Change of Composition, Source Contribution, and Oxidative Effects of Environmental PM2.5 in the Respiratory Tract

Liu Cong; Hu Hao; Zhou ShuonvChen XiaoleHu YongtaoHu Jianlin

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Change of Composition, Source Contribution, and Oxidative Effects of Environmental PM2.5 in the Respiratory Tract

机译：Change of Composition, Source Contribution, and Oxidative Effects of Environmental PM2.5 in the Respiratory Tract

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This study highlights the necessity ofphysiology-orientedsource apportionment and health evaluation of ambient PM2.5 pollution. Fine particulate matter is a leadingair pollutant, and its compositionprofile relates to sources and health effects. The human respiratorytract hosts a warmer and more humid microenvironment in contrast withperipheral environments. However, how the human respiratory tractimpacts the transformation of the composition of environmental PM2.5 once they are inhaled and consequently changes of sourcecontribution and health effects are unknown. Here, we show that therespiratory tract can make these properties of PM2.5 reachingthe lung different from environmental PM2.5. We found viaan in vitro model that the warm and humid conditions drive the desorptionof nitrate (about 60%) and ammonium (about 31%) out of PM2.5 during the inhalation process and consequently make source contributionprofiles for respiratory tract-deposited PM2.5 differentfrom that for environmental PM2.5 as suggested in 11 Chinesecities and 12 US cities. We also observed that oxidative potential,one of the main health risk causes of PM2.5, increasesby 41% after PM2.5 travels through the respiratory tractmodel. Our results reveal that PM2.5 inhaled in the lungdiffers from environmental PM2.5. This work provides astarting point for more health-oriented source apportionment, physiology-basedhealth evaluation, and cost-effective control of PM2.5 pollution.

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来源
《Environmental Science & Technology: ES&T》 |2023年第31期|11605-11611|共7页
作者
Liu Cong; Hu Hao; Zhou ShuonvChen XiaoleHu YongtaoHu Jianlin;
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作者单位

Southeast Univ;

Minist Educ;

Georgia Inst TechnolNanjing Univ Informat Sci & Technol;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
PM2 5; respiratory tract; sourcecontribution; health effect; DISSOLUTION KINETICS; PARTICLE DEPOSITION; AIR-POLLUTION; MORTALITY; METALS; IMPACT; SVOCS; WATER; MODEL; PH;

Change of Composition, Source Contribution, and Oxidative Effects of Environmental PM2.5 in the Respiratory Tract

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