School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, USA.
Environ Sci Technol. 2011 Oct 15;45(20):8698-706. doi: 10.1021/es2020378. Epub 2011 Sep 26.
Air (vapor and particle) and precipitation samples were collected at five sites (two urban, one rural, and two remote) around the Great Lakes during 2005-2009 as a part of the Integrated Atmospheric Deposition Network (IADN). The concentrations of polybrominated diphenyl ethers (PBDEs), decabromodiphenylethane (DBDPE), hexabromobenzene (HBB), pentabromoethylbenzene (PBEB), and 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE) were measured in these samples. The highest concentrations of these compounds were generally observed at the two urban sites-Chicago and Cleveland-with a few exceptions: The remote site at Eagle Harbor had particularly high levels of PBEB in all three phases, and the rural Sturgeon Point site had the highest HBB concentrations in the vapor phase. The sources of HBB and PBEB to these sites are unknown. A multiple linear regression model was applied to the concentrations of these compounds in the vapor phase, particle phase, precipitation, and the three phases combined. This regression resulted in overall (three phases combined) halving times for total PBDE concentrations of 6.3 ± 1.1 years. The overall halving times for HBB and BTBPE were 9.5 ± 4.6 years and 9.8 ± 2.8 years, respectively. For PBEB and DBDPE, the regression was not statistically significant for the combined phases, indicating that the atmospheric concentrations of these compounds have not changed between 2005 and 2009.
空气（蒸气和粒子）和降水样本于 2005-2009 年期间在大湖周围的五个地点（两个城市、一个农村和两个偏远地区）收集，作为综合大气沉降网络（IADN）的一部分。在这些样本中测量了多溴二苯醚（PBDEs）、十溴二苯乙烷（DBDPE）、六溴苯（HBB）、五溴乙基苯（PBEB）和 1,2-双（2,4,6-三溴苯氧基）乙烷（BTBPE）的浓度。这些化合物的最高浓度通常在两个城市地点（芝加哥和克利夫兰）观察到，也有一些例外：鹰港的偏远地点在所有三个相中都有特别高的 PBEB 水平，而斯图金角的农村地点在蒸气相中则有最高的 HBB 浓度。这些地点的 HBB 和 PBEB 的来源尚不清楚。应用多元线性回归模型对这些化合物在蒸气相、粒子相、降水中的浓度以及三相组合进行了分析。该回归导致所有三个相组合的总 PBDE 浓度的总体半衰期为 6.3±1.1 年。HBB 和 BTBPE 的总体半衰期分别为 9.5±4.6 年和 9.8±2.8 年。对于 PBEB 和 DBDPE，对于三相组合，回归在统计学上不显著，这表明这些化合物的大气浓度在 2005 年至 2009 年间没有变化。
