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Physical Modeling of Air Flow During Air Sparging Remediation

机译：空气喷射修复过程中气流的物理建模

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摘要

Air sparging (AS) is one of the most efficient techniques for remediating saturated soils and groundwater contaminated with volatile organic compounds. A series of physical modeling tests for different sizes of porous media under varied injection pressure were conducted to investigate the effect of particle size and air injection pressure on size and shape of the zone of influence (ZOI). The test results show that ZOI can be expressed by two components: the horizontal expansion due to pneumatic fracture or preferential intrusion around the injection point and the angle of ZOI which is the angle between the vertical line and the boundary of ZOI. There exists a limited angle of ZOI for each type of porous media. The measured minimum and maximum air injection pressures in 1 gtests are compared with corresponding theoretical values, and it is found that the measured minimum injection pressure is slightly lower than the theoretical value, while the measured maximum injection pressure is much higher than the theoretical maximum injection pressure. Centrifugal test results confirmed nonapplicability of theoretical maximum injection pressure to air sparging design. All of the above provide valuable information for design and theoretical modeling of air sparging for groundwater remediation.
机译：空气喷射（AS）是修复饱和土壤和被挥发性有机化合物污染的地下水的最有效技术之一。在不同的注入压力下，针对不同尺寸的多孔介质进行了一系列物理建模测试，以研究粒径和空气注入压力对影响区（ZOI）的尺寸和形状的影响。测试结果表明，ZOI可以由两个分量表示：在注入点周围由于气动断裂或优先侵入而引起的水平膨胀，以及ZOI的角度（即垂直线与ZOI边界之间的角度）。每种类型的多孔介质的ZOI角度均有限。将在1 gtest中测得的最小和最大空气喷射压力与相应的理论值进行比较，发现测得的最小喷射压力略低于理论值，而测得的最大喷射压力远高于理论最大喷射压力。离心测试结果证实理论最大喷射压力不适用于空气喷射设计。以上所有内容为用于地下水修复的空气喷射的设计和理论建模提供了有价值的信息。

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  • 来源
    《Environmental Science & Technology》 |2010年第10期|P.3883-3888|共6页
  • 作者

    LIMING HU; XIAOFENG WU; VAN LIU; JAY N. MEEGODA; SHENGYAN GAO;

  • 作者单位

    Slate Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;

    rnSlate Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;

    rnSlate Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;

    rnDepartment of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, New Jersey;

    rnDepartment of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark, New Jersey;

  • 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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  • 正文语种 eng
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