Measurement report: Impact of emission control measures on environmental persistent free radicals and reactive oxygen species – a short-term case study in Beijing DOI Creative Commons
Yuanyuan Qin, Xinghua Zhang, Wei Huang

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(15), P. 8737 - 8750

Published: Aug. 8, 2024

Abstract. A series of emission control measures implemented by the Chinese government have effectively reduced air pollution multiple pollutants in many regions country recent decades. However, impacts these on environmental persistent free radicals (EPFRs) and reactive oxygen species (ROSs), two groups chemical that are known to be linked with adverse human health effects, still not clear. In this study, we investigated levels, patterns, sources EPFRs gas- particle-phase ROSs (referred as G-ROSs P-ROSs, respectively) Beijing during 2015 China Victory Day Parade period when short-term quality were imposed. non-control (NCP) tended centered a mixture carbon oxygen, while those (CP) mainly oxygen-centered radicals. The contribution atmospheric oxidizing capacity increased, P-ROSs decreased CP compared NCP. strict ambient EPFRs, G-ROSs, 18.3 %, 24.1 46.9 respectively; amounts smaller than decreases most other measured pollutants. Although particle-matter-based performed well achieving “Parade Blue”, it is difficult simultaneously reduce negative atmosphere health. Blue days largely attributed dramatic reduction secondary aerosols, which also responsible for EPFR ROS reductions. Compared cases NCP, source-sector-based concentrations PM2.5, 78.7 %–80.8 % coming from 59.3 %–65.0 dust sources, 65.3 %–67.0 industrial emissions, 32.6 %–43.8 vehicle increased 1.61 %–71.5 %. Vehicle emissions may play complex roles public This insight will prompt policymakers reevaluate current management strategies more address challenges posed such ROSs.

Language: Английский

Measurement report: Impact of emission control measures on environmental persistent free radicals and reactive oxygen species – a short-term case study in Beijing DOI Creative Commons
Yuanyuan Qin, Xinghua Zhang, Wei Huang

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(15), P. 8737 - 8750

Published: Aug. 8, 2024

Abstract. A series of emission control measures implemented by the Chinese government have effectively reduced air pollution multiple pollutants in many regions country recent decades. However, impacts these on environmental persistent free radicals (EPFRs) and reactive oxygen species (ROSs), two groups chemical that are known to be linked with adverse human health effects, still not clear. In this study, we investigated levels, patterns, sources EPFRs gas- particle-phase ROSs (referred as G-ROSs P-ROSs, respectively) Beijing during 2015 China Victory Day Parade period when short-term quality were imposed. non-control (NCP) tended centered a mixture carbon oxygen, while those (CP) mainly oxygen-centered radicals. The contribution atmospheric oxidizing capacity increased, P-ROSs decreased CP compared NCP. strict ambient EPFRs, G-ROSs, 18.3 %, 24.1 46.9 respectively; amounts smaller than decreases most other measured pollutants. Although particle-matter-based performed well achieving “Parade Blue”, it is difficult simultaneously reduce negative atmosphere health. Blue days largely attributed dramatic reduction secondary aerosols, which also responsible for EPFR ROS reductions. Compared cases NCP, source-sector-based concentrations PM2.5, 78.7 %–80.8 % coming from 59.3 %–65.0 dust sources, 65.3 %–67.0 industrial emissions, 32.6 %–43.8 vehicle increased 1.61 %–71.5 %. Vehicle emissions may play complex roles public This insight will prompt policymakers reevaluate current management strategies more address challenges posed such ROSs.

Language: Английский

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