Indoor particle size distributions in homes with open fires and improved Patsari cook stoves
Indoor particle size distributions in homes with open fires and improved Patsari cook stoves
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DOI：
10.1016/j.atmosenv.2010.04.049
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发表时间：
2010-08-01
影响因子：
5
通讯作者：
Masera, Omar R.
中科院分区：
文献类型：
--
作者：
Armendariz-Arnez, Cynthia;Edwards, Rufus D.;Masera, Omar R.
颗粒污染与明火炉灶对健康的不利影响有着明确的联系，室内空气浓度经常被用作健康研究中暴露的替代指标。隐含的假设是，明火和改进炉灶的粒径分布没有显着差异，室内浓度和个人暴露之间的关系是相同的炉灶。为了评估这些假设的影响，室内空气中的颗粒物的尺寸分布进行了测量与Sioutas级联冲击器在家庭使用明火和改进的Patsari炉在农村Purepecha社区在米霍坎，墨西哥。平均室内浓度小于0.25 μ m的颗粒物减少了72%的家庭与改进的Patsari炉，反映了减少贡献的大小部分PM2.5质量浓度从68%到48%。因此，室内PM2.5颗粒物的质量中值直径增加了29%，与明火相比，Patsari改进的炉子（分别从0.42 μ m到0.59 μ m）。在家中使用明火的妇女的个人PM2.5暴露浓度约为室内浓度水平的61%（分别为156 μ g m（-3）和257 μ g m（-3））。相比之下，在使用改良的Patsari炉灶的家庭中，妇女的个人接触浓度是室内空气浓度的77%（分别为78 μ g/m3和101 μ g/m3）。因此，如果在健康和流行病学研究中使用室内空气浓度，如果不考虑不同炉灶类型之间的尺寸分布变化和室内空气浓度与个人暴露浓度之间关系的变化，可能会导致显著偏倚。(C)2010爱思唯尔有限公司版权所有。
Particulate pollution has been clearly linked with adverse health impacts from open fire cookstoves, and indoor air concentrations are frequently used as a proxy for exposures in health studies. Implicit are the assumptions that the size distributions for the open fire and improved stove are not significantly different, and that the relationship between indoor concentrations and personal exposures is the same between stoves. To evaluate the impact of these assumptions size distributions of particulate matter in indoor air were measured with the Sioutas cascade impactor in homes using open fires and improved Patsari stoves in a rural Purepecha community in Michoacan, Mexico. On average indoor concentrations of particles less than 0.25 mu m were 72% reduced in homes with improved Patsari stoves, reflecting a reduced contribution of this size fraction to PM2.5 mass concentrations from 68% to 48%. As a result the mass median diameter of indoor PM2.5 particulate matter was increased by 29% with the Patsari improved stove compared to the open fire (from 0.42 mu m to 0.59 mu m, respectively). Personal PM2.5 exposure concentrations for women in homes using open fires were approximately 61% of indoor concentration levels (156 mu g m(-3) and 257 mu g m(-3) respectively). In contrast personal exposure concentrations were 77% times indoor air concentration levels for women in homes using improved Patsari stoves (78 mu g m(-3) and 101 mu g m(-3) respectively). Thus, if indoor air concentrations are used in health and epidemiologic studies significant bias may result if the shift in size distribution and the change in relationship between indoor air concentrations and personal exposure concentrations are not accounted for between different stove types. (C) 2010 Elsevier Ltd. All rights reserved.