能量色散X射线荧光光谱技术在土壤重金属分析中的应用研究现状
O657.34; 伴随着城市化和工业化的进程,重金属通过各种途径进入生态环境并在土壤中大量富集,对土壤环境健康造成潜在风险.近年来随着能量色散X射线荧光光谱技术(ED-XRF)的发展,仪器的检出限明显降低,并能适用于土壤中各类重金属的检测,正逐渐成为测定土壤环境中重金属浓度的有效设备.然而,土壤基质的复杂性和仪器自身的限制会导致利用ED-XRF在测定目标重金属时存在准确度和精密度较低等问题.譬如土壤样品的类型及粒径、仪器和环境中的噪声均会对检测造成一定影响,同时在定量分析模型方法的建立上也存在一定难度,仍不能很好地应用于实验室等数据质量要求较高的环境.本文总结了 XRF在土壤重金属检测领域的应...
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| Published in | 岩矿测试 Vol. 43; no. 4; pp. 659 - 675 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学院南京土壤研究所,江苏南京 211135
01.07.2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0254-5357 |
| DOI | 10.15898/j.ykcs.202312230186 |
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| Abstract | O657.34; 伴随着城市化和工业化的进程,重金属通过各种途径进入生态环境并在土壤中大量富集,对土壤环境健康造成潜在风险.近年来随着能量色散X射线荧光光谱技术(ED-XRF)的发展,仪器的检出限明显降低,并能适用于土壤中各类重金属的检测,正逐渐成为测定土壤环境中重金属浓度的有效设备.然而,土壤基质的复杂性和仪器自身的限制会导致利用ED-XRF在测定目标重金属时存在准确度和精密度较低等问题.譬如土壤样品的类型及粒径、仪器和环境中的噪声均会对检测造成一定影响,同时在定量分析模型方法的建立上也存在一定难度,仍不能很好地应用于实验室等数据质量要求较高的环境.本文总结了 XRF在土壤重金属检测领域的应用与研究进展,探究了不同土壤样品状态及检测条件对ED-XRF仪器检测精确性的影响,梳理了 ED-XRF光谱的主要预处理方法以及定量分析模型的建立过程,分析了 ED-XRF在评估土壤重金属有效性上的应用潜力.当前,应用于ED-XRF检测的土壤样品制备程序已经相对成熟,在操作手段上如何减少土壤基体效应的影响,学者们的意见相对统一,即尽量使用干样、低粒径或压片土壤样品,而对检测数据的处理和分析还存在一定优化的空间.因此,目前主流的关注领域是结合不同算法的优点,进行ED-XRF光谱的预处理分析及建立定量分析模型来提高ED-XRF检测的精准度.但当下针对不同类型土壤的ED-XRF检测研究只点明了存在差异的现象,对其中的机理尚缺明晰的探究.未来需要继续探明不同基体效应存在于各类型土壤的原因及其影响大小,优化完善ED-XRF光谱定量分析模型,是ED-XRF定量分析研究的两个重要方向,通过多元回归分析对土壤中重金属有效性进行预测研究亦应是今后重点关注的领域. |
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| AbstractList | O657.34; 伴随着城市化和工业化的进程,重金属通过各种途径进入生态环境并在土壤中大量富集,对土壤环境健康造成潜在风险.近年来随着能量色散X射线荧光光谱技术(ED-XRF)的发展,仪器的检出限明显降低,并能适用于土壤中各类重金属的检测,正逐渐成为测定土壤环境中重金属浓度的有效设备.然而,土壤基质的复杂性和仪器自身的限制会导致利用ED-XRF在测定目标重金属时存在准确度和精密度较低等问题.譬如土壤样品的类型及粒径、仪器和环境中的噪声均会对检测造成一定影响,同时在定量分析模型方法的建立上也存在一定难度,仍不能很好地应用于实验室等数据质量要求较高的环境.本文总结了 XRF在土壤重金属检测领域的应用与研究进展,探究了不同土壤样品状态及检测条件对ED-XRF仪器检测精确性的影响,梳理了 ED-XRF光谱的主要预处理方法以及定量分析模型的建立过程,分析了 ED-XRF在评估土壤重金属有效性上的应用潜力.当前,应用于ED-XRF检测的土壤样品制备程序已经相对成熟,在操作手段上如何减少土壤基体效应的影响,学者们的意见相对统一,即尽量使用干样、低粒径或压片土壤样品,而对检测数据的处理和分析还存在一定优化的空间.因此,目前主流的关注领域是结合不同算法的优点,进行ED-XRF光谱的预处理分析及建立定量分析模型来提高ED-XRF检测的精准度.但当下针对不同类型土壤的ED-XRF检测研究只点明了存在差异的现象,对其中的机理尚缺明晰的探究.未来需要继续探明不同基体效应存在于各类型土壤的原因及其影响大小,优化完善ED-XRF光谱定量分析模型,是ED-XRF定量分析研究的两个重要方向,通过多元回归分析对土壤中重金属有效性进行预测研究亦应是今后重点关注的领域. |
| Abstract_FL | With the process of urbanization and industrialization,heavy metals enter the ecological environment through various pathways and accumulate in large quantities in the soil,causing potential risks to soil environmental health.In recent years,with the development of energy dispersive X-ray fluorescence spectroscopy(ED-XRF),the detection limit of the instrument has been significantly reduced,and it can be effectively applied to the detection of various heavy metals in soil,and is gradually becoming an effective tool for determining the concentration of heavy metals in the soil environment.However,the complexity of the soil matrix and the limitations of the instrument itself will lead to problems such as low