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オフィスと学校の微小環境におけるPM、NO、OのI/O比の調査
Investigation of the PM, NO and O I/O ratios for office and school microenvironments.
PMID: 31605869 DOI: 10.1016/j.envres.2019.108791.
抄録
オフィスと学校の微小環境におけるPM(空気力学的直径2.5μm以下の粒子状物質)、NO、O(屋外由来の汚染物質)への曝露量の違いを、室内と屋外のI/O比を統計的に定量化することで検討した。そのために、HEALS EDMSデータベース、特にOFFICAIRとSINPHONIE EUプロジェクトのデータから屋内外の観測データを取得しました。これらのI/O比を作成し、統計的に分析することで、屋外からの汚染物質に対する室内環境の影響を調べることができた。この統計的アプローチでは、各汚染物質について調査した2つの微小環境間のI/O比の違いも明らかにした。上記の汚染物質への曝露量を推定するために、確率分布と累積分布関数(pdf/cdf)を経験的に近似した結果、オフィスではPMのI/O比は正規分布に従うが、NOとOはガンマ分布に従うという結論に達した。一方、学校では、すべての汚染物質のI/O比は対数正規分布に従う。
Differentiation of the exposure to PM (particulate matter less than 2.5 μm in aerodynamic diameter), NO and O i.e. pollutants of outdoor origin, due to the occupation of office and school microenvironments, was investigated through the quantification of the respective Indoor to Outdoor (I/O) ratios, in simple statistical terms. For that cause, indoor and outdoor observation data were retrieved from the HEALS EDMS database, and more specifically the data from the OFFICAIR and the SINPHONIE EU projects. The I/O ratios were produced and were statistically analyzed in order to be able to study the influence of the indoor environment against the pollutants coming from outdoors. The present statistical approach highlighted also the differences of I/O ratios between the two studied microenvironments for each pollutant. For exposure estimation to the above-mentioned pollutants, the probability and cumulative distribution function (pdf/cdf) empirical approximations led to the conclusion that for offices the I/O ratios of PM follow a normal distribution, while NO and O a gamma distribution. Respectively, for schools the I/O ratios of all pollutants follow a lognormal distribution.
Copyright © 2019 Elsevier Inc. All rights reserved.