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螯合剂固化生活垃圾焚烧飞灰中重金属的机理研究进展

杨延梅 慕宗宇 王菲 杨玉飞 杨金忠 罗中力 黄启飞

杨延梅, 慕宗宇, 王菲, 杨玉飞, 杨金忠, 罗中力, 黄启飞. 螯合剂固化生活垃圾焚烧飞灰中重金属的机理研究进展[J]. 环境科学研究, 2022, 35(10): 2388-2395. doi: 10.13198/j.issn.1001-6929.2022.06.21
引用本文: 杨延梅, 慕宗宇, 王菲, 杨玉飞, 杨金忠, 罗中力, 黄启飞. 螯合剂固化生活垃圾焚烧飞灰中重金属的机理研究进展[J]. 环境科学研究, 2022, 35(10): 2388-2395. doi: 10.13198/j.issn.1001-6929.2022.06.21
YANG Yanmei, MU Zongyu, WANG Fei, YANG Yufei, YANG Jinzhong, LUO Zhongli, HUANG Qifei. Review on Mechanisms of Chelating Agents to Solidify Heavy Metals in Municipal Solid Waste Incineration Fly Ash[J]. Research of Environmental Sciences, 2022, 35(10): 2388-2395. doi: 10.13198/j.issn.1001-6929.2022.06.21
Citation: YANG Yanmei, MU Zongyu, WANG Fei, YANG Yufei, YANG Jinzhong, LUO Zhongli, HUANG Qifei. Review on Mechanisms of Chelating Agents to Solidify Heavy Metals in Municipal Solid Waste Incineration Fly Ash[J]. Research of Environmental Sciences, 2022, 35(10): 2388-2395. doi: 10.13198/j.issn.1001-6929.2022.06.21

螯合剂固化生活垃圾焚烧飞灰中重金属的机理研究进展

doi: 10.13198/j.issn.1001-6929.2022.06.21
基金项目: 国家重点研发计划项目(No.2021YFE0112100)
详细信息
    作者简介:

    杨延梅(1975-),女,内蒙古满洲里人,教授,博士,主要从事固体废物处理处置与水污染防治等研究,cqyymei@163.com

    通讯作者:

    黄启飞(1973-),男,湖北宜昌人,研究员,博士,主要从事固体废物管理与处理处置技术研究,huangqf@craes.org.cn

  • 中图分类号: X705

Review on Mechanisms of Chelating Agents to Solidify Heavy Metals in Municipal Solid Waste Incineration Fly Ash

Funds: National Key Research and Development Program of China (No.2021YFE0112100)
  • 摘要: 填埋是目前处理生活垃圾焚烧飞灰的主要方式之一,然而飞灰中重金属随渗滤液浸出会对环境产生污染隐患,药剂固化飞灰中重金属是主要预处理方式. 其中,化学药剂中的螯合剂类对飞灰中重金属的固化效果较好,国内外使用广泛. 本文通过对比多种有机螯合剂的重金属固化率发现,具有不同官能团(醛基、羟基、羧基、磷酸官能团和含硫基官能团)的螯合剂的固化效果有明显差异,其中含有磷酸官能团和硫基官能团的螯合剂对飞灰中重金属的固化效果普遍优于含醛基、羟基、羧基官能团的螯合剂. 因此,可根据填埋场渗滤液的酸碱性,通过添加羧基、羟基或磷酸官能团改性有机螯合剂,使填埋场渗滤液达到中性. 同时,螯合固化体形成正四面体结构最为稳定,可以降低飞灰中重金属浸出率,减少填埋场污染隐患.

     

  • 表  1  螯合剂对特征重金属的固化率[17-21]

    Table  1.   Curing rate of characteristic heavy metals by chelating agents[17-21]

    螯合剂添加量/%重金属固化率/%
    CdPbCuZn
     SGA(六硫代胍酸) 2.0 66.22 94.27 96.68 88.17
     SDD(二甲基二硫代氨基甲酸钠) 2.0 67.98 90.42 96.32 69.98
     KOP(有机可溶性磷酸盐) 1.5 95.8 96.1 75.4 66.7
     DTC(二乙基二硫代氨基甲酸盐) 1.5 96.7 97.3 80.7 70.3
    3.0 99.0 99.1 86.2 76.9
     ME-608(含硫基环状分子) 3.0 98.76 97.71 21.79
     XD-31(含硫基链状大分子) 3.0 99.43 97.55 14.93
     TMT(三巯基均三嗪三钠盐类) 2.0 94.89 98.43 99.98 51.47
     DTCR(二硫代氨基甲酸盐衍生物) 2.25 97.5 98.89 99.73 68.29
     二硫代氨基甲酸型木质素 3.0 97.8 86.2 87.2
     DDTC(三水合N,N-二乙基二硫代氨基甲酸钠) 2.7 94.67 97.84 97.87
     PDTC (哌嗪二硫代氨基甲酸盐) 2.0 96.73 99.76 97.86 56.78
    注:—表示未检测.
    下载: 导出CSV

    表  2  含磷酸官能团类螯合剂对特征重金属的固化率[17-21]

    Table  2.   Curing efficiency of characteristic heavy metals by chelating agents containing phosphate functional groups[17-21]

    螯合剂名称添加量/%重金属固化率/%
    CdPbCuZn
    有机螯合剂KOP(有机可
    溶性磷酸盐)
    1.595.896.175.466.7
    无机螯合剂Na3PO41.533.341.132.622.8
    3.050.563.440.735.4
    5.078.383.457.143.6
    NaH2PO41.545.450.439.735.5
    3.063.270.556.343.7
    5.086.890.771.259.15
    下载: 导出CSV

    表  3  含硫基团类螯合剂对特征重金属的固化率[17-21]

    Table  3.   Sulfur group-containing chelators for characteristic heavy metal curing efficiency[17-21]

    螯合剂名称添加量/%重金属固化率/%
    CdPbCuZn
    有机螯合剂 DTC(二乙基二硫代氨基甲酸盐) 1.5 96.7 97.3 80.7 70.3
    3.0 99.0 99.1 86.2 76.9
    PDTC(哌嗪二硫代氨基甲酸盐) 2.0 96.73 99.76 97.86 56.78
    DTCR(二硫代氨基甲酸盐衍生物) 2.25 97.5 98.89 99.73 68.29
    SDD (二甲基二硫代氨基甲酸钠) 2.0 67.98 90.42 96.32 69.98
    DDTC(三水合N,N-二乙基二硫代氨基甲酸钠) 2.7 94.67 97.84 97.87
    SGA (六硫代胍酸) 2.0 66.22 94.27 96.68 88.17
    TMT( 三巯基均三嗪三钠盐类) 2.0 94.89 98.43 99.98 51.47
    二硫代氨基甲酸型木质素 3.0 97.8 86.2 87.2
    ME-608(含硫基环状分子) 3.0 98.76 97.71 21.79
    XD-31(含硫基链状大分子) 3.0 99.43 97.55 14.93
    无机螯合剂 Na2S 1.5 49.6 43.6 40.5 32.5
    3.0 70.3 65.8 56.7 43.2
    5.0 89.1 85.7 73.8 56.1
    注:—表示未检测.
    下载: 导出CSV
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  • 收稿日期:  2022-03-23
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