Sources of indoor air pollution in New York City residences of asthmatic children

作者：Habre Rima^*; Coull Brent; Moshier Erin; Godbold James; Grunin Avi; Nath Amit; Castro William; Schachter Neil; Rohr Annette; Kattan Meyer; Spengler John; Koutrakis Petros

来源：Journal of Exposure Science and Environmental Epidemiology, 2014, 24(3): 269-278.

DOI：10.1038/jes.2013.74

• air pollution
• particulate matter
• indoor sources
• sulfur tracer method
• enrichment factors
• carbon fractions

Individuals spend similar to 90% of their time indoors in proximity to sources of particulate and gaseous air pollutants. The sulfur tracer method was used to separate indoor concentrations of particulate matter (PM) PM2.5 mass, elements and thermally resolved carbon fractions by origin in New York City residences of asthmatic children. Enrichment factors relative to sulfur concentrations were used to rank species according to the importance of their indoor sources. Mixed effects models were used to identify building characteristics and resident activities that contributed to observed concentrations. Significant indoor sources were detected for OC1, Cl, K and most remaining OC fractions. We attributed 46% of indoor PM2.5 mass to indoor sources related to OC generation indoors. These sources include cooking (NO2, Si, Cl, K, OC4 and OP), cleaning (most OC fractions), candle/incense burning (black carbon, BC) and smoking (K, OC1, OC3 and EC1). Outdoor sources accounted for 28% of indoor PM2.5 mass, mainly photochemical reaction products, metals and combustion products (EC, EC2, Br, Mn, Pb, Ni, Ti, V and 5). Other indoor sources accounted for- 26% and included re-suspension of crustal elements (Al, Zn, Fe, Si and Ca). Indoor sources accounted for similar to 72% of PM2.5 mass and likely contributed to differences in the composition of indoor and outdoor PM2.5 exposures.

• 出版日期2014-6