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Identification of submicrometer coal fly ash in a high-sulfate episode at Whiteface Mountain, New York

1985; Elsevier BV; Volume: 19; Issue: 2 Linguagem: Inglês

10.1016/0004-6981(85)90096-4

1878-2442

James S. Webber, Vincent A. Dutkiewicz, Liaquat Husain,

Mine drainage and remediation techniques

The most direct evidence yet of a coal-burning source of a high-sulfate air mass reaching the Northeast has been detected in a brief episode at Whiteface Mountain, NY, on 23 June 1983. Individual microparticles were characterized by electron microscopy in three samples from this period: 12 h before the SO2−4 peak ([SO2−4] = 2.7 μg m −3), during the peak (24 μg m −3) and 12 h after the peak (2.2 μg m −3). This analysis provided the first confirmation of the association of coal fly ash and high [SO2−4] at a rural acid-stressed site. Common at the time of peak [SO 2−4] were sub-μm magnetite and glass spheres as identified by morphology, elemental composition and mineralogy. This coal fly ash was essentially absent 12 h before or 12 h after the episode. A midwestern source of this episode was indicated by Mn/V ratios and by meteorologic conditions.