FORMATION AND EMISSION OF NON-ORTHO CBS AND MONO-ORTHO CBS IN MUNICIPAL WASTE INCINERATION

Non-ortho CBs, Mono-ortho CBs and PCDDS/PCDFs in the exhaust gas and f ly ash from municipal waste incineration were analyzed quantitatively. The results of this quantitative analysis show that the total concent rations of Non-ortho CBs and Mono-ortho CBs are at the same level, but the toxicity equivalent concentration of Mono-ortho CBs in smaller th an that of Non-ortho CBs. The number of samples, however, is too few t o generalize about PCB behavior in municipal waste incineration, and v ery little of the PCB formation mechanism in known. Two different beha viors were observed from the de novo conditions. The other is the rema rkable increase of Non-ortho CBs and Mono-ortho CBs after the treatmen t.