Seasonal Variations in the Chemical Composition of Indoor and Outdoor PM10 in University Classrooms

Sustainability

Maria Agostina Frezzini¹  Lorenzo Massimi¹  Martina Ristorini¹  Armando Pelliccioni²  Tiziana Sargolini³  Maria Catrambone³  Marco Giusto³  Luca Tofful³  Silvia Canepari³  Salvatore Pareti³  Cinzia Perrino³  Elena Rantica³ 

[1] Environmental Biology Department, Sapienza University, 00185 Rome, Italy;INAIL, Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Monte Porzio Catone, 00078 Rome, Italy;National Research Council, Institute of Atmospheric Pollution Research, Monterotondo St., 00015 Rome, Italy;

关键词: air quality;    PM sources;    infiltration;    air-conditioning;    mass closure;   

DOI  :  10.3390/su13042263

来源: DOAJ

【 摘 要 】

In the VIEPI project (Integrated evaluation of the exposure to indoor particulate matter) framework, we carried out a 1-year study of the concentration and chemical composition of particulate matter (PM) in a 5 story building in the Sapienza University of Rome (Italy). Each sampling had a duration of 1 month and was carried out indoors and outdoors in six classrooms. The chemical analyses were grouped to obtain information about the main PM sources. Micro-elements in their soluble and insoluble fractions were used to trace additional sources. Indoor PM composition was dominated by soil components and, to a lesser extent, by the organics, which substantially increased when people crowded the sites. The penetration of PM components was regulated by their chemical nature and by the dimensions of the particles in which they were contained. For the first time in crowded indoor environments, three different chemical assays aimed to determine PM redox properties complemented chemical composition measurements. These preliminary tests showed that substantially different redox properties characterised atmospheric particles in indoor and outdoor sites. The innovative characteristics of this study (time duration, number of considered environments) were essential to obtain relevant information about PM composition and sources in indoor academic environments and the occupants’ role.

【 授权许可】

Unknown