Neue Verfahren und Methoden zur Sanierung von Altlasten - am Beispiel der Deponie Georgswerder, Hamburg. T. 9: Nachweis und Quantifizierung halogenierter Dibenzo-p-dioxine und Dibenzofurane Schlussbericht

Tasks of the project: Analysis of materials from the Georgswerder disposal site before and after biological, mecanical (water) and chemical (oil) treatment. Optimization of analytical methods for the determination of polychlorinated dibenzo-p-dioxins (PCDD) and -furans (PCDF), identification or organic pollutants and provision of analytical capacity. Main emphasis of the work; mass spectrometric high resolution determination of PCDD/DF. Results for PCDD/DF-determintion methods: Development of a quick and simple clean-up method for water samples. Extension of the method to oil-, sediment- and mineralic matrices by further clean-up steps. Resutls of PCDD/DF-analyses: PCDD/DF occurred at levels of 500 to 5000 fg/g in the static water of the disposal site, even if a separate oil-phase was not observed in the well. Mecanical treatment (flotation) resulted in elimination rates in excess of 90% of PCDD/DF from the water, if the input load was high. At low load the elimination rate dropped to 35%. PCDD/DF input into the biological treatment plant was too low to permit monitoring within the plant. Condensation from the gas produced at the disposal site contained low amounts of PCDD/DF. Oils from the site were dechlorinated by pyrolysis, sodium treatment and electrochemically. PCVDD/DF were substantially reduced by these treatments. Results of identification of organic compounds: Mainly compounds from the oil-phase and technical products were found in static disposal site water. Chlorobenzenes were important chlorinated contaminants. Organics were reduced by biological treatment, but pollutants like chlorobenzenes survived and could only be removed by charcoal-absorption. The condensation from the gas contained not only volatiles but also higher boiling compounds, including chloroaromatics. Polar components were not found in the condensate. (orig.)Available from TIB Hannover: QN 82(9)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany); Umweltbehoerde, Hamburg (Germany). Amt fuer AltlastensanierungDEGerman