| Popis: |
For a one-week period during July 1981, samples of fine (diameter −3 . A major contribution from a sulfate source, which appears to be coal combustion, was identified. This source is estimated to account for about 50% of the fine mass. Small contributions (less than 10%) from motor vehicles, incineration, fugitive dust and fuel oil combustion were also identified. Organic carbon, not associated with any of the above sources, also accounted for ≈ 10%. The coarse fraction which averaged 25.8 μg m −3 was dominated by crustal material which accounted for about two-thirds of the coarse material. Significant contributions were also identified from motor vehicles (mostly due to reintrained road dust) and iron and steel industry emissions. |
