The Role of Medium Condition for Uranium Separation from Central Kyzylkum’s Low-grade Phosphorite after Sulfuric Acid Treatment

Ilhom Tagayev, Nodirjon Doniyarov, Anvar Asrorov, Islom Murodov


This article presents the results of separating radioactive elements, particularly uranium, from low-grade phosphorites of the Central Kyzylkum by low concentrated sulfuric acid solution, which is practically feasible at the Kyzylkum phosphorite combine (KPC). In world practice, uranium was extracted from phosphorite ore in the countries of the Middle East (Syria, Morocco, Algeria, Egypt) at the final stages of obtaining phosphorus fertilizers at metallurgical and chemical plants. The extraction of uranium from phosphorite ore is not practiced in Uzbekistan. The proposed method is fundamentally different from the above and is recommended to be applied at the initial stage of enrichment phosphorite ores in the enrichment plants. Studies have shown that the uranium completely passed into solution by treating phosphorite ore with weak concentrated sulfuric acid solution. Analyses of solution and sediment composition showed that the useful component, P2O5, remained in the sediment, increasing from 8.69% to 10.3%, while uranium passed into the solution with alkaline salts alkaline-earth elements. To obtain a finished product, the resulting enriched solution was added to the richer phosphorite ore. When performing the above processes, the pH of the medium was kept at the neutral level, which is of great practical importance for the implementation of this method with minimal economic costs using conventional inventory, corrosion resistance, and environmentally friendly phosphorus fertilizer.


Francolite; pH medium; filtration; sorbtion; extracting; sediments; fertilizers.

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M.S. Gasser, Sh.Sh. Emam, S.E. Rizk, B.A. Salah, S.A. Sayed, H.F. Aly, “Extraction and separation of uranium (IV) and certain light lanthanides from concentrated phosphoric acid solutions using octyl phenyl acid phosphate,†Jour. Mol. Liq., №.272, pp. 1030–1040, 16, Oct. 2018.

M. Montaser, “ Application of UNFC-2009 to Phosphorites - Uranium Resources,†Case Study of El Sebaya Projects, Nile Valley, Egypt, pp. 18, 16, Apr. 2016.

I. Tagaev, N. Doniyarov, A. Asrorov, I. Murodov, N.KH. Usanbaev, U. Temirov, “Distinctive IR-Spectroscopic Features of Functional Groups of LowGrade Phosphorites After Microbiological and Acid Processing,†IDEAS SPREAD: Land Science, Vol. 2, № 1, pp. 43-54, 2020.

I. N. Murodov, I. A. Tagayev, “The central Kysylkum phosphorites' origin character and conditions of determination of rare earth elements and uranium in them,†XVI Int. For. Topical issues of rational use of natural resourses, Vol. 1, Saint-Petersburg, Russia, pp. 250-251, 2020.

N.A. Doniyarov, I.A. Tagaev, I.N. Murodov, A.A. Asrorov, “Development of technology for obtaining phosphoric fertilizer of high quality, purified from ballistic impurities,†Mining Bulletin of Uzbekistan, №. 2 (77), pp. 68-70, Jun. 2019.

L. Botvinnik at all., “Recovery of uranium from Philippine wet phosphoric acid using D2EHPA-TOPO solvent extraction,†Philippine J. of Science, Vol. 147, № 2, pp. 275-284, Jun. 2018.

Y. Hu et al., “Superior sorption capacities of Ca-Ti and Ca-Al bimetallic oxides for U(VI) from aqueous solutions,†Chem. Eng. J., Vol. 316, pp. 419–428, 15, May 2017. DOI:

J. Jin et al., “HNO3 modified biochars for uranium (VI) removal from aqueous solution,†Bioresource Technoly 256, pp. 247–253, 07, Feb. 2018.

Y. Sun et al., 2017. “Interaction of sulfonated graphene oxide with U(VI) studied by spectroscopic analysis and theoretical calculations,†Chem. Eng. J. Vol. 310, Part 1, pp. 292-299, 15, Feb. 2017. DOI:

E. Bağda, M. Tuzen, A. Sari, “Equilibrium, thermodynamic and kinetic investigations for biosorption of uranium with green algae (Cladophorahutchinsiae),†J. Environ. Radioact, Vol.175–176, pp. 7-14, Sep. 2017. DOI:

S. Liu et al., “Recovery of uranium(VI) from aqueous solution by 2-picolylamine functionalized poly(styrene-co-maleic anhydride) resin,†J. Colloid Interface Sci. Vol. 497, pp. 385–392, 1, Jul. 2017. DOI:

