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首页> 外文期刊>Waste Management >Leaching behavior and environmental risk assessment of toxic metals in municipal solid waste incineration fly ash exposed to mature landfill leachate environment
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Leaching behavior and environmental risk assessment of toxic metals in municipal solid waste incineration fly ash exposed to mature landfill leachate environment

机译：城市固体废物焚烧粉煤灰暴露于成熟垃圾填埋场环境的浸出行为和环境风险评估

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摘要

Solidification/stabilization pretreatment + landfill disposal in municipal solid waste (MSW) landfill sites is a widely accepted MSW incineration (MSWI) fly ash (FA) management strategy in China. However, in reality, the stability of FA disposed in MSW landfill sites may be affected by the organic landfill leachate environment. The purpose of this study was to explore the mobility and environmental risks of six toxic metals (M~(n+), Pb/Zn/Cu/Cd/Cr/Ni), from raw and solidified/stabilized FA, by simulating a leaching environment with mature landfill leachate (MLL). The leaching of M~(n+) mainly occurred in the early leaching stage, and their leaching behavior was controlled by the diffusion of surface M~(n+) in the FA matrix. The destructive effect of dissolved organic matter (DOM) on the local precipitation-dissolution equilibrium of FA-leachate interface, the formation of non-adsorptive DOM-M~(n+) complex (easy to migrate), and the competitive effect of DOM on the binding sites of M~(n+) on the surface of the FA matrix may play an important role in increasing the leaching level of most M~(n+). By contrast, the potential of solidified FA in reducing the environmental risk level of leached M~(n+) was better than that of stabilized FA. However, the immobilization capability of solidification/stabilization pretreatment on various types of M~(n+) in FA should be judged according to their practical disposal environment. Compared to MLL leaching tests, Acetic Acid Buffer Solution Method (HJ/T300-2007) can effectively strengthen the exposure environment and provide a reliable reference level of environmental risk for MSWI FA disposed in MSW landfill sites.
机译：市政固体废物（MSW）垃圾填埋场的凝固/稳定预处理+垃圾填埋场是中国广泛接受的MSW焚烧（MSWI）飞灰（FA）管理战略。然而，实际上，在MSW垃圾填埋场处处置的FA的稳定性可能受到有机垃圾填埋场渗滤液环境的影响。本研究的目的是探讨从原材料的流动性和六个有毒金属（M〜（N +），铅/锌/铜/ CD /铬/镍）的环境风险，和固化/稳定化FA，通过模拟浸出环境成熟垃圾填埋场渗滤液（MLL）。 M〜（n +）的浸出主要发生在早期的浸出阶段，并且它们的浸出行为由FA基质中表面M〜（n +）的扩散来控制。溶解有机物（DOM）对FA型渗滤液界面局部沉淀溶出度平衡的破坏性影响，非吸附性Dom-m〜（n +）复合物的形成（易于迁移），以及DOM的竞争效果FA矩阵表面的M〜（n +）的结合位点可以在增加大多数m〜（n +）的浸出水平时起着重要作用。相比之下，凝固的FA在降低浸出的M〜（n +）的环境风险水平方面的潜力优于稳定的FA。然而，应根据其实际处置环境来判断FA中各种类型的M〜（N +）上的固化/稳定预处理的固定能力。与MLL浸出试验相比，乙酸缓冲溶液方法（HJ / T300-2007）可以有效地增强曝光环境，并为MSW垃圾填埋场中的MSWI FA提供可靠的环境风险参考水平。

著录项

  • 来源
    《Waste Management》 |2021年第2期|68-75|共8页
  • 作者

    Weihua Li; Kai Gu; Qianwen Yu; Yingjie Sun; Yan Wang; Mingxue Xin; Rongxing Bian; Huawei Wang; Ya-nan Wang; Dalei Zhang;

  • 作者单位

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

    Qingdao Solid Waste Pollution Control and Resource Engineering Research Center Qingdao University of Technology School of Environmental and Municipal Engineering Qingdao 266033 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Municipal solid waste incineration fly ash; Mature landfill leachate; Toxic metals; Mobility; Environmental risk;

    机译：市政固体废物焚烧粉煤灰;成熟的垃圾填埋场渗滤液;有毒金属;移动性;环境风险;

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