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Crude Oil Metabolites in Groundwater at Two Spill Sites

机译：两个泄漏点的地下水中的原油代谢产物

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摘要

Two groundwater plumes in north central Minnesota with residual crude oil sources have 20 to 50 mg/L of nonvolatile dissolved organic carbon (NVDOC). These values are over 10 times higher than benzene and two to three times higher than Diesel Range Organics in the same wells. On the basis of previous work, most of the NVDOC consists of partial transformation products from the crude oil. Monitoring data from 1988 to 2015 at one of the sites located near Bemidji, MN show that the plume of metabolites is expanding toward a lakeshore located 335m from the source zone. Other mass balance studies of the site have demonstrated that the plume expansion is driven by the combined effect of continued presence of the residual crude oil source and depletion of the electron accepting capacity of solid phase iron oxide and hydroxides on the aquifer sediments. These plumes of metabolites are not covered by regulatory monitoring and reporting requirements in Minnesota and other states. Yet, a review of toxicology studies indicates that polar metabolites of crude oil may pose a risk to aquatic and mammalian species. Together the results suggest that at sites where residual sources are present, monitoring of NVDOC may be warranted to evaluate the fates of plumes of hydrocarbon transformation products.
机译：明尼苏达州中北部的两个地下水柱中残留的原油来源含有20至50 mg / L的非挥发性溶解有机碳（NVDOC）。在同一口井中，这些值比苯高10倍以上，比Diesel Range Organics高2至3倍。在先前的工作基础上，大多数NVDOC均由原油的部分转化产物组成。 1988年至2015年在明尼苏达州贝米吉（Bemidji）附近的一个站点的监测数据显示，代谢物羽流正在向着距源区335m的湖岸扩展。该地点的其他质量平衡研究表明，羽流膨胀是由残余原油源持续存在和含水相沉积物上固相氧化铁和氢氧化物的电子接受能力耗竭的综合作用驱动的。明尼苏达州和其他州的法规监测和报告要求未涵盖这些羽状代谢物。然而，毒理学研究的回顾表明，原油的极性代谢产物可能对水生和哺乳动物物种构成风险。在一起的结果表明，在存在残留源的地点，可能需要对NVDOC进行监测，以评估烃类转化产物羽流的命运。

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  • 来源
    《Ground water》 |2016年第5期|681-691|共11页
  • 作者

    Bekins Barbara A.; Cozzarelli Isabelle M.; Erickson Melinda L.; Steenson Ross A.; Thorn Kevin A.;

  • 作者单位

    US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA;

    US Geol Survey, 12201 Sunrise Valley Dr, Reston, VA 20192 USA;

    US Geol Survey, 2280 Woodale Dr, Mounds View, MN 55112 USA;

    San Francisco Bay Reg Water Qual Control Board, 1515 Clay St, Oakland, CA 94612 USA;

    US Geol Survey, Denver Fed Ctr, MS-408,Bldg 95, Lakewood, CO 80225 USA;

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