Longitudinal Study of Indoor Particulate Matter and its Relationship to Outdoor Concentrations in New Delhi, India
Longitudinal Study of Indoor Particulate Matter and its Relationship to Outdoor Concentrations in New Delhi, India
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DOI：
10.1177/1420326x08097294
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发表时间：
2008-12
影响因子：
3.6
通讯作者：
S. Saksena;R. Uma
中科院分区：
文献类型：
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作者：
S. Saksena;R. Uma
目前用于估计室外城市空气污染对健康的影响和负担的模型假定，感兴趣的污染物的室外和室内浓度之间每天都有很强的相关性。在发展中国家，基于日常纵向设计的室内-室外关系研究很少。我们的研究是一个比较长的纵向研究，进行了三年半。在办公楼和建筑物外测量了室内总悬浮颗粒物（TSP）和可吸入悬浮颗粒物（RSP）（d 50 = 10 μm）的水平。室内TSP和RSP浓度的平均值，虽然远高于在发达国家的类似微环境中观察到的值，但低于室外浓度，但高于印度的环境标准。然而，虽然发达国家（和一些发展中国家）的研究观察到室内和室外浓度之间存在很强的纵向相关性，但我们的研究结果却相反。室外可吸入悬浮粒子浓度的变化只能解释室内浓度变化的25%。我们的研究结果有力地支持了这样一种信念，即室内-室外关系不能被概括，而是强烈依赖于诸如建筑类型、通风、气候等因素。
Current models used to estimate the health effects and burden of outdoor urban air pollution assume a strong day-to-day correlation between outdoor and indoor concentration of the pollutant(s) of interest. Studies of indoor—outdoor relationships, based on a day-to-day longitudinal design, in developing countries have been rare. Our study is a comparatively long longitudinal study conducted over three and a half years. Indoor levels of Total Suspended Particulates (TSP) and Respirable Suspended Particulates (RSP), d 50 = 10 μm, were measured in an office building and also just outside the building. The mean values of indoor TSP and RSP concentrations, though much higher than those observed in similar micro-environments in developed countries, were less than the outdoor concentrations but higher than the Indian ambient standards. However, while studies in developed countries (and in some developing countries) have observed strong longitudinal correlations between indoor and outdoor concentrations, the results of our study were contrary. The variation in outdoor concentration of RSP could explain only 25% of the variation in indoor concentration. Our results strongly support the belief that indoor— outdoor relationships cannot be generalized, but are strongly dependent on factors such as type of building, ventilation, climate among others.