Web Release Date: June 1,
Mechanistic Relationships among PCDDs/Fs, PCNs, PAHs, ClPhs, and ClBzs in Municipal Waste Incineration
and
Department of Environmental Engineering, Pusan National University, Pusan, Korea, Office of Research and Development, National Risk Management Research Laboratory, U.S. Environmental Protection Agency (E305-01), Research Triangle Park, North Carolina, 27711, and ARCADIS G & M, P.O. Box 13109, Research Triangle Park, North Carolina 27709
Received for review December 14, 2006
Revised manuscript received April 9, 2007
Accepted April 24, 2007
Abstract:
An extensive investigation was conducted to understand polychlorinated dibenzo-p-dioxin and furan (PCDD/F) formation mechanisms and their relationship with other organic compounds. PCDD/F, chlorophenols (ClPhs), chlorobenzenes (ClBzs), polyaromatic hydrocarbons (PAHs), and polychlorinated naphthalenes (PCNs) were analyzed in the boiler exit gases of a field-scale municipal solid waste incinerator under various operating conditions. The TEQ value and the concentration of target compounds changed with incinerator operating conditions. Low mass PAHs and 246-triClPh increased dramatically during shut downs; the latter was associated with increased 1368- and 1379-TeCDD. A strong correlation was observed between PCNs and PCDFs and adjacent PCNs homologue group were closely related to each other. This suggested that PCN formation is related with chlorination/dechlorination mechanisms similar to PCDFs. PCDDs were related with most of the ClPhs and the high chlorinated benzenes. Most of target compounds except PAHs had a positive correlation (R 2 > 0.5) with TEQ and half of them showed a good relationship (R 2 > 0.8) with PCDDs/Fs toxic equivalency (TEQ).
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