苏州、无锡和南通道路灰尘中的多溴联苯醚和多氯联苯  

Polybrominated Diphenyl Ethers and Polychlorinated Biphenyls in Road Dust from Suzhou,Wuxi and Nantong

作　　者：史双昕[1] 董亮[1] 李玲玲[1] 张辉[1] 李斯明[1] 张天野[1] 黄业茹[1] 

机构地区：[1]国家环境分析测试中心,国家环境保护二噁英污染控制重点实验室,北京100029

出　　处：《环境科学》2013年第10期4024-4030,共7页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2009CB42160X);环境保护公益性行业科研专项(20100902601)

摘　　要：2009年7月在江苏省南部城市苏州、无锡和南通采集了58个城市道路灰尘样品,使用气相色谱质谱法测定了样品中的8种多溴联苯醚(PBDEs)和32种多氯联苯(PCBs).结果表明,样品中Σ8PBDEs含量范围为4.21~1 471μg·kg-1,Σ32PCBs含量范围为ND^14.1μg·kg-1,PBDEs的含量远远高于PCBs.和其他地区城市土壤样品比较,城市道路灰尘中的PBDEs含量较高,来自燃料燃烧过程和汽车尾气产生的PBDEs不容忽视.城市工业区和中心区样品中PBDEs和PCBs的含量水平没有显著性差异,而高于景观区.研究发现,在城市工业区存在PCBs非故意排放源.PBDEs同族体单体相对含量分析表明,BDE209是样品中检测出的最主要的PBDEs单体,占Σ8PBDEs含量的96.7%(64.1%~99.8%).样品中的PCBs同族体主要为四氯代PCBs和六氯代PCBs,道路灰尘中PCBs同族体的分布模式与PCBs产品和其他环境介质存在一定差异.Fifty-eight urban road dust samples were collected in June of 2009 from Suzhou, Wuxi and Nantong, South Jiangsu Province. Eight polybrominated dipheuyl ether （PBDE） congeners and thirty-two polychlorinated biphenyl （PCB） congeners were measured using the gas chromatography-mass spectrometry. Concentrations of ∑8, sPBDEs and ∑12PCBs ranged from 4. 21 to 1 471μg.kg-1 and ND was 14. 1 μg.kg-1 in the road dust samples, respectively. On the average, levels of PBDEs were much higher than PCBs in samples. Compared with the levels of PBDEs and PCBs in urban soil samples, results indicated that PBDEs levels observed in road dust samples were much higher than urban soil samples collected from other cities. Road dust PBDEs from combustion sources and vehicle emission should be attracted concerns. No significant difference was found between the levels of PBDEs or PCBs in the industrial areas and the urban center area, but was higher than landscape area. The results showed that there were exited unintentional emissions of PCBs in industrial areas. Investigation of compositional pattern of PBDEs indicated that BDE209 was the predominant congener in all samples, contributed 96.7% （64. 1% -99.8% ） of Z 8PBDEs The dominant congeners in the ∑ 32PCBs were tetra- PCBs and hexa-PCBs. The compositional pattern of PCBs congeners found in the road dust was not consistent with that of the commercial PCBs nroduct and other environmental matrix.

关 键 词：城市道路灰尘 多溴联苯醚 多氯联苯 苏州 无锡 南通 

分 类 号：X131[环境科学与工程—环境科学] X508