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首页> 外文期刊>Journal of Hazardous Materials >Characterization of mass transfer of lower chlorinated benzenes from contaminated sediment into water
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Characterization of mass transfer of lower chlorinated benzenes from contaminated sediment into water

机译：低级氯苯从受污染沉积物中传质到水中的传质特性

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摘要

Mass transport of chlorinated benzenes as found at the Petro-Processors of Louisiana, Inc. (PPI)Superfund site was characterized for a range of flow rates in small streams. At this site hazardous waste was historically disposed of in unengineered pits. Hexachlorobenzene and lesser chlorinated degradation products were found among other compounds. As waste was being disposed into unengineered pits, it seeped to lagoons and sediments of Baton Rouge Bayou (BRB), which flows through and nearby the former disposal areas. Characterization of the transport and fate of chlorobenzenes at PPI is an integral part of the Monitored Natural Attenuation (MNA) remedy currently underway. Laboratory experimental results and mathematical model predictions of the flux of 1,3-dichlorobenzene (1,3-DCB) from sediments into water are presented. 1,3-DCB was studied as individually and as part of a mixture of four contaminants with 1,2-DCB, chlorobenzene (MCB) and trichlorobenzene (TCB). Surficial sediments were collected, spiked with contaminants and leached to determine flux over time. Two advection-dispersion models were tested and the effect of low, cycling and fast stream flow on the contaminant flux was assessed. Model results suggest that tortuosity and effective diffusivity are related effective system predictors and descriptors. Statistical analysis supports the models' predictive capabilities.
机译：在路易斯安那州石油加工公司（PPI）的超级基金站点中发现的氯苯的大量运输具有小流量范围内的各种流量。过去，在该地点，危险废物是在未经工程的坑中处置的。在其他化合物中发现了六氯苯和较少的氯化降解产物。由于废物被丢弃到未经工程处理的坑中，因此渗入了Baton Rouge Bayou（BRB）的泻湖和沉积物中，这些废物流经并靠近先前的处置区。在PPI上表征氯苯的运输和命运是目前正在进行的监测自然衰减（MNA）补救措施的组成部分。给出了1,3-二氯苯（1,3-DCB）从沉积物到水中通量的实验室实验结果和数学模型预测。 1,3-DCB被单独研究，并且作为四种污染物与1,2-DCB，氯苯（MCB）和三氯苯（TCB）的混合物的一部分进行研究。收集表面沉积物，掺入污染物，并进行淋滤以确定随时间推移的通量。测试了两个对流扩散模型，并评估了低流量，循环流量和快速流量对污染物通量的影响。模型结果表明，曲折度和有效扩散率是相关的有效系统预测器和描述符。统计分析支持模型的预测能力。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.109-117|共9页
  • 作者

    Marti C. Blad; M. Teresa Gutierrez-Wing; W. David Constant;

  • 作者单位

    Louisiana State University, Department of Civil and Environmental Engineering, 3418 Patrick F. Taylor Hall, Baton Rouge, LA 70803, United States;

    Louisiana State University, Department of Civil and Environmental Engineering, 116 Engineering Lab Annex (ELAB), Baton Rouge, LA 70803, United States;

    Louisiana State University, Department of Civil and Environmental Engineering, 3418 Patrick F. Taylor Hall, Baton Rouge, LA 70803, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chlorinated benzenes; chemical kinetics and equilibrium; modeling; sediment-water transfer;

    机译：氯化苯;化学动力学和平衡;造型;输沙水;

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