| Deposition potential of 0.003-10 mu m ambient particles in the humidified human respiratory tract: Contribution of new particle formation events in Beijing | |
Ma, Li; Zhang, Ying ; Lin, Zhuohui; Zhou, Ying; Yan, Chao; Zhang, Yusheng; Zhou, Wenshuo; Ma, Wei; Hua, Chenjie; Li, Xiaoxiao; Deng, Chenjuan; Qi, Yu; Dada, Lubna; Li, Hongyan; Bianchi, Federico; Petaja, Tuukka; Kangasluoma, Juha; Jiang, Jingkun; Liu, Sijin; Hussein, Tareq; Kulmala, Markku; Liu, Yongchun
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| 2022-09-15 | |
| Source Publication | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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| ISSN | 0147-6513 |
| Volume | 243Issue:0Pages:114023 |
| Abstract | Ultrafine particles (UFPs) usually explosive growth during new particle formation (NPF) events. However, the risk of exposure to UFPs on NPF days has been ignored due to the prevalence of mass-based air quality standards. In this study, the daily deposited doses, i.e., the daily deposited particle number dose (D-PNd), mass dose (D-PMd), and surface area dose (D-PSd), of ambient particles in the human respiratory tract in Beijing were evaluated based on the particle number size distribution (3 nm-10 mu m) from June 2018 to May 2019 utilizing a Multiple-Path Particle Dosimetry Model (MPPD) after the hygroscopic growth of particles in the respiratory tract had been accounted for. Our observations showed a high frequency (72.6%) of NPF on excellent air quality days, with daily mean PM2.5 concentrations less than 35 mu g m(-3). The daily D-PNd on excellent air quality days was com-parable with that on polluted days, although the D-PMd on excellent air quality days was as low as 15.6% of that on polluted days. The D-PNd on NPF days was similar to 1.3 times that on non-NPF days. The D-PNd in respiratory tract regions decreased in the order: tracheobronchial (TB) > pulmonary (PUL) > extrathoracic (ET) on NPF days, while it was PUL > TB > ET on non-NPF days. The number of deposited nucleation mode particles, which were deposited mainly in the TB region (45%), was 2 times higher on NPF days than that on non-NPF days. Our results demonstrated that the deposition potential due to UFPs in terms of particle number concentrations is high in Beijing regardless of the aerosol mass concentration. More toxicological studies related to UFPs on NPF days, especially those targeting tracheobronchial and pulmonary impairment, are required in the future. |
| Department | 环境化学与生态毒理学国家重点实验室 ; 环境化学与生态毒理学国家重点实验室 |
| Keyword | NUMBER SIZE DISTRIBUTION ULTRAFINE PARTICLES HYGROSCOPIC GROWTH AIR-POLLUTION WATER-UPTAKE AEROSOL DISTRIBUTIONS MASS DENSITY MODEL |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47503 |
| Collection | 环境化学与生态毒理学国家重点实验室 |
| Corresponding Author | Liu, Yongchun |
| Affiliation | 1.Beijing Univ Chem Technol, Adv Innovat Ctr Soft Matter Sci & Engn, Aerosol & Haze Lab, Beijing 100029, Peoples R China 2.Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, Helsinki, Finland 3.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 5.Taiyuan Univ Sci & Technol, Sch Environm & Safety, Taiyuan 030024, Shanxi, Peoples R China |
| Recommended Citation GB/T 7714 | Ma, Li,Zhang, Ying,Lin, Zhuohui,et al. Deposition potential of 0.003-10 mu m ambient particles in the humidified human respiratory tract: Contribution of new particle formation events in Beijing[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2022,243(0):114023. |
| APA | Ma, Li.,Zhang, Ying.,Lin, Zhuohui.,Zhou, Ying.,Yan, Chao.,...&Liu, Yongchun.(2022).Deposition potential of 0.003-10 mu m ambient particles in the humidified human respiratory tract: Contribution of new particle formation events in Beijing.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,243(0),114023. |
| MLA | Ma, Li,et al."Deposition potential of 0.003-10 mu m ambient particles in the humidified human respiratory tract: Contribution of new particle formation events in Beijing".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 243.0(2022):114023. |
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