D. Yang at al., â€Rational design and synthesis of monodispersed hierarchical SiO2@ layered double hydroxide nanocomposites for efficient removal of pollutants from aqueous solution,†Chem. Eng. J. Vol. 323, pp. 143–152, 1, Sep. 2017. DOI:

F. Yuan at al., “Synthesis of phytic acid-decorated titanate nanotubes for high efficient and high selective removal of U(VI),†Chem. Eng. J. Vol. 322, pp. 353–365, 15, Aug. 2017. DOI:

S.T. Jadhav,â€Sorption of uranium from alkaline waste onto radiation grafted phosphoryl-g- Teflon matrix,†J. Radioanal. Nucl. Chem. Vol. 312, pp. 413–419, 31, Mar. 2017. DOI:

F. Li at al., “ Functionalized hydrothermal carbon derived from waste pomelo peel as solid-phase extractant for the removal of uranyl from aqueous solution,†Environ. Sci. Pollut. Res. Vol. 24, pp. 1–11, 11, Aug. 2017. DOI:

X. Zheng at al., â€Effect of pH on uranium(VI) biosorption and biomineralization by Saccharomyces cerevisiae,†Chemosphere, Vol. 203, pp. 109–116, Jul. 2018. DOI:

H. Wen, Z. Pan, D. Giammar, L. Li, “Enhanced uranium immobilization by phosphate amendment under variable geochemical and flow conditions: insights from reactive transport modeling,†Environ. Sci. Technol. Vol. 52, № 10, pp. 5841–5850б 12, Apr. 2018, DOI:

J. Li at al., “Direct extraction of U(VI) from alkaline solution and seawater via anion exchange by metal-organic framework,†Chem. Eng. J. Vol. 316, pp. 154–159, May 2017. DOI:

J. Li at al., “Metalorganic framework-based materials: superior adsorbents for the capture of toxic and radioactive metal ions,†Chem. Soc. Rev. Vol. 47, pp. 2322–2356, 02, Mar. 2018. DOI:

N.A. Doniyarov, I.A. Tagaev, I.N. Murodov, A.A. “Asrorov, Features of the destruction of minerals of low-grade phosphorites of the central kyzylkum by neutrophilic heterotrophic microorganisms of activated sludge,†Mining Bulletin of Uzbekistan, №. 3 (78), pp. 70-74, Sep. 2019.

T. Nurmurodov, S. Farmonova, N. Khurramov, E. Utamurodov, “Investigation of cleaning extraction phosphoric acid obtained from phosphorites of Central Kyzylkums,†Universum: Technical Science, №7(52), Jul. 2018.

N.I. Khurramov, T.I. Nurmurodov, N.N. Bozorova, Z.U. Karimova, “Study of reological properties of solutions and slurries formed in the process of obtaining dicalcium phosphate,†Chemical technology: Control and management, №.3, pp.5-10, 2020.

B.E. Sultanov, Z.M. Tursunova, Sh.S. Namazov, A.U. Erkaev, B.M. Beglov, “Effect of calcium nitrate solution concentration on the level of leaching of Central Kyzylkum phosphorite concentrates,†Uzbekistan Chemistry Journal, № 4, pp. 10-13, 2002.

U.K. Alimov, A.M. Reimov, Sh.S. Namazov, B.M. Beglov, “The insoluble part of phosphorus fertilizers, obtained by processing of phosphorites of central kyzylkum with partially ammoniated extraction phosphoric acidâ€, Rus. J. Applied Chemistry, â„– 3 (83), pp. 545–552, May 2010. DOI:

G.I. Avdonin, V.A. Gurov, M.Yu. Mamoshin, V.S. Pikalova, “An estimate of uranium recovery from phosphorite ores,†Prospect and protection of mineral resources, №12, pp. 48-55, 2017.

A.U. Erkaev, Kh.Ch. Mirzakulov, Sh.S. Namazov, “Density and viscosity of ammoniated suspensions of Fluorine-containing Precipitate in wet-process phosphoric acid,†Rus. J. Applied Chemistry, № 6 (69), pp. 798–802, Jun. 1996.

Mineral fertilizers. Methods of determination of phosphates, State Standard 20851, 1975.

“Method for the determination of trace elements in diagnosed biosubstrates by inductively coupled plasma mass spectrometry (isp-ms)†Guidelines. Ministry of Health, Russia, Moscow 2003.

S. Aghaeian, A. Ferdowsi, H. Yoozbashizadeh, “Extraction of lanthanides from apatite concentrate by hemihydrate-dihydrate process via sulfuric acidâ€, Int. Conf. on Materials Science and Metallurgy, Shiraz University, Nov. 8-9, 2016.



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