Residential wood stove use and indoor exposure to PM2.5 and its components in Northern New England
Residential wood stove use and indoor exposure to PM2.5 and its components in Northern New England
复制标题
DOI：
10.1038/s41370-019-0151-4
复制
发表时间：
2020-03-01
影响因子：
4.5
通讯作者：
Karagas, Margaret R.
中科院分区：
文献类型：
--
作者：
Fleisch, Abby F.;Rokoff, Lisa B.;Karagas, Margaret R.
背景住宅用木炉在高收入国家已经变得更加普遍，但关于室内暴露于PM2.5及其成分的数据有限。方法从2014年到2016年，我们使用微环境监测仪采集了新英格兰北部137个孕妇家庭的7天室内空气样本。我们研究了木炉使用与PM2.5质量及其成分[黑碳(BC)、有机碳和元素碳及其部分，以及微量元素]的关系，并根据采样季节、社区木炉使用和室内活动进行了调整。我们检查了炉龄、EPA认证和木材湿度对室内污染物的影响。结果中位数(IQR)家庭PM2.5为6.65(5.02)µg/m(3)，BC为0.23(0.20)µg/m(3)。30%的家庭在监测期间使用了木炉子。在有炉子的家庭中，PM2.5比没有炉子的家庭高20.6%[尽管95%的可信区间(-10.662.6)包括零]，BC高61.5%(95%可信区间：11.6,133.6)。在有炉子的家庭中，元素碳(总和组分3和4)、钾、钙和氯化物的含量也较高。较老的炉灶、未经EPA认证的炉灶以及湿木材或混合木材(与干木材相比)与较高的污染物浓度有关，尤其是BC。结论有木材炉具的家庭，特别是那些较老的、未经EPA认证的家庭或燃烧湿木材的家庭，室内空气燃烧相关污染物浓度较高。
Background Residential wood stove use has become more prevalent in high-income countries, but only limited data exist on indoor exposure to PM2.5 and its components. Methods From 2014 to 2016, we collected 7-day indoor air samples in 137 homes of pregnant women in Northern New England, using a micro-environmental monitor. We examined associations of wood stove use with PM2.5 mass and its components [black carbon (BC), organic and elemental carbon and their fractions, and trace elements], adjusted for sampling season, community wood stove use, and indoor activities. We examined impact of stove age, EPA-certification, and wood moisture on indoor pollutants. Results Median (IQR) household PM2.5 was 6.65 (5.02) mu g/m(3) and BC was 0.23 (0.20) mu g/m(3). Thirty percent of homes used a wood stove during monitoring. In homes with versus without a stove, PM2.5 was 20.6% higher [although 95% confidence intervals (-10.6, 62.6) included the null] and BC was 61.5% higher (95% CI: 11.6, 133.6). Elemental carbon (total and fractions 3 and 4), potassium, calcium, and chloride were also higher in homes with a stove. Older stoves, non-EPA-certified stoves, and wet or mixed (versus dry) wood were associated with higher pollutant concentrations, especially BC. Conclusions Homes with wood stoves, particularly those that were older and non-EPA-certified or burning wet wood had higher concentrations of indoor air combustion-related pollutants.