Abstract
Besides polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs), their derivatives, completely or partly substituted with bromine, iodine or fluorine (PXDDs/PXDFs/PXBs), are known to be present in the flue gas emitted from waste incineration facilities. However, little is known about the emission levels of these substituted compounds in the flue gas. In this study, the emission levels of semi- and non-volatile organic halogens (SNVOXs) were investigated from ten waste incineration facilities. It was found that some facilities emitted semi- and non-volatile organic bromine (SNVOBr) or semi- and nonvolatile organic iodine (SNVOI) 0.02 to 1.4 times that of semi- and non-volatile organic chlorine (SNVOCI) . In addition, PCDDs/PCDFs/PCBs contributed to only less than 1.4 mol% of SNVOCI. These results indicated that many multiple halogen-substituted compounds were emitted together with chlorine-substituted compounds such as PCDDs/PCDFs/PCBs.
