DOI: 10.1016/j.atmosenv.2014.07.053
Scopus记录号: 2-s2.0-84924165042
论文题名: Contribution of indoor-generated particles to residential exposure
作者: Isaxon C ; , Gudmundsson A ; , Nordin E ; Z ; , Lönnblad L ; , Dahl A ; , Wieslander G ; , Bohgard M ; , Wierzbicka A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 106 起始页码: 458
结束页码: 466
语种: 英语
英文关键词: Exposure
; Indoor measurements
; Indoor sources
; Soot
; Source strength
; Ultrafine particles
Scopus关键词: Correlation methods
; Housing
; Soot
; Exposure
; Indoor measurement
; Indoor sources
; Source strength
; Ultrafine particle
; Dust
; airborne survey
; ambient air
; atmospheric pollution
; dust
; health risk
; indoor air
; particle size
; pollution exposure
; public health
; residential location
; soot
; urban atmosphere
; airborne particle
; ambient air
; Article
; combustion
; controlled study
; environmental exposure
; household
; human activities
; noise reduction
; particle size
; priority journal
; refraction index
; residential exposure
; smoking
; soot
; Sweden
; urban area
; Lund
; Skane
; Sweden
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The majority of airborne particles in residences, when expressed as number concentrations, are generated by the residents themselves, through combustion/thermal related activities. These particles have a considerably smaller diameter than 2.5μm and, due to the combination of their small size, chemical composition (e.g. soot) and intermittently very high concentrations, should be regarded as having potential to cause adverse health effects.In this study, time resolved airborne particle measurements were conducted for seven consecutive days in 22 randomly selected homes in the urban area of Lund in southern Sweden. The main purpose of the study was to analyze the influence of human activities on the concentration of particles in indoor air. Focus was on number concentrations of particles with diameters <300nm generated by indoor activities, and how these contribute to the integrated daily residential exposure. Correlations between these particles and soot mass concentration in total dust were also investigated.It was found that candle burning and activities related to cooking (using a frying pan, oven, toaster, and their combinations) were the major particle sources.The frequency of occurrence of a given concentration indoors and outdoors was compared for ultrafine particles. Indoor data was sorted into non-occupancy and occupancy time, and the occupancy time was further divided into non-activity and activity influenced time. It was found that high levels (above 104cm-3) indoors mainly occur during active periods of occupancy, while the concentration during non-activity influenced time differs very little from non-occupancy time.Total integrated daily residential exposure of ultrafine particles was calculated for 22 homes, the contribution from known activities was 66%, from unknown activities 20%, and from background/non-activity 14%.The collected data also allowed for estimates of particle source strengths for specific activities, and for some activities it was possible to estimate correlations between the number concentration of ultrafine particles and the mass concentration of soot in total dust in 10 homes. Particle source strengths (for 7 specific activities) ranged from 1.6·1012 to 4.5·1012min-1.The correlation between ultrafine particles and mass concentration of soot in total dust varied between 0.37 and 0.85, with an average of 0.56 (Pearson correlation coefficient).This study clearly shows that due to the importance of indoor sources, residential exposure to ultrafine particles cannot be characterized by ambient measurements alone. © 2014 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81853
Appears in Collections: 气候变化事实与影响
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作者单位: Ergonomics and Aerosol Technology, Lund University, Lund, Sweden; Astronomy and Theoretical Physics, Lund University, Sweden; Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
Recommended Citation:
Isaxon C,, Gudmundsson A,, Nordin E,et al. Contribution of indoor-generated particles to residential exposure[J]. Atmospheric Environment,2015-01-01,106