|
1G - Long-range transport of pollutants (chemicals) (WEP/4) Persistent organic pollutants (POP) and polybrominated diphenylethers (PBDE) in deposition and other environmental samples. Kerst, Melanie1, Reifenhäuser, Werner1, Körner, Wolfgang1, 1 Bavarian Environmental Protection Agency, Augsburg, Germany ABSTRACT- Persistent organic pollutants (POP) including polychlorinated biphenyls (PCB) as well as organic chlorinated pesticides are widespread in the environment. Although use has been minimized there is still an input into environmental compartments due to long range transport and atmospheric deposition. At present, little is known about the actual deposition concentrations - given in ng m-2 d-1 - of these compounds. A continuous monitoring of the atmospheric import of POP is necessary to identify input sources of these substances and to control the success of specific measures set up to reduce emission. Additionally, relatively new classes of substances such as polybrominated diphenylethers (PBDE) widely used as flame retardants become more and more relevant, because the production and use of those compounds is still high. Therefore, it is necessary to focus on the fate of these compounds in environmental samples by extending current monitoring programs to include PBDE as quickly as possible. During a period of eight months deposition samples were taken every two weeks at Augsburg, Bavaria, Germany using the funnel adsorber method (DIN 19739). Organic pollutants were trapped on XAD-2 resin cartridges which were subsequently Soxhlet extracted 24 h with toluene. After several clean-up steps, samples were analyzed for chlorinated pesticides, PCB and PBDE by GC/MS. PCB deposition rates were between 270 and 800 ng m-2 d-1 (sum of 6 indicator congeners times 5 according to German guideline DIN 51527). HCHs ( Key words: persistent organic pollutants, deposition, chlorinated pesticides, polybrominated diphenylethers |
, 
, 
, 
), op'- and pp'-DDEs, -DDDs and -DDTs were determined in the low ng m-2 d-1 range. A comparison of concentrations in deposition samples to levels in plant samples taken at the same site will be performed. The financial support of the Bavarian State Ministry for Environmental Affairs (project no. 7030) is gratefully acknowledged.