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Title: Temperature dependence of Henry's law constants of thirteen polycyclic aromatic hydrocarbons between 4 C and 31 C

Abstract

An understanding of the temperature dependence of the Henry's law constant for organic contaminant is critical when modeling the transport and fate of these contaminants in the environment. The Henry's law constants for 13 polycyclic aromatic hydrocarbons (PAHs) were experimentally determined between 4 and 31 C using a gas-stripping apparatus. The Henry's law constants ranged between 0.02 {+-} 0.01 Pa m{sup 3}/mol for chrysene at 4 C and 73.3 {+-} 20 Pa m{sup 3}/mol for 2-methylnaphthalene at 31 C. The temperature dependence of each PAH was modeled using the van't Hoff equation to calculate the enthalpy and entropy of phase change. For nine of the PAHs, the present study reports the first experimental measured temperature dependence of their Henry's law constant. The enthalpies of phase change ranged between 35.4 {+-} 1.9 kJ/mol for 1-methylphenanthrene and 100 {+-} 8 kJ/mol for chrysene. These data can be used to extrapolate Henry's law values within the experimental temperature ranges. For all PAHs except benzo[a]fluorene, the temperature dependence can be predicted within a relative standard error {lt}10%.

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Maryland Center for Environmental Science, Solomons, MD (US)
OSTI Identifier:
20006621
Alternate Identifier(s):
OSTI ID: 20006621
Resource Type:
Journal Article
Journal Name:
Environmental Toxicology and Chemistry
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Other Information: PBD: Sep 1999; Journal ID: ISSN 0730-7268
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; POLYCYCLIC AROMATIC HYDROCARBONS; ENVIRONMENTAL TRANSPORT; TEMPERATURE DEPENDENCE; PHASE STUDIES; POLLUTION; ENVIRONMENTAL IMPACTS

Citation Formats

Bamford, H.A., Poster, D.L., and Baker, J.E. Temperature dependence of Henry's law constants of thirteen polycyclic aromatic hydrocarbons between 4 C and 31 C. United States: N. p., 1999. Web. doi:10.1897/1551-5028(1999)018<1905:TDOHSL>2.3.CO;2.
Bamford, H.A., Poster, D.L., & Baker, J.E. Temperature dependence of Henry's law constants of thirteen polycyclic aromatic hydrocarbons between 4 C and 31 C. United States. doi:10.1897/1551-5028(1999)018<1905:TDOHSL>2.3.CO;2.
Bamford, H.A., Poster, D.L., and Baker, J.E. Wed . "Temperature dependence of Henry's law constants of thirteen polycyclic aromatic hydrocarbons between 4 C and 31 C". United States. doi:10.1897/1551-5028(1999)018<1905:TDOHSL>2.3.CO;2.
@article{osti_20006621,
title = {Temperature dependence of Henry's law constants of thirteen polycyclic aromatic hydrocarbons between 4 C and 31 C},
author = {Bamford, H.A. and Poster, D.L. and Baker, J.E.},
abstractNote = {An understanding of the temperature dependence of the Henry's law constant for organic contaminant is critical when modeling the transport and fate of these contaminants in the environment. The Henry's law constants for 13 polycyclic aromatic hydrocarbons (PAHs) were experimentally determined between 4 and 31 C using a gas-stripping apparatus. The Henry's law constants ranged between 0.02 {+-} 0.01 Pa m{sup 3}/mol for chrysene at 4 C and 73.3 {+-} 20 Pa m{sup 3}/mol for 2-methylnaphthalene at 31 C. The temperature dependence of each PAH was modeled using the van't Hoff equation to calculate the enthalpy and entropy of phase change. For nine of the PAHs, the present study reports the first experimental measured temperature dependence of their Henry's law constant. The enthalpies of phase change ranged between 35.4 {+-} 1.9 kJ/mol for 1-methylphenanthrene and 100 {+-} 8 kJ/mol for chrysene. These data can be used to extrapolate Henry's law values within the experimental temperature ranges. For all PAHs except benzo[a]fluorene, the temperature dependence can be predicted within a relative standard error {lt}10%.},
doi = {10.1897/1551-5028(1999)018<1905:TDOHSL>2.3.CO;2},
journal = {Environmental Toxicology and Chemistry},
issn = {0730-7268},
number = 9,
volume = 18,
place = {United States},
year = {1999},
month = {9}
}