Quantifying the contribution of ambient and indoor-generated fine particles to indoor air in residential environments
Quantifying the contribution of ambient and indoor-generated fine particles to indoor air in residential environments
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DOI：
10.1111/ina.12084
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发表时间：
2014-08-01
期刊：
影响因子：
5.8
通讯作者：
Wheeler, A. J.
中科院分区：
文献类型：
--
作者：
MacNeill, M.;Kearney, J.;Wheeler, A. J.
室内细颗粒物 (FP) 是渗入室内的环境颗粒物和烹饪等活动在室内产生的颗粒物的组合。本文的目的是估计室内 FP 的渗透因子 (F-inf) 和环境/非环境成分。为此，我们使用 DustTrak (TSI Inc) 光度计在夏季和冬季对新斯科舍省哈利法克斯的 50 个无烟家庭连续 7 天在室内和室外进行了连续测量。此外，使用哈佛冲击器 (HI) 对每个家庭每 24 小时进行室内和室外重力测量。开发了一种计算机算法来消除（审查）室内源造成的峰值。然后使用删失的室内/室外比率来估计每日 F(inf)s 并确定室内总浓度的环境和非环境成分。哈利法克斯的 F-inf 估计值（夏季每日中位数 = 0.80；冬季每日中位数 = 0.55）高于加拿大其他地区的报告。在冬季和夏季，大部分 FP 均来自环境（冬季每日中位数 = 59%；夏季每日中位数 = 84%）。非环境成分的预测因素包括各种烹饪变量、燃烧源、相对湿度和影响通风的因素。这项工作强调了一个事实，即区域因素可以影响环境颗粒对室内住宅浓度的贡献。
Indoor fine particles (FPs) are a combination of ambient particles that have infiltrated indoors, and particles that have been generated indoors from activities such as cooking. The objective of this paper was to estimate the infiltration factor (F-inf) and the ambient/non-ambient components of indoor FPs. To do this, continuous measurements were collected indoors and outdoors for seven consecutive days in 50 non-smoking homes in Halifax, Nova Scotia in both summer and winter using DustTrak (TSI Inc) photometers. Additionally, indoor and outdoor gravimetric measurements were made for each 24-h period in each home, using Harvard impactors (HI). A computerized algorithm was developed to remove (censor) peaks due to indoor sources. The censored indoor/outdoor ratio was then used to estimate daily F(inf)s and to determine the ambient and non-ambient components of total indoor concentrations. F-inf estimates in Halifax (daily summer median = 0.80; daily winter median = 0.55) were higher than have been reported in other parts of Canada. In both winter and summer, the majority of FP was of ambient origin (daily winter median = 59%; daily summer median = 84%). Predictors of the non-ambient component included various cooking variables, combustion sources, relative humidity, and factors influencing ventilation. This work highlights the fact that regional factors can influence the contribution of ambient particles to indoor residential concentrations.