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A batch-type, controlled-air incinerator was used for the
treatment of oily sludge and plastic waste mixtures. Those
concentration and composition of 21 individual PAHs(Polycyclic
Aromatic Hydrocarbon) in the rawwastes, flue gas ( gas and
Particle phases), and ash were determined. Stack flue-gas
samples were collected by a PAH stack-sampling system. Twenty
one individual PAHs were analyzed promarily by a gas
chromatography and a gas chromatography/mass spectrometer.
Total-PAH concentration in flue gas and its composition in ash
averaged 648ug/m3 and 3.03 ug/g, respectively. Phase
distribution of total-PAH in the flue gas was mainly in gas
phase (93.5%) with a mean-concentration of 606ug/m3, while the
total-PAH concentration in particle phase (averaged 42.0ug/m3)
only represented a small fraction (6%) for the total-PAH mass
collected. In the gas phase of stack flue-gas, Nap had highest
mean- concentration (495ug/m3), while DBA had lowest mean-
concentration (0.61ug/m3) among these twenty one individual
PAHs. In the particle phase, COR and CHR were found to be with
highest and lowest mean-concentration (COR:13.4ug/m3 and CHR:
0.24ug/m3), respectively. In ash, BaA had highest mean-
composition (0.40ug/g), while Flu had lowest mean-composition
(0.04 ug/g). After evalution the PAHs mass from three input
sources (diesel , ambient air, and waste mixtures) of
incinerator, the diesel was found to be with the highest
fraction (averaged 99.5) entered the incinerator. The PAH-mass
input/output ratio were between 0.004 and 0.289. This results
indicated that most of PAHs entered the incinerator had been
destroyed during the combustion process. THerefore, the oily
sludge treated by the incineration process can reduce the total-
PAH mass been discharged to the environment.
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