Abstract：
The contribution of volatile chemical products (VCPs) to ambient air pollution has increased following decades of regulating combustion sources. There is a research gap concerning the impact of indoor physicochemical phenomena on VCP emissions. In this work, a bottom-up speciated VCP emission inventory with indoor-outdoor resolution was developed for Canada, an industrialized country with low air pollution levels, whose major cities are among the largest urban areas in North America. VCPs were estimated to account for about 290 kilotons of gaseous organic emissions for a typical year in the 2010s, with more than 60% of emissions occurring indoors. Coatings and cleaners were the most emissive VCP categories. Oxygenated species and saturated aliphatics dominated the chemical profiles of most emissions. Less than 5% of VCP emissions were impacted by indoor physicochemical phenomena. VCP emissions were predicted to account for 0.8-3.2 s-1 of OH reactivity and 0.22-0.52 μg/m3 of secondary organic aerosol formation potential in major urban areas in Canada. Our predictions aligned with previous measurements concerning indoor and outdoor organic pollutant levels, underscoring the important air quality impacts of VCPs relative to other sources. Our results provide helpful insights for future research regarding VCP emissions, especially from indoor spaces.
摘要：
经过数十年的调节燃烧源，挥发性化学产品（VCP）对环境空气污染的贡献有所增加。关于室内物理化学现象对VCP排放的影响存在研究空白。在这项工作中,为加拿大开发了具有室内外分辨率的自下而上的指定VCP排放清单，一个空气污染水平低的工业化国家，其主要城市是北美最大的城市地区之一。据估计，在2010年代的典型年份中，VCP约占290千吨的气态有机排放，超过60%的排放发生在室内。涂料和清洁剂是最具排放性的VCP类别。含氧物种和饱和脂肪族物质主导了大多数排放物的化学特征。不到5％的VCP排放受到室内物理化学现象的影响。在加拿大主要城市地区，VCP排放量预计占OH反应性的0.8-3.2s-1和次要有机气溶胶形成潜力的0.22-0.52μg/m3。我们的预测与先前关于室内和室外有机污染物水平的测量结果一致，强调VCP相对于其他来源的重要空气质量影响。我们的结果为未来有关VCP排放的研究提供了有益的见解，尤其是室内空间。
