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首页> 外文期刊>Journal of Contaminant Hydrology >Heterogeneous carbonaceous matter in sedimentary rock lithocomponents causes significant trichloroethylene (TCE) sorption in a low organic carbon content aquifer/aquitard system
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Heterogeneous carbonaceous matter in sedimentary rock lithocomponents causes significant trichloroethylene (TCE) sorption in a low organic carbon content aquifer/aquitard system

机译：沉积岩岩石成分中的非均质碳质物质在低有机碳含量的含水层/阿奎塔尔体系中引起大量的三氯乙烯（TCE）吸附

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摘要

This study evaluated the effects of heterogeneous thermally altered carbonaceous matter (CM) on trichloroethylene (TCE) sorption for a low fraction organic carbon content (f_(oc)) alluvial sedimentary aquifer and aquitard system (f_(oc) = 0.046-0.105%). The equilibrium TCE sorption isotherms were highly nonlinear with Freundlich exponents of 0.46-0.58. Kerogen + black carbon was the dominant CM fraction extracted from the sediments and accounted for ＞ 60% and 99% of the total in the sands and silt, respectively. Organic petrological examination determined that the kerogen included abundant amorphous organic matter (bituminite), likely of marine origin. The dark calcareous siltstone exhibited the greatest TCE sorption among aquifer lithocomponents and accounted for most sorption in the aquifer. The results suggest that the source of the thermally altered CM, which causes nonlinear sorption, was derived from parent Paleozoic marine carbonate rocks that outcrop throughout much of New York State. A synthetic aquifer-aquitard unit system (10% aquitard) was used to illustrate the effect of the observed nonlinear sorption on mass storage potential at equilibrium. The calculation showed that ＞80% of TCE mass contained in the aquifer was sorbed on the aquifer sediment at aqueous concentration ＜ 1000 μg L~(-1). These results show that sorption is likely a significant contributor to the persistence of a TCE groundwater plume in the aquifer studied. It is implied that sorption may similarly contribute to TCE persistence in other glacial alluvial aquifers with similar geologic characteristics, i.e., comprised of sedimentary rock lithocomponents that contain thermally altered CM.
机译：这项研究评估了低比例有机碳含量（f_（oc））冲积层和含水层系统（f_（oc）= 0.046-0.105％）的非均质热变碳质（CM）对三氯乙烯（TCE）吸附的影响。平衡的TCE吸附等温线是高度非线性的，弗氏指数为0.46-0.58。干酪根+黑碳是从沉积物中提取的主要CM组分，分别占砂和粉砂总量的＞ 60％和99％。有机岩石学检查确定干酪根中含有丰富的无定形有机物（烟煤），可能是海洋来源。深色钙质粉砂岩在含水层岩石成分中表现出最大的TCE吸附，并在含水层中占最大的吸附。结果表明，引起非线性吸附的热改变的CM的来源是从在纽约州大部分地区露头的古生代海相碳酸盐岩中获得的。合成的含水层－阿奎塔尔单位系统（10％的阿奎尔塔）被用来说明所观察到的非线性吸附对平衡状态下的储藏潜力的影响。计算表明，含水量＜1000μgL〜（-1）时，含水层中TCE质量的＞ 80％被吸附在含水层沉积物上。这些结果表明，吸附可能是研究的含水层中TCE地下水羽流持续存在的重要因素。暗示在具有相似地质特征的其他冰川冲积含水层中，吸附作用可能会类似地促成三氯乙烯的持久性，即由含有热改变的CM的沉积岩岩石成分组成。

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  • 来源
    《Journal of Contaminant Hydrology》 |2014年第10期|23-31|共9页
  • 作者

    Sungwook Choung; Lisa R. Zimmerman; Richelle M. Allen-King; Bertrand Ligouis; Stanley Feenstra;

  • 作者单位

    Department of Geology, University at Buffalo, State University of New York, Buffalo, NY 14260, USA, Division of Earth and Environmental Science Research, Korea Basic Science Institute, Cheongju, 363-883, Republic of Korea;

    Department of Geology, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;

    Department of Geology, University at Buffalo, State University of New York, Buffalo, NY 14260, USA;

    Laboratories for Applied Organic Petrology (LAOP), Institute for Archaeological Sciences, University of Tuebingen, Ruemelinstr. 23, 72070 Tuebingen, Germany;

    Applied Groundwater Research Ltd., Mississauga, Ontario L5M 2H7, Canada;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sorption; Thermally altered carbonaceous matter; Volatile organic compound; Trichloroethylene; Kerogen;

    机译：吸附;热改变的碳质物质;挥发性有机化合物;三氯乙烯;干酪根;

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