Wenning R J, Harris M A, Finley B, Paustenbach D J, Bedbury H
ChemRisk, Portland, Maine.
Ecotoxicol Environ Saf. 1993 Feb;25(1):103-25. doi: 10.1006/eesa.1993.1011.
Isomer-specific determinations of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) were performed in 19 surficial sediment samples collected from the lower Passaic River and Newark Bay, New Jersey. Total PCDD and PCDF concentrations ranged from 415 to 23,300 ng/kg (dry wt) and 37 to 8400 ng/kg, respectively. OCDD and OCDF were the predominant congeners in all samples, followed by the hepta-, hexa-, tetra-, and penta-chlorinated compounds. Forty-seven percent (9/19) of the sediment samples contained no detectable levels of 2, 3, 7, 8-TCDD. The concentrations of 2, 3, 7, 8-TCDD and 2, 3, 7, 8-TCDF ranged from nondetect to 510 ng/kg (geometric mean of 5 ng/kg) and from 2.8 to 480 ng/kg (geometric mean of 13 ng/kg), respectively. The composition of PCDD/Fs in sediments was evaluated using chemometric pattern recognition techniques. Principal components analysis and complete linkage:farthest neighbor cluster analysis revealed the presence of at least five distinctive fingerprint patterns in surficial sediments collected from different locations in the Newark Bay estuary. Differences among PCDD/F patterns were attributable to the relative presence or absence of 1, 2, 3, 4, 6, 7, 8-HpCDF and the hepta-, hexa-, and octa-chlorinated congeners. To determine whether the presence of PCDD/Fs in sediments could be associated with a single source, residues in sediments were compared to those found in three soil samples and one sump sediment sample from a former 2, 4, 5-T manufacturing plant. Significant compositional differences were observed between the two data sets. Fingerprint patterns in sediments were dominated by the higher PCDD/F chlorinated congeners and contained significantly lower levels of the tetra-chlorinated congeners, particularly 2, 3, 7, 8-TCDD, than soils from the former 2, 4, 5-T plant. These differences, as well as those observed among surficial sediments from different locations, indicate that there are clearly several different sources of 2, 3, 7, 8-TCDD and other PCDD/Fs to the estuary.
对从新泽西州帕塞伊克河下游和纽瓦克湾采集的19份表层沉积物样本进行了多氯二苯并 - 对 - 二噁英（PCDDs）和二苯并呋喃（PCDFs）的异构体特异性测定。PCDD和PCDF的总浓度范围分别为415至23300 ng/kg（干重）和37至8400 ng/kg。八氯二苯并二噁英（OCDD）和八氯二苯并呋喃（OCDF）是所有样本中的主要同系物，其次是七氯、六氯、四氯和五氯化合物。47%（9/19）的沉积物样本中未检测到2,3,7,8 - 四氯二苯并二噁英（2,3,7,8 - TCDD）。2,3,7,8 - TCDD和2,3,7,8 - 四氯二苯并呋喃（2,3,7,8 - TCDF）的浓度范围分别为未检测到至510 ng/kg（几何平均值为5 ng/kg）和2.8至480 ng/kg（几何平均值为13 ng/kg）。使用化学计量模式识别技术评估了沉积物中PCDD/Fs的组成。主成分分析和完全连锁：最远邻聚类分析表明，在从纽瓦克湾河口不同位置采集的表层沉积物中存在至少五种独特的指纹图谱模式。PCDD/F模式之间的差异归因于1,2,3,4,6,7,8 - 七氯二苯并呋喃（1,2,3,4,6,7,8 - HpCDF）以及七氯、六氯和八氯同系物的相对存在或不存在。为了确定沉积物中PCDD/Fs的存在是否可能与单一来源相关，将沉积物中的残留物与来自一家 former 2,4,5 - T制造工厂的三个土壤样本和一个集水坑沉积物样本中的残留物进行了比较。在两个数据集之间观察到了显著的组成差异。沉积物中的指纹图谱模式以较高氯代的PCDD/F同系物为主，并且与来自former 2,4,5 - T工厂的土壤相比，四氯代同系物的含量显著较低，特别是2,3,7,8 - TCDD。这些差异以及在不同位置的表层沉积物中观察到的差异表明，河口的2,3,7,8 - TCDD和其他PCDD/Fs显然有几个不同的来源。
