Composição química da precipitação atmosférica no sul do Brasil: estudo preliminar

Química Nova

Daniela Montanari Migliavacca²  Elba Calesso Teixeira²  Andrea Cassia De Melo Machado²  Marçal Rodrigues Pires¹ 

[1] ,Fundação Estadual de Proteção AmbientalPorto Alegre RS

关键词: atmospheric precipitation;    acid precipitation;    factor analysis;   

DOI  :  10.1590/S0100-40422005000300002

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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