Volume 18, Issue 3 (12-2025)
ijhe 2025, 18(3): 535-552 |
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Khodarahmi Z, Heidari M, Moussavi G, Shekoohiyan S. Number deposition rate of dust particles in residential buildings in Tehran. ijhe 2025; 18 (3) :535-552
URL: http://ijhe.tums.ac.ir/article-1-7061-en.html
URL: http://ijhe.tums.ac.ir/article-1-7061-en.html
1- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
2- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran ,Moheidari@modares.ac.ir
2- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran ,
Abstract: (493 Views)
Background and Objective: To date, the number of dust particles that may be deposited daily in residential buildings has not yet been considered, while this type of pollution may have adverse effects on human health and can also be used to describe indoor air quality. The aims of this study were to evaluate the number deposition rate of dust particles in residential buildings in Tehran and to analyze its variability under various conditions.
Materials and Methods: In this cross-sectional study, 42 fallout samples were collected from residential buildings in Tehran during two periods in the spring (warm) and autumn (cold) seasons. For sampling, Petri dishes were placed inside residential buildings (living room, bedroom, or kitchen) for 45 days. The particles deposited on the surfaces of Petri dishes were counted directly and without any interference using a stereomicroscope. The obtained data were analyzed using Excel, Origin, and SPSS software.
Results: Average deposition rate over total sampling period was 9.23×106 PN/m²/day. The average deposition rate in the warm season (1.10×107 PN/m²/day) was significantly higher than the cold season (7.46×106 PN/m²/day) (p <0.001).
Conclusion: This study showed that a substantial number of dust particles are deposited daily in residential buildings. The high number deposition rate, along with its variability under various conditions, indicates the necessity for increased attention to this metric of dust pollution in indoor environments.
Materials and Methods: In this cross-sectional study, 42 fallout samples were collected from residential buildings in Tehran during two periods in the spring (warm) and autumn (cold) seasons. For sampling, Petri dishes were placed inside residential buildings (living room, bedroom, or kitchen) for 45 days. The particles deposited on the surfaces of Petri dishes were counted directly and without any interference using a stereomicroscope. The obtained data were analyzed using Excel, Origin, and SPSS software.
Results: Average deposition rate over total sampling period was 9.23×106 PN/m²/day. The average deposition rate in the warm season (1.10×107 PN/m²/day) was significantly higher than the cold season (7.46×106 PN/m²/day) (p <0.001).
Conclusion: This study showed that a substantial number of dust particles are deposited daily in residential buildings. The high number deposition rate, along with its variability under various conditions, indicates the necessity for increased attention to this metric of dust pollution in indoor environments.
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