10 documents found, page 1 of 1
Exploratory study of gaseous pollutants in primary schools in Luanda
Alves, Célia Anjos; Cipoli, Yago; Vicente, Estela; Ituamba, Joaquim; Leitão, Anabela 1.390 / 5.000 In several classrooms and in the outdoor courtyards of four primary schools in Luanda, a preliminary study was carried out involving monitoring by passive methods of various gaseous pollutants: benzene, toluene, ethylbenzene and xylenes (BTEX), ozone (O3), nitrogen dioxide ( NO2) and carbonyl compounds. The concentrations...
PM2.5 chemical composition and health risks by inhalation near a chemical complex
Alves, Célia; Evtyugina, Margarita; Vicente, Estela; Vicente, Ana; Rienda, Ismael Casotti; Sánchez de la Campa, Ana; Tomé, Mário; Duarte, IolaParticulate matter (PM2.5) samples were collected in the vicinity of an industrial chemical pole and analysed for organic and elemental carbon (OC and EC), 47 trace elements and around 150 organic constituents. On average, OC and EC accounted for 25.2% and 11.4% of the PM2.5 mass, respectively. Organic compounds comprised polycyclic aromatic hydrocarbons (PAHs), alkylated PAHs, anhydrosugars, phenolics, aromati...
Outdoor charcoal grilling: particulate and gas-phase emissions, organic speciat...
Alves, Célia A.; Evtyugina, Margarita; Vicente, Estela; Vicente, Ana; Gonçalves, Cátia; Neto, Ana Isabel; Nunes, Teresa; Kováts, NoraCharbroiling is a major source of air pollution worldwide. In this study, the particulate and gas-phase emissions from the charcoal lighting phase and during the grilling of meat (pork and rump cap) and fish (sardine and salmon) on an outdoor barbecue grill were characterized. Some gaseous compounds (ethane, hexane, NO2, N2O, SO2, NH3, HCl) did not display significant variations between samples and the backgrou...
Loading rates of dust and bioburden in dwellings in an inland city of Southern ...
Viegas, Carla; Dias, Marta; Almeida, Beatriz; Vicente, Estela; Candeias, Carla; Caetano, Liliana Aranha; Carolino, Elisabete; Alves, CéliaSampling campaigns indoors have shown that occupants exposed to contaminated air generally exhibit diverse health outcomes. This study intends to assess the deposition rates of total settleable dust and bioburden in the indoor air of dwellings onto quartz fiber filters and electrostatic dust collectors (EDCs), respectively. EDC extracts were inoculated onto malt extract agar (MEA) and dichloran glycerol (DG18) ...
Morphological properties, chemical composition, cancer risks and toxicological ...
Alves, Célia; Rienda, Ismael Casotti; Vicente, Ana; Vicente, Estela; Gonçalves, Cátia; Candeias, Carla; Rocha, Fernando; Lucarelli, FrancoFrom a sampling campaign from December 2018 to June 2019, at a traffic and an urban background site in Coimbra, Portugal, two particulate matter (PM10) samples from each month were selected to characterise the morphology by scanning electron microscopy, to determine the organic and inorganic chemical composition by multiple analytical techniques and to assess the ecotoxicity by the Vibrio fischeri bioluminescen...
Settleable dust and bioburden in Portuguese dwellings
Viegas, Carla; Dias, Marta; Almeida, Beatriz; Vicente, Estela; Aranha Caetano, Liliana; Carolino, Elisabete; Alves, CéliaMonitoring campaigns in several buildings have shown that occupants exposed to contaminated indoor air generally exhibit diverse health symptoms. This study intends to assess settleable dust loading rates and bioburden in Portuguese dwellings by passive sampling onto quartz fiber filters and electrostatic dust cloths (EDCs), respectively. Settled dust collected by EDCs was analyzed by culture-based methods (inc...
Geochemical, mineralogical and morphological characterisation of road dust and ...
Candeias, Carla; Vicente, Estela; Tomé, Mário; Rocha, Fernando; Ávila, Paula Freire; Alves, CéliaABSTRACT: Road dust resuspension, especially the particulate matter fraction below 10 mu m (PM10), is one of the main air quality management challenges in Europe. Road dust samples were collected from representative streets (suburban and urban) of the city of Viana do Castelo, Portugal. PM10 emission factors (mg veh(-1) km(-1)) ranging from 49 (asphalt) to 330 (cobble stone) were estimated by means of the Unite...
Bioburden characterization in Portuguese dwellings
Viegas, Carla; Sá, Flávio; Mateus, Margarida; Santos, Patrícia; Monteiro, Ana; Faria, Tiago; Caetano, Liliana Aranha; Carolino, ElisabeteSeveral studies have indicated that bioburden presence in the indoor environment is associated with serious health effects. Passive sampling methods are easy to use and represent a long-term integrated sample. This study intended to characterize bioburden and assess the azole-resistant fungi through electrostatic dust cloth from 23 dwellings from Aveiro.
Passive monitoring of particulate matter and gaseous pollutants in Fogo Island,...
Alves, Célia; Candeias, Carla; Nunes, Teresa; Tomé, Mário; Vicente, Estela; Ávila, Paula Freire; Rocha, FernandoABSTRACT: An air quality monitoring campaign by passive sampling techniques was carried out, for the first time, between November 2016 and January 2017 on the Cape Verdean island of Fogo, whose volcanic mountain rises up to 2829 m. Levels of SO2 and acid gases (HF, HCl, HNO3, H2SO4 and H3PO4) were, in most cases, below the detection limits. Alkylpentanes, hexane, cycloalkanes and toluene were the dominant volat...
Volatile organic compounds emitted by the stacks of restaurants
Alves, Célia A.; Evtyugina, Margarita; Cerqueira, Mário; Nunes, Teresa; Duarte, Márcio; Vicente, EstelaVolatile organic compound (VOC) samples were collected from the exhaust stacks on the roofs of a university canteen, a charcoal-grilled chicken restaurant and a woodoven roasted piglet restaurant on sorbent tubes with Carbopack B and C packing and analysed by thermal desorption-gas chromatography-flame ionisation detection. Concurrent sampling of carbonyls was also conducted using 2,4-dinitrophenylhydrazine car...