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首页> 外文期刊>Environmental Science & Technology >Role of Black Carbon in the Sorption of Polychlorinated Dibenzo- p-dioxins and Dibenzofurans at the Diamond Alkali Superfund Site, Newark Bay, New Jersey
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Role of Black Carbon in the Sorption of Polychlorinated Dibenzo- p-dioxins and Dibenzofurans at the Diamond Alkali Superfund Site, Newark Bay, New Jersey

机译：炭黑在新泽西州纽瓦克湾钻石碱超级基金站点中对多氯二苯并二恶英和二苯并呋喃的吸附中的作用

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摘要

The sorption of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) to organic carbon (OC) and black carbon (BC) was measured in two sediment cores taken near the Diamond Alkali superfund site (DA) in the Passaic River and Newark Bay, New Jersey (U.SA). An OC partitioning model and a BC-indusive, Freundlich distribution model were used to interpret measurements of freely dissolved PCDD/Fs using passive samplers in sediment incubations, together with measured sedimentary concentrations of OC, BC, and PCDD/Fs. Samples were also analyzed for polycydic aromatic hydrocarbons (PAHs) as controls on the two distribution models. The OC partitioning model underpredicted the distribution of PAHs and PCDD/Fs by 10-100-fold. The Freundlich model predicted the distribution of PAHs at the DA to within a factor of 2-3 of observations. Black carbon-water partition coefficients (K,bc) for PCDD/Fs, derived from literature results of both field and laboratory studies differed up to 1000-fold from values derived from this study. Contrary to expectations, PCDDs displayed stronger sorption than either PCDFs or PAHs relative to their subcooled liquid aqueous solubilities. Even though the presence of BC in the sediments reduced the overall bioavailability of PCDD/Fs by >90%, the sediments at 2 m depth continue to display the highest pore water activities of PCDD/Fs.
机译：在Passaic河和Newark的Diamond Alkali超级基金场址（DA）附近采集的两个沉积岩心中，测量了多氯二苯并对二恶英和二苯并呋喃（PCDD / Fs）对有机碳（OC）和黑碳（BC）的吸附。新泽西州贝（美国）。 OC分配模型和BC含混的Freundlich分布模型用于在沉积物培养中使用被动采样器解释自由溶解的PCDD / F的测量值，以及OC，BC和PCDD / Fs的沉积物浓度。还对样品的多环芳烃（PAH）进行了分析，以作为两种分布模型的对照。 OC分区模型低估了PAH和PCDD / F的分布10-100倍。 Freundlich模型预测DA处PAHs的分布在观测值的2-3倍之内。从田间和实验室研究的文献结果得出的PCDD / Fs的黑碳-水分配系数（K，bc）与本研究得出的值相差最多1000倍。与预期相反，相对于过冷的液态水溶解度，PCDDs的吸附性强于PCDFs或PAHs。即使沉积物中BC的存在将PCDD / Fs的总体生物利用度降低了90％以上，但在2 m深度的沉积物中仍显示出PCDD / Fs最高的孔隙水活度。

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  • 来源
    《Environmental Science & Technology》 |2011年第10期|p.4331-4338|共8页
  • 作者

    Matthew K. Lambert; Carey Friedman; Pamela Luey; Rainer Lohmann;

  • 作者单位

    Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, Rhode Island 02882, United States;

    Massachusetts Institute of Technology, Center for Global Change Science, 54-1810,77 Massachusetts Avenue, Cambridge, MA 02139,United States;

    Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, Rhode Island 02882, United States;

    Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, Rhode Island 02882, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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