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首页> 外文期刊>Environmental Science & Technology >A Modified Approach for in Situ Chemical Oxidation Coupled to Biodegradation Enhances Light Nonaqueous Phase Liquid Source-Zone Remediation
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A Modified Approach for in Situ Chemical Oxidation Coupled to Biodegradation Enhances Light Nonaqueous Phase Liquid Source-Zone Remediation

机译：原位化学氧化与生物降解耦合的改进方法可增强轻质非水相液相源区修复

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摘要

Field and batch experiments were conducted to assess whether a modified approach for in situ chemical oxidation (ISCO) (with MgO_2 and Fe_2O_3 particles recovered from acid mine drainage treatment) can enhance LNAPL (light nonaqueous phase liquid) dissolution and produce bioavailable soluble compounds. This modified ISCO approach was coupled to biodegradation to further remove residual compounds by microbially mediated processes. Pure palm biodiesel (B100) was chosen to represent a poorly water-soiuble compound that behaves like LNAPLs, and 100 L was released to a 2 m~2 area excavated down to the water table. A past adjaent B100-field experiment under natural attenuation was conducted as a baseline control. Results demonstrated the enhancement of organic compound dissolution and production of soluble compounds due to the modified in situ chemical oxidation. The slow release of H_2O_2 by MgO_2 decomposition (termed partial diemical oxidation) and production of soluble compounds allowed the stimulation of microbial growth and promoted a beneficial response in microbial communities involved in oxidized biodiesel compound biodegradation. This is the first field experiment to demonstrate that this modified ISCO approach coupled to biodegradation could be a feasible strategy for the removal of poorly water-soluble compounds (e.g., biodiesel) and prevent the long-term effects generally posed in source zones.
机译：进行了现场和批量试验，以评估原位化学氧化（ISCO）的改良方法（从酸性矿山排水处理中回收MgO_2和Fe_2O_3颗粒）是否可以增强LNAPL（轻质非水相液体）溶解并产生可生物利用的可溶性化合物。这种改进的ISCO方法与生物降解相结合，以通过微生物介导的过程进一步去除残留的化合物。选择纯棕榈生物柴油（B100）来代表一种水溶性差的化合物，其行为类似于LNAPL，并且100 L被释放到挖掘到地下水位的2 m〜2区域中。在自然衰减下进行了过去的相邻B100场实验，作为基线对照。结果表明，由于修饰的原位化学氧化作用，有机化合物的溶解和可溶性化合物的产生得以增强。通过MgO_2分解（称为部分二甲基氧化）和可溶化合物的产生，H_2O_2的缓慢释放可以刺激微生物的生长，并促进参与氧化生物柴油化合物生物降解的微生物群落的有益响应。这是第一个现场实验，证明这种改进的ISCO方法与生物降解相结合可能是去除水溶性差的化合物（例如生物柴油）并防止源区普遍产生的长期影响的可行策略。

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  • 来源
    《Environmental Science & Technology》 |2017年第1期|463-472|共10页
  • 作者

    Franciele Fedrizzi; Debora T. Ramos; Helen S. C. Lazzarin; Marilda Fernandes; Catherine Larose; Timothy M. Vogel; and Henry X Corseuil;

  • 作者单位

    Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil;

    Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil;

    Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil;

    Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil;

    Environmental Microbial Genomics, Laboratoire Ampere, CNRS, École Centrale de Lyon, Universite de Lyon, Ecully, France;

    Environmental Microbial Genomics, Laboratoire Ampere, CNRS, École Centrale de Lyon, Universite de Lyon, Ecully, France;

    Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil;

  • 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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