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手持式XRF在土壤调查修复项目中应用的可靠性分析

孙中瑾 张莹莹 叶小瑭 李新元 满伟慧 刘超 史瑞 刘敬兵 王子鸣

孙中瑾,张莹莹,叶小瑭,等.手持式XRF在土壤调查修复项目中应用的可靠性分析[J].环境工程技术学报,xxxx,x(x): x-xx doi: 10.12153/j.issn.1674-991X.20230715
引用本文: 孙中瑾,张莹莹,叶小瑭,等.手持式XRF在土壤调查修复项目中应用的可靠性分析[J].环境工程技术学报,xxxx,x(x): x-xx doi: 10.12153/j.issn.1674-991X.20230715
SUN Z J,ZHANG Y Y,YE X T,et al.Reliability analysis of handheld XRF application in soil investigation and remediation projects[J].Journal of Environmental Engineering Technology,xxxx,x(x): x-xx doi: 10.12153/j.issn.1674-991X.20230715
Citation: SUN Z J,ZHANG Y Y,YE X T,et al.Reliability analysis of handheld XRF application in soil investigation and remediation projects[J].Journal of Environmental Engineering Technology,xxxx,x(x): x-xx doi: 10.12153/j.issn.1674-991X.20230715

手持式XRF在土壤调查修复项目中应用的可靠性分析

doi: 10.12153/j.issn.1674-991X.20230715
详细信息
    作者简介:

    孙中瑾(1990—),男,注册土木工程师(岩土),硕士研究生,主要从事水文地质、工程地质和环境地质研究,1140860142@qq.com

    通讯作者:

    史瑞(1986—),女,高级工程师,硕士研究生,主要从事土壤污染调查与修复研究,shirui1986@whu.edu.cn

  • 中图分类号: X833

Reliability analysis of handheld XRF application in soil investigation and remediation projects

  • 摘要:

    为确定手持式X射线荧光(XRF)法测量精度和准确度是否能够满足土壤环境快速检测要求,以山东省济宁市某地块土壤污染状况调查项目为背景,分别采用XRF快速检测仪检测和实验室检测方法对浅层土层(0.2~0.5m)和深层土层(1.5~2.0 m)样品中砷(As)、铜(Cu)、铅(Pb)、锌(Zn)和镍(Ni)共5种元素浓度进行检测。结果表明:浅层土层重金属As的XRF检测值普遍高于实验室检测值,重金属Cu、Pb、Zn、Ni的XRF检测值普遍低于实验室检测值,误差普遍在±30%以内;浅层土层的重金属元素XRF检测值与实验室检测值普遍相对偏差RD(-33.82%~23.53%)及总体相对偏差标准差(6.79~19.52)小于深层土层(分别为-30.26%~98.36%、9.53~49.77),相对偏差的离散程度小于深层土层;浅层土层的重金属的决定系数R2(0.776 2~0.954 9)普遍高于深层土层R2(0.776 2~0.954 9),相关性高于深层土层。野外使用XRF对土壤样品中重金属进行检测时,所采取的土壤样品尽量避免大颗粒,对样品待测面进行压实、压平处理,对于含水率高的样品应适当进行干燥处理,以降低检测误差。虽然手持式XRF检测存在一定误差,但在土壤污染状况调查项目中可以较好反映土壤元素浓度范围,具有较高的可靠性,可以满足项目土壤快速检测需求。

     

  • 图  1  X射线荧光光谱仪的2种基本类型

    Figure  1.  Two basic types of X-ray fluorescence spectrometer

    图  2  浅层土壤XRF与实验室检测重金属浓度对比

    Figure  2.  Comparison of XRF and laboratory detection of heavy metal concentrations in shallow soil

    图  3  深层土壤XRF与实验室检测重金属浓度对比

    Figure  3.  Comparison of XRF and laboratory detection of heavy metal concentrations in deep soil

    图  4  XRF法与实验室检测土壤重金属浓度相对偏差标准差

    Figure  4.  Standard deviation of relative deviation between XRF and laboratory detection of soil heavy metal concentrations

    图  5  实验室与XRF法测定浅层土壤重金属的相关性

    Figure  5.  Correlation between laboratory and XRF methods for determining heavy metals in shallow soil

    图  6  实验室与XRF法测定深层土壤重金属的相关性

    Figure  6.  Correlation between Laboratory and XRF methods for determining heavy metals in deep soil

    表  1  XRF检测值与实验室检测值相对偏差标准差

    Table  1.   Standard deviation of relative deviation between XRF detection values and laboratory detection values

    土层 误差类别 As Cu Pb Zn Ni*
    浅层 相对偏差RD/% −33.82~31.17 −29.63~0.00 −23.08~23.53 −22.22~0.00 −38.27~-10.53
    相对偏差标准差 19.52 9.93 16.19 6.79 11.13
    深层 相对偏差RD/% −30.26~98.36 −25.81~5.56 −27.59~25.00 −20.97~16.36 −38.78~12.50
    相对偏差标准差 49.77 9.53 19.69 9.95 15.10
      注:*重金属Ni浅层土层仅3#、10#和11#样本以及深层土层16#、21#和23#样本相对偏差下限低于−30%。
    下载: 导出CSV

    表  2  重金属元素的XRF检测值与实验室检测值拟合结果

    Table  2.   Fitting results of XRF detection values and laboratory detection values of heavy metal elements

    土层参数及评价标准AsCuPbZnNi
    浅层土层
    0.2~0.5m
    线性方程y=1.051 6xy=0.747 2xy=0.898 2xy=0.877 6xy=0.673 1x
    决定系数0.77620.926 20.863 60.954 90.916 9
    相关性极强极强极强极强
    准确度筛选性确定性确定性确定性确定性
    深层土层
    1.5~2.0m
    线性方程y=1.101 7xy=0.794 6xy=0.908 5xy=0.944 8xy=0.760 7x
    决定系数0.542 90.955 30.670 40.929 70.695 5
    相关性中等极强极强
    准确度定性筛选性确定性定性筛选性确定性定性筛选性
      注:x为实验室检测值、y为XRF检测值;浅层土层样本数为11,深层土层样本数为12。
    下载: 导出CSV

    表  3  实验室检测值与XRF检测值数据偏差统计表

    Table  3.   Statistical table for deviation between laboratory test values and XRF data

    土层参数AsCuPbZnNi
    浅层土层偏差绝对值最大值2.413.06.018.031.0
    均方根误差1.442.193.417.7310.24
    深层土层偏差绝对值最大值6.311.09.01319
    均方根误差3.331.894.076.014.76
    下载: 导出CSV
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  • 收稿日期:  2023-10-08
  • 录用日期:  2024-01-31
  • 修回日期:  2023-12-05
  • 网络出版日期:  2024-03-08

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