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dc.contributor.authorPearson, Delaina
dc.contributor.authorKoch, Jaco
dc.contributor.authorVan Deventer, Piet
dc.contributor.authorDe Wet, Jandre
dc.contributor.authorWeindorf, David C.
dc.date.accessioned2019-06-18T08:33:57Z
dc.date.available2019-06-18T08:33:57Z
dc.date.issued2018
dc.identifier.citationPearson, D. et al. 2018. Analysis of metal-laden water via portable X-ray fluorescence spectrometry. Journal of hydrology, 561:267-276. [https://doi.org/10.1016/j.jhydrol.2018.04.014]en_US
dc.identifier.issn0022-1694
dc.identifier.urihttp://hdl.handle.net/10394/32824
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0022169418302671
dc.identifier.urihttps://doi.org/10.1016/j.jhydrol.2018.04.014
dc.description.abstractA rapid method for in-situ elemental composition analysis of metal-laden water would be indispensable for studying polluted water. Current analytical lab methods to determine water quality include flame atomic absorption spectrometry (FAAS), atomic absorption spectrophotometry (AAS), electrothermal atomic absorption spectrometry (EAAS), and inductively coupled plasma (ICP) spectroscopy. However only two field methods, colorimetry and absorptiometry, exist for elemental analysis of water. Portable X-ray fluorescence (PXRF) spectrometry is an effective method for elemental analysis of soil, sediment, and other matrices. However, the accuracy of PXRF is known to be affected while scanning moisture-laden soil samples. This study sought to statistically establish PXRF’s predictive ability for various elements in water at different concentrations relative to inductively coupled plasma atomic emission spectroscopy (ICP-AES). A total of 390 metal-laden water samples collected from leaching columns of mine tailings in South Africa were analyzed via PXRF and ICP-AES. The PXRF showed differential effectiveness in elemental quantification. For the collected water samples, the best relationships between ICP and PXRF elemental data were obtained for K and Cu (R2 = 0.92). However, when scanning ICP calibration solutions with elements in isolation, PXRF results indicated near perfect agreement; Ca, K, Fe, Cu and Pb produced an R2 of 0.99 while Zn and Mn produced an R2 of 1.00. The utilization of multiple PXRF (stacked) beams produced stronger correlation to ICP relative to the use of a single beam in isolation. The results of this study demonstrated the PXRF's ability to satisfactorily predict the composition of metal-laden water as reported by ICP for several elements. Additionally this study indicated the need for a “Water Mode” calibration for the PXRF and demonstrates the potential of PXRF for future study of polluted or contaminated watersen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectPXRFen_US
dc.subjectWater analysisen_US
dc.subjectMetalsen_US
dc.titleAnalysis of metal-laden water via portable X-ray fluorescence spectrometryen_US
dc.typeArticleen_US
dc.contributor.researchID21046832 - Koch, Jaco
dc.contributor.researchID10058591 - Van Deventer, Pieter Willem
dc.contributor.researchID22142894 - De Wet, Jan Hendrik


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