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Journal of Physical and Chemical Reference Data : Physical-Chemical Property Data for Dibenzo-p-dioxin (DD), Dibenzofuran (DF), and Chlorinated DD/Fs: A Critical Review and Recommended Values

By Annika Åberg; Matthew MacLeod and Karin Wiberg

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Book Id: WPLBN0002169568
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 14 November 2008

Title: Journal of Physical and Chemical Reference Data : Physical-Chemical Property Data for Dibenzo-p-dioxin (DD), Dibenzofuran (DF), and Chlorinated DD/Fs: A Critical Review and Recommended Values  
Author: Annika Åberg; Matthew MacLeod and Karin Wiberg
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Journal of Physical and Chemical Reference Data Collection
Historic
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Publisher: American Institute of Physics

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Åberg, A., & And Karin Wiberg, M. M. (n.d.). Journal of Physical and Chemical Reference Data : Physical-Chemical Property Data for Dibenzo-p-dioxin (DD), Dibenzofuran (DF), and Chlorinated DD/Fs: A Critical Review and Recommended Values. Retrieved from http://worldjournal.org/


Description
Description: Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are of global concern due to their persistence, their tendency to bioaccumulate, and their extremely high toxicity. The fate of the PCDD/Fs in the environment is largely determined by their physical-chemical properties, such as solubility in water (SW, mol m−3), solubility in octanol (SO, mol m−3), and vapor pressure (P, Pa). It is not unusual that the range of reported values for a given property varies over several orders of magnitude, especially for the highly chlorinated congeners, and consequently, it is a challenge to select physical-chemical property data from the literature for use in chemical fate and risk assessments. In the current study, physical-chemical property data [P, SW, SO, Henry’s law constant (H), partitioning coefficients between octanol-water (KOW) and octanol-air (KOA)] for 15 DDs and 17 DFs at 293–299 K are compiled from the literature and evaluated to select literature derived values that are then adjusted to conform to thermodynamic constraints using a least-squares adjustment procedure. We also present an analysis of available data on internal energies of phase change (ΔUA, ΔUW, ΔUO, ΔUOW, ΔUAW, ΔUOA) at 298 K, which describe the temperature dependence of the partitioning properties. The final adjusted values (FAVs) derived from this study are recommended as physical-chemical property data for PCDD/Fs for use in environmental fate modeling. The FAVs for internal energies of phase change can be used as a first approximation for estimating properties at temperatures other than 298 K.

 
 


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