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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Evaluating the Cause(s) of Progressive Permeability Reduction for a Zerovalent Iron (ZVI) Permeable Reactive Barrier (PRB)
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Evaluating the Cause(s) of Progressive Permeability Reduction for a Zerovalent Iron (ZVI) Permeable Reactive Barrier (PRB)

机译：评价零铁（ZVI）渗透性反应性屏障（PRB）的渐进式渗透率降低的原因

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Background/Objectives. A zerovalent iron (ZVI) permeable reactive barrier (PRB) was installed in 2004/2005 at an industrial site in Mississippi to treat groundwater impacted with trichloroethene (TCE) and its daughter products. The PRB is 1,200 feet long and is keyed into a clay-shale aquitard approximately 60-feet below ground surface. The PRB width and composition varies from 6 feet with 100 percent granular ZVI to 2.5 feet with 50 percent granular ZVI; portions of the PRB were designed to treat groundwater with a combined chlorinated ethenes (CE) concentration of up to 100 mg/L. Within the first year of operation, groundwater monitoring revealed evidence of incomplete treatment of the CE plume, and an investigation was initiated to determine the cause. After the second year of operation, monitoring data revealed evidence of decreasing PRB permeability with time and this became the focus of the investigation. This paper presents methods and results of an investigation completed to identify the cause(s) of progressive PRB permeability reduction.
机译：背景/目标。 Zerovalent Iron（ZVI）可渗透的反应性屏障（PRB）于2004/2005年安装在密西西比的工业部位，以治疗受三氯乙烯（TCE）及其女儿产品影响的地下水。 PRB长1,200英尺长，并键入粘土页岩宿舍，大约60英尺的地面。 PRB宽度和组成因6英尺而异，100％粒状ZVI至2.5英尺，粒状ZVI 50％; PRB的部分设计用于将地下水与组合的氯化醚（CE）浓度高达100mg / L.在运营的第一年内，地下水监测揭示了对CE羽流不完全治疗的证据，并开始调查以确定原因。在第二年的运作后，监测数据显示有时间随着时间的推移降低PRB渗透性的证据，这成为调查的重点。本文介绍了完成调查的方法和结果，以确定逐步PRB渗透率降低的原因。

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