PRODUCTION OF ORGANO-MINERAL FERTILIZING AMELIORANTS BASED ON PHOSPHOGYPSUM, CENTRAL KYZYLKUM PHOSPHORITES AND BIOHUMUS

Authors

• Temur A. OSPANOV, Karakalpak State University, Nukus, UzbekistanFollow
• Axmed M. REYMOV, Karakalpak Branch of the Academy of Sciences of the Republic of Uzbekistan, Nukus, UzbekistanFollow
• Rashid K. KURBANIYAZOV, Karakalpak State University, Nukus, UzbekistanFollow
• Jaxanger M. BISENBAEV, Karakalpak State University, Nukus, UzbekistanFollow

Abstract

Phosphogypsum, a large-scale industrial by-product generated during phosphoric acid production, poses significant environmental challenges due to its accumulation and potential ecological impact. This study investigates the utilization of phosphogypsum as a raw material for producing fertilizing ameliorants in combination with Central Kyzylkum phosphorites and biohumus. Composite mixtures were prepared and granulated using a 30% ammonium sulfate solution as a binding agent. The chemical composition, phase structure (XRD), and microstructure (SEM–EDS) of the obtained materials were analyzed. The results demonstrate the formation of calcium phosphate and sulfate phases, including CaHPO4·2H2O, β-Ca3(PO4)2, and CaSO4·2H2O, which contribute to both fast- and slow-release nutrient properties. The addition of biohumus improved the biological activity and structural properties of the materials. The optimal composition (phosphogypsum : phosphorite : biohumus = 1 : 1 : 0.5) showed enhanced agronomic characteristics, including improved available phosphorus content and granule strength.

Recommended Citation

OSPANOV, Temur A.; REYMOV, Axmed M.; KURBANIYAZOV, Rashid K.; and BISENBAEV, Jaxanger M. (2026) "PRODUCTION OF ORGANO-MINERAL FERTILIZING AMELIORANTS BASED ON PHOSPHOGYPSUM, CENTRAL KYZYLKUM PHOSPHORITES AND BIOHUMUS," CHEMISTRY AND CHEMICAL ENGINEERING: Vol. 2026: No. 2, Article 6.
DOI: https://doi.org/10.70189/1992-9498.1718
Available at: https://cce.researchcommons.org/journal/vol2026/iss2/6