Concentrations,profiles and gas-particle partitioning of PCDD/Fs,PCBs and PBDEs in the ambient air of an E-waste dismantling area,southeast China  

作　　者：LI YingMing JIANG GuiBin WANG YaWei WANG Pu ZHANG QingHua 

机构地区：[1]State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, ChineseAcademy of Sciences, Beijing 100085, China

出　　处：《Chinese Science Bulletin》2008年第4期521-528,共8页

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 20607025,20777079 and 20737007)

摘　　要：Polychlorinated diebenzo-p-dioxins(PCDDs),polychlorinated diebenzofurans(PCDFs),polychlorinated biphenyls(PCBs) and polybrominated diphenyl ethers(PBDEs) were monitored in the ambient air of Taizhou,an E-waste dismantling area of southeast China to evaluate their concentrations,profiles and gas-particle partitioning.The ΣPCDD/Fs concentrations ranged from 2.91 to 50.6 pg/m3,with an average of 14.3 pg/m3.The I-TEQs for PCDD/Fs were in the range of 0.20-3.45 pg/m3,with an average of 1.10 pg/m3.The ΣPCBs concentrations and TEQs ranged from 4.23 to 11.35 ng/m3,0.050 to 0.859 pg(TEQ)/m3,respectively.The concentrations of ΣPBDEs ranged from 92 to 3086 pg/m3,with an average of 894 pg/m3.The pollution levels of PCDD/Fs,PCBs and PBDEs were higher than other urban sites,which may be associated with the E-waste dismantling activities.The PCDD/Fs were found exclusively in the particle phase whereas PCBs distributed dominantly in the gas phase.The gas-partilce partitioning was also assessed by correlating the gas-particle partition coefficient(Kp) with the subcooled liquid vapor pressure(PL0).The measured particulate sorptions of PCDD/Fs,PCBs and PBDEs were compared with the predictions from Junge-Pankow model and Koa absorption model.The Junge-Pankow model well estimated the particulate fractions of PCBs.However,it underestimated the sorptions of PCDD/Fs and overestimated the fractions of PBDEs.The predicted particulate fractions of PCDD/Fs and PCBs from Koa model fitted well with the measured data.Polychlorinated diebenzo-p-dioxins （PCDDs）, polychlorinated diebenzofurans （PCDFs）, polychlorinated biphenyls （PCBs） and polybrominated diphenyl ethers （PBDEs） were monitored in the ambient air of Taizhou, an E-waste dismantling area of southeast China to evaluate their concentrations, profiles and gas-particle partitioning. The ∑PCDD/Fs concentrations ranged from 2.91 to 50.6 pg/ma, with an average of 14.3 pg/ma. The I-TEQs for PCDD/Fs were in the range of 0.20-3.45 pg/ma, with an average of 1.10 pg/ma, The ∑PCBs concentrations and TEQs ranged from 4.23 to 11.35 ng/ma, 0.050 to 0.859 pg（TEQ）/ma, respectively. The concentrations of ∑PBDEs ranged from 92 to 3086 pg/ma, with an average of 894 pg/ma, The pollution levels of PCDD/Fs, PCBs and PBDEs were higher than other urban sites, which may be associated with the E-waste dismantling activities. The PCDD/Fs were found exclusively in the particle phase whereas PCBs distributed dominantly in the gas phase. The gas-partilce partitioning was also assessed by correlating the gas-particle partition coefficient （Kp） with the subcooled liquid vapor pressure （pL^0）. The measured particulate sorptions of PCDD/Fs, PCBs and PBDEs were compared with the predictions from Junge-Pankow model and Koa absorption model. The Junge-Pankow model well estimated the particulate fractions of PCBs. However, it underestimated the sorptions of PCDD/Fs and overestimated the fractions of PBDEs. The predicted particulate fractions of PCDD/Fs and PCBs from Koa model fitted well with the measured data.

关 键 词：中国东南部 空气污染 污染物 多溴化二苯醚 全氟辛烷磺酸 

分 类 号：X831[环境科学与工程—环境工程]