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Title: 2013 Southeast Asian smoke haze: Fractionation of particulate-bound elements and associated health risk
Authors: Betha, R.
Behera, S.N.
Balasubramanian, R. 
Issue Date: 15-Apr-2014
Citation: Betha, R., Behera, S.N., Balasubramanian, R. (2014-04-15). 2013 Southeast Asian smoke haze: Fractionation of particulate-bound elements and associated health risk. Environmental Science and Technology 48 (8) : 4327-4335. ScholarBank@NUS Repository.
Abstract: Recurring biomass burning-induced smoke haze is a serious regional air pollution problem in Southeast Asia (SEA). The June 2013 haze episode was one of the worst air pollution events in SEA. Size segregated particulate samples (2.5-1.0 μm; 1.0-0.5 μm; 0.5- 0.2 μm; and 60%) of the elements was present in oxidizable and residual fractions while the bioavailable (exchangeable) fraction accounted for up to 20% for most of the elements except K and Mn. Deposition of inhaled potentially toxic trace elements in various regions of the human respiratory system was estimated using a Multiple-Path Particle Dosimetry model. The particle depositions in the respiratory system tend to be more severe during hazy days than those during nonhazy days. A prolonged exposure to finer particles can thus cause adverse health outcomes during hazy days. Health risk estimates revealed that the excessive lifetime carcinogenic risk to individuals exposed to biomass burning-impacted aerosols (18 ± 1 × 10-6) increased significantly (P < 0.05) compared to those who exposed to urban air (12 ± 2 × 10 -6). © 2014 American Chemical Society.
Source Title: Environmental Science and Technology
ISSN: 15205851
DOI: 10.1021/es405533d
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