On site determination of trace metals in estuarine sediments by field-portable-XRF

Talanta
Andrew Turner, Alex Taylor

Abstract

A portable x-ray fluorescence (XRF) spectrometer and mobile test stand have been employed to examine the feasibility of on site measurements of trace metals in estuarine sediment. In the laboratory, the instrument was able to detect the trace metals: As, Cr, Cu, Pb, Sn and Zn; and the geochemical proxy metals: Ca, Fe, K and Rb; in both fresh and freeze-dried surficial samples from the Tamar and Tavy estuaries, southwest England, that had been emplaced in polyethylene bags over the detector window. The presence of interstitial water in fresh samples acted as both a diluent of sediment mass and an attenuator of incident and fluorescent x-rays, resulting in measured (fresh weight) metal concentrations that were significantly lower than corresponding (dry weight) concentrations derived from dry analyses. Gravimetric correction for fractional water content (fw ~ 0.2-0.6) gave rise to results that were within 20% of those derived from dry analyses with the exception of K, whose relatively low energy fluorescent x-rays were subject to significant attenuation from the aqueous medium; further x-ray attenuation was observed for both K and Ca through the sample bag, thereby limiting the usefulness of the approach for these metals. A relat...Continue Reading

References

Jul 15, 2009·Journal of Hazardous Materials·Tanja Radu, Dermot Diamond
Jan 12, 2010·Marine Pollution Bulletin·Andrew Turner
Nov 16, 2016·Environmental Science and Pollution Research International·Guangming ZhaoJin Wang
Dec 19, 2016·Archives of Environmental Contamination and Toxicology·Yasir M AlyazichiHeidi Brown
Mar 28, 2017·The Science of the Total Environment·Andrew TurnerMurray T Brown
Aug 7, 2017·Marine Pollution Bulletin·Andrew Turner
May 8, 2018·The Science of the Total Environment·Andrew Turner, Madeleine Lewis

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Citations

Apr 2, 2019·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Panshu SongBing Wu
Jan 21, 2019·Marine Pollution Bulletin·Andrew Turner
Nov 27, 2020·Journal of Soils and Sediments·Adrian L CollinsYusheng Zhang
Dec 3, 2020·Anais Da Academia Brasileira De Ciências·Darci S SilvaMarcos A Bezerra
Mar 3, 2020·Ecotoxicology and Environmental Safety·Md Solaiman HossainM Safiur Rahman

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