Multi-year air monitoring of legacy and current-use brominated flame retardants in an urban center in northeastern China.
Multi-year air monitoring of legacy and current-use brominated flame retardants in an urban center in northeastern China.
复制标题
DOI：
10.1016/j.scitotenv.2016.07.031
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Wen-Long Li;Chunyan Huo;Li-Yan Liu;Wei-Wei Song-Wei;Zi-Feng Zhang;Wanli Ma;Li-Na Qiao;Yi-Fan Li
中科院分区：
文献类型：
--
作者：
Wen-Long Li;Chunyan Huo;Li-Yan Liu;Wei-Wei Song-Wei;Zi-Feng Zhang;Wanli Ma;Li-Na Qiao;Yi-Fan Li
连续6年(2008年-2013年)对东北中国市区大气中多溴联苯醚(PBDEs)和非多溴联苯醚(NBFR)的存在状况和时间趋势进行了研究。在所有化学物质中，苯醚-209、L、2，5，6，9，10-六溴环十二烷和十溴二苯乙烷是最主要的三种化合物。在此期间，气相中的五溴二苯醚和颗粒相中的八溴二苯醚含量显著下降，而气相和颗粒相中的BDE-209和NBFR含量均有所增加。环境温度是影响BFR气相和颗粒相浓度的最显著变量，其次是风速和相对湿度。对于质量较小的BFR，大气浓度对温度的依赖性更强。气固两相分配研究表明，东北中国城市大气中的多溴二苯醚处于稳定状态。稳态方程也能很好地描述NBFR的分配行为，表明NBFR的大气分配行为与PBDEs相似。
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.