Evaluation of the rainwater acidity of a rural region due to a coal-fired power plant in Brazil
| Autor: | P. Hama, E.S.K. Dantas, Marcos Lemes, M. Flues, Adalgiza Fornaro |
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| Rok vydání: | 2002 |
| Předmět: |
Atmospheric Science
Sodium Environmental engineering Air pollution chemistry.chemical_element medicine.disease_cause Rainwater harvesting chemistry.chemical_compound Volume (thermodynamics) chemistry Fly ash medicine Environmental science Ammonium Acid rain Coal fired power plant General Environmental Science |
| Zdroj: | Atmospheric Environment. 36:2397-2404 |
| ISSN: | 1352-2310 |
| DOI: | 10.1016/s1352-2310(01)00563-5 |
| Popis: | Rainwater samples (73) of a rural region surrounding a coal plant in the northeast of Parana State (Brazil) were evaluated. Samples of bulk and wet deposition were analysed during a 1-year period (June 1999–June 2000). A large number of rain samples (51) presented pH values below 5.6 (volume weight mean (VWM) was pH=4.7±0.7), indicating that the region rainwater was slightly acidic. The anions and cations concentrations in rainwater samples showed a high sulphate concentration (69 μeq l−1), followed by sodium, calcium and ammonium (35, 32 and 30 μeq l−1, respectively). The analysis of different data of the region indicates that one probable source of the high sodium concentration is fly ash, after the coal burning process. Due to a large contribution of these cations to the sulphate neutralization action, the rainwater of this region displays only a moderate acidity, which does not cause significant environmental impact. |
| Databáze: | OpenAIRE |
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