Source Apportionment and Influencing Factor Analysis of Residential Indoor PM 2.5 in Beijing

Yibing Yang, Liu Liu, Chunyu Xu, Na Li, Zhe Liu, Qin Wang and Dongqun Xu
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Yibing Yang: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Liu Liu: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Chunyu Xu: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Na Li: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Zhe Liu: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Qin Wang: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
Dongqun Xu: National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China

IJERPH, 2018, vol. 15, issue 4, 1-19

Abstract: In order to identify the sources of indoor PM 2.5 and to check which factors influence the concentration of indoor PM 2.5 and chemical elements, indoor concentrations of PM 2.5 and its related elements in residential houses in Beijing were explored. Indoor and outdoor PM 2.5 samples that were monitored continuously for one week were collected. Indoor and outdoor concentrations of PM 2.5 and 15 elements (Al, As, Ca, Cd, Cu, Fe, K, Mg, Mn, Na, Pb, Se, Tl, V, Zn) were calculated and compared. The median indoor concentration of PM 2.5 was 57.64 μg/m 3 . For elements in indoor PM 2.5 , Cd and As may be sensitive to indoor smoking, Zn, Ca and Al may be related to indoor sources other than smoking, Pb, V and Se may mainly come from outdoor. Five factors were extracted for indoor PM 2.5 by factor analysis, explained 76.8% of total variance, outdoor sources contributed more than indoor sources. Multiple linear regression analysis for indoor PM 2.5 , Cd and Pb was performed. Indoor PM 2.5 was influenced by factors including outdoor PM 2.5 , smoking during sampling, outdoor temperature and time of air conditioner use. Indoor Cd was affected by factors including smoking during sampling, outdoor Cd and building age. Indoor Pb concentration was associated with factors including outdoor Pb and time of window open per day, building age and RH. In conclusion, indoor PM 2.5 mainly comes from outdoor sources, and the contributions of indoor sources also cannot be ignored. Factors associated indoor and outdoor air exchange can influence the concentrations of indoor PM 2.5 and its constituents.

Keywords: indoor PM 2.5; residential houses; chemical elements; source apportionment; influencing factor analysis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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