Shynar Saulebekkyzy
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Shynar Saulebekkyzy has a total of 19 co-authors. Here are the top co-authors by number of shared publications:
- Ainur Berkinbayeva
The Institute of Metallurgy and Ore Beneficiation, Satbayev University, Almaty 050013, Kazakhstan
6 shared publications - Bagdaulet Kenzhaliyev
Institute of Metallurgy and Ore Beneficiation, Satbayev University, Shevchenko Str., 29/133, Almaty 050010, Kazakhstan
6 shared publications - Kenzhegali Smailov
Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Shevchenko Str., 29/133, Almaty 050010, Kazakhstan
5 shared publications - Diana Karim
The Institute of Metallurgy and Ore Beneficiation, Satbayev University, Almaty 050013, Kazakhstan
4 shared publications - Azamat Yessengaziyev
The Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050013, Kazakhstan
3 shared publications - Zhazira Baltabekova
Institute of Metallurgy and Ore Beneficiation, Satbayev University, Shevchenko Str., 29/133, Almaty 050010, Kazakhstan
3 shared publications
Latest Publications
- Open Access
- 1 December 2026
- Published by WNGB Scientific Publishing House Sp. z o.o. in Journal of Ecological Engineering
- Vol. 27 (12) , 360-377
Cyanide speciation as the determinant of treatment performance: A critical review of removal, destruction and recovery routes for cyanide-bearing wastewater
Cyanide-containing wastewater is a multicomponent system: cyanide occurs as free cyanide, within weak acid dissociable (WAD) cyanide and stable metal-cyanide complexes, and alongside thiocyanate, metals and other impurities. The chemical form of cyanide and the composition of the aqueous matrix...
- 1 December 2026
- Published by WNGB Scientific Publishing House Sp. z o.o. in Journal of Ecological Engineering
- Vol. 27 (12) , 360-377
Open AccessCyanide speciation as the determinant of treatment performance: A critical review of removal, destruction and recovery routes for cyanide-bearing wastewater
Cyanide-containing wastewater is a multicomponent system: cyanide occurs as free cyanide, within weak acid dissociable (WAD) cyanide and stable metal-cyanide complexes, and alongside thiocyanate, metals and other impurities. The chemical form of cyanide and the composition of the aqueous matrix...
- Open Access
Sodium Percarbonate for Eco-Efficient Cyanide Detoxification in Gold Mining Tailings
Cyanide-containing effluents from hydrometallurgical gold extraction pose significant environmental risks due to their high toxicity. This study investigates the detoxification of cyanide-laden tailings from the Altyntau Kokshetau gold extraction facility (Kazakhstan) using sodium percarbonate in alkaline conditions. Employing response surface methodology (RSM) and central composite design (CCD), we optimized key parameters—pH (10–12), sodium percarbonate dosage (1.5–4.0 g), reaction time (10–40 min) and temperature (20–25 °C)—achieving 83.33% detoxification efficiency within 40 min and 99.99% after 8 h, reducing cyanide from 443.2 mg/L to 0.05 mg/L. The process follows biphasic pseudo-first-order kinetics ((k1 = 0.0517) min–1 initially, (k2 = 0.01665) min–1 subsequently), driven by HO• radical-mediated oxidation of to , as described by ). pH emerged as the dominant factor, optimizing radical stability and protonation (pKa ≈ 9.21) at pH 10. Infrared spectroscopy confirmed the presence of cyanide complexes (, ) in tailings, underscoring the need for effective treatment. The method ensures compliance with stringent environmental standards (e.g., ICMI limit of 0.2 mg/L), offering a scalable, eco-efficient solution for mitigating the environmental footprint of gold mining operations.Open AccessSodium Percarbonate for Eco-Efficient Cyanide Detoxification in Gold Mining Tailings
Cyanide-containing effluents from hydrometallurgical gold extraction pose significant environmental risks due to their high toxicity. This study investigates the detoxification of cyanide-laden tailings from the Altyntau Kokshetau gold extraction facility (Kazakhstan) using sodium percarbonate in alkaline conditions. Employing response surface methodology (RSM) and central composite design (CCD), we optimized key parameters—pH (10–12), sodium percarbonate dosage (1.5–4.0 g), reaction time (10–40 min) and temperature (20–25 °C)—achieving 83.33% detoxification efficiency within 40 min and 99.99% after 8 h, reducing cyanide from 443.2 mg/L to 0.05 mg/L. The process follows biphasic pseudo-first-order kinetics ((k1 = 0.0517) min–1 initially, (k2 = 0.01665) min–1 subsequently), driven by HO• radical-mediated oxidation of to , as described by ). pH emerged as the dominant factor, optimizing radical stability and protonation (pKa ≈ 9.21) at pH 10. Infrared spectroscopy confirmed the presence of cyanide complexes (, ) in tailings, underscoring the need for effective treatment. The method ensures compliance with stringent environmental standards (e.g., ICMI limit of 0.2 mg/L), offering a scalable, eco-efficient solution for mitigating the environmental footprint of gold mining operations. - Open Access
Microwave Pre-Treatment for Efficient Zinc Recovery via Acid Leaching
This study presents an innovative approach to processing refractory zinc-bearing clinker using microwave thermal treatment followed by acid leaching. Microwave irradiation induces phase transformations, converting sphalerite (ZnS) to zincite (ZnO), and generates microcracks that enhance clinker porosity and reactivity. These changes significantly improve zinc dissolution during sulfuric acid leaching. Key parameters—acid concentration, temperature, solid-to-liquid ratio, and leaching time—were optimized, achieving a zinc extraction of 92.5% under optimal conditions (40 g/L H2SO4, solid-to-liquid ratio 1:4, 600 °C, 5–7 min) compared to 39.1% without pre-treatment. Thermodynamic analysis confirms the higher reactivity of ZnO, driven by favorable Gibbs free energy and exothermic reaction characteristics. These findings demonstrate the potential of microwave processing to intensify hydrometallurgical processes, offering energy efficiency and environmental benefits for industrial zinc recovery.
