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Characteristics of MSWI fly ash with acid leaching treatment

CAO Yi-nan LUO Jin-jing SUN Shi-qiang

曹祎男, 罗津晶, 孙士强. 垃圾焚烧飞灰浸出特性及理化性质研究[J]. 燃料化学学报(中英文), 2021, 49(8): 1208-1218. doi: 10.1016/S1872-5813(21)60119-6
引用本文: 曹祎男, 罗津晶, 孙士强. 垃圾焚烧飞灰浸出特性及理化性质研究[J]. 燃料化学学报(中英文), 2021, 49(8): 1208-1218. doi: 10.1016/S1872-5813(21)60119-6
CAO Yi-nan, LUO Jin-jing, SUN Shi-qiang. Characteristics of MSWI fly ash with acid leaching treatment[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1208-1218. doi: 10.1016/S1872-5813(21)60119-6
Citation: CAO Yi-nan, LUO Jin-jing, SUN Shi-qiang. Characteristics of MSWI fly ash with acid leaching treatment[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1208-1218. doi: 10.1016/S1872-5813(21)60119-6

垃圾焚烧飞灰浸出特性及理化性质研究

doi: 10.1016/S1872-5813(21)60119-6
详细信息
  • 中图分类号: X705

Characteristics of MSWI fly ash with acid leaching treatment

Funds: The project was supported by Fujian Province Science and Technology Planning Project of China (2016H0033)
More Information
  • 摘要: 文章研究了福建某垃圾焚烧厂飞灰的化学、矿物学特征以及不同处理工艺对飞灰中重金属脱除效率的影响。结果表明:垃圾焚烧飞灰表面结构复杂,比表面积较小,而飞灰中的碱性氯化物和金属化合物对酸洗处理过程中的浸出效率有明显影响。飞灰中的金属浸出效率与其性质和形态有关。水洗处理可造成飞灰中组成物质和化合物形态的变化,并显著去除飞灰中水溶性化合物如KCl、NaCl和CaCl2,对Cl、Na、K和Ca的去除率分别为93.1%、41.4%、48.5%和24.8%。酸灰比为40∶1(kg/L)、处理时间为120 min的酸洗处理可显著降低垃圾焚烧飞灰中Cu、Zn、Cd和Pb的毒性浸出浓度(80%−100%),在一定程度上降低As的毒性浸出浓度(30%−80%),但对Ni的脱除效果较差(< 30%)。而采用二次水洗+酸洗的组合处理工艺可进一步降低垃圾焚烧飞灰的环境风险。
  • FIG. 844.  FIG. 844.

    FIG. 844. 

    Figure  1  Flow chart of samples preparation

    Figure  2  Particle size distribution of the RA sample

    Figure  3  FT-IR spectrum of RA sample

    Figure  4  XRD patterns of RA and WA sample

    Figure  5  Scanning electron micrographs of RA ((a), (b)) and WA ((c), (d))

    Figure  6  Nitrogen adsorption/desorption isotherms and the corresponding pore-size distribution of RA sample

    Figure  7  Change in toxicity characteristic leaching procedure concentrations of samples as treatment time and leaching ratio during leaching process

    Table  1  Main elements constitute of the RA and WA samples

    ElementRA w/%WA w/%
    O37.6239.98
    Na2.21.29
    Si4.356.54
    S1.882.38
    Cl10.780.74
    K2.271.17
    Ca36.8227.68
    下载: 导出CSV

    Table  2  TCPL concentration of targeted metals detected in RA, LA and WLA samples by HJ/T300-2007

    ItemRegulatory levelaLeaching concentration/(mg·L−1)
    RALAWLA
    Be0.020.01NDbND
    Cr4.51.290.860.23
    Ni0.50.350.310.05
    Cu405.840.430.15
    Zn10042.901.761.62
    As0.30.840.22ND
    Cd0.153.520.040.02
    Pb0.2523.661.420.14
    note: a: regulatory level refers to GB 16889-2008 of China; b: ND means not tested or lower level than the detectable limits of ICP-MS
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-01-15
  • 修回日期:  2021-03-07
  • 网络出版日期:  2021-06-11
  • 刊出日期:  2021-08-31

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