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首页> 外文期刊>International Journal of Environmental Research and Public Health >Characterization and Source Identification of Polybrominated Diphenyl Ethers (PBDEs) in Air in Xi’an: Based on a Five-Year Study
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Characterization and Source Identification of Polybrominated Diphenyl Ethers (PBDEs) in Air in Xi’an: Based on a Five-Year Study

机译：西安空气中多溴联苯醚（PBDEs）的表征和来源鉴定：基于五年研究

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In order to assess polybrominated diphenyl ether (PBDE) atmospheric pollution levels in Xi’an, air samples were collected using a large flow air sampler from July 2008 to April 2013. In total, 134 samples were collected and 12 PBDE congeners were detected. Total PBDE concentrations (both gaseous and particulate phase) were 36.38–1054 pg/m 3 , with an average of 253.2 ± 198.4 pg/m 3 . BDE-209 was identified as the main PBDE component, with a corresponding concentration of 0.00–1041 pg/m 3 , accounting for 89.4% of total PBDEs. Principal component analysis results showed that PBDEs in Xi’an’s atmosphere mainly originated from commercial products containing penta-BDE, octa-BDE, and deca-BDE. The relative natural logarithm for partial pressure (RP) of PBDEs (gaseous phase) was calculated using the Clausius–Clapeyron equation. The gas flow trajectories at high, middle, and low RP values were analyzed by applying the backward trajectory model. These data indicated that the difference between trajectory distribution and concentration load on trajectories was huge under different RP values. PBDE concentrations (gaseous phase) weighted trajectory showed that the central and southwestern parts of Henan Province and the northwestern area of Hubei Province exhibited the darkest colors, and the daily average concentration contribution of PBDEs to the receiving point was 9 pg/m 3 , which indicates that these areas might be the main potential source areas of PBDEs in Xi’an’s atmosphere.
机译：为了评估西安市的多溴二苯醚（PBDE）大气污染水平，从2008年7月至2013年4月使用大流量空气采样器收集了空气样本。总共收集了134个样本，并检测到12个PBDE同源物。 PBDE的总浓度（气相和颗粒相）为36.38–1054 pg / m 3，平均为253.2±198.4 pg / m 3。 BDE-209被确定为多溴二苯醚的主要成分，其浓度为0.00–1041 pg / m 3，占多溴二苯醚总量的89.4％。主成分分析结果表明，西安大气中的多溴二苯醚主要来自含有五溴联苯醚，八溴联苯醚和十溴联苯醚的商业产品。使用Clausius–Clapeyron方程计算了PBDEs（气相）的分压（RP）的相对自然对数。通过应用后向轨迹模型分析了高，中和低RP值下的气流轨迹。这些数据表明，在不同的RP值下，轨迹分布和轨迹上的集中载荷之间的差异很大。 PBDE浓度（气相）加权轨迹表明，河南省中部和西南部以及湖北省西北部地区呈现最暗的颜色，PBDEs对接收点的日平均浓度贡献> 9 pg / m 3，这表明这些区域可能是西安大气中多溴二苯醚的主要潜在来源区域。

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