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Environ Pollut

Title:		Quantifying source contributions for indoor CO(2) and gas pollutants based on the highly resolved sensor data
Author(s):		Shen G; Ainiwaer S; Zhu Y; Zheng S; Hou W; Shen H; Chen Y; Wang X; Cheng H; Tao S;
Address:		"College of Urban and Environmental Sciences, Laboratory for Earth Surface Processes, Sino-French Institute for Earth System Science, Peking University, Beijing, 100871, China. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, 30332, USA. College of Urban and Environmental Sciences, Laboratory for Earth Surface Processes, Sino-French Institute for Earth System Science, Peking University, Beijing, 100871, China. Electronic address: taos@pku.edu.cn"
Journal Title:		Environ Pollut
Year:		2020
Volume:		20200827
Issue:
Page Number:		115493 -
DOI:		10.1016/j.envpol.2020.115493
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Household air pollution is the dominant contributor to population air pollutant exposure, but it is often of less concern compared with ambient air pollution. One of the major knowledge gaps in this field are detailed quantitative source contributions of indoor pollutants, especially for gaseous compounds. In this study, temporally, spatially, and vertically resolved monitoring for typical indoor gases including CO(2), CO, formaldehyde, methane, and the total volatile organic compounds (VOCs) was conducted to address pollution dynamics and major sources in an urban apartment. The indoor concentrations were significantly higher than the simultaneously measured outdoor concentrations. A new statistic approach was proposed to quantitatively estimate contributions of different sources. It was estimated that outdoor CO(2) contributed largely to the indoor CO(2), while main indoor sources were human metabolism and cooking. Outdoor infiltration and cooking contributed almost equally to the indoor CO. The contribution of outdoor infiltration to methane was much higher than that to formaldehyde. Cooking contributed to 24%, 19%, and 25% of indoor formaldehyde, methane, and VOCs, whereas the other unresolved indoor sources contributed 61%, 19%, and 35% of these pollutants, respectively. Vertical measurements showed that the uplifting of hot air masses led to relatively high concentrations of the pollutants in the upper layer of the kitchen and in the other rooms to a lesser extent"
Keywords:		"*Air Pollutants *Air Pollution, Indoor Carbon Dioxide Environmental Monitoring *Environmental Pollutants Environmental Pollution Formaldehyde Gases Humans Sensor Source contribution Tempo-spatial distribution Vertical variation;"
Notes:		"MedlineShen, Guofeng Ainiwaer, Subinuer Zhu, Yaqi Zheng, Shuxiu Hou, Weiying Shen, Huizhong Chen, Yilin Wang, Xilong Cheng, Hefa Tao, Shu eng England 2020/12/02 Environ Pollut. 2020 Dec; 267:115493. doi: 10.1016/j.envpol.2020.115493. Epub 2020 Aug 27"