Study of chemical elements in atmospheric precipitation in South Brazil

Migliavacca, Daniela Montanari; Teixeira, Elba Calesso; Pires, Marçal; Fachel, Jandyra Maria Guimarães

doi:10.1016/j.atmosenv.2003.11.040

Cited by 89 publications

(66 citation statements)

References 25 publications

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“…4a). These concentrations were similar to those reported in other studies done in the same area, although the samples were collected differently (Migliavacca et al 2004a). These elements and others which have a major crustal component tend to have a lower solubility, although they show a variable characteristic in the precipitation (Spokes and Jickels 1995).…”

Section: Major Ionssupporting

confidence: 80%

“…The average values for conductivity were similar to those found in other studies done on the same area, not showing significant variation (Migliavacca et al 2004a(Migliavacca et al , 2005.…”

Section: Major Ionssupporting

confidence: 78%

“…This contribution could be explained mainly by Na + and Cl − , originating in maritime tropical air and maritime polar air masses that exert influence on the area , Mello 2001, Lara et al 2001). Other studies done in Candiota have shown the maritime contribution on this area (Migliavacca et al 2004a, Braga et al 2004). This last author demonstrated the influence of the sea breeze of SW direction in relation to the emission source, which is confirmed through the findings of the present study.…”

Section: Major Ionsmentioning

confidence: 99%

“…As Candiota is an agricultural area, the use of fertilizers and animal excrements may have contributed to NH + 4 increase. The high biogenic activity may be the cause for the relatively high load of NH + 4 and K + (Migliavacca et al 2004a(Migliavacca et al , 2005. The presence of ions NO − 3 e SO 2− 4 is characteristic of anthropogenic influence, probably the contribution of the power plants.…”

Section: Major Ionsmentioning

confidence: 99%

“…Studies on acid rain done in the area and other areas further south near coal fired power plants, showed significant concentrations of sulfate in deposition samples (Migliavacca et al 2004a, Fiedler et al 1990). …”

Section: Major Ionsmentioning

confidence: 99%

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Study of wet precipitation and its chemical composition in South of Brazil

Teixeira

Migliavacca

Filho

et al. 2008

An. Acad. Bras. Ciênc.

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The purpose of this study is to analyze the chemical composition of wet precipitation in samples collected at three stations in the Candiota region in the Brazilian state of Rio Grande do Sul (RS). Samples were collected in 2004. Variables analyzed in wet precipitation were pH, conductivity, and concentration of Cl − , NO − 3 , SO 2− 4 F − , Na + , Ca 2+ , Mg 2+ , K + , NH + 4 , Cu, Zn, Fe, Mn, Pb, Ni, Cd, Co, and Cr. SO 2 and NO 2 distribution over the time were also evaluated. Results have showed that pH < 5.6 are found mostly at Candiota airport (85%), followed by Aceguá (72%) and Três Lagoas (65%). Enrichment Factor of the studied ions in wet deposition revealed higher Ca 2+ and SO 2− 4 enrichment in Três Lagoas. Factor Analysis applied to metals and major ions allowed identifying the major sources. While Cl − , Na + , Mg 2+ are of marine origin, SO 2− 4 , NO − 3 , NH + 4 , F − come from anthropogenic sources. Except for Fe and Mn originating from the soil dust, the metals studied showed to have anthropogenic influence The average SO 2 and NO 2 concentration, as well as SO 2− 4 and NO − 3 in wet precipitation in the Candiota region showed higher concentrations during the warmer months.

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Section: Major Ionssupporting

confidence: 80%

Section: Major Ionssupporting

confidence: 78%

Section: Major Ionsmentioning

confidence: 99%

Section: Major Ionsmentioning

confidence: 99%

Section: Major Ionsmentioning

confidence: 99%

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