Application of portable X-ray fluorescence spectrometry in environmental investigation of heavy metal-contaminated sites and comparison with laboratory analysis

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Ding, Liang^1 ; Wang, Shui^1 ; Cai, Bingjie^1 ; Zhang, Mancheng^1 ; Qu, Changsheng^1

Jiangsu Provincial Academy of Environmental Science, Jiangsu Provincial Key Laboratory of Environmental Engineering, Nanjing, Jiangsu

210036, China^1

关键词: Accuracy and precision;    Detection technology;    Environmental investigation;    Heavy metal contaminated site;    Heavy metal contents;    Heavy metals in soil;    Linear relationships;    Portable x-ray fluorescence spectrometries;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/3/032031/pdf
DOI  :  10.1088/1755-1315/121/3/032031

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, portable X-ray fluorescence spectrometry (pXRF) was used to measure the heavy metal contents of As, Cu, Cr, Ni, Pb and Zn in the soils of heavy metal-contaminated sites. The precision, accuracy and system errors of pXRF were evaluated and compared with traditional laboratory methods to examine the suitability of in situ pXRF. The results show that the pXRF analysis achieved satisfactory accuracy and precision in measuring As, Cr, Cu, Ni, Pb, and Zn in soils, and meets the requirements of the relevant detection technology specifications. For the certified reference soil samples, the pXRF results of As, Cr, Cu, Ni, Pb, and Zn show good linear relationships and coefficients of determination with the values measured using the reference analysis methods; with the exception of Ni, all the measured values were within the 95% confidence level. In the soil samples, the coefficients of determination between Cu, Zn, Pb, and Ni concentrations measured laboratory pXRF and the values measured with laboratory analysis all reach 0.9, showing a good linear relationship; however, there were large deviations between methods for Cr and As. This study provides reference data and scientific support for rapid detection of heavy metals in soils using pXRF in site investigation, which can better guide the practical application of pXRF.