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SOA in newly decorated residential buildings

机译：新装修住宅中的SOA

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Secondary organic aerosols (SOA) are products of the reaction of reactive organic gases (ROGs) and ozone. Most SOA are in the nanometer or submicron range, and thus SOA may be harmful to human health. Concentrations of ROGs may be high in newly decorated rooms, which may result in high SOA concentrations, especially during seasons with high ozone concentration. The objective of this study was to investigate the concentrations of SOA and the extent to which SOA contribute to indoor PM2.5 concentrations in newly decorated residential buildings. We measured concentrations of ROGs in 24 rooms of eight newly decorated (within the preceding three months) residential buildings in Beijing, China. Using previously measured indoor ozone decay rates, air change rates, and corresponding monitored ozone concentrations, we estimated the indoor ozone concentrations for the newly decorated rooms. Subsequently SOA concentrations were calculated using an aerosol mass fraction (AMF) model. We further estimated the fractions of SOA concentrations in indoor PM2.5. The SOA concentrations in 18 of the rooms ranged from 0.88 to 18.18 mu g/m(3), contributing to between 3.77% and 78.57% of indoor PM2.5 concentrations. The other six rooms had much lower SOA concentrations, less than 0.1 mu g/m(3), contributing to less than 0.39% of indoor PM2.5 concentrations. The results indicate that the concentrations and contribution of SOA in most newly decorated residential rooms are much higher than those in rooms with long-term occupancy, while some newly decorated rooms can still have low SOA concentrations. (C) 2016 Elsevier Ltd. All rights reserved.
机译：次级有机气溶胶（SOA）是反应性有机气体（ROG）与臭氧反应的产物。大多数SOA都在纳米或亚微米范围内，因此SOA可能对人体健康有害。新装修房间中ROG的浓度可能很高，这可能导致SOA浓度很高，尤其是在臭氧浓度较高的季节。这项研究的目的是调查新装修住宅建筑中SOA的浓度以及SOA对室内PM2.5浓度的贡献程度。我们测量了中国北京八座新装修（在过去三个月内）住宅楼的24个房间中的ROG浓度。使用先前测量的室内臭氧衰减率，换气率和相应的监测臭氧浓度，我们估算了新装修房间的室内臭氧浓度。随后，使用气溶胶质量分数（AMF）模型计算SOA浓度。我们进一步估算了室内PM2.5中SOA浓度的比例。 18个房间的SOA浓度范围为0.88至18.18μg / m（3），占室内PM2.5浓度的3.77％至78.57％。其他六个房间的SOA浓度要低得多，小于0.1μg / m（3），占室内PM2.5浓度的比例不到0.39％。结果表明，大多数新装修的住宅房间中SOA的浓度和贡献远高于长期居住的房间，而一些新装修的房间中SOA浓度仍然较低。 （C）2016 Elsevier Ltd.保留所有权利。

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