Nizzetto, Luc and Lohmann, Rainer and Gioia, Rosalinda and Jahnke, Annika and Temme, Christian and Dachs, Jordi and Herckes, Pierre and Di Guardo, Antonio and Jones, Kevin C. (2008) PAHs in air and seawater along a north-south Atlantic transect: trends, processes and possible sources. Environmental Science & Technology, 42 (5). pp. 1580-1585. ISSN 0013-936XFull text not available from this repository.
Polycyclic aromatic hydrocarbons (PAHs) were simultaneously measured in air and surface seawater between 49° N and 25° S in the open Atlantic Ocean. Elevated concentrations of PAHs (Σ10 PAHs ≈ 1.4–2.5 ng m−3 air, and 0.7–1 ng L−1 seawater) occurred in the Biscay Bay and off the northwest coast of Africa. The unexpectedly high concentrations off NW Africa were discussed assessing the possible contribution of the emerging oil industry along the African shore, the role of biomass burning and natural sources of PAHs. In the southern Atlantic, concentrations of PAHs were close to detection limits (Σ10 PAHs ≈ 0.02–0.5 ng m−3 air, and 0.06–0.5 ng L−1 seawater) and showed decreasing trends with increasing latitudes. Correlations of PAHs’ partial pressures versus inverse temperature were not significant, in contrast to results for polychlorinated biphenyls from the same transect. This could have been due to the importance of ongoing primary sources and the shorter atmospheric life-times of PAHs. Air–water fugacity ratios (fa/fw) were calculated for selected compounds. They were close to 1 for fluoranthene and pyrene in remote open ocean areas suggesting air–water partitioning near equilibrium. Ratios for anthracene and phenanthrene were <0.3 in the remote tropical Atlantic, suggesting net volatilization.
|Journal or Publication Title:||Environmental Science & Technology|
|Subjects:||G Geography. Anthropology. Recreation > GE Environmental Sciences|
|Departments:||Faculty of Science and Technology > Lancaster Environment Centre|
|Deposited By:||Mr Richard Ingham|
|Deposited On:||06 Nov 2009 09:57|
|Last Modified:||26 Jul 2012 16:44|
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