Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters
Accurate knowledge of Henry's law constants (Kaw) is very important for fate and transport studies of organic chemicals. Here field-derived Kaw values for polychlorinated biphenyl (PCB) congeners (PCBs 28, 49, 52, 118, 138, 149, and 153) were determined in the open Atlantic Ocean, at locations where air and seawater were assumed to be at equilibrium. Field-based Kaw values were derived from air and seawater samples simultaneously collected at these locations, and their relationship with temperature was determined. The average field-derived Kaw for PCBs 28, 49, 52, 118, and 138 was generally 2–3 times higher than laboratory-derived values reported in the literature. Possible causes of differences between the field and the laboratory data may be attributed to differences between pure water and seawater and the use of much higher persistent organic pollutant concentrations in laboratory studies compared to that of the remote ocean. Field-derived Kaw values for PCB 149 and PCB 153 were up to 10 times higher than literature values. The comparison of field- and laboratory-derived Kaw shows that their temperature dependence is not significantly different (95% confidence) from those reported in the literature.
Main Authors: | , , , , |
---|---|
Format: | artículo biblioteca |
Language: | English |
Published: |
American Geophysical Union
2010
|
Subjects: | Henry's law constant, PCBs, Air-water exchanges, |
Online Access: | http://hdl.handle.net/10261/44900 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-idaea-es-10261-44900 |
---|---|
record_format |
koha |
spelling |
dig-idaea-es-10261-449002016-02-17T08:32:51Z Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters Gioia, Rosalinda Dachs, Jordi Lohmann, Rainer Jones, Kevin C. Nizzeto, Luca Henry's law constant PCBs Air-water exchanges Accurate knowledge of Henry's law constants (Kaw) is very important for fate and transport studies of organic chemicals. Here field-derived Kaw values for polychlorinated biphenyl (PCB) congeners (PCBs 28, 49, 52, 118, 138, 149, and 153) were determined in the open Atlantic Ocean, at locations where air and seawater were assumed to be at equilibrium. Field-based Kaw values were derived from air and seawater samples simultaneously collected at these locations, and their relationship with temperature was determined. The average field-derived Kaw for PCBs 28, 49, 52, 118, and 138 was generally 2–3 times higher than laboratory-derived values reported in the literature. Possible causes of differences between the field and the laboratory data may be attributed to differences between pure water and seawater and the use of much higher persistent organic pollutant concentrations in laboratory studies compared to that of the remote ocean. Field-derived Kaw values for PCB 149 and PCB 153 were up to 10 times higher than literature values. The comparison of field- and laboratory-derived Kaw shows that their temperature dependence is not significantly different (95% confidence) from those reported in the literature. Department of the Environment, Food and Rural Affairs (DEFRA) and the Natural Environment Research Council (NERC) on persistent organic pollutants at Lancaster University and the Spanish Ministry of Science and innovation through the MIMOSA and ATOS projects. Peer reviewed 2012-01-30T11:52:06Z 2012-01-30T11:52:06Z 2010 artículo http://purl.org/coar/resource_type/c_6501 Journal of Geophysical Research Oceans 0148-0227 http://hdl.handle.net/10261/44900 10.1029/2008JC005054 en http://dx.doi.org/10.1029/2008JC005054 open American Geophysical Union |
institution |
IDAEA ES |
collection |
DSpace |
country |
España |
countrycode |
ES |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-idaea-es |
tag |
biblioteca |
region |
Europa del Sur |
libraryname |
Biblioteca del IDAEA España |
language |
English |
topic |
Henry's law constant PCBs Air-water exchanges Henry's law constant PCBs Air-water exchanges |
spellingShingle |
Henry's law constant PCBs Air-water exchanges Henry's law constant PCBs Air-water exchanges Gioia, Rosalinda Dachs, Jordi Lohmann, Rainer Jones, Kevin C. Nizzeto, Luca Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
description |
Accurate knowledge of Henry's law constants (Kaw) is very important for fate and transport studies of organic chemicals. Here field-derived Kaw values for polychlorinated biphenyl (PCB) congeners (PCBs 28, 49, 52, 118, 138, 149, and 153) were determined in the open Atlantic Ocean, at locations where air and seawater were assumed to be at equilibrium. Field-based Kaw values were derived from air and seawater samples simultaneously collected at these locations, and their relationship with temperature was determined. The average field-derived Kaw for PCBs 28, 49, 52, 118, and 138 was generally 2–3 times higher than laboratory-derived values reported in the literature. Possible causes of differences between the field and the laboratory data may be attributed to differences between pure water and seawater and the use of much higher persistent organic pollutant concentrations in laboratory studies compared to that of the remote ocean. Field-derived Kaw values for PCB 149 and PCB 153 were up to 10 times higher than literature values. The comparison of field- and laboratory-derived Kaw shows that their temperature dependence is not significantly different (95% confidence) from those reported in the literature. |
format |
artículo |
topic_facet |
Henry's law constant PCBs Air-water exchanges |
author |
Gioia, Rosalinda Dachs, Jordi Lohmann, Rainer Jones, Kevin C. Nizzeto, Luca |
author_facet |
Gioia, Rosalinda Dachs, Jordi Lohmann, Rainer Jones, Kevin C. Nizzeto, Luca |
author_sort |
Gioia, Rosalinda |
title |
Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
title_short |
Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
title_full |
Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
title_fullStr |
Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
title_full_unstemmed |
Field-derived Henry's law constants for polychlorinated biphenyls in oceanic waters |
title_sort |
field-derived henry's law constants for polychlorinated biphenyls in oceanic waters |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://hdl.handle.net/10261/44900 |
work_keys_str_mv |
AT gioiarosalinda fieldderivedhenryslawconstantsforpolychlorinatedbiphenylsinoceanicwaters AT dachsjordi fieldderivedhenryslawconstantsforpolychlorinatedbiphenylsinoceanicwaters AT lohmannrainer fieldderivedhenryslawconstantsforpolychlorinatedbiphenylsinoceanicwaters AT joneskevinc fieldderivedhenryslawconstantsforpolychlorinatedbiphenylsinoceanicwaters AT nizzetoluca fieldderivedhenryslawconstantsforpolychlorinatedbiphenylsinoceanicwaters |
_version_ |
1777669214167891968 |