中文摘要：

以华南某城市生活垃圾焚烧厂一期（WI-A）和二期（WI-B）为研究对象,采集了飞灰和烟气样品,通过GC/MS对其中PCBs和PCNs的全部单体进行了测定,分析了PCBs和PCNs的固气分布（飞灰和烟气中的总量比例）、同系物分布以及毒性当量特征.结果表明,WI-A和WI-B焚烧单位垃圾产生的PCBs和PCNs总量分别为0.397 mg·t^-1（湿基）和0.363 mg·t^-1（湿基）.活性炭喷射量对PCBs的固气分布特征和去除率影响较大,对PCNs则不明显.PCBs同系物在烟气中以低氯取代单体为主,在飞灰中以高氯取代单体为主.PCNs同系物在烟气中以五氯单体为主,在飞灰中以四氯、五氯单体为主.WI-A和WI-B排放的烟气总TEQ分别为0.051 ng TEQ·Nm^-3和0.096 ng TEQ·Nm^-3,WI-A烟气Co-PCBs和Dl-PCNs对总TEQ的贡献率分别为3.2%和0.13%,WI-B烟气Co-PCBs和Dl-PCNs对总TEQ的贡献率分别为5.3%和0.34%,提示垃圾焚烧排放烟气中的Co-PCBs和Dl-PCNs的毒性同样值得关注.

英文摘要：

Individual congeners of polychlorinated biphenyl （PCB） and polychlorinated naphthalene （PCN） were determined in the stack gas and fly ash from the two phases of a municipal solid waste incinerator （MSWI） in South China using GC/MS. In addition, the particle/gas partitioning, congener patterns, and toxic equivalents （TEQ） of PCBs and PCNs were characterized. The total PCBs and PCNs released from phase one （WI-A） and phase two （WI-B） were 0.397 mg·t^-1 and 0.363 mg.t 1 of wet waste, respectively. The injection rate of activated carbon significantly affected the particle/gas partitioning and removal efficiency of PCBs, while not for that of PCNs. In stack gas samples, lower chlorinated congeners and penta-CNs dominated the profiles of PCB and PCN, respectively; while in fly ash samples, higher chlorinated congeners and tetra- to penta-CNs dominated instead. The total TEQ of stack gas from WI-A and WI-B were O. 051 ng·Nm^-3 and 0.096 ng·Nm^-3, respectively. The contributions of coplanar PCBs （Co-PCBs） and dioxin-like PCNs （D1-PCNs） to the total TEQ were 3.2% and 0.13% for WI-A, and 5.3% and 0.34% for WI-B,respectively, implying that the toxicity of Co-PCBs and D1-PCNs released by MSWI deserves serious attention.