Design, Evaluation and Application of a Continuously Stirred Tank Reactor System for Use in NitricAcid Air Pollutant Studies

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• 作者：Padgett ; Pamela E. ; Bytnerowicz ; Andrzej ; Dawson ; Philip J. ; Riechers ; George H. ; Fitz ; Dennis R.
• 关键词：air pollution ; dry deposition ; fumigation studies ; nitrogen deposition
• 刊名：Water, Air, and Soil Pollution
• 出版年：2004
• 出版时间：2004
• 年：2004
• 卷：151
• 期：1/4
• 页码：35-51
• 全文大小：179 KB

文摘

Nitric acid (HNO₃) vapor is a significant component of air pollution. Dry deposition of HNO₃ is thought to be a major contributor to terrestrial loading of anthropogenically-derived nitrogen (N), but many questions remain regarding the physico-chemical process of deposition and the biological responses to accumulation of dry-deposited HNO₃ on surfaces. To examine these processes experimentally, a continuously stirred tank reactor (CSTR) fumigation system has been constructed. This system enables simultaneous fumigation at several concentrations in working volumes 1.3 m dia by 1.3 m ht, allowing for simultaneous fumigation of many experimental units. Evaluation of the system indicates that it is appropriate for long-term exposures of several months duration and capable of mimicking patterns of diurnal atmospheric HNO₃ concentrations representative of areas with different levels of pollution.