caa a22 4500 606200266 CHVBK 20210128100943.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s10653-014-9661-0 doi (NATIONALLICENCE)springer-10.1007/s10653-014-9661-0 Particle size distribution and air pollution patterns in three urban environments in Xi'an, China [Elektronische Daten] [Xinyi Niu, Benjamin Guinot, Junji Cao, Hongmei Xu, Jian Sun] Three urban environments, office, apartment and restaurant, were selected to investigate the indoor and outdoor air quality as an inter-comparison in which CO2, particulate matter (PM) concentration and particle size ranging were concerned. In this investigation, CO2 level in the apartment (623ppm) was the highest among the indoor environments and indoor levels were always higher than outdoor levels. The PM10 (333µg/m3), PM2.5 (213µg/m3), PM1 (148µg/m3) concentrations in the office were 10-50% higher than in the restaurant and apartment, and the three indoor PM10 levels all exceeded the China standard of 150µg/m3. Particles ranging from 0.3 to 0.4µm, 0.4 to 0.5µm and 0.5 to 0.65µm make largest contribution to particle mass in indoor air, and fine particles number concentrations were much higher than outdoor levels. Outdoor air pollution is mainly affected by heavy traffic, while indoor air pollution has various sources. Particularly, office environment was mainly affected by outdoor sources like soil dust and traffic emission; apartment particles were mainly caused by human activities; restaurant indoor air quality was affected by multiple sources among which cooking-generated fine particles and the human steam are main factors. Springer Science+Business Media Dordrecht, 2014 Indoor air quality nationallicence Carbon dioxide nationallicence Particle mass nationallicence Particle size distribution nationallicence Niu Xinyi School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China aut Guinot Benjamin Observatory Midi-Pyrenees, National Center for Scientific Research, Toulouse, France aut Cao Junji School of Key Lab of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, P.R China aut Xu Hongmei School of Key Lab of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, P.R China aut Sun Jian Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China aut Environmental Geochemistry and Health Springer Netherlands 37/5(2015-10-01), 801-812 0269-4042 37:5<801 2015 37 10653 https://doi.org/10.1007/s10653-014-9661-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10653-014-9661-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Niu Xinyi School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China aut NATIONALLICENCE 700 1- Guinot Benjamin Observatory Midi-Pyrenees, National Center for Scientific Research, Toulouse, France aut NATIONALLICENCE 700 1- Cao Junji School of Key Lab of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, P.R China aut NATIONALLICENCE 700 1- Xu Hongmei School of Key Lab of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, P.R China aut NATIONALLICENCE 700 1- Sun Jian Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China aut NATIONALLICENCE 773 0- Environmental Geochemistry and Health Springer Netherlands 37/5(2015-10-01), 801-812 0269-4042 37:5<801 2015 37 10653