Open AccessMicrowave Pre-Treatment for Efficient Zinc Recovery via Acid Leaching
This study presents an innovative approach to processing refractory zinc-bearing clinker using microwave thermal treatment followed by acid leaching. Microwave irradiation induces phase transformations, converting sphalerite (ZnS) to zincite (ZnO), and generates microcracks that enhance clinker porosity and reactivity. These changes significantly improve zinc dissolution during sulfuric acid leaching. Key parameters—acid concentration, temperature, solid-to-liquid ratio, and leaching time—were optimized, achieving a zinc extraction of 92.5% under optimal conditions (40 g/L H2SO4, solid-to-liquid ratio 1:4, 600 °C, 5–7 min) compared to 39.1% without pre-treatment. Thermodynamic analysis confirms the higher reactivity of ZnO, driven by favorable Gibbs free energy and exothermic reaction characteristics. These findings demonstrate the potential of microwave processing to intensify hydrometallurgical processes, offering energy efficiency and environmental benefits for industrial zinc recovery.
- Open Access
Investigation of Phase Transformations in Technogenic Raw Materials Under Microwave Treatment for Enhanced Zinc Leaching
This study presents the results of an investigation into the effectiveness of microwave (MW) treatment (1) as a preconditioning method for technogenic raw materials (2) to enhance zinc (3) leaching (4) efficiency. Selective dielectric heating facilitates phase transformations (5), converting sphalerite (ZnS) into zinc oxide (ZnO), which exhibits significantly improved acid leachability. The response surface methodology (RSM) was utilized to evaluate critical operational variables, encompassing sulfuric acid concentration, leaching period, slurry density, and thermal conditions. The obtained results confirm the potential of MW treatment in hydrometallurgical processes, offering a sustainable and energy-efficient alternative for processing technogenic raw materials.
Open AccessInvestigation of Phase Transformations in Technogenic Raw Materials Under Microwave Treatment for Enhanced Zinc Leaching
This study presents the results of an investigation into the effectiveness of microwave (MW) treatment (1) as a preconditioning method for technogenic raw materials (2) to enhance zinc (3) leaching (4) efficiency. Selective dielectric heating facilitates phase transformations (5), converting sphalerite (ZnS) into zinc oxide (ZnO), which exhibits significantly improved acid leachability. The response surface methodology (RSM) was utilized to evaluate critical operational variables, encompassing sulfuric acid concentration, leaching period, slurry density, and thermal conditions. The obtained results confirm the potential of MW treatment in hydrometallurgical processes, offering a sustainable and energy-efficient alternative for processing technogenic raw materials.
- Open Access
Innovative Methods for Intensifying the Processing of Zinc Clinker: Synergy of Microwave Treatment and Ultrasonic Leaching
This study presents an innovative approach to processing refractory zinc-bearing clinker through the synergistic application of microwave thermal treatment and ultrasonic-assisted leaching. Microwave irradiation induces phase transformations in the clinker, improving its reactivity and facilitating subsequent zinc dissolution, while ultrasonic cavitation enhances mass transfer by disrupting passivation layers. Key process parameters, including acid concentration, temperature, pulp density, and leaching time, were systematically investigated using response surface methodology (RSM) and central composite design (CCD). The results demonstrate that the optimized process conditions led to a significant increase in zinc recovery from refractory materials.
Open AccessInnovative Methods for Intensifying the Processing of Zinc Clinker: Synergy of Microwave Treatment and Ultrasonic Leaching
This study presents an innovative approach to processing refractory zinc-bearing clinker through the synergistic application of microwave thermal treatment and ultrasonic-assisted leaching. Microwave irradiation induces phase transformations in the clinker, improving its reactivity and facilitating subsequent zinc dissolution, while ultrasonic cavitation enhances mass transfer by disrupting passivation layers. Key process parameters, including acid concentration, temperature, pulp density, and leaching time, were systematically investigated using response surface methodology (RSM) and central composite design (CCD). The results demonstrate that the optimized process conditions led to a significant increase in zinc recovery from refractory materials.