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Validation of modeling approach to evaluate congener-specific concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans in air and soil near a solid waste incinerator.
Authors:Kikuo Yoshida   Shino Ikeda   Junko Nakanishi  Nobuyuki Tsuzuki
Affiliation:

a Safety Engineering Department, National Institute for Resources and Environment, AIST, MITI, 16-3 Onogawa, Tsukuba 305-8569, Japan

b Institute of Environmental Science and Technology, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan

c CREST, Japan Science and Technology Corporation, 4-1-8 Honcho, Kawaguchi 332-0012, Japan

d Fujitsu FIP Corporation, 2-45 Aomi, Koto-ku, Tokyo 135-8686, Japan

e Soil and Agricultural Chemicals Division, Japan Environment Agency, 1-2-2 Kasumigaseki, Chiyoda-ku, Tokyo 100-8975, Japan

Abstract:A concise modeling approach using long-term averaged meteorological data was developed to estimate site-specific concentrations of congeners of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) near a solid waste incinerator. This approach consists of calculation of atmospheric dispersion, dry and wet deposition of gaseous and particle-bound congeners, and non-steady-state concentrations in soil. The predictability of this approach was evaluated by comparison of calculated concentrations of congeners in soil with those measured at eight locations near a municipal solid waste incinerator (MSWI). The variation of these concentrations due to variability of meteorological parameters is small. A considerable number of mean values show good agreement with measured concentrations within a factor of three. The reasonable agreement between calculated and measured concentrations indicates that algorithms for the calculation of vapor-phase deposition and non-steady-state concentrations in soil must be included in the modeling approach for an accurate estimation of the concentrations of congeners of PCDD/Fs emitted from MSWIs to the atmosphere. For a detailed estimation of site-specific concentrations, it is important to specify the bulk density of soil in the evaluated area, together with meteorological parameters.
Keywords:Atmospheric dispersion   Deposition   Non-steady-state   Site-specific
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