5 results on '"Ibraeva, Kanipa"'
Search Results
2. Glauconite-Based Nanocomposites with Zn/Cu/B: Multifunctional Micronutrient Fertilizers.
- Author
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Khitrin, Ivan, Maximov, Prokopiy, Dasi, Evan, Ibraeva, Kanipa, Ponomarev, Konstantin, Maximova, Natalia, Belousov, Peter, Ruban, Alexey, and Rudmin, Maxim
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MICRONUTRIENT fertilizers ,ZINC sulfate ,ACTIVATION (Chemistry) ,GLAUCONITE ,COPPER ,OATS - Abstract
The full potential of glauconite-based nanocomposites as micronutrient fertilizers remains underexplored, particularly their interaction with Zn, Cu, and B. Despite the promising applications, the mechanisms of nutrient sorption and their effects on plant growth require further investigation, especially concerning structural changes and nutrient delivery efficiency. This study investigates the modification of glauconite with Zn, Cu, and B solutions to create multifunctional nanocomposites with enhanced properties. It was established that the activation process preserves the primary globular–lamellar morphology of glauconite while introducing structural changes. Nanocomposites were synthesized using chemical activation and characterized using XRD, SEM-EDS, TEM, FTIR, and BET analyses. Agrochemical tests evaluated their effects on oat growth under controlled conditions. Nanocomposites with zinc sulfate exhibited an increase in specific surface area and mesoporosity, enhancing sorption capacity and facilitating the formation of inner-sphere complexes on the mineral's basal surface. Modification with copper led to the formation of secondary phases, such as sulfates, on the surfaces of microflakes and globules while preserving the crystalline structure with inner-sphere coordination of Cu
2+ . Boron-modified nanocomposites were characterized by localized restructuring, pore channeling, and an increase in mesopore diameter, along with the formation of outer-sphere complexes relative to the basal surface of glauconite. Thermogravimetric and calorimetric analyses with mass spectrometry revealed specific endothermic and exothermic effects, particularly in Zn-modified samples, confirming changes in dehydration energetics. Agricultural tests on oats (Avena sativa) demonstrated the effectiveness of Cu- and B-modified nanocomposites in improving plant growth parameters, including a 7% increase in plant height and a 6.4% increase in dry weight. Zn-modified nanocomposites showed high germination rates (up to 100%) at low dosages but require optimization to avoid phytotoxicity at higher concentrations. The findings highlight the potential of adapting nanocomposites for targeted nutrient release. Additionally, glauconite nanocomposites have potential applications in restoring degraded soils, treating polluted runoff, and developing slow-release agrochemical systems. [ABSTRACT FROM AUTHOR] more...- Published
- 2025
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- View/download PDF
Catalog
3. Preparation, Features, and Efficiency of Nanocomposite Fertilisers Based on Glauconite and Ammonium Dihydrogen Phosphate.
- Author
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Rudmin, Maxim, Makarov, Boris, López-Quirós, Adrián, Maximov, Prokopiy, Lokteva, Valeria, Ibraeva, Kanipa, Kurovsky, Alexander, Gummer, Yana, and Ruban, Alexey
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GLAUCONITE ,AMMONIUM phosphates ,DIFFERENTIAL thermal analysis ,SCANNING electron microscopes ,TRANSMISSION electron microscopy ,POTASSIUM - Abstract
This paper studies the chemical and mechanochemical preparation of glauconite with ammonium dihydrogen phosphate (ADP) nanocomposites with a ratio of 9:1 in the vol.% and wt.%, respectively. The methods include X-ray diffraction analysis, scanning electron microscope with energy-dispersive X-ray spectroscopy, transmission electron microscopy, infrared spectroscopy, and differential thermal analysis with a quadruple mass spectrometer. The manufactured nanocomposites keep the flaky glauconite structure. Some glauconite unit structures have been thickened due to minimal nitrogen (ammonium) intercalation into the interlayer space. The globular, granular, or pellet mineral particles of nanocomposites can be preserved via chemical techniques. Globular and micro-aggregate particles in nanocomposites comprise a thin film of adsorbed ADP. The two-step mechanochemical method makes it possible to slightly increase the proportion of adsorbed (up to 3.2%) and intercalated (up to 6.0%) nutrients versus chemical ways. Nanocomposites prepared via chemical methods consist of glauconite (90%), adsorbed (1.8–3.6%), and intercalated (3.0–3.7%) substances of ADP. Through the use of a potassium-containing clay mineral as an inhibitor, nitrogen, phosphorus, and potassium (NPK), nanocomposite fertilisers of controlled action were obtained. Targeted and controlled release of nutrients such as phosphate, ammonium, and potassium are expected due to various forms of nutrients on the surface, in the micropores, and in the interlayer space