TY - JOUR
T1 - Particle size distribution of polychlorinated dibenzo-p-dioxins and dibenzofurans in the ambient air of an electric-arc furnace-dust treatment plant
AU - Yu, Kuei Min
AU - Wu, Yee Lin
AU - Fang, Kenneth
AU - Lin, Mark
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Atmospheric particle size distributions of 2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) between 0.166 and 100μm in aerodynamic diameter (Dp) were measured at two sampling sites. The two sites (OR and SG) were approximately 100m from the fugitive emission areas inside an electric-arc furnace-dust treatment plant (hereinafter to referred as the TSU plant) and were 6.5 and 1.5m above ground level, respectively. Size-segregated atmospheric particles were collected through means of a micro-orifice uniform deposit impactor (MOUDI) and a Noll rotary impactor (NRI) when the sampling sites were downwind (April, 2007) and upwind (May, 2007) from the fugitive emission area of the TSU plant. Experimental results indicate that PCDD/Fs were associated with the full size range of atmospheric particles. For fugitive sources in TSU plant, although less than 49% of total PCDD/Fs and toxic equivalents (TEQs) were found to be associated with fine particles, more than 54% of total PCDD/Fs and TEQs were correlated with fine particles from outside-plant emission sources. Particle size distributions of total PCDD/Fs and TEQs were shifted to larger particles with a decreasing altitude. Notably, PCDFs distributed extensively among aerosol size fractions based on their chlorination level during all sampling periods. Overall mass median diameter (MMDo) of total-PCDD/F-TEQs for fugitive areas in the TSU plant were higher than those from outside-plant emission sources.
AB - Atmospheric particle size distributions of 2,3,7,8-substituted polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) between 0.166 and 100μm in aerodynamic diameter (Dp) were measured at two sampling sites. The two sites (OR and SG) were approximately 100m from the fugitive emission areas inside an electric-arc furnace-dust treatment plant (hereinafter to referred as the TSU plant) and were 6.5 and 1.5m above ground level, respectively. Size-segregated atmospheric particles were collected through means of a micro-orifice uniform deposit impactor (MOUDI) and a Noll rotary impactor (NRI) when the sampling sites were downwind (April, 2007) and upwind (May, 2007) from the fugitive emission area of the TSU plant. Experimental results indicate that PCDD/Fs were associated with the full size range of atmospheric particles. For fugitive sources in TSU plant, although less than 49% of total PCDD/Fs and toxic equivalents (TEQs) were found to be associated with fine particles, more than 54% of total PCDD/Fs and TEQs were correlated with fine particles from outside-plant emission sources. Particle size distributions of total PCDD/Fs and TEQs were shifted to larger particles with a decreasing altitude. Notably, PCDFs distributed extensively among aerosol size fractions based on their chlorination level during all sampling periods. Overall mass median diameter (MMDo) of total-PCDD/F-TEQs for fugitive areas in the TSU plant were higher than those from outside-plant emission sources.
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U2 - 10.1089/ees.2009.0151
DO - 10.1089/ees.2009.0151
M3 - Article
AN - SCOPUS:72849131133
SN - 1092-8758
VL - 26
SP - 1713
EP - 1723
JO - Environmental Engineering Science
JF - Environmental Engineering Science
IS - 12
ER -