Commuter exposure to particulate matter in public transportation modes in Hong Kong
Commuter exposure to particulate matter in public transportation modes in Hong Kong
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DOI：
10.1016/s1352-2310(02)00318-7
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发表时间：
2002-07-01
影响因子：
5
通讯作者：
Chan, CY
中科院分区：
文献类型：
--
作者：
Chan, LY;Lau, WL;Chan, CY
本研究旨在探讨通勤者于搭乘公共交通工具时，对可吸入悬浮颗粒物之暴露量。这项统计调查于一九九九年十月至二零零零年一月在香港进行。研究共选取了八种公共交通工具，包括巴士、电车、公共小巴、的士、渡轮、九广铁路、地下铁路及轻便铁路。它们被分为四类：（T1）铁路运输;（T2）非空调公路运输;（T3）空调公路运输和（T4）海上运输。研究了PM10和PM2.5水平。结果表明，颗粒物水平受运输方式以及运输通风系统的影响很大。T2（147 mug m（-3））的总体平均PM10浓度水平最高，其次是T4（81 mug m（-3））和T3（65 mug m（-3））。T1（50 μ g m（-3））的PM10水平最低。值得注意的是，电车中的通勤者暴露（175 mug m（-3））是所有监测的通勤模式中最高的。建议采用铁路和空调车等通勤方式替代非空调车。交通工具中PM2.5与PM10的比例为63%至78%。装有空调系统的车辆的PM2.5/PM10比例较高。对于双层车辆，较高的PM10水平导致下层。空调巴士、非空调巴士及非空调电车上下层空气中PM10的平均比率分别为0.836、0.751及0.738。还介绍了不同输运方式下的典型浓度分布。(C)2002爱思唯尔科技有限公司版权所有。
This study examined commuter's exposure to respirable suspended particulate matters while commuting in public transportation modes. The survey was conducted between October 1999 and January 2000 in Hong Kong. A total of eight public transportation modes, that are bus, tram, public light bus, taxi, ferry, Kowloon-Canton Railway, Mass Transit Railway and Light Rail Transit, were selected in the study. They were grouped into four categories: (T1) railway transport; (T2) non-air-conditioned roadway transport; (T3) air-conditioned roadway transport and (T4) marine transport. Both PM10 and PM2.5 levels were investigated. The results indicate that the particulate level is greatly affected by the mode of transport as well as the ventilation system of the transport. The overall average PM10 concentration level in T2 (147 mug m(-3)) is the highest and is followed by T4 (81 mug m(-3)) and T3 (65 mug m(-3)). The PM10 level in T1 (50 mug m(-3)) is the lowest. Notably, the commuter exposure in tram (175 mug m(-3)) is the highest among all the monitored commuting modes. Commuting modes such as railway and air-conditioned vehicle are recommended as a substitute for non-air-conditioned vehicle. The PM2.5 to PM10 ratio in transports ranged from 63% to 78%. Higher PM2.5 to PM10 ratio is found in vehicles with air-conditioning system. For the double deck vehicle, higher PM10 level has resulted in the lower deck. The average upper-deck to lower-deck PM10 ratio is 0.836, 0.751 and 0.738 in air-conditioned bus, non-air-conditioned bus and non-air-conditioned tram, respectively. Typical concentration profiles in different transports are also presented. (C) 2002 Elsevier Science Ltd. All rights reserved.