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Organochlorine pesticides and polychlorinated biphenyls along an east-to-west gradient in subtropical North Atlantic surface water
Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Research Centre for Toxic Compounds in the Environment, Masaryk University, Brno, Czech Republic.
Centre for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg, Germany.
Research Centre for Toxic Compounds in the Environment, Masaryk University, Brno, Czech Republic.
Centre for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg, Germany.
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2017 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499, Vol. 24, no 12, 11045-11052 p.Article in journal (Refereed) Published
Abstract [en]

Despite the fact that most persistent toxic substances have hardly been primarily emitted for several decades, their concentrations are only slowly decreasing in the global oceans. Surface seawater samples were collected along a 38°-24° N/28°-67° W transect in the subtropical North Atlantic Ocean. While the concentration levels of hexachlorobenzene (2.1-6.1 pg L(-1)), dichlorodiphenyltrichloroethane (DDT, up to 2.1 pg L(-1)) and polychlorinated biphenyls (PCB, 10.8-24.9 pg L(-1)) were in the same range as observed earlier in the North Atlantic, hexachlorocyclohexane (HCH, 90-627 pg L(-1)) was found elevated, partly also relative to previous measurements in the same sea region. Hereby, the ratio α-HCH/γ-HCH was very low, 0.09-0.13. Chlordane and endosulfan were found in the range <3.0-11.1 and <5.8-8.8 pg L(-1) respectively. DDT metabolites, endrin and related pesticides were found below quantification limits. Spatial pollution patterns in surface seawaters seem to be determined by atmospheric and oceanic transport patterns, rather than by mixing and air-sea equilibrium. The comparison with global multicompartment chemistry-transport model predictions of surface seawater levels indicate underestimated degradation of PCBs and overestimated emissions of endosulfan.

Place, publisher, year, edition, pages
Hedielberg, Germany: Springer, 2017. Vol. 24, no 12, 11045-11052 p.
Keyword [en]
Ocean pollution, persistent organic pollutants, trace analytical chemistry, environmental fate
National Category
Environmental Sciences
Research subject
Enviromental Science
Identifiers
URN: urn:nbn:se:oru:diva-51747DOI: 10.1007/s11356-016-7429-zISI: 000399399700014PubMedID: 27539468Scopus ID: 2-s2.0-84982315560OAI: oai:DiVA.org:oru-51747DiVA: diva2:1093980
Note

Funding Agencies:

Max Planck Society

Czech Ministry of Education  LO1214

Available from: 2016-08-23 Created: 2017-05-08 Last updated: 2017-05-16Bibliographically approved

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School of Science and Technology, Örebro University, Sweden
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