The role of free fall atmospheric dust in catalysing autoxidation of aqueous sulphur dioxide
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Transition metals and water-soluble ions in deposits on a building and their potential catalysis of stone decay
2008, Atmospheric EnvironmentCitation Excerpt :These clay size dusts also travel longer distances and collect more pollutants and become more soluble (Bauer and Koch, 2005). Mechanisms for the oxidation of, for example, S(IV) oxides (SO2 (aq), HSO3−, SO32−) include surface catalysis (heterogeneous) and leached metal ion (homogeneous) reactions (Prasad et al., 1992; Rani et al., 1992; Madnawat et al., 1993). These very fine dust particles containing primary minerals, aluminosilicates, oxyhydroxides, calcite and organic material provide a support that could promote catalytic activity.
Estimation of SO<inf>4</inf> contribution by dry deposition of SO<inf>2</inf> onto the dust particles in India
2003, Atmospheric EnvironmentThe effects of volcanic ash on COSPEC measurements
2001, Journal of Volcanology and Geothermal ResearchCitation Excerpt :SO2 oxidation in volcanic plumes also decreases plume SO2 concentrations. The rate at which oxidation occurs is dependent upon many variables: relative humidity, ash content, ash composition and ambient air composition (Gallagher et al., 1990; Fung et al., 1991; Grgić et al., 1991; Hansen et al., 1991; Joos and Baltensperger, 1991; Bluth et al., 1992; Facchini et al., 1992; Rani et al., 1992). Measured SO2 oxidation rates in a volcanic plume from Mount Etna, Italy, range from 3 to 14% per hour (Martin et al. 1986).
Dry deposition of sulphate and nitrate to polypropylene surfaces in a semi-arid area of India
1997, Atmospheric EnvironmentCharacterization of precipitation at Agra
1996, Atmospheric EnvironmentRole of surface and leached metal ion catalysis in autoxidation of sulphur(IV) in power plant flyash suspensions
1993, Atmospheric Environment Part A, General Topics