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

Autor: Padgett, Pamela E.1 ppadgett@fs.fed.us, Bytnerowicz, Andrzej1, Dawson, Philip J.1, Riechers, George H.1, Fitz, Dennis R.2
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Zdroj: Water, Air & Soil Pollution. Jan2004, Vol. 151 Issue 1-4, p35-51. 17p.
Abstrakt: 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. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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