FEASIBILITY STUDY INTO THE POSSIBILITY OF MANGANESE ORE ENRICHMENT WASTE USE FOR SORBENT MATERIAL DEVELOPMENT

Kalymbet A. Kubekova S. Kapralova V. Lavrova S.
2026 University of Chemical Technology and Metallurgy

Journal of Chemical Technology and Metallurgy
2026 #61 Issue 1 183 - 190 pp.

This study explores the synthesis of sorption-active phosphate materials from manganese ore enrichment tailings of the Zhairem deposit. The initial tailings, predominantly composed of calcite (76.4 %), quartz (16.4 %), and braunite, were characterized by XRD and EPMA. Acid-thermal treatment with phosphoric acid followed by calcination at 200-800°C yielded calcium - manganese phosphate materials. Phase transformations were monitored via XRD, showing formation of crystalline phosphates at 200-600°C and a glassy phase at 800°C. The product synthesized at 600°C demonstrated the lowest water solubility (9.91 %), highest pore volume (0.175 cm³ g^-1), and optimal sorption capacity for Ni²⁺ (0.2934 mg-eq g^-1), which increased to 0.4697 mg-eq g^-1 after 0.4 wt. % of HCl activation. The enhanced performance is attributed to the formation of low-solubility polyphosphates and well-developed porous structures. SEM confirmed porous morphology at 600°C and denser, glassy structure at 800°C. The synthesized material showed no toxic elements such as Pb, Cd, or As, making it suitable for environmental applications. The findings indicate that Zhairem tailings are a promising raw material for producing effective sorbents for heavy metal removal, especially after acid activation. The optimal product is the calcium-manganese phosphate synthesized at 600°C.

ore enrichment wastes , silicophosphates , sorbents , structural analysis , technogenic raw materials

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Satbayev University, 22 Satbaev St., Almaty, 050013, Kazakhstan
University of Chemical Technology and Metallurgy, 8 Kliment Ohridski blvd., Sofia, 1797, Bulgaria

Satbayev University
University of Chemical Technology and Metallurgy

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