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| MKOMA,STELYUS L.; ROCHA,GISELE O. DA; DOMINGOS,JOSÉ S.S.; SANTOS,JOÃO V.S.; CARDOSO,MANUELA P.; SILVA,ROGERIO L. DA; ANDRADE,JAILSON B. DE. |
| The coastal atmosphere adjacent to large urban areas can be strongly affected by the emission of air pollutants, among them, major ions species. In this study, the chemical composition and sources of carboxylates and other water-soluble ions in fine and coarse aerosols as well as estimates of particle dry deposition fluxes were studied at a tropical coastal site affected by an urban environment. The mean concentrations of the total carboxylates were 78 ng m–3 in fine fraction and 81 ng m–3 in coarse fraction of particulate matter (PM). The corresponding values for the total inorganic ions were 2143 ng m–3 and 4880 ng m–3 respectively. Main sources for fine particles were:(i) photochemical formation of carboxylic acids in vapor phase and a posterior... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Particle dry deposition; PM; Major ions; Tropical atmosphere; Baia de Todos os Santos bay; Brazil. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100037 |
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| Bertrand, Guillaume; Celle-jeanton, Helene; Laj, Paolo; Rangognio, Jerome; Chazot, Gilles. |
| The present study investigates the chemical composition of wet atmospheric precipitation samples on a daily and an intra-event timescales in Opme, an experimental meteorological station located near Clermont-Ferrand, France. The samples have been collected from November 2005 to October 2007. A total of 217 rainwater samples, integrated for 24 h, were collected and analyzed for pH, conductivity, Na+, K+, Mg2+, NH4 (+) , Ca2+, Cl-, NO (3) (-) , SO (4) (2-) , PO (4) (3-) and HCO3 (-) . The composition of the rainwater collected appeared to be controlled by the following potential sources: neutralisation process (association among calcium, ammonium with nitrate and sulphate), marine and terrestrial sources. In order to determine the role of long-range... |
| Tipo: Text |
Palavras-chave: France; Chemistry; Air mass back trajectories; Sequential sampling; Major ions; Rainwater. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6390.pdf |
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