Effect of Penetration Factor, Deposition, and Environmental Factors on the Indoor concentration of PM23.5 Sulfate, Nitrate, and Carbon.

Thatcher, T. L. ; Lunden, M. M. ; Sextro, R. G. ; Hering, S. ; Brown, N. J.

Technical Information Center Oak Ridge Tennessee

关键词: Indoor air pollution;    Air pollution control;    Concentration(Composition);    Sulfates;    Nitrates;   

RP-ID  :  DE2004820649

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Indoor exposure to particles of outdoor origin constitutes an important exposure pathway. We conducted an intensive set of indoor particle measurements in an unoccupied house under differing operating conditions. Real-time measurements were conducted both indoors and outdoors, including PM2.5 nitrate, sulfate, and carbon. Because the time-scale of the fluctuations in outdoor particle concentrations and meteorological conditions are often similar to the time constant for building air exchange, a steady state concentration may never be reached. The time-series experimental data were used to determine the effect of changes in air exchange rate and indoor/outdoor temperature and relative humidity differences on indoor particle concentrations. A multivariate regression was performed to investigate the difference between measured indoor concentrations and results from a simple time-dependent physical model. Environmental conditions had a significant effect on indoor concentrations of all three PM2.5 species, but did not explain all of the model variation.