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首页> 外文期刊>Environmental Science & Technology >Examining Natural Attenuation and Acute Toxicity of Petroleum-Derived Dissolved Organic Matter with Optical Spectroscopy
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Examining Natural Attenuation and Acute Toxicity of Petroleum-Derived Dissolved Organic Matter with Optical Spectroscopy

机译：用光谱学检查石油衍生的溶解有机物的自然衰减和急性毒性

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摘要

Groundwater samples containing petroleum-derived dissolved organic matter (DOM_(HC)) originating from the north oil body within the National Crude Oil Spill Fate and Natural Attenuation Research Site near Bemidji, MN, USA were analyzed by optical spectroscopic techniques (i.e., absorbance and fluorescence) to assess relationships that can be used to examine natural attenuation and toxicity of DOM_(HC) in contaminated groundwater. A strong correlation between the concentration of dissolved organic carbon (DOC) and absorbance at 254 nm (a _(254)) along a transect of the DOM_(HC) plume indicates that a _(254) can be used to quantitatively assess natural attenuation of DOM_(HC). Fluorescence components, identified by parallel factor (PARAFAC) analysis, show that the composition of the DOM_(HC) beneath and adjacent to the oil body is dominated by aliphatic, low O/C compounds (“protein-like” fluorescence) and that the composition gradually evolves to aromatic, high O/C compounds (“humic-/fulvic-like” fluorescence) as a function of distance downgradient from the oil body. Finally, a direct, positive correlation between optical properties and Microtox acute toxicity assays demonstrates the utility of these combined techniques in assessing the spatial and temporal natural attenuation and toxicity of the DOM_(HC) in petroleum-impacted groundwater systems.
机译：通过光谱技术（即吸光度和吸光度）分析了美国明尼苏达州贝米吉附近国家原油溢漏归宿和自然衰减研究基地北油体中含有石油衍生的溶解有机物（DOM_（HC））的地下水样品。荧光）以评估可用于检查受污染地下水中DOM_（HC）的自然衰减和毒性的关系。沿着DOM_（HC）羽状样线的横断面，溶解有机碳（DOC）的浓度与254 nm处的吸光度之间有很强的相关性（a）（254）表示a（254）可以是用于定量评估DOM_（HC）的自然衰减。通过并行因子（PARAFAC）分析确定的荧光成分表明，油体下方和邻近的DOM_（HC）成分主要由脂肪族低O / C化合物（“类蛋白质”荧光）主导，并且随着距离油体的距离逐渐降低，其组成逐渐演变成芳香的高O / C化合物（“腐殖质/富勒维”荧光）。最后，光学性质和Microtox急性毒性测定之间的直接正相关证明了这些组合技术在评估石油影响的地下水系统中DOM_（HC）的时空自然衰减和毒性方面的实用性。

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  • 来源
    《Environmental Science & Technology》 |2018年第11期|6157-6166|共10页
  • 作者

    David C. Podgorski; Phoebe Zito; Jennifer T. McGuire; Dalma Martinovic-Weigelt; Isabelle M. Cozzarelli; Barbara A. Bekins; Robert G. M. Spencer;

  • 作者单位

    Pontchartrain Institute for Environmental Sciences, Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148, United States;

    Pontchartrain Institute for Environmental Sciences, Department of Chemistry, University of New Orleans, New Orleans, Louisiana 70148, United States;

    Department of Biology, University of St. Thomas, St. Paul, Minnesota 55105, United States;

    Department of Biology, University of St. Thomas, St. Paul, Minnesota 55105, United States;

    U.S. Geological Survey, Reston, Virginia 20192, United States;

    U.S. Geological Survey, Menlo Park, California 94025, United States;

    Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, Florida 32306, 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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