Lyu X J, Li Z H, Li X, Zeng W L, Yang P, Lin Q X, Zheng J Y, Du X L, Gu Y Z, Zhao Y Q, Xie R S, Liu T, Lin H L, Ma W J
Environmental Health Department, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China; School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou 510515, China.
Environmental Health Department, Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2017 Mar 10;38(3):309-313. doi: 10.3760/cma.j.issn.0254-6450.2017.03.007.
To find the differences in PM(2.5) exposure level in the context of four commuting modes (by walk, bicycle, bus and subway) in Guangzhou. The PM(2.5) exposure assessment was carried out from January to December 2015 in Guangzhou. PM(2.5) was measured by using SidePak individual dust meter (AM510, TSI Inc. USA) with time interval of 1 minute. Our measurement was taken on Monday, Wednesday, Friday and Sunday in the second week of each month and the samples were collected in the morning (07:00-09:00), afternoon (11:00-13:00) and evening (17:00-19:00). A total of 284 air samples during walking, 281 air samples during bicycle riding, 278 air samples in bus, and 280 air samples in subway were collected. The median PM(2.5) concentrations exposed during walking, during bicycle riding, in bus and in subway were 38.4, 38.6, 23.3 and 24.1 μg/m(3), respectively, which were positive correlated with exposure concentration in fixed surveillance sites. The exposure level was lowest in summer, and highest in winter. The median of one-way exposure level to PM(2.5) from high to low were as follows: 21.0 μg for bicycle riding, 20.1 μg for walking, 5.1 μg for taking bus and 2.6 μg for taking subway. The season and time specific one-way exposure levels to PM(2.5) of four commuting modes were consistent. The exposure level to PM(2.5) was obviously higher during walking and bicycle riding than that in bus and subway. The exposure level to PM(2.5) during walking was higher than that during bicycle riding, in bus and in subway.
为了找出广州市四种通勤方式（步行、骑自行车、乘坐公交车和地铁）下的PM2.5暴露水平差异。于2015年1月至12月在广州进行PM2.5暴露评估。使用SidePak个人粉尘仪（AM510，美国TSI公司）测量PM2.5，时间间隔为1分钟。我们在每个月第二周的周一、周三、周五和周日进行测量，样本采集时间为上午（07:00 - 09:00）、下午（11:00 - 13:00）和晚上（17:00 - 19:00）。共采集到步行时的空气样本284个、骑自行车时的空气样本281个、乘坐公交车时的空气样本278个以及乘坐地铁时的空气样本280个。步行、骑自行车、乘坐公交车和乘坐地铁期间暴露的PM2.5浓度中位数分别为38.4、38.6、23.3和24.1μg/m³，与固定监测点的暴露浓度呈正相关。暴露水平在夏季最低，冬季最高。PM2.5单程暴露水平中位数从高到低依次为：骑自行车21.0μg、步行20.1μg、乘坐公交车5.1μg、乘坐地铁2.6μg。四种通勤方式的季节和时间特定的PM2.5单程暴露水平是一致的。步行和骑自行车时的PM2.5暴露水平明显高于乘坐公交车和地铁时。步行时的PM2.5暴露水平高于骑自行车、乘坐公交车和乘坐地铁时。
