| 苏州、无锡和南通道路灰尘中的多溴联苯醚和多氯联苯 |
| 摘要点击 1653 全文点击 1246 投稿时间：2013-01-07 修订日期：2013-02-21 |
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| 中文关键词 城市道路灰尘 多溴联苯醚 多氯联苯 苏州 无锡 南通 |
| 英文关键词 road dust PBDEs PCBs Suzhou Wuxi Nantong |
| 作者 | 单位 | E-mail | | 史双昕 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | shishuangxin2001@163.com | | 董亮 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | | | 李玲玲 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | | | 张辉 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | | | 李斯明 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | | | 张天野 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | | | 黄业茹 | 国家环境分析测试中心, 国家环境保护二(口恶)英污染控制重点实验室, 北京 100029 | yrhuang@cneac.com |
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| 中文摘要 |
| 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∑8PBDEs含量范围为 4.21~1471 μg·kg-1, ∑32PCBs含量范围为 ND~14.1 μg·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 ∑8PBDEs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. |
| 英文摘要 |
| Fifty-eight urban road dust samples were collected in June of 2009 from Suzhou, Wuxi and Nantong, South Jiangsu Province. Eight polybrominated diphenyl ether (PBDE) congeners and thirty-two polychlorinated biphenyl (PCB) congeners were measured using the gas chromatography-mass spectrometry. Concentrations of ∑8PBDEs and ∑32PCBs ranged from 4.21 to 1471 μg·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 ∑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 product and other environmental matrix. |
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