School of Public Health, University of Illinois at Chicago, Chicago, Illinois 60612, USA.
Environ Sci Technol. 2011 Jun 15;45(12):5156-63. doi: 10.1021/es201019m. Epub 2011 May 26.
Dechlorane (mirex), Dechlorane Plus (DP), Dechlorane 602 (Dec602), Dechlorane 603 (Dec603), Dechlorane 604 (Dec604), and Chlordecone (Kepone) were analyzed in 16 sediment cores collected in 2007 from the Great Lakes of North America. Results show that Lake Ontario sediments have accumulated mirex, DP, Dec602 and Dec604 in amounts 1 to 2 orders of magnitude higher than other Great Lakes. The chemical inventory decreases log-linearly with increasing latitude (N) and longitude (W) of the sampling locations, but Lake Ontario sites are outliers in the regression against latitude. The regression analyses suggest differences among the analytes with regard to source impact and long-range transport behavior. Temporal trends of input differ among lakes. Most sites in Lake Superior are still receiving increasing fluxes of DP and Dec602, while these have been declining in Lake Ontario from the peak around 1990. The relative abundance of the two DP isomers, represented by f(syn), increases with increasing distance from the potential discharge source in Niagara Falls, NY, suggesting the anti-DP isomer is more vulnerable to degradation during long-range atmospheric transport. Kepone was not detected in the sediments of Lakes Ontario, Erie, and Michigan.
在 2007 年采集的 16 个北美五大湖沉积物核心中分析了十氯酮（灭蚁灵）、十氯酮加合物（DP）、六氯代环戊二烯 602（Dec602）、六氯代环戊二烯 603（Dec603）、六氯代环戊二烯 604（Dec604）和氯丹（Kepone）。结果表明，安大略湖沉积物中积累的灭蚁灵、DP、Dec602 和 Dec604 的含量比其他大湖高 1 到 2 个数量级。化学物质的库存随采样地点的纬度（N）和经度（W）呈对数线性减少，但安大略湖的地点在与纬度的回归中是异常值。回归分析表明，分析物在来源影响和长距离传输行为方面存在差异。输入的时间趋势在不同的湖泊中有所不同。苏必利尔湖的大多数地点仍在接收 DP 和 Dec602 的增加通量，而安大略湖的这些通量从 1990 年左右的峰值开始下降。在尼亚加拉瀑布（NY）的潜在排放源的距离增加的情况下，两种 DP 异构体的相对丰度（以 f(syn) 表示）增加，这表明反 DP 异构体在长距离大气传输过程中更容易降解。在安大略湖、伊利湖和密歇根湖的沉积物中未检测到氯丹。
