Elevated levels of polychlorinated dibenzo‐p‐dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and other contaminants have been reported in lower Passaic River, New Jersey, USA, sediments since the 1980s. Nearly 8000 surficial and buried sediment samples have been collected along the 17 miles (27.4 km) of river and analyzed for various contaminants, including the seventeen 2,3,7,8‐substituted PCDD/F congeners. Principal component analysis and hierarchical cluster analysis reveal spatial heterogeneity in the distribution of dioxin congeners, with respect to both sediment depth and river mile. Polytopic vector analysis resolved 11 unique 2,3,7,8‐substituted dioxin congener profiles in the river sediment. The profiles were consistent with multiple dioxin source types, including manufacture of certain dyes and pigments, chlorinated industrial chemicals, hexachlorophene, polychlorinated biphenyls, waste disposal and incineration, the production and use of 2,4,5‐trichorophenol (2,4,5‐TCP), and other industrial processes. The distribution of dioxin profiles in surface and buried river sediments is indicative of multiple inputs of 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin (2,3,7,8‐TCDD) and other dioxins at different locations along the lower Passaic River. These findings are inconsistent with historical claims that a former herbicide manufacturing plant in the lower reach of the river is the only significant 2,3,7,8‐TCDD source and consistent with evidence of several different inputs associated with the production, use, and/or disposal of 2,4,5‐TCP at several locations along the lower Passaic River. Environ Toxicol Chem 2021;40:1499–1519. © 2020 SETAC

中文翻译：

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新泽西州下帕赛克河沉积物中 2,3,7,8-四氯二苯并对二恶英和其他二恶英的来源

多氯二苯对苯的含量升高自 1980 年代以来，美国新泽西州帕赛克河下游的沉积物中已经报告了二恶英 (PCDD)、多氯二苯并呋喃 (PCDF) 和其他污染物。沿 17 英里（27.4 公里）的河流收集了近 8000 个地表和埋藏沉积物样本，并分析了各种污染物，包括 17 种 2,3,7,8 取代的 PCDD/F 同系物。主成分分析和层次聚类分析揭示了二恶英同系物分布的空间异质性，涉及沉积物深度和河里。多主题矢量分析解决了河流沉积物中 11 种独特的 2,3,7,8 取代的二恶英同系物谱。这些概况与多种二恶英来源类型一致，包括某些染料和颜料的制造、氯化工业化学品、六氯苯、多氯联苯、废物处理和焚烧、2,4,5-三氯苯酚 (2,4,5-TCP) 的生产和使用，以及其他工业过程。表层和埋藏河流沉积物中二恶英剖面的分布表明 2,3,7,8-四氯二苯-p-二恶英 (2,3,7,8-TCDD) 和其他二恶英在沿河下游不同位置。这些发现与历史上的说法不一致，即河流下游的一家前除草剂制造厂是唯一重要的 2,3,7,8-TCDD 来源，并且与与生产、使用和生产相关的几种不同投入的证据一致。 / 或在 Passaic 河下游的几个地点处置 2,4,5-TCP。环境毒理学化学2021；40：1499-1519。© 2020 SETAC