Abstract
The major part of Venezuela oil production is located in and around the Lake Maracaibo Basin. The samples were collected over a 1-year period at Catatumbo and La Esperanza sites. The rainwater was acidic, with a VWA-pH of 4.6 for Catatumbo and 4.2 for La Esperanza. This acidity is made up in 93% by inorganic acids (mainly H2SO4), and NH4 + is the major cation which buffer the acidity of precipitation. An excess of sulfate (SO2 *) > 96% was obtained in both sites. Correlation analysis shows that H+ is strongly correlated with SO4 x. Anthropogenic air pollution from oil fields (H2S) and the burning of sulphur-bearing fuels (SO2) are probably the dominant sources; however, the lack of correlation between the H+ and NO3 − levels would appear to indicate that the SO4 * is also of biogenic origin (H2S-DMS from Sinamaica Lagoon-Lake Maracaibo- and the Caribbean). Statistical analysis of the pooled data indicated that the concentration differences between Catatumbo and La Esperanza sites are not significant at 99% confidence level.
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Andreae, M.O., Talbot, R.W., Andreae, T.W., Harriss, R.C.: 1988,J. Geophys. Res. 93, 1616–1624.
Andreae, M.O., Talbot, R.W., Berreshein, K.M., Beecher, K.M., Li, S.M.:1990,J. Geophys Res. 95D, 16987–16999.
Ayers, G.P., Gillet, R.: 1988, In: Rhode, H., Herrera, R., Eds.:Acidification in tropical countries, SCOPE36, 347–402. John Wiley and Sons, Chichester, England.
Cardenas, L., Rondon, A., Johansson, C., Sanhueza, E.: 1993,J. Geophys. Res. 98, 14783–14790.
Galloway, J.N., Likens, G.E., Keene, W.C. and Miller, J.M.: 1982,J. Geophys. Res. 87, 8771–8786.
Keene, W.C., Galloway, J.N., Holden Jr., J.D.: 1983,J. Geophys. Res. 88, 5122–5130.
Keene, W.C., Galloway, J.N.: 1986,J. Geophys. Res. 91, 14466–14474.
Lewis Jr., W.M.: 1981,Water Resources Res. 17, 169–181.
Likens, G.E., Keene, W.C., Miller, J.M., Galloway, J.N.: 1987,J. Geophys. Res. 92, 13299–13314.
Morales, J.A., L. de Medina, H., G. de Nava, M., Velasquez, H., Santana, M.: 1994, J. of Chromatography,A671, 193–196.
Sanhueza, E., Cuenca, G., Gomez, J.M. et al.: 1988, In: Rhode, H., Herrera, R., Eds.,Acidification in tropical countries, SCOPE,36, 197–248, John Wiley and Sons, Chichester, England.
Sanhueza, E., Arias, M.C., Donoso, L. et al.: 1994,Tellus,44B, 54–62.
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Morales, J.A., Bifano, C. & Escalona, A. Rainwater chemestry at the western savannah region of the Lake Maracaibo Basin, Venezuela. Water Air Soil Pollut 85, 2325–2330 (1995). https://doi.org/10.1007/BF01186181
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DOI: https://doi.org/10.1007/BF01186181