Summary
The pattern of polychlorinated biphenyls (PCB) found in fly ash and particulates collected in the flue gas of municipal waste incinerators (MWI) has been identified by HRGC/MSD. If not the PCB contamination of the waste input is dominating, it differs characteristically from that of the technical PCB-mixtures. In MWI-processes polychlorobiphenyls can be formed by dimerisation of chlorobenzenes (PCBz) or monobromo-chlorobenzenes via a radical mechanism as structural correlation between PCBz and PCB in MWI-effluents indicate. The pattern of the trichloro- and tetrachloro-benzenes make a homolytic chlorination of benzene, chlorobenzene or dichlorobenzenes, as the reaction pathway most likely. The distribution between the chlorohomologues can differ, with the tetrachloro-, the pentachloroor the hexachlorobenzene as the maximum.
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Ballschmiter, K., Niemczyk, R., Schäfer, W. et al. Isomer-specific identification of polychlorinated benzenes (PCBz) and -biphenyls (PCB) in effluents of Municipal waste incineration. Z. Anal. Chem. 328, 583–587 (1987). https://doi.org/10.1007/BF00468973
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DOI: https://doi.org/10.1007/BF00468973