College of Life and Environmental Science, MinZu University of China, Beijing 100081, China.
Chemosphere. 2011 Jun;84(3):355-60. doi: 10.1016/j.chemosphere.2011.04.002. Epub 2011 May 4.
Air samples in four seasons at one site and tree bark samples from four districts were determined to investigate seasonal variation and regional distribution of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD) in Beijing, China. The total concentrations of PBDEs (∑PBDE) and HBCD (∑HBCD) were in the range of 57-470 and 20-1800 pg m(-3) in the atmosphere, respectively. The ∑PBDE and ∑HBCD concentrations were significantly influenced by the total suspended particulate matter in atmosphere. The total concentrations of PBDEs and HBCD in tree bark samples were in the range of 99-3700 and 26-3400 ng g(-1) lipid weight. It was found that regional distribution of PBDEs and HBCD was related to the function of each district. In addition, the study found that weeping willow bark was an ideal atmospheric PBDEs and HBCD passive sampler. Finally, atmospheric levels of BDE-209 and HBCD at tree bark sampling districts were estimated via applying an established bark/air partitioning model, which had been verified by the measured concentrations in tree bark and atmosphere in Beijing.
在北京，采集了一个地点四个季节的空气样本和四个地区的树木树皮样本，以研究多溴二苯醚（PBDEs）和六溴环十二烷（HBCD）的季节性变化和区域分布。空气中 PBDEs（∑PBDE）和 HBCD（∑HBCD）的总浓度分别为 57-470 和 20-1800 pg m(-3)。∑PBDE 和∑HBCD 浓度明显受大气总悬浮颗粒物的影响。树木树皮样本中 PBDEs 和 HBCD 的总浓度范围分别为 99-3700 和 26-3400 ng g(-1) 脂重。研究发现，PBDEs 和 HBCD 的区域分布与各地区的功能有关。此外，研究发现垂柳树皮是一种理想的大气 PBDEs 和 HBCD 被动采样器。最后，通过应用已建立的树皮/空气分配模型，对树木树皮采样区的大气 BDE-209 和 HBCD 水平进行了估算，该模型已通过在北京测量的树木树皮和大气中的浓度进行了验证。
