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首页> 外文期刊>Environmental Science & Technology >Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China
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Distribution, Elimination, and Rearrangement of Cyclic Volatile Methylsiloxanes in Oil-Contaminated Soil of the Shengli Oilfield, China

机译：胜利油田油污土壤中环状挥发性甲基硅氧烷的分布，消除和重排

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摘要

Cyclic methylsiloxane standards (D4, D5, and D6) and linear methylsiloxanes (L3 through L16) were detected with high total concentrations (from 5.20 × 10~4 to 1.07 × 10~6 ng/g dw) in 18 oil sludge samples collected from the Shengli oilfield during 2008-2013. In 306 soil samples from this oilfield, the mean concentrations (43.4-125 ng/g dw) and the detection frequencies (65-7696) of D4-D6 were 10.9-11.9 and 2.05-2.24 times higher than those in reference soil samples, respectively. The concentrations of total cyclic siloxanes (ΣCyclic) had positive correlations (R~2 = 0.79, p ＜ 0.05) with the total petroleum hydrocarbons concentration (TPH) in soil, indicating that oil production could release cyclic siloxanes to the environment. During 2008-2013, an increasing tendency (mean of 13.4% per annum) of ΣCyclic was found in soil with high TPH (＞5000 mg/kg) but was not found in soil with lower TPH. Elimination experiments showed that petroleum hydrocarbons could reduce the degradation and volatilization rates of D4, D5, and D6 in impacted oilfield soil. The half-lives of D4, D5, and D6 in the opened and capped soil systems with TPH = 400-40000 mg/kg were 1.19-22.2 and 1.03-7.43 times larger than those in common soil (TPH = 80 mg/kg), respectively. Furthermore, the petroleum hydrocarbons could affect the rearrangement-reaction rates of D5 and D6 in soil.
机译：从18个油污样品中检测到高浓度的环甲基硅氧烷标准品（D4，D5和D6）和线性甲基硅氧烷（L3至L16）（从5.20×10〜4到1.07×10〜6 ng / g dw） 2008-2013年的胜利油田。在该油田的306个土壤样品中，D4-D6的平均浓度（43.4-125 ng / g dw）和检测频率（65-7696）分别是参考土壤样品的10.9-11.9和2.05-2.24倍，分别。土壤中总环硅氧烷的浓度（ΣCyclic）与土壤中总石油烃浓度（TPH）呈正相关（R〜2 = 0.79，p ＜0.05），表明石油生产可以将环硅氧烷释放到环境中。在2008-2013年期间，在高TPH（> 5000 mg / kg）的土壤中发现了ΣCyclic的增加趋势（平均每年13.4％），但在TPH较低的土壤中却没有发现。消除实验表明，石油烃可以降低受影响油田土壤中D4，D5和D6的降解和挥发速率。 TPH = 400-40000 mg / kg的开放和封盖土壤系统中D4，D5和D6的半衰期分别是普通土壤（TPH = 80 mg / kg）的1.19-22.2和1.03-7.43倍， 分别。此外，石油烃可能会影响土壤中D5和D6的重排反应速率。

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  • 来源
    《Environmental Science & Technology》 |2015年第19期|11527-11535|共9页
  • 作者

    Yali Shi; Shihe Xu; Lin Xu; Yaqi Cai;

  • 作者单位

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    Health and Environmental Sciences, Dow Corning Corporation, Auburn, Michigan 48686, United States;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;

  • 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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