que contribuísse para o seu bem-estar pleno. No entanto, face ao novo Decreto-Lei 54/2018, cabe à comunidade ...
Valuation of banana peels as an effective biosorbent for mercury removal under ...
Fabre, Elaine; Lopes, Cláudia B.; Vale, Carlos; Pereira, Eduarda; Silva, Carlos M.The use of banana peels as biosorbent for mercury sorption from different aqueous solutions was investigated in this work. The impact of the operating conditions, such as biosorbent dosage, contact time and ionic strength was evaluated for realistic initial Hg(II) concentrations of 50 μg dm-3. Biosorbent dosage and contact time showed more influence on Hg(II) removal than ionic strength, and their increase led ...
Microplastics in wild fish from North East Atlantic Ocean and its potential for...
Barboza, Luís Gabriel A.; Lopes, Clara; Oliveira, Patrícia; Bessa, Filipa; Otero, Vanessa; Henriques, Bruno; Raimundo, Joana; Caetano, MiguelMicroplastics (MP) pollution has received increased attention over the last few years. However, while the number of studies documentating the ingestion of microplastics by fish has increased, fewer studies have addressed the toxicological effects derived from the ingestion of these small items in wild conditions. Here, MP contamination and effect biomarkers were investigated in three commercially important fish...
Purification of mercury-contaminated water using new AM-11 and AM-14 microporou...
Fabre, Elaine; Rocha, Arany; Cardoso, Simão P.; Brandão, Paula; Vale, Carlos; Lopes, Cláudia B.; Pereira, Eduarda; Silva, Carlos M.Water is an essential resource on Earth and the maintenance of its quality led to the incentive of water reuse programmes. Among the most relevant contaminants, mercury is recognized for its toxicity and biomagnifica- tions along the food chain, reason why its removal from aqueous solutions was studied in this essay using two microporous materials for the first time. The ability of a niobium silicate, called AM...
Paralytic shellfish toxin profiles in mussel, cockle and razor shell under post...
Botelho, Maria João; Marques, Filipa; Freitas, Rosa; Pires, Adília; Pereira, Eduarda; Vale, CarlosConcentrations of the paralytic shellfish toxins GTX6, C1+2, GTX5, C3+4, dcSTX, dcNEO and dcGTX2+3 were determined by LC-FLD in composite samples of whole soft tissues of mussels (Mytilus galloprovincialis), cockles (Cerastoderma edule) and razor shells (Solen marginatus) after exposure to a Gymnodinium catenatum bloom. Specimens were harvested weekly during three months under natural depuration conditions in t...
Can contaminated waters or wastewater be alternative sources for technology-cri...
Afonso, Elisabete Luís; Carvalho, Lina; Fateixa, Sara; Amorim, Carlos Oliveira; Amaral, Vitor S.; Vale, Carlos; Pereira, Eduarda; Silva, Carlos ManuelTechnology critical elements (TCE) are considered the vitamins of nowadays technology. Factors such as high demand, limited sources and geopolitical pressures, mining exploitation and its negative impact, point these elements as new emerging contaminants and highlight the importance for removal and recycling TCE from contaminated waters. This paper reports the synthesis, characterization and application of hybr...
Toxicity beyond accumulation of Titanium after a short exposure period of Mytil...
Monteiro, Rui; Costa, Silvana; Coppola, Francesca; Freitas, Rosa; Vale, Carlos; Pereira, EduardaTitanium is the ninth most abundant element in the Earth's crust, being present in rocks, soils, and sediments (Skrabal, 1995; Taylor and McLennan, 1985). Because this element is poorly soluble in water (Knauss et al., 2001; Schmidt and Vogelsberger, 2009), dissolved Ti is usually present at very low concentrations in riverine, estuarine and coastal waters, with concentrations between 0.01 and 5.5 μg L−1 (Skrab...