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
ISSN1600-0889
AutoresEugenio Sanhueza, Wolfgang Elbert, Alberto Rondón, M. Corina Arias, Mariela Hermoso,
Tópico(s)Water Quality and Pollution Assessment
ResumoIn 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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