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首页> 外文期刊>Journal of Environmental Science and Health >Surfactant-enhanced ozone sparging for removal of organic compounds from sand
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Surfactant-enhanced ozone sparging for removal of organic compounds from sand

机译：表面活性剂增强的臭氧喷射，可去除沙子中的有机物

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摘要

An innovative surfactant-enhanced ozone sparging (SEOS) technique was developed in this study. The synergistic effect of simultaneous surfactant and ozone application on the removal of organic contaminants in an aquifer during air sparging was investigated. Using laboratory-scale one- and two-dimensional physical models packed with water-saturated sand, air sparging and ozone sparging were implemented either at high or low level surface tension of the groundwater. A water-dissolved chemical (fluorescein sodium salt) and a nonaqueous phase liquid (n-decane) were used as the representative contaminants. Sodium dodecylbenzene sulfonate was used for sparging experiments at low level surface tension. Ozone sparging at low surface tension (SEOS) was found to be the most efficient process for the removal of organic chemicals, among AS (air sparging at high surface tension), SEAS (surfactant-enhanced air sparging, air sparging at low surface tension), and OS (ozone sparging at high surface tension), based on the results from a one-dimensional column study. Two-dimensional model experiments also showed that SEOS is more efficient than conventional AS processes. The increased air saturation and sparging influence zone achieved by surfactant application, and the oxidative power of ozone are responsible for the enhanced removal of contaminants from the aquifer. Considering that the application of conventional AS is limited to volatile contaminants, and that OS has a very narrow influence zone, SEOS can be an useful option for the removal of contaminants of low vapor pressures from an expanded zone of influence.
机译：在这项研究中开发了一种创新的表面活性剂增强臭氧喷射（SEOS）技术。研究了同时使用表面活性剂和臭氧对空气喷射过程中去除含水层中有机污染物的协同作用。使用充满水饱和沙子的实验室规模的一维和二维物理模型，在地下水的高或低表面张力下进行了空气喷射和臭氧喷射。使用水溶性化学药品（荧光素钠盐）和非水相液体（正癸烷）作为代表性污染物。十二烷基苯磺酸钠用于低水平表面张力的起泡实验。在AS（高表面张力的空气喷射），SEAS（增强表面活性剂的空气喷射，低表面张力的空气喷射）中，低表面张力的臭氧喷射（SEOS）被发现是去除有机化学品的最有效方法。和OS（高表面张力下的臭氧喷射），基于一维柱研究的结果。二维模型实验还表明，SEOS比常规的AS流程更有效。通过使用表面活性剂可以增加空气饱和度和鼓泡影响区域，以及臭氧的氧化能力有助于提高从含水层中去除污染物的能力。考虑到常规AS的应用仅限于挥发性污染物，并且OS具有非常狭窄的影响区，因此SEOS可能是从扩展影响区中去除低蒸汽压污染物的有用选择。

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  • 来源
    《Journal of Environmental Science and Health》 |2013年第6期|526-533|共8页
  • 作者

    HEONKI KIM; SUKYEONG YANG; HAEWON YANG;

  • 作者单位

    Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do, Korea;

    Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do, Korea;

    Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do, Korea;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Air sparging; ozone; surfactant-enhanced; aquifer; remediation; contamination;

    机译：空气喷射;臭氧;表面活性剂增强含水层补救措施;污染;

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