Institut National de l'Environnement Industriel et des risques (INERIS), Parc Technologique ALATA BP 2, Verneuil en Hallatte, France.
Indoor Air. 2010 Apr;20(2):147-58. doi: 10.1111/j.1600-0668.2009.00634.x.
The potential health effects of fine and ultrafine particles are of increasing concern. A better understanding of particle characteristics and dispersion behavior is needed. This study aims at characterizing spatial and temporal variations in fine and ultrafine particle dispersion after emission from a model source in an experimental house. Particles emitted by an incense stick burning for 15 min were characterized. Number concentration, specific surface area and mass were measured. Partial chemical analysis of particles was also realized. Near the burning incense stick, the maximum concentration was 25,500 particles/cm(3); the indoor PM(2.5) concentration reached 197 microg/m(3), and the specific surface area concentration was 180 microm(2)/cm(3). The estimated incense smoke density was 1.1 g/cm(3). Time of Flight Aerosol Mass Spectrometer measurements indicated that the organic fraction was predominant in the aerosol mass detected, and other minor components identified were K(+), NO(3)(-), and Cl(-). The combustion of an incense stick in the living room was associated with significant modifications of the concentrations of particles measured in the different rooms of the house. This demonstration of pollution by particle dispersion by a model source of moderate intensity may have significant implications in terms of assessment of indoor exposure to such particles. Practical Implications The particles emitted in a domestic environment by a source of moderate intensity such as burning incense disperse throughout the house, even in rooms with closed doors and in rooms as far away as the next floor. This dispersion has significant implications in terms of evaluating human indoor exposure to fine and ultrafine particles.
细颗粒物和超细颗粒物对健康的潜在影响引起了越来越多的关注。需要更好地了解颗粒物的特性和分散行为。本研究旨在描述从实验室内模型源排放后细颗粒物和超细颗粒物的分散的时空变化。对燃烧 15 分钟的香的颗粒物进行了特征描述，测量了其数浓度、比表面积和质量，还进行了颗粒物的部分化学分析。在燃烧香的附近，最大浓度达到 25500 个/立方厘米；室内 PM2.5 浓度达到 197 微克/立方米，比表面积浓度为 180 微米/立方厘米。估算的香烟雾密度为 1.1 克/立方厘米。飞行时间气溶胶质谱仪测量表明，气溶胶质量中以有机部分为主，其他鉴定出的次要成分是 K(+)、NO3(-)和 Cl(-)。在客厅燃烧香会导致室内不同房间测量到的颗粒物浓度显著变化。这种由中度强度的模型源引起的颗粒物分散污染的演示可能会对评估室内暴露于此类颗粒物的风险产生重大影响。实际意义 家中中度强度的燃烧香这样的源排放的颗粒物会在整个房间内分散，即使是在关闭门窗的房间和远在隔壁楼层的房间内也是如此。这种分散对评估人类室内暴露于细颗粒物和超细颗粒物有重要意义。
