Extraction of P₂O₅ from the mineralized mass of the Central Kyzylkum using  acidic wastewater generated from cotton soapstock processing: scientific analysis based on equilibrium principles

U.S. Baltayev; S.X. Shamuratov; U.K. Alimov; A.E. Madaminov; M.E. Jabbarov

doi:10.31643/2027/6445.20

Authors

U.S. Baltayev Urgench State University named after Abu Rayhan Biruni
S.X. Shamuratov Urgench State University named after Abu Rayhan Biruni
U.K. Alimov Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan
A.E. Madaminov Urgench State Pedagogical Institute
M.E. Jabbarov Non-government Educational Institution Mamun University

DOI:

https://doi.org/10.31643/2027/6445.20

Keywords:

Acidic wastewater, Central Kyzylkum mineralized mass, Ionic equilibrium, Mathematical modeling, Phosphorus pentoxide (P₂O₅), Photometric analysis, Solid-phase reaction.

Abstract

This study explores the prospects of extracting phosphorus pentoxide (P₂O₅) from the mineralized mass of the Central Kyzylkum region using acidic wastewater (AWW) derived from cottonseed soapstock processing. The acidic components within the AWW were found to facilitate the decomposition of solid-phase phosphorite material. Experiments were conducted at 333 K under varying AWW-to-mineralized mass (AWW:MM) ratios ranging from 100:10 to 100:40. The concentration of P₂O₅ was determined using a photometric method at a wavelength of 440 nm. The research was based exclusively on the analysis of the solid phase, where the extent of the reaction was assessed through the quantity of precipitate formed. It was demonstrated that an increase in pH had a direct effect on P₂O₅ extraction. The reduction in CaO content followed an exponential trend, while the P₂O₅ release exhibited a logarithmic relationship with pH. The equilibrium reactions between ions were interpreted within the framework of chemical mechanisms. Experimental results were expressed through graphical analysis and regression modeling using OriginPro 2021. The obtained data were mathematically modeled with high reliability, as indicated by coefficients of determination (R²) exceeding 0.95. This approach offers a cost-effective, waste-based alternative technological method for phosphorus extraction, utilizing industrial by-products while maintaining environmental and economic feasibility.

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Author Biographies

U.S. Baltayev, Urgench State University named after Abu Rayhan Biruni

Candidate of Technical Sciences, doctoral student in the Faculty of Chemical Technologies, Urgench State University named after Abu Rayhan Biruni, 220100, H. Olimjon Street 14, Urgench, Uzbekistan. ORCID ID: https://orcid.org/0009-0004-5636-3318

S.X. Shamuratov, Urgench State University named after Abu Rayhan Biruni

Doctor of Philosophy in Technical Sciences, Associate Professor at the Faculty of Chemical Technology, Urgench State University named after Abu Rayhan Biruni, 220100, H. Olimjon Street 14, Urgench, Uzbekistan. ORCID ID: https://orcid.org/0000-0002-1040-1807

U.K. Alimov, Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan

Doctor of Technical Sciences, leading scientific researcher at the Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, 100170, Mirzo Ulugbek, 77, Tashkent, Uzbekistan. ORCID ID: https://orcid.org/0000-0001-5608-5304

A.E. Madaminov, Urgench State Pedagogical Institute

Doctor of Philosophy in Pedagogical Sciences, Associate Professor in the Faculty of Natural and Applied Sciences, Urgench State Pedagogical Institute, 220100, Gurlan str, 1-A, Urgench city, Uzbekistan. ORCID ID: https://orcid.org/0000-0002-3482-8071

M.E. Jabbarov, Non-government Educational Institution Mamun University

Non-government Educational Institution Mamun University, Khiva, Uzbekistan. ORCID ID: https://orcid.org/0009-0001-5987-0057

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