Abstract
Abstract To meet the emission standards that become more and more stringent, the waste incinerators are commonly equipped with various air pollution control devices. Gas/particulate phase distribution of polychlorinated dibenzo-p-doxin and furan (PCDD/F) in stack gas could be much different when different control technologies are applied. This study evaluates PCDD/F congener distributions at the stack gas of a municipal waste incinerator (MWI) and ambient air in northern Taiwan via stack gas and ambient air sampling and analysis. Ambient air samples were taken in the vicinity area of a large-scale MWI for measuring PCDD/F concentrations and partitioning gas/particulate phase from November 1999 through January 2001. Stack gas samples of the MWI were taken during the period of ambient air sampling. The PCDD/F concentrations measured in fall and winter seasons are significantly higher than those measured in summertime. In addition, the results obtained on gas/particulate partitioning of ambient air samples indicate that the particulate-phase PCDD/Fs account for more than 80% of the total concentration. Nevertheless, the gas/particulate partitioning of stack gas PCDD/F sample was completely different from that of the ambient air samples. The gas-phase PCDD/Fs account for more than 85% of the total concentration in MWI stack gas. This study also indicates that as the chlorination level of PCDD/F congeners increases, the percentage of PCDD/Fs existing in gas phase decreases in either ambient air or stack gas of MWI. Furthermore, the temperature in ambient air also affects the percentage of particle-bound dioxins. As the ambient air temperature decreases by 10°C, the percentage of PCDD/Fs in particulate phase increases around 20%. PCDFs account for about 80% of the I-TEQ concentrations for stack gas and ambient air sample, among them the 2,3,4,7,8-PeCDF is the major contributor, accounting for 30–55% of the total I-TEQ.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
