Investigation of the Volatile Chlorinated Hydrocarbon Concentrations around Emission Sources.
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概要
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Concentrations of volatile chlorinated hydrocarbons (VCHs) were measured in air from work-environment at two dry-cleaning factories and one metal-washing factory in Sendai city by the passive and active sampling methods. The VCHs investigated were 1, 1, 1-Trichloroethane (MCF), Carbon tetrachloride (CTC), Trichloroethylene (TCE) and Tetrachloroethylene (PCE) . VCHs concentrations were monitored in air around the factories. Sampling sites were densely arranged at intervals from 20m to 100m for the VCHs. Sampling rates of the passive sampling method were calculated on the basis of the concentration by the active sampling method (MCF: 0.387, TCE: 0.241, PCE: 0.252) . Average PCE concentrations around the two drycleaning factories (13.4, 74.9 μg/m<SUP>3</SUP>) and average TCE concentration around the metal-washing factory (65.2μg/m<SUP>3</SUP>) were higher than those in general environment atmosphere in Sendai city. Distributions of the VCHs around the factories seem to be affected by the structure of vicinity buildings and wind velocity as well as wind direction.
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