| 典型电子垃圾拆解区大气中多溴联苯醚的污染 |
| 摘要点击 2698 全文点击 1776 修订日期：2007-10-24 |
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| 中文关键词 电子垃圾 大气污染 PBDEs 气/固分配 |
| 英文关键词 atmosphere pollution polybrominated diphenyl ethers(PBDEs) gas/particle partitioning |
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| 中文摘要 |
| 分别在典型电子垃圾拆解区(E)和其上风向参考点(S)采集了大气颗粒相和气相样品，以研究该区域大气中PBDEs的浓度水平、污染特征和气/固分布特点.分析过程中运用气相色谱-质谱联用仪，负化学离子源(GC-NCI-MS)检测了11种PBDEs.结果表明，电子垃圾拆解造成了比较严重的PBDEs污染，三溴～十溴联苯醚的浓度范围为51.1～2685 pg·m-3(平均值830 pg·m-3)，而对照区由于制衣行业的影响也造成了一定程度的PBDEs污染，三溴～十溴联苯醚的浓度范围为1.00～98.9 pg·m-3(平均值28.7 pg·m-3).在气/固分布的研究中发现，不同的PBDEs在气相和颗粒相的分布比例相差很大，从低溴至高溴PBDEs在气相中的比例呈降低趋势，而在颗粒相中的比例呈上升趋势.电子垃圾拆解区以五溴-联苯醚污染为主，占∑11PBDEs总量的54.3%；而十溴-联苯醚污染次之，占∑11PBDEs总量的23.8%，该污染特征进一步证实了该地区电子垃圾的来源，不仅来自亚洲国家，而且还来自欧美等国家. |
| 英文摘要 |
| The vapor-phase and particulate-phase samples were collected from the E-waste dismantling region (E) and a reference region (S), which is located in the upwind direction of the E and where the costume industry is developed. The aim was to acquire information about the concentrations, gas/particle partitioning and distribution of polybrominated diphenyt ethers (PBDEs). 11 congeners PBDEs were detected with GC-NCI-MS. The results showed that E-waste dismantling has resulted in serious pollution and the PBDE concentrations (from tri-to deca-BDE) ranged from 51.1 pg·m-3 to 2685 pg·m-3 (mean：830 pg·m-3), while the PBDE concentrations (from tri-to deca-BDE) in S were in the range of 1.00 pg·m-3 to 98.9 pg·m-3 (mean: 28.7 pg·m-3). The gas/particle partitioning of PBDEs exhibited a strong dependence on bromine number. Low-brominated PBDEs tend to have a higher concentration in the gas-phase while highly brominated PBDEs are mostly associated with the particulate. The mass distribution of PBDEs in E (including vapor-phase and particulate-phase) was dominated by penta-BDE, accounting for 54.3% of the total PBDEs, followed by deca-BDE, accounting for 23.8%. This pollution characters validated that the E-waste did not only come from Asia, but also from North America and Europe. |
