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    Organoclay with Soil-Bentonite Admixture as Waste Containment Barriers

    Source: Journal of Environmental Engineering:;2001:;Volume ( 127 ):;issue: 008
    Author:
    Irene M.-C. Lo
    DOI: 10.1061/(ASCE)0733-9372(2001)127:8(756)
    Publisher: American Society of Civil Engineers
    Abstract: Organoclays, clays modified by cationic surfactants, for engineering applications have recently drawn great attention because of their high organic removal capacity. In this study, the potential use of organoclays with soil-bentonite admixtures as waste containment barriers is investigated by experimental tests such as batch equilibrium sorption studies, compaction tests, and hydraulic conductivity tests. Sorption isotherms of total organic carbon (TOC), a gross organic term, by five different types of soil admixtures are nonlinear. The soil specimen with more organoclays exhibits higher organic sorption capacity and a larger retardation factor. The specimens with 20% by dry weight of bentonite have higher optimum water content and plasticity. With the addition of bentonite in the soil material consisting of completely decomposed volcanic rock (CDV) (natural soils) and organoclays, the hydraulic conductivity to leachate decreases from about 10
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      Organoclay with Soil-Bentonite Admixture as Waste Containment Barriers

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    contributor authorIrene M.-C. Lo
    date accessioned2017-05-08T21:33:06Z
    date available2017-05-08T21:33:06Z
    date copyrightAugust 2001
    date issued2001
    identifier other%28asce%290733-9372%282001%29127%3A8%28756%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/55854
    description abstractOrganoclays, clays modified by cationic surfactants, for engineering applications have recently drawn great attention because of their high organic removal capacity. In this study, the potential use of organoclays with soil-bentonite admixtures as waste containment barriers is investigated by experimental tests such as batch equilibrium sorption studies, compaction tests, and hydraulic conductivity tests. Sorption isotherms of total organic carbon (TOC), a gross organic term, by five different types of soil admixtures are nonlinear. The soil specimen with more organoclays exhibits higher organic sorption capacity and a larger retardation factor. The specimens with 20% by dry weight of bentonite have higher optimum water content and plasticity. With the addition of bentonite in the soil material consisting of completely decomposed volcanic rock (CDV) (natural soils) and organoclays, the hydraulic conductivity to leachate decreases from about 10
    publisherAmerican Society of Civil Engineers
    titleOrganoclay with Soil-Bentonite Admixture as Waste Containment Barriers
    typeJournal Paper
    journal volume127
    journal issue8
    journal titleJournal of Environmental Engineering
    identifier doi10.1061/(ASCE)0733-9372(2001)127:8(756)
    treeJournal of Environmental Engineering:;2001:;Volume ( 127 ):;issue: 008
    contenttypeFulltext
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