International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; School of Environmental Science, Liaoning University, Shenyang 110036, China.
Sci Total Environ. 2016 Nov 15;571:633-42. doi: 10.1016/j.scitotenv.2016.07.031. Epub 2016 Jul 9.
The occurrence and temporal trends of polybrominated diphenyl ethers (PBDEs) and non-PBDE brominated flame retardants (NBFRs) were investigated in an urban atmosphere of Northeast China in consecutive six years (2008-2013). Among all chemicals, BDE-209, l,2,5,6,9,10-hexabromocyclododecane (HBCD), and decabromodiphenylethane (DBDPE) were the three most dominant compounds. During the period, the levels of pentabromodiphenyl ethers in the gas-phase and octabromodiphenyl ethers in the particle-phase significantly decreased, while the levels of BDE-209 and NBFRs increased in either the gas-phase or particle-phase. Ambient temperature was the most significant variable that influenced the gas-phase and particle-phase concentrations of BFRs, followed by wind speed and relative humidity. A stronger temperature dependence of the atmospheric concentrations was found for lower mass BFRs. Gas-particle partitioning studies suggested PBDEs in the urban atmosphere of Northeast China were at steady-state. Steady-state equation can also well describe the partitioning behavior for NBFRs, suggesting that the atmospheric partitioning behaviors of NBFRs were similar to those of PBDEs.
本研究连续六年（2008-2013 年）调查了中国东北地区城市大气中多溴二苯醚（PBDEs）和非 PBDE 溴系阻燃剂（NBFRs）的发生情况和时间趋势。在所研究的所有化学品中，BDE-209、l,2,5,6,9,10-六溴环十二烷（HBCD）和十溴二苯乙烷（DBDPE）是三种最主要的化合物。在此期间，气相中的五溴二苯醚和颗粒相中的八溴二苯醚的浓度显著降低，而 BDE-209 和 NBFRs 的浓度在气相或颗粒相中均有增加。环境温度是影响 BFRs 气相和颗粒相浓度的最显著变量，其次是风速和相对湿度。对于低分子量的 BFRs，发现大气浓度对温度的依赖性更强。气粒分配研究表明，中国东北地区城市大气中的 PBDEs 处于稳定状态。稳态方程也能很好地描述 NBFRs 的分配行为，表明 NBFRs 的大气分配行为与 PBDEs 相似。
