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Determination of Rhenium in Sediments of the Volga Shale Basin by the X-ray Method with Preliminary Electrochemical Concentration

Authors: Shakurov R.I., Kuznetsov V.V., Filatova E.A., Averina Yu.M., Boldyrev V.S. Published: 01.03.2026
Published in issue: #6(123)/2025  
DOI:

 
Category: Chemistry | Chapter: Physical Chemistry  
Keywords: rhenium, schists, determination, electrochemical preconcentration, X-ray fluorescence analysis

Abstract

The shales of the Kotsyubinsky deposit in the Volga basin are promising as an alternative source of a rare and strategically important metal --- rhenium. To assess the feasibility of their processing, data on the quantitative content of rhenium is required, which requires the development of a relatively fast and reliable analysis method. In the article, the determination of rhenium is carried out by the X-ray fluorescence method with preliminary electrochemical concentration of the metal by its deposition on the cathode after preliminary opening of the sample. The use of X-ray fluorescence analysis makes it possible to determine rhenium against the background of a tenfold excess of molybdenum and other metals. The rhenium content in clay shales was found to be 0.68--0.20 g/t, which makes their processing economically justified. Rhenium was not found in black shales. The results of analysis using the X-ray fluorescence method with preliminary electrochemical concentration are comparable to those obtained by the ICP-MS method. At the same time, analysis by the ICP-OES method leads to underestimated results on the rhenium content, which is apparently due to its refractoriness. Comparing two methods that lead to reliable results (ICP-MS and electrochemical concentration + X-ray fluorescence analysis), it can be noted that the proposed method does not require expensive equipment and can be implemented in the field

The work was carried out within the framework of the State Assignment (project no. FSFN-2025-0013 (0705-2025-0013))

Please cite this article in English as:

Shakurov R.I., Kuznetsov V.V., Filatova E.A., et al. Determination of rhenium in sediments of the Volga Shale basin by the X-ray method with preliminary electrochemical concentration. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2025, no. 6 (123), pp. 120--132 (in Russ.). EDN: ZEHRKE

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