Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University, Gyeonggi-do, Republic of Korea.
J Air Waste Manag Assoc. 2012 May;62(5):517-26. doi: 10.1080/10962247.2012.660558.
Subway systems are considered as main public transportation facility in developed countries. Time spent by people in indoors, such as underground spaces, subway stations, and indoor buildings, has gradually increased in the recent past. Especially, operators or old persons who stay in indoor environments more than 15 hr per day usually influenced a greater extent by indoor air pollutants. Hence, regulations on indoor air pollutants are needed to ensure good health of people. Therefore, in this study, a new cumulative calculation method for the estimation of total amounts of indoor air pollutants emitted inside the subway station is proposed by taking cumulative amounts of indoor air pollutants based on integration concept. Minimum concentration of individual air pollutants which naturally exist in indoor space is referred as base concentration of air pollutants and can be found from the data collected. After subtracting the value of base concentration from data point of each data set of indoor air pollutant, the primary quantity of emitted air pollutant is calculated. After integration is carried out with these values, adding the base concentration to the integration quantity gives the total amount of indoor air pollutant emitted. Moreover the values of new index for cumulative indoor air quality obtained for 1 day are calculated using the values of cumulative air quality index (CAI). Cumulative comprehensive indoor air quality index (CCIAI) is also proposed to compare the values of cumulative concentrations of indoor air pollutants. From the results, it is clear that the cumulative assessment approach of indoor air quality (IAQ) is useful for monitoring the values of total amounts of indoor air pollutants emitted, in case of exposure to indoor air pollutants for a long time. Also, the values of CCIAI are influenced more by the values of concentration of NO2, which is released due to the use of air conditioners and combustion of the fuel. The results obtained in this study confirm that the proposed method can be applied to monitor total amounts of indoor air pollutants emitted, inside apartments and hospitals as well.
Nowadays, subway systems are considered as main public transportation facility in developed countries. Time spent by people in indoors, such as underground spaces, subway stations, and indoor buildings, has gradually increased in the recent past. Especially, operators or old persons who stay in the indoor environments more than 15 hr per day usually influenced a greater extent by indoor air pollutants. Hence, regulations on indoor air pollutants are needed to ensure good health of people. Therefore, this paper presents a new methodology for monitoring and assessing total amounts of indoor air pollutants emitted inside underground spaces and subway stations. A new methodology for the calculation of cumulative amounts of indoor air pollutants based on integration concept is proposed. The results suggest that the cumulative assessment approach of IAQ is useful for monitoring the values of total amounts of indoor air pollutants, if indoor air pollutants accumulated for a long time, especially NO2 pollutants. The results obtained here confirm that the proposed method can be applied to monitor total amounts of indoor air pollutants emitted, inside apartments and hospitals as well.
本研究提出了一种新的方法，用于估算地铁站内室内空气污染物的排放总量。该方法基于积分概念，通过对室内空气污染物的累积量进行计算，得出地铁站内室内空气污染物的排放总量。该方法将室内空间中自然存在的各单项空气污染物的最低浓度定义为空气污染物的本底浓度，并从已收集的数据中获取。从各数据集的室内空气污染物数据点中减去本底浓度的值，即可计算出一次排放的空气污染物的初始量。将这些值进行积分，再将积分值加上本底浓度，即可得到排放的室内空气污染物的总量。此外，还使用累积空气质量指数（CAI）计算了 1 天内新的累积室内空气质量指数（CIAI）的值。为了比较室内空气污染物的累积浓度，还提出了累积综合室内空气质量指数（CCIAI）。结果表明，室内空气质量（IAQ）的累积评估方法有助于监测长期暴露于室内空气污染物时排放的室内空气污染物总量。此外，NO2 浓度的变化对 CCIAI 的影响更大，因为 NO2 是由空调使用和燃料燃烧释放的。本研究的结果证实，该方法可应用于监测公寓和医院内排放的室内空气污染物总量。
现如今，地铁系统被视为发达国家主要的公共交通设施。在过去的一段时间里，人们在室内的时间逐渐增加，如地下空间、地铁站和室内建筑。特别是每天在室内环境中停留超过 15 小时的操作人员或老年人，更容易受到室内空气污染物的影响。因此，需要对室内空气污染物进行监管，以确保人们的身体健康。因此，本文提出了一种新的方法，用于监测和评估地铁站内地下空间和室内空气中的室内空气污染物排放总量。提出了一种基于积分概念的室内空气污染物累积量计算方法。结果表明，如果室内空气污染物长期积累，特别是 NO2 污染物，IAQ 的累积评估方法有助于监测室内空气污染物的总量。本研究的结果证实，该方法可应用于监测公寓和医院内排放的室内空气污染物总量。
