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Polar Compounds from the Dissolution of Weathered Diesel

机译:溶解风化柴油中的极性化合物

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摘要

Hydrocarbon and nonhydrocarbon components dissolving in water from fresh diesel and field samples of highly weathered diesel (spilled up to 50 years ago) from two sites were investigated. The fresh and weathered diesels were equilibrated with water using a slow-stirring method, and the product and equilibrated aqueous water samples analyzed by a range of analytical procedures. The water phase equilibrated with weathered diesels had higher total dissolved organics concentrations (96 and 8.6 mg/L at the two sites) compared to the water phase equilibrated with fresh diesel (average of 3.4 mg/L). Compound class characterization of dissolved organics in water from the weathered diesel showed that polar components were a significant compound class (98% and 42% at the two sites) and appeared largely as an unresolved complex mixture (UCM) in the total ion chromatograms (TICs). Identification of 1-adamantanol in the polar fraction of both weathered diesel samples (3.6 and 0.3 μg/L at the two sites) suggested that at least some of the associated polar components are from a petroleum source. The analysis of total petroleum hydrocarbons (TPH) is aimed at measuring only dissolved carbon- and hydrogen-containing compounds, and dissolved polar compounds present as a UCM are often assumed to be from natural organic matter (NOM) and removed. This may result in a gross underestimation of the total soluble organic material in water associated with weathered diesels. In addition, the risk posed by these fuel-derived polar compounds is unknown.
机译:研究了从两个地点的新鲜柴油中溶解的水中的碳氢化合物和非碳氢化合物成分以及高风化柴油(可追溯到50年前)的现场样本。使用慢速搅拌方法将新鲜和风化的柴油与水进行平衡,并通过一系列分析程序对产品和平衡的水样品进行分析。与用新鲜柴油平衡的水相(平均值为3.4 mg / L)相比,用风化柴油平衡的水相具有较高的总溶解有机物浓度(两个位置分别为96和8.6 mg / L)。风化柴油中水中溶解的有机物的化合物类别表征表明,极性组分是重要的化合物类别(两个位置分别为98%和42%),并且在总离子色谱图(TICs)中主要作为未解析的复杂混合物(UCM)出现)。在两个风化柴油样品的极性组分中(两个位置分别为3.6和0.3μg/ L)鉴定出1-金刚烷醇表明,至少一些相关的极性组分来自石油。总石油烃(TPH)的分析旨在仅测量溶解的含碳和氢的化合物,并且通常假定以UCM形式存在的溶解的极性化合物来自天然有机物(NOM)并将其除去。这可能导致与风化柴油相关的水中总可溶性有机物质的总估量被低估。此外,由这些燃料衍生的极性化合物构成的危险是未知的。

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  • 来源
    《Ground Water Monitoring & Remediation》 |2009年第4期|85-93|共9页
  • 作者单位

    CSIRO Land and Water, Private Bag No. 5, PO Wembley, WA 6913 and Department of Applied Chemistry, Curtin University of Technology, P.O. Box U1987, Perth, WA 6845, Australia;

    CSIRO Land and Water, Private Bag No. 5, PO Wembley, WA 6913, Australia;

    Chevron Energy Technology Pty Ltd, GPO Box S1580, 250 St Georges Tce, Perth, WA 6000, Australia;

    ENV. Australia Pty Ltd, Box 7480 Cloisters Square, Perth WA 6850;

    CSIRO Land and Water, Private Bag No. 5, PO Wembley, WA 6913, Australia and School of Earth and Environment, The University of Western Australia, 35 Stirling Hwy, Crawley, , WA 6009, Australia;

    CSIRO Land and Water, Private Bag No. 5, PO Wembley, WA 6913, Australia School of Earth and Environment, The University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia;

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