STP1482

    Electrokinetically Enhanced Settlement and Remediation of Contaminated Sediment

    Published: Jan 2006


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    Abstract

    Electrokinetic technique has been used in sedimentation at mining applications as a volume reduction for slurry tailing wastes. This technique has been used in remediation for environmental application as a potential in-situ remediation method for contaminated soils and wastes. Thus electrokinetic technique can be used in sedimentation and remediation of sediments. A regulated constant voltage was applied on the testing sample, directed upward, top cathode (-) and bottom anode (+) during electrokinetic sedimentation process. On the other hand, constant voltage was applied on the testing sample, directed downward, top anode (+) and bottom cathode (-) during electrokinetic remediation process. This means that the polarity reversal was employed. The time dependent settlement and concentration due to electrophoresis and electro-osmosis was measured on an hourly basis. The sedimentation rate of specimen and removal rate of contaminant in contaminated sediment were increased with increasing of applied voltages.

    Keywords:

    electrokinetic, sedimentation, remediation, contaminant, sediment


    Author Information:

    Chung, HI
    Research Fellow, Korea Institute of Construction Technology, Gyeonggi-do,

    Sills, GC
    Professor, Oxford University, Oxford,

    Kamon, M
    Professor, Graduate School of Global Environmental Studies, Kyoto University, Sakyo-ku,


    Paper ID: STP37696S

    Committee/Subcommittee: D18.14

    DOI: 10.1520/STP37696S


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