Imamoglu I, Li K, Christensen E R
Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, 53211, USA.
Water Sci Technol. 2002;46(3):89-96.
The PCB pollution in Ashtabula River sediments was evaluated using a factor analysis (FA) model with non-negative constraints, and a chemical mass balance (CMB) model. The FA model identified Aroclor 1248 as the major PCB source, and also a congener pattern significantly different from that of any Aroclor. The CMB model that uses linear combinations of Aroclors, failed to reproduce the sample congener profiles with good statistical fit. The findings from both models indicate that the PCBs in Ashtabula River sediments have undergone significant alterations changing their profiles from those of the original sources. These alterations may be explained by the anaerobic dechlorination of highly chlorinated congeners, according to dechlorination activities H/H'.
利用具有非负约束的因子分析（FA）模型和化学质量平衡（CMB）模型，对阿什塔比拉河沉积物中的多氯联苯（PCB）污染进行了评估。FA模型确定Aroclor 1248为主要的多氯联苯来源，并且其同系物模式与任何一种Aroclor的模式都有显著差异。使用Aroclors线性组合的CMB模型，未能以良好的统计拟合度再现样品同系物分布。两个模型的研究结果均表明，阿什塔比拉河沉积物中的多氯联苯已经历了显著变化，其分布与原始来源不同。根据脱氯活性H/H'，这些变化可能是由高氯代同系物的厌氧脱氯作用所导致的。
