DOI: 10.1016/j.atmosenv.2020.117624
论文题名: Source apportionment of water-soluble oxidative potential in ambient total suspended particulate from Bangkok: Biomass burning versus fossil fuel combustion
作者: Wang J. ; Jiang H. ; Jiang H. ; Mo Y. ; Geng X. ; Li J. ; Mao S. ; Bualert S. ; Ma S. ; Li J. ; Zhang G.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 235 语种: 英语
英文关键词: Biomass
; Chemical analysis
; Combustion
; Factorization
; Linear regression
; Organic carbon
; Particles (particulate matter)
; Redox reactions
; Transition metals
; Water pollution
; Water pollution control
; Ambient particulate Matter
; Chemical compositions
; Chemical species concentrations
; Fossil fuel combustion
; Multiple linear regression analysis
; Positive matrix factorization models
; Source apportionment
; Total suspended particulates
; Fossil fuels
; biomass burning
; chemical composition
; combustion
; fossil fuel
; health impact
; oxidation
; particulate matter
; pollution control
; regression analysis
; solubility
; source apportionment
; suspended load
; Bangkok
; Central Region [Thailand]
; Indochina
; Krung Thep Mahanakhon
; Thailand
学科: Indochinese peninsula
; Metals
; Oxidative potential
; Source apportionment
; TSP
中文摘要: Oxidative potential (OP) is a promising and integrative metric for assessing health effects associated with exposure to ambient particulate matter. Source apportionment of water-soluble OP in aerosols is the basis for formulating pollution control policies. In this study, we collected total suspended particulate (TSP) samples in Bangkok, on the Indochinese Peninsula, where pollution levels are high due to annual biomass burning. We analyzed the chemical composition of the samples and performed dithiothreitol (DTT) assays to measure their OP. We observed higher TSP mass and chemical species concentrations among samples collected in the dry seasons due to biomass burning and fossil fuel combustion. The seasonally averaged volume-normalized OP (OPv) was highest in the dry I season (January to March), which was consistent with higher TSP concentrations during this period. The mass-normalized OP (OPm) decreased as TSP concentration increased due to the unaccounted fractions dominating the increase in TSP and/or the inhibiting effects of redox-active metals. Transition metals (e.g., Cu, V, and Ni), hopanes/steranes, and carbonaceous species (organic carbon and elemental carbon) correlated well with OPm. Source apportionment using the Positive Matrix Factorization model (PMF) and multiple linear regression analysis revealed that, although biomass burning accounted for the highest contribution (mean: 26%) to TSP concentration, the dominant source of water-soluble OPv of TSP was fossil fuel combustion, which included land fossil fuel combustion (63%) and ship emissions (16%). This significant contribution of fossil fuel combustion was determined by the transition metals Cu and V which were the main drivers of DTT activity in TSP. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160711
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100039, China; Faculty of Environment, Kasetsart University, Bangkok, 10900, Thailand; South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, 510655, China
Recommended Citation:
Wang J.,Jiang H.,Jiang H.,et al. Source apportionment of water-soluble oxidative potential in ambient total suspended particulate from Bangkok: Biomass burning versus fossil fuel combustion[J]. Atmospheric Environment,2020-01-01,235