Passive sampling of nonpolar contaminants at three deep-ocean sites
Concentrations of polychlorinated biphenyls, polyaromatic hydrocarbons, hexachlorobenzene, and DDE were determined by passive sampling (semipermeable membrane devices) with exposure times of 1-1.5 years at 0.1-5 km depth in the Irminger Sea, the Canary Basin (both North Atlantic Ocean), and the Moza...
| Published in: | Environmental Pollution |
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| Main Authors: | , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://research.vu.nl/en/publications/bca373b3-bdf4-4faf-87e5-7139f3673758 https://doi.org/10.1016/j.envpol.2014.08.013 https://hdl.handle.net/1871.1/bca373b3-bdf4-4faf-87e5-7139f3673758 |
| Summary: | Concentrations of polychlorinated biphenyls, polyaromatic hydrocarbons, hexachlorobenzene, and DDE were determined by passive sampling (semipermeable membrane devices) with exposure times of 1-1.5 years at 0.1-5 km depth in the Irminger Sea, the Canary Basin (both North Atlantic Ocean), and the Mozambique Channel (Indian Ocean). The dissipation of performance reference compounds revealed a pronounced effect of hydrostatic pressure on the sampler-water partition coefficients. Concentrations in the Irminger Sea were uniform over the entire water column (0.1-3 km). At the Canary Basin site, concentrations were 2-25 times lower near the bottom (5 km) than at 1.4 km. Concentrations in the Mozambique Channel (0.6-2.5 km) were lower than at the other two locations, and showed a near-bottom maximum. The data suggest that advection of surface waters down to a depth of about 1 km is an important mechanism of contaminant transport into the deep ocean. |
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