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    Toxicity Evaluation of Cement-Soda Residue Stabilized and Solidified Zn-Contaminated Soil under Cyclic Freezing–Thawing Condition

    Source: Journal of Environmental Engineering:;2024:;Volume ( 150 ):;issue: 009::page 04024043-1
    Author:
    Jingjing Liu
    ,
    Fusheng Zha
    ,
    Dongbiao Wu
    ,
    Peng Yu
    DOI: 10.1061/JOEEDU.EEENG-7649
    Publisher: American Society of Civil Engineers
    Abstract: The efficiency of stabilization/solidification (S/S) treated heavy metal contaminated soils may be deteriorated by the changeable external environment. Thus, the toxicity characteristics leaching procedure (TCLP) and pH-dependent leaching test were carried out to evaluate the toxicity of zinc-contaminated soil treated by cement blended with soda residue with consideration of freezing–thawing (F-T) cycles. Results showed that F-T cycles had little impact on the toxicity of Zn-contaminated soils treated with cement-soda residue, and the leached Zn2+ concentration didn’t exceed the regulatory limit defined by the standards. Dissolution/precipitation of zinc hydroxides was suggested to be the controlling mechanism for Zn2+ leachability. Besides, Zn2+ immobilized by chemical incorporation and encapsulation by calcium silicate hydrates (CSHs) and calcium aluminate hydrates (CAHs) still remained stable in an acidic condition. Results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) verified that F-T cycles impose little impact on the chemical properties of the specimens, but only alter the micro- and macrostructure characteristics.
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      Toxicity Evaluation of Cement-Soda Residue Stabilized and Solidified Zn-Contaminated Soil under Cyclic Freezing–Thawing Condition

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4298032
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    contributor authorJingjing Liu
    contributor authorFusheng Zha
    contributor authorDongbiao Wu
    contributor authorPeng Yu
    date accessioned2024-12-24T09:57:40Z
    date available2024-12-24T09:57:40Z
    date copyright9/1/2024 12:00:00 AM
    date issued2024
    identifier otherJOEEDU.EEENG-7649.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4298032
    description abstractThe efficiency of stabilization/solidification (S/S) treated heavy metal contaminated soils may be deteriorated by the changeable external environment. Thus, the toxicity characteristics leaching procedure (TCLP) and pH-dependent leaching test were carried out to evaluate the toxicity of zinc-contaminated soil treated by cement blended with soda residue with consideration of freezing–thawing (F-T) cycles. Results showed that F-T cycles had little impact on the toxicity of Zn-contaminated soils treated with cement-soda residue, and the leached Zn2+ concentration didn’t exceed the regulatory limit defined by the standards. Dissolution/precipitation of zinc hydroxides was suggested to be the controlling mechanism for Zn2+ leachability. Besides, Zn2+ immobilized by chemical incorporation and encapsulation by calcium silicate hydrates (CSHs) and calcium aluminate hydrates (CAHs) still remained stable in an acidic condition. Results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) verified that F-T cycles impose little impact on the chemical properties of the specimens, but only alter the micro- and macrostructure characteristics.
    publisherAmerican Society of Civil Engineers
    titleToxicity Evaluation of Cement-Soda Residue Stabilized and Solidified Zn-Contaminated Soil under Cyclic Freezing–Thawing Condition
    typeJournal Article
    journal volume150
    journal issue9
    journal titleJournal of Environmental Engineering
    identifier doi10.1061/JOEEDU.EEENG-7649
    journal fristpage04024043-1
    journal lastpage04024043-12
    page12
    treeJournal of Environmental Engineering:;2024:;Volume ( 150 ):;issue: 009
    contenttypeFulltext
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