Contributions of dry and wet depositions of polychlorinated dibenzo-p-dioxins and dibenzofurans to a contaminated site resulting from a penetachlorophenol manufacturing process
| Autor: | Shizoom Wang, Lin C. Wang, Hwang J. Chang, Ya F. Wang, Hsing W. Li |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Pollution
Persistent organic pollutant Pentachlorophenol Polychlorinated Dibenzodioxins media_common.quotation_subject Industrial Waste General Medicine Management Monitoring Policy and Law Contamination Soil contamination chemistry.chemical_compound Flux (metallurgy) Deposition (aerosol physics) chemistry Environmental chemistry Soil water General Environmental Science media_common Benzofurans Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 175(1-4) |
| ISSN: | 1573-2959 |
| Popis: | The soils at a factory for manufacturing pentachlorophenol were heavily contaminated by polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). In order to verify the contributions of dry and wet deposition of PCDD/Fs from the ambient air, the concentration of PCDD/Fs in ambient air and soil were measured, the partition of particle- and gas-phases of atmospheric PCDD/Fs was calculated, and the annual fluxes of total dry and wet PCDD/F depositions were modeled. Average atmospheric PCDD/F concentration was 1.24 ng Nm − 3 (or 0.0397 ng I-TEQ Nm − 3). Moreover, over 92.8% of total PCDD/Fs were in the particle phase, and the dominant species were high chlorinated congeners. The total PCDD/F fluxes of dry and wet deposition were 119.5 ng m − 2 year − 1 (1.34 ng I-TEQ m − 2 year − 1) and 82.0 ng m − 2 year − 1 (1.07 ng I-TEQ m − 2 year − 1), respectively. By scenario simulation, the total fluxes of dry and wet PCDD/F depositions were 87.1 and 68.6 ng I-TEQ, respectively. However, the estimated PCDD/F contents in the contaminated soil were 839.9 μ g I-TEQ. Hence, the contributions of total depositions of atmospheric PCDD/F were only 0.02%. The results indicated that the major sources of PCDD/F for the contaminated soil could be attributed to the pentachlorophenol manufacturing process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink