Results of a residential indoor PM2.5 sampling program before and after a woodstove changeout
Results of a residential indoor PM2.5 sampling program before and after a woodstove changeout
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DOI：
10.1111/j.1600-0668.2008.00541.x
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发表时间：
2008-10-01
期刊：
影响因子：
5.8
通讯作者：
Noonan, C.
中科院分区：
文献类型：
--
作者：
Ward, T.;Noonan, C.
2005 年至 2007 年期间，落基山脉山谷社区实施了一项柴炉更换计划，旨在降低环境中 PM(2.5) 的水平。除了环境 PM(2.5) 的变化之外，还提供了评估旧炉灶更换为美国环境保护署 (EPA) 认证的木炉时室内空气质量变化的机会。在更换之前和之后，对 16 个家庭进行了 PM(2.5) 样本测量。对于每个采样事件，在整个 24 小时采样期间连续测量 PM(2.5) 质量，并通过石英过滤器测量有机/元素碳 (OC/EC) 和木烟的相关化学标记物。结果显示，平均 PM(2.5) 浓度和最大 PM(2.5) 浓度分别降低了 71% 和 76%（由 TSI DustTraks 测量）。引入新木炉后，左旋葡聚糖减少了 45%。然而，随着新木炉的引入，树脂酸（木材树皮中发现的天然化学物质）的浓度增加了。甲氧苯酚水平没有明显的趋势，可能是由于所测量的物种具有半挥发性。尽管本研究中关于环境 PM 渗入室内环境的量存在一些不确定性，但这些研究结果表明，这种干预措施对室内空气质量产生了很大影响。
During 2005-2007, a woodstove changeout program was conducted in a Rocky Mountain valley community in an effort to reduce ambient levels of PM(2.5). In addition to changes in ambient PM(2.5), an opportunity was provided to evaluate the changes in indoor air quality when old stoves were replaced with US Environmental Protection Agency (EPA)-certified woodstoves. PM(2.5) samples were measured in 16 homes prior to and following the changeout. For each sampling event, PM(2.5) mass was continuously measured throughout the 24-h sampling periods, and organic/elemental carbon (OC/EC) and associated chemical markers of woodsmoke were measured from quartz filters. Results showed that average PM(2.5) concentrations and maximum PM(2.5) concentrations were reduced by 71% and 76%, respectively (as measured by TSI DustTraks). Levoglucosan was reduced by 45% following the introduction of the new woodstove. However, the concentrations of resin acids, natural chemicals found in the bark of wood, were increased following the introduction of the new woodstove. There were no discernible trends in methoxphenol levels, likely due to the semi-volatile nature of the species that were measured. Although there is some uncertainty in this study regarding the amount of ambient PM infiltration to the indoor environment, these findings demonstrated a large impact on indoor air quality following this intervention.