Composição química da precipitação atmosférica no sul do Brasil: estudo preliminar Chemical composition of atmospheric precipitation in Southern Brazil: preliminary study

• Main Authors: Daniela Montanari Migliavacca, Elba Calesso Teixeira, Andrea Cassia de Melo Machado, Marçal Rodrigues Pires
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2005-06-01
• Series: Química Nova
• Subjects: atmospheric precipitation; acid precipitation; factor analysis
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000300002
• ISSN: 0100-4042; 1678-7064

<abstract language="eng">The present work is a preliminary study of total and wet precipitation in the Candiota region, RS. The samples were collected from January to June 2001 at four different sites. The following variables were analysed: pH, conductivity, alkalinity, Cl-, NO3-, F-, SO4(2-), Na+, K+, Mg2+, NH4+, Ca2+ and Zn, Cu, Fe, Al, Mn. The results showed slightly acidic precipitation and higher concentrations of NH4+, Na+, Cl- and SO4(2-). Factor analysis applied to the variables studied allowed identifying the major sources. Na+, Cl- and Mg2+ have their origin in sea salts and NH4+, Ca2+, K+, SO4(2-) and NO3- are from local anthropogenic sources.