短距离下不同出行方式的空气污染物暴露水平

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Abstract To investigate the differences in air pollutant exposure levels of commuters under different travel modes and to provide a scientific basis for health protection from air pollutant exposure during short-distance travel, portable individual air exposure monitors were used to monitor the exposure of five air pollutants (NO₂, CO, O₃, PM_2.5 and PM₁₀) at a fixed route in Beijing on four travel modes: bus, subway, bicycle and car. The key findings are: (1) At the same ambient air pollution level, the exposure levels of air pollutants among different travel modes were significantly different. Travel by subway had the highest exposure level of NO₂ (46.46μg/m³). Exposure level of CO (1334.99μg/m³) when travel by bus was slightly higher than those using the other three travel modes. Cycling has the highest exposure level of O₃(28.83μg/m³), PM_2.5(21.98μg/m³) and PM₁₀ (25.57μg/m³). (2) Considering travel time and inhalation rate, travel by bicycle has the highest exposure doses of NO₂, CO, O₃, PM_2.5 and PM₁₀, followed by bus, subway and car. (3) Ambient pollutants’ concentrations strongly affect individual exposure levels for different travel modes. When the ambient NO₂ and CO concentrations are low (NO₂ £ 18μg/m³, CO £ 300μg/m³) and O₃ concentrations are high (O₃ > 65μg/m³), the individual exposure concentrations of the three pollutants are lower for subway travel than for other modes. In contrast, when the ambient NO₂ and CO concentrations are high (NO₂ > 18μg/m³, CO > 500μg/m³) and O₃concentrations are low, individual exposure concentrations of the three pollutants are lower for car travel. When ambient concentrations of particulate matter are low (PM_2.5 £ 20 μg/m³, PM₁₀ £ 30 μg/m³), exposure levels for subway and bus are relatively lower. When choosing their travel modes, commuters should consider both the ambient air pollution levels and their travel needs. We suggest choosing public transportation mode instead of private cars for short-distance travel need when ambient air quality is great for health benefit.

Key words： personal air pollutants exposure travel modes traffic micro-environment Beijing

Received: 21 February 2023

PACS:

X503.1

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	Articles by authors
	GENG Yi-shuo
	LI Sai
	WU Peng-peng
	QI Ling
	CAO Su-zhen
	DUAN Xiao-li

Cite this article:

GENG Yi-shuo,LI Sai,WU Peng-peng等. Air pollutant exposure levels of different travel modes at short distances[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4951-4960.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4951

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