Nature of serpentinite interactions with low-concentration sulfuric acid solutions

Chaizada Yeskibayeva, Abdrazakh Auyeshov, K.Т. Arynov, Aizhan Dikanbayeva, Asem Satimbekova

Green Processing and Synthesis, 2024

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DOI 10.1515/gps-2024-0034

Data confidence 70 medium

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Abstract

Abstract The nature of serpentinite interaction with low-concentration sulfuric acid solutions is studied. Using IR-Fourier spectroscopy, X-ray, and serpentinite leaching with sulfuric acid solutions containing 10–60% of stoichiometrically required amount (SRA) of H 2 SO 4 (taken relative to the molar magnesium content in serpentinite), it is shown that the appearance and influence of silica on the course of serpentinite dissolution is detected at concentrations of 30–40% of SRA of H 2 SO 4 . On the basis of the obtained results, this article points out the technological, economic, and ecological advantages of use of sulfuric acid solutions of low concentrations in the process of acid processing with the aim of producing magnesium salts.