AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
The Formation of Indoor Secondary Pollutants and Their Potential Health Effects
YU HUANG, Junji Cao, Shun-Cheng Lee, Institute of Earth Environment, Chinese Academy of Sciences
Abstract Number: 151 Working Group: Indoor Aerosols
Abstract D-limonene is one of the dominant terpenoids in indoor environment, which can be emitted from cleaning products and air fresheners. D-limonene is prone to oxidation resulting in the formation of secondary pollutants including secondary organic aerosol (SOA), hydrogen peroxide and organic peroxide which can pose health risks on residents. In this study, we investigated the effect of ammonia (NH3) on the formation of indoor SOA, hydrogen peroxide and organic peroxide from ozone/d-limonene reactions.The effects of coexisted ammonia on secondary pollutants formation from the ozonolysis of d-limonene were investigated via a large environmental chamber method.The experimental results demonstrated that the presence of NH3 (maximum concentration is 240 ppb) could significantly enhance the yields of SOA from the ozonolysis of d-limonene, but it could reduce the production of hydrogen peroxide and organic peroxide. The maximum total particle number concentration generated from the oxidation reactions was up to 1.3×105 #cm-3 in the presence of NH3, while it was 5.7×104 #cm-3 which was 43% lower without NH3. The total peroxides concentration was approximately 0.7 ppb without NH3, while it was 0.5 ppb in the presence of NH3. The mechanism regarding to the NH3 effect on the generation of indoor secondary pollutants from ozone/d-limonene reactions was further discussed.