Occurrence and dynamics of polychlorinated dibenzo-p-dioxins and dibenzofurans and polycyclic aromatic hydrocarbons in the mixed surface layer of remote coastal and offshore waters of the Baltic

Large volumes of seawater from 3 coastal and 6 offshore stations in the Baltic sea were filtered on-site to yield particulate and apparently-dissolved fractions. These were analysed by gas chromatography/mass spectrometry for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), and PAH. Com...

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Bibliographic Details
Published in:Environmental science & technology 1991-11, Vol.25 (11), p.1850-1864
Main Authors: Broman, Dag, Naef, Carina, Rolff, Carl, Zebuehr, Yngve
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Marine
Natural water pollution
Pollution
Seawaters, estuaries
Water treatment and pollution
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Summary:Large volumes of seawater from 3 coastal and 6 offshore stations in the Baltic sea were filtered on-site to yield particulate and apparently-dissolved fractions. These were analysed by gas chromatography/mass spectrometry for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), and PAH. Compounds associated with particulate matter correlated with lipid content, not particulate organic carbon. Those in the dissolved fraction weakly correlated with DOC. The average concentrations of particle-associated and dissolved PCDD/F were 230 and 120 pg per m3, respectively; corresponding figures for PAH were 190 and 530 ng per m3. Fugacity ratios for these compounds, being less than 1, indicated net transport from air to water. Logarithmic values of the following partition coefficients for PCDD/F and PAH were respectively: particulate organic carbon/water 6.6-8.5 and 6.3-8.3; DOC/water were 2-3 orders of magnitude lower; octanol/water 7.1-8.7 and 6.8-8.5. There are 64 references.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00023a002