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首页> 外文期刊>RSC Advances >Weathering treatment coupled with nano-silica filling to promote the engineering property of municipal solid waste incinerator bottom ash
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Weathering treatment coupled with nano-silica filling to promote the engineering property of municipal solid waste incinerator bottom ash

机译：耐候处理与纳米二氧化硅填充相结合，促进市政固体废物焚烧炉底灰的工程性能

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摘要

A new approach including weathering treatment and nano-silica filling was employed to promote the engineering properties of municipal solid waste incinerator (MSWI) bottom ash. X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron dispersive spectroscopy (EDS) was used to characterize the mineralogical and morphological changes due to the treatment. Changes of chemical stability, compressive strength and heavy metal leaching of MSWI bottom ash were also explored. After the weathering treatment, the content of organic matter decreased from 2.70% to 1.07%, while the carbonates increased from 0.70% to 2.05%. The nano-silica treatment filled the intrinsic and neo-formed micropores and coated the surface of MSWI bottom ash. Due to this process, the chemical stability was promoted. The compressive strength increased from 4.83 to 5.32 MPa. The leaching of Cu, Zn, Pb, Cr and Cd sharply decreased from 250.05 to 89.97 mg L-1, 1080.45 to 173.14 mg L-1, 1.25 to 0.70 mg L-1, 72.58 to 12.96 mg L-1 and 0.94 to 0.30 mg L-1, respectively. The results suggested that the weathering treatment coupled with nano-silica filling could greatly promote the engineering properties of MSWI bottom ash, which is beneficial with respect to the reuse of MSWI bottom ash as the building material.
机译：采用一种新方法，包括耐候性和纳米二氧化硅填充物，促进城市固体废物焚烧炉（MSWI）底灰的工程性能。 X射线衍射（XRD），扫描电子显微镜（SEM）和电子分散光谱（EDS）用于表征由于治疗引起的矿物学和形态学变化。还探讨了MSWI底灰的化学稳定性，抗压强度和重金属浸出的变化。在耐候处理之后，有机物含量从2.70％降至1.07％，而碳酸盐从0.70％增加至2.05％。纳米二氧化硅处理填充内在和新形成的微孔并涂覆MSWI底灰的表面。由于该过程，促进了化学稳定性。抗压强度从4.83增加到5.32MPa。 Cu，Zn，Pb，Cr和Cd的浸出从250.05至89.97mg L-1,1080.45至173.14mg L-1,1，1.25至0.70mg L-1,72.58至12.96mg L-1和0.94至0.30分别为mg l-1。结果表明，与纳米二氧化硅填充相结合的耐候处理可以大大促进MSWI底灰的工程性质，这对MSWI底灰作为建筑材料的重用有益。

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  • 来源
    《RSC Advances》 |2018年第67期|共5页
  • 作者

    Kong Qingna; Yao Jun; Yang Qian; Shen Dongshen; Long Yuyang;

  • 作者单位

    Taizhou Univ Coll Life Sci Linhai 317000 Peoples R China;

    Taizhou Univ Coll Life Sci Linhai 317000 Peoples R China;

    Taizhou Environm Protect Bur Taizhou 318000 Peoples R China;

    Zhejiang Gongshang Univ Zhejiang Prov Key Lab Solid Waste Treatment &

    Rec Hangzhou 310018 Zhejiang Peoples R China;

    Zhejiang Gongshang Univ Zhejiang Prov Key Lab Solid Waste Treatment &

    Rec Hangzhou 310018 Zhejiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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