Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
Int J Environ Res Public Health. 2018 Mar 27;15(4):611. doi: 10.3390/ijerph15040611.
Many people spend lengthy periods each day in enclosed vehicles in Hong Kong. However, comparably limited data is available about in-cabin air quality in air-conditioned private vehicles, and the car usage that may affect the air quality. Fifty-one vehicles were tested for particulate matter (PM and PM), total volatile organic compounds (TVOCs), carbon monoxide (CO), carbon dioxide (CO₂), airborne bacteria, and fungi levels during their routine travel journey. Ten of these vehicles were further examined for PM, PM, TVOCs, CO, and CO₂ during engine idling. In general, during driving PM levels in-cabin reduced overtime, but not PM. For TVOCs, 24% vehicles exceeded the recommended Indoor Air Quality (IAQ) level in offices and public places set by the Hong Kong Environmental Protection Department. The total volatile organic compounds (TVOC) concentration positively correlated with the age of the vehicle. Carbon monoxide (CO) levels in all of the vehicles were lower than the IAQ recommendation, while 96% vehicles exceeded the recommended CO₂ level of 1000 ppmv; 16% vehicles >5000 ppmv. Microbial counts were relatively low. TVOCs levels at idle engine were higher than that during driving. Although the time we spend in vehicles is short, the potential exposure to high levels of pollutants should not be overlooked.
许多人在香港每天都会在封闭的车辆中度过很长时间。然而，关于空调私家车的舱内空气质量以及可能影响空气质量的汽车使用情况，相关数据相对有限。在日常行驶过程中，对 51 辆汽车进行了颗粒物（PM 和 PM）、总挥发性有机化合物（TVOCs）、一氧化碳（CO）、二氧化碳（CO₂）、空气细菌和真菌水平的测试。其中 10 辆车在发动机空转时进一步检查了 PM、PM、TVOCs、CO 和 CO₂。一般来说，在驾驶过程中，车内的 PM 水平会随时间的推移而降低，但 PM 不会。对于 TVOCs，24%的车辆超过了香港环境保护署（Hong Kong Environmental Protection Department）设定的办公室和公共场所室内空气质量（IAQ）标准。总挥发性有机化合物（TVOC）浓度与车辆的年龄呈正相关。所有车辆的一氧化碳（CO）水平均低于 IAQ 建议值，而 96%的车辆超过了 1000ppmv 的 CO₂推荐水平；16%的车辆超过 5000ppmv。微生物计数相对较低。怠速发动机的 TVOCs 水平高于行驶时的水平。尽管我们在车内的时间很短，但不应忽视接触高水平污染物的潜在风险。
