Artigo Acesso aberto Revisado por pares

Organic and inorganic acids in rain from a remote site of the Venezuelan savannah

1989; Taylor & Francis; Volume: 41; Issue: 2 Linguagem: Inglês

10.3402/tellusb.v41i2.15066

ISSN

1600-0889

Autores

Eugenio Sanhueza, Wolfgang Elbert, Alberto Rondón, M. Corina Arias, Mariela Hermoso,

Tópico(s)

Water Quality and Pollution Assessment

Resumo

In this paper, we report the chemical characterization of rain events collected at a remote site in the Venezuelan savannah. The volume-weighted average pH was 4.7. In most of the samples over 60% of the free acidity may be due to formic and acetic acids. Sulphuric and nitric acids only contribute with ∼40%. The potential contribution of HCl is relatively high, up to 16%. Ammonium ion concentrations were lower than the values observed in other natural tropical ecosystems. Rain samples collected during the period of vegetation burning show less free acidity (pH ≤ 5.3) and higher concentration of all the ions than those collected in the non-burning periods.

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