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首页> 外文期刊>Environmental Science & Technology >Inhibition of Biodegradation of Hydraulic Fracturing Compounds by Glutaraldehyde: Groundwater Column and Microcosm Experiments
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Inhibition of Biodegradation of Hydraulic Fracturing Compounds by Glutaraldehyde: Groundwater Column and Microcosm Experiments

机译：戊二醛对水力压裂化合物生物降解的抑制作用：地下水柱和微观实验

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摘要

The rapid expansion of unconventional oil and gas development has raised concerns about the potential contamination of aquifers; however, the groundwater fate and transport of hydraulic fracturing fluid compounds and mixtures remains a significant data gap. Degradation kinetics of five hydraulic fracturing compounds (2-propanol, ethylene glycol, propargyl alcohol, 2-butoxyethanol, and 2-ethylhexanol) in the absence and presence of the biocide glutaraldehyde were investigated under a range of redox conditions using sediment-groundwater microcosms and flow-through columns. Microcosms were used to elucidate biodegradation inhibition at varying glutaraldehyde concentrations. In the absence of glutaraldehyde, half-lives ranged from 13 d to >93 d. Accurate mass spectrometry indicated that a trimer was the dominant aqueous-phase glutaraldehyde species. Microbial inhibition was observed at glutaraldehyde trimer concentrations as low as 5 mg L-1, which demonstrated that the trimer retained some biocidal activity. For most of the compounds, biodegradation rates slowed with increasing glutaraldehyde concentrations. For many of the compounds, degradation was faster in the columns than the microcosms. Four compounds (2-propanol, ethylene glycol, propargyl alcohol, and 2-butoxyethanol) were found to be both mobile and persistent in groundwater under a range of redox conditions. The glutaraldehyde trimer and 2-ethylhexanol were more rapidly degraded, particularly under oxic conditions.
机译：非常规油气开发的迅速扩展引起了人们对含水层潜在污染的担忧。但是，地下水的命运以及水力压裂液化合物和混合物的运输仍然存在巨大的数据缺口。在一定范围的氧化还原条件下，利用沉积物-地下水的微观结构，研究了五种水力压裂化合物（2-丙醇，乙二醇，炔丙醇，2-丁氧基乙醇和2-乙基己醇）在不存在和存在杀生物剂戊二醛的情况下的降解动力学。流通塔。缩影用于阐明戊二醛浓度不同时的生物降解抑制作用。在没有戊二醛的情况下，半衰期为13 d至> 93 d。准确的质谱分析表明三聚体是主要的水相戊二醛种类。在低至5 mg L-1的戊二醛三聚体浓度下观察到微生物抑制作用，这表明三聚体保留了一定的杀生物活性。对于大多数化合物，随着戊二醛浓度的增加，生物降解速度减慢。对于许多化合物而言，在色谱柱中的降解要比微观色谱更快。发现在一定范围的氧化还原条件下，四种化合物（2-丙醇，乙二醇，炔丙醇和2-丁氧基乙醇）在地下水中既可移动又可持久。戊二醛三聚体和2-乙基己醇降解更快，特别是在有氧条件下。

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  • 来源
    《Environmental Science & Technology》 |2017年第17期|10251-10261|共11页
  • 作者

    Jessica D. Rogers; Imma Ferrer; Shantal S. Tummings; Angela R. Bielefeldt; Joseph N. Ryan;

  • 作者单位

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States,Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, Columbus, Ohio 43210, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, Boulder, Colorado 80309, 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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