accuracy and precision in the determination of target heavy metals by ED-XRF,such as the type and particle size of soil samples and the noise in the instrument and the environment;there are also certain difficulties in the establishment of quantitative analysis model methods,which are still not well applied to laboratories and other environments with high data quality requirements.In this paper,we summarize the application and research progress of XRF in the field of soil heavy metal detection,explore and analyze the influence of different soil sample states and detection conditions on the detection accuracy of ED-XRF instruments,sort out the main pretreatment methods of ED-XRF spectroscopy and the establishment process of quantitative analysis models,and introduce and analyze the application potential of ED-XRF in evaluating the effectiveness of soil heavy metals.At present,the soil sample preparation procedures applied to ED-XRF detection have been relatively mature,and the opinions of scholars on how to reduce the impact of soil matrix effects on the operation methods are relatively unanimous,that is,to use dry samples,low particle size or pressed soil samples as much as possible,and there is still some room for optimization in the processing and analysis of detection data.Therefore,the current mainstream focus is on combining the advantages of different algorithms for the preprocessing analysis of ED-XRF spectroscopy and the establishment of quantitative analysis models to improve the accuracy of ED-XRF detection.At the same time,ED-XRF detection studies on different types of soils only highlighted the differences in the phenomenon,and did not clearly explore the underlying mechanisms.In the future,it is important to continue to explore the causes and magnitude of different matrix effects in various types of soils,and to optimize and improve the quantitative analysis model of ED-XRF spectroscopy;the prediction of the effectiveness of heavy metals in soil through multiple regression analysis is also a field that scholars should focus on. |
| Author | 蒋奡松 吴龙华 李柱 |
| AuthorAffiliation | 中国科学院南京土壤研究所,江苏南京 211135 |
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| Author_FL | JIANG Aosong LI Zhu WU Longhua |
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| Author_xml | – sequence: 1 fullname: 蒋奡松 – sequence: 2 fullname: 吴龙华 – sequence: 3 fullname: 李柱 |
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| DocumentTitle_FL | Application of Energy Dispersive X-ray Fluorescence Spectroscopy in Analysis of Heavy Metals in Soil:A Review |
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| Keywords | influencing factors quantitative models effectiveness X射线荧光光谱 heavy metals 影响因素 光谱解析 有效性 spectral elucidation X-ray fluorescence spectroscopy 定量模型 重金属 |
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| Title | 能量色散X射线荧光光谱技术在土壤重金属分析中的应用研究现状 |
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