北京市春季大气中的多溴联苯醚

ATMOSPHERIC CONCENTRATIONS OF POLYBROMINATED DIPHENYLETHERS(PBDEs) IN THE SPRING OF BEIJING

本研究测定了北京市春季大气中7种多溴联苯醚(PBDEs)同族体的浓度(BDE-28,BDE-47,BDE-99,BDE-153,BDE-183,BDE-206,BDE-209),PBDEs总含量(∑7PBDEs)范围为31—1049pg.m-3,与世界其它城市大气中PBDEs的水平相当.研究发现BDE-47的气粒分配比与温度呈显著正相关,相关系数r=0.860(α=0.01);大气中BDE-206和BDE-209的浓度分别与大气总悬浮颗粒物的浓度呈显著正相关(除风沙期间大气样品外),相关系数为r=0.762(α=0.05),r=0.869(α=0.05).研究表明气象条件会影响北京春季大气中PBDEs的水平和分布.

Atmospheric concentrations of 7 PBDEs congeners （BDE-28, BDE-47, BDE-99, BDE-153, BDE- 183, BDE-206, BDE-209） were determined in the spring of Beijing. The total PBDEs （Σ7PBDEs） concentrations ranged from 31 to 1049 pg ·m^-3, the level was similar to that of other cities in the world. In this study, a significant correlation existed between gas/particle partitioning-ratios of BDE-47 and temperature with correlation coefficient r = 0. 860 （a = 0. 01 ） ; the significant correlations existed between the concentrations of BDE-206, BDE-209 and the TSP concentration in the atmosphere （except the sample in sandstorm weather） with the correlation coefficient r = 0. 762 （ a = 0.05 ） and r = 0. 869 （ α= 0. 05 ） respectively. The study indicated the atmospheric concentration and distribution of PBDEs in the spring of Beijing were impacted by weather.