Chemically Resolved Respiratory Deposition of Ultrafine Particles Characterized by Number Concentration in the Urban Atmosphere

Zhai, Jinghao1,2; Shao, Shi1,2; Yang, Xin1,2; Zeng, Yaling1,2; Fu, Tzung-May1,2; Zhu, Lei1,2; Shen, Huizhong1,2; Ye, Jianhuai1,2; Wang, Chen1,2; Tao, Shu1,2

2024-09-01

10.1021/acs.est.4c03279

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

Ultrafine particles (UFPs) dominate the atmospheric particles in number concentration, impacting human health and climate change. However, existing studies primarily rely on mass-based approaches, leading to a restricted understanding of the number-based and chemically resolved health effects of atmospheric UFPs. In this study, we utilized a high-mass-resolution single-particle aerosol mass spectrometer to investigate the online chemical composition and number size distribution of ultrafine, fine, and coarse particles during the summertime in urban Shenzhen, China. Human respiratory deposition dose assessments of particles with varying chemical compositions were further conducted by a respiratory deposition model. The results showed that during our observation, particles containing elemental carbon (EC) were the dominant components in UFPs (0.05-0.1 mu m). Compared to fine and coarse particles, UFPs can deposit more deeply into the respiratory tract with a daily dose of similar to 2.08 +/- 0.67 billion particles. Among the deposited UFPs, EC-cluster particles constituted similar to 85.7% in number fraction, accounting for a daily number dose of similar to 1.78 billion particles, which poses a greater impact on human health. Simultaneously, we found discrepancies in the chemically resolved particle depositions among number-, surface area-, and mass-based approaches, emphasizing the importance of an appropriate metric for particle health-risk evaluation.

ultrafine particles respiratory deposition single-particle mass spectrometry chemical composition health effect

SCI

英语

第一 ; 通讯

Guangdong Basic and Applied Basic Research Foundation[2023A1515011037] ; National Natural Science Foundation of China["42305108","41827804"] ; Shenzhen Science and Technology Program["RCBS20221008093123058","KQTD20210811090048025","KCXFZ20230731093601003"] ; Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks[ZDSYS20220606100604008] ; Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area[2021B1212050024] ; Guangdong University Research Project Science Team[2021KCXTD004] ; High-Level Special Funds[G030290001]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:001305322500001

AMER CHEMICAL SOC

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen Key Lab Precis Measurement & Early Warnin, Shenzhen 518055, Peoples R China
2.Guangdong Prov Observat & Res Stn Coastal Atmosphe, Shenzhen 518055, Peoples R China

Zhai, Jinghao,Shao, Shi,Yang, Xin,et al. Chemically Resolved Respiratory Deposition of Ultrafine Particles Characterized by Number Concentration in the Urban Atmosphere[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2024.

Zhai, Jinghao.,Shao, Shi.,Yang, Xin.,Zeng, Yaling.,Fu, Tzung-May.,...&Tao, Shu.(2024).Chemically Resolved Respiratory Deposition of Ultrafine Particles Characterized by Number Concentration in the Urban Atmosphere.ENVIRONMENTAL SCIENCE & TECHNOLOGY.

Zhai, Jinghao,et al."Chemically Resolved Respiratory Deposition of Ultrafine Particles Characterized by Number Concentration in the Urban Atmosphere".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2024).