Atmospheric semivolatile organochlorine compounds in European high-mountain areas (central Pyrenees and high Tatras).
Atmospheric samples from two European high-mountain areas showed similar composition of semivolatile organochlorine compounds (SOC), such as polychlorobiphenyls (PCBs), DDTs, endosulfans, hexachlorobenzene (HCB), and hexachlorocyclohexanes (HCHs). Nearly all compounds were predominantly found in the gas phase and only the less volatile such as some PCBs (e.g., 149, 118, 153, 138, and 180) were found in higher abundance in the particulate phase. HCB, 49-85 pg m(-3), is the dominant SOC. This compound is only found in the gas phase exhibiting uniform concentrations irrespective of season and air mass origin. SOC of present use, like HCHs and endosulfans, were found in higher concentrations in the warm periods, 32-46 and 4-10 pg m(-3) in the gas + particulate phases, respectively, reflecting their seasonal pattern of use in many European countries. PCB and 4,4'-DDE, 39-42 and 4-6 pg m(-3) in the gas + particulate phases, respectively, also showed a seasonal trend despite neither the former nor the precursor of the latter (4,4'-DDT) being manufactured with their use drastically restricted since the 1980s. The seasonal differences are mainly due to a higher occurrence of air masses with strong continental inputs in the warm than in the cold periods. In this respect, samples whose air masses traveled at the high troposphere (backward air mass trajectories >6000 m) have been observed to carry considerably smaller PCB and 4,4'-DDE loads (9.3 +/- 2.8 and 0.4 +/- 0.05 pg m(-3), respectively) than overall average.
Department of Environmental Chemistry, Institute of Chemical and Environmental Research (ICER-CSIC), Jordi Girona 18, 08034 Barcelona, Catalonia, Spain.
Barend L
BL
van Drooge
Joan O
JO
Grimalt
Lluis
L
Camarero
Jordi
J
Catalan
Evzen
E
Stuchlík
Carlos J
CJ
Torres García
D000393:Air Pollutants / Q000032:analysis*; D000531:Altitude; D001272:Atmosphere / Q000032:analysis*; D003634:DDT / Q000032:analysis; D004726:Endosulfan / Q000032:analysis; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D005060:Europe; D008401:Gas Chromatography-Mass Spectrometry; D005843:Geography; D006581:Hexachlorobenzene / Q000032:analysis; D001556:Hexachlorocyclohexane / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D016014:Linear Models; D011078:Polychlorinated Biphenyls / Q000032:analysis; D012621:Seasons; D013696:Temperature; D014919:Wind
D000393:Air Pollutants; D006843:Hydrocarbons, Chlorinated; D006581:Hexachlorobenzene; D001556:Hexachlorocyclohexane; D003634:DDT; D011078:Polychlorinated Biphenyls; D004726:Endosulfan