Song Wenlu, Ford Justin C, Li An, Sturchio Neil C, Rockne Karl J, Buckley Dave R, Mills William J
School of Public Health, Department of Earth and Environmental Sciences, University of Illinois at Chicago, 2121 West Taylor Street, Chicago, Illinois 60612, USA.
Environ Sci Technol. 2005 Aug 1;39(15):5600-5. doi: 10.1021/es050631z.
Sediment cores were taken in 2002 in Lakes Ontario and Erie at four locations. A total of 48 sediment samples were characterized, dated using 210Pb, and analyzed for 10 congeners of polybrominated diphenyl ethers (PBDEs) including BDE209 as well as 39 congeners of polychlorinated biphenyls (PCBs). The surficial concentrations of nine tri- through hepta-BDE congeners (sigma9PBDE) are 4.85 and 6.33 ng g(-1), at sampling sites ON40 and ON30 in Lake Ontario, and 1.83 and 1.95 ng g(-1) at ER37 and ER09 in Lake Erie, respectively, based on dry sediment weight. The surficial BDE209 concentrations are 242 and 211 ng g(-1) at ON40 and ON30 and 50 and 55 ng g(-1) at ER37 and ER09. The sigma(9-) PBDEs fluxes to the sediment around 2002 are 147 and 195 pg cm(-2) year(-1) at ON40 and ON30 and 136 and 314 pg cm(-2) year(-1) at ER37 and ER09, respectively. The fluxes of BDE209 are 6.5 and 7.3 ng cm(-2) year(-1) at ON30 and ON40 and 3.7 and 8.9 ng cm(-2) year(-1) at ER37 and ER09, respectively. Dramatic increases in PBDE concentrations and fluxes upward toward the sediment surface and the present time are evident at both locations in Lake Ontario, while PCBs concentrations peak in the middle of sediment cores around the dated time of 1970s and 1960s. For both locations of Lake Erie, the increasing trends of both PBDEs and PCBs from the bottom to the surficial segments were distorted by sediment mixing. BDE209 is the most abundant congener among PBDEs in the sediments, constituting about 96 and 91% of the total PBDEs on mass basis in Lakes Ontario and Erie, respectively.
2002年，在安大略湖和伊利湖的四个地点采集了沉积物岩芯。共对48个沉积物样本进行了特征描述，使用210Pb进行年代测定，并分析了包括BDE209在内的10种多溴二苯醚（PBDEs）同系物以及39种多氯联苯（PCBs）同系物。基于干沉积物重量，在安大略湖的采样点ON40和ON30，九种三至七溴二苯醚同系物（sigma9PBDE）的表层浓度分别为4.85和6.33 ng g(-1)，在伊利湖的ER37和ER09分别为1.83和1.95 ng g(-1)。BDE209的表层浓度在ON40和ON30分别为242和211 ng g(-1)，在ER37和ER09分别为50和55 ng g(-1)。2002年前后，sigma(9-) PBDEs向沉积物的通量在ON40和ON30分别为147和195 pg cm(-2) year(-1)，在ER37和ER09分别为136和314 pg cm(-2) year(-1)。BDE209的通量在ON30和ON40分别为6.5和7.3 ng cm(-2) year(-1)，在ER37和ER09分别为3.7和8.9 ng cm(-2) year(-1)。在安大略湖的两个地点，PBDE浓度和通量朝着沉积物表面和当前时间向上急剧增加，而PCBs浓度在20世纪70年代和60年代的年代测定时间附近的沉积物岩芯中部达到峰值。对于伊利湖的两个地点，沉积物混合使PBDEs和PCBs从底部到表层段的增加趋势都发生了扭曲。BDE209是沉积物中PBDEs中含量最高的同系物，在安大略湖和伊利湖的沉积物中，分别占PBDEs总量的约96%和91%（按质量计）。
