Occurrence and Air-sea exchange of phthalates in the Arctic

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Air and seawater samples were taken simultaneously to investigate the distribution and air-sea gas exchange of phthalates in the Arctic onboard the German Research Ship FS Polarstem. Samples were collected on expeditions ARK XX12 from the Noith Sea to the high Arctic (600 degrees N-85 degrees N) in the summer of 2004. The concentration of Sigma(6) phthalates (dimethyl phthalate (DMP), diethyl phthalate (DEP), di-i-butyl phthalate (DiBP), di-n-butyl phthalate (DnBP), butylbenzyl phthalate (EBP), and diethylhexyl phthalate (DEHP)) ranged from 30 to 5030 pg L-1 in the aqueous dissolved phase and from 1110 to 3090 pg m(-3) in the atmospheric gas phase. A decreasing latitudinal trend was present in the seawater and to a lesser degree in the atmosphere from the Norwegian coast to the high Arctic. Overall, deposition dominated the air-sea gas exchange for DEHP, while volatilization from seawater took place in the near-coast environment. The estimated net gas deposition of DEHP was 5, 30, and 190 t year(-1) for the Norwegian Sea, the Greenland Sea, and the Arctic, respectively. This suggests that atmospheric transport and deposition of phtha ates is a significant process for their occurrence in the remote Atlantic and Arctic Ocean.
OriginalspracheEnglisch
ZeitschriftEnvironmental Science & Technology
Band41
Ausgabennummer13
Seiten (von - bis)4555-4560
Anzahl der Seiten6
ISSN0013-936X
DOIs
PublikationsstatusErschienen - 01.07.2007

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