Gas/particle partitioning of polychlorinated dibenzo-p-dioxins and dibenzofurans in atmosphere; evaluation of predicting models
SCIE
SCOPUS
- Title
- Gas/particle partitioning of polychlorinated dibenzo-p-dioxins and dibenzofurans in atmosphere; evaluation of predicting models
- Authors
- Oh, JE; Choi, JS; Chang, YS
- Date Issued
- 2001-08
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- The gas/particle partitioning of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) was measured at three sites for a year in order to monitor the variation of PCDD/Fs levels and describe their partitioning. The air concentrations of PCDD/Fs ranged from 71 to 1161 fg I-TEQ/m(3) and large changes in these levels did not correlate with seasonal changes during this study. Different homolog patterns were observed in the gas/particle phase. High chlorinated dioxin/furans dominated the particle phase while low chlorinated dioxin/furans dominated the gas phase. The high correlation coefficient between log [(PCDD/Fs(vap))(TSP)/(PCDD/Fs(pat))] and 1/T was observed in lower chlorinated dioxin/furans unlike in OCDD/F. The slope of homolog ranged from - 0.410 to - 1.025 and that of 2,3,7,8-substituted isomers ranged from -0.379 to -0.772 in plots of the log partition coefficient (K(p)) versus the log subcooled vapor pressure (P(L)(o)). The octanol/air partition coefficient (K(oa))-based model of PCDD/Fs is more compatible with experimental data than those of the Junge-Pankow model that tends to overestimate results, even though both models include some level of uncertainty. However, both models can underestimate the particle phase of PCDD/Fs, especially when the ambient air temperature is extremely low in winter. (C) 2001 Elsevier Science Ltd. All rights reserved.
- Keywords
- PCDD/Fs; gas/particle partitioning; model; ORGANIC-COMPOUNDS; VAPOR-PRESSURE; GAS; AIR; PCDD/FS; TEMPERATURE; COEFFICIENT; PCBS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19432
- DOI
- 10.1016/S1352-2310(01)00201-1
- ISSN
- 1352-2310
- Article Type
- Article
- Citation
- ATMOSPHERIC ENVIRONMENT, vol. 35, no. 24, page. 4125 - 4134, 2001-08
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