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Persistent organic pollutants (POPs) in the atmosphere of coastal areas of the Ross Sea, Antarctica: Indications for long-term downward trends

K. Pozo, T. Martellini, S. Corsolini, T. Harner, V. Estellano, P. Kukučka, MD. Mulder, G. Lammel, A. Cincinelli,

. 2017 ; 178 (-) : 458-465. [pub] 20170227

Language English Country England, Great Britain

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc17023176

Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m(-3). In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs. While HCB concentrations were in the same range as those reported in the atmosphere of other Antarctic sampling areas and did not show a decline, HCHs and DDTs levels were lower or similar to those determined one or two decades ago. In general, the very low concentrations reflected the pristine state of the East Antarctica air. Backward trajectories indicated the prevalence of air masses coming from the Antarctic continent. Local contamination and volatilization from ice were suggested as potential sources for the presence of persistent organic pollutants in the atmosphere.

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$a Pozo, Karla $u Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy; Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic; Facultad de Ciencias, Universidad Católica Santísima Concepción, Concepción, Chile.
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$a Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m(-3). In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs. While HCB concentrations were in the same range as those reported in the atmosphere of other Antarctic sampling areas and did not show a decline, HCHs and DDTs levels were lower or similar to those determined one or two decades ago. In general, the very low concentrations reflected the pristine state of the East Antarctica air. Backward trajectories indicated the prevalence of air masses coming from the Antarctic continent. Local contamination and volatilization from ice were suggested as potential sources for the presence of persistent organic pollutants in the atmosphere.
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$a Martellini, Tania $u Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Florence, Italy.
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$a Corsolini, Simonetta $u Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy.
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$a Harner, Tom $u Air Quality Processes Research Section, Environment Canada, Toronto, Ontario, Canada.
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$a Estellano, Victor $u Department of Physical, Earth and Environmental Sciences, University of Siena, Siena, Italy.
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$a Kukučka, Petr $u Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic.
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$a Mulder, Marie D $u Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic.
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$a Lammel, Gerhard $u Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic; Max Planck Institute for Chemistry, Multiphase Chemistry Dept., Mainz, Germany.
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$a Cincinelli, Alessandra $u Department of Chemistry "Ugo Schiff", University of Florence, Sesto Fiorentino, Florence, Italy; Institute for the Dynamics of Environmental Processes, Italian National Research Council (IDPA-CNR), Dorsoduro, Venice, Italy. Electronic address: acincinelli@unifi.it.
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