Author(s): S. Shiba; Y. Hirata; S. Yagi
Linked Author(s):
Keywords: No Keywords
Abstract: To investigate the characteristics of acidification of rainwater by washout of gaseous pollutants, a mathematical model based on physico-chemical consideration has been constructed and the acidification process has been simulated numerically. The model deals with the below-cloud scavenging of the pollutant gases, considering the drop-phase chemistry and the mass transfer at the interface between the drop and the atmosphere. The results of the model simulation have disclosed that: (1) in the early stage of acidification bisulfate ion HSO_3~- is the major species to acidify the drop; and (2) with lapse of time SO_4~ (2-) produced by the drop-phase oxidation increases gradually and eventually dominates the raindrop acidity.
Year: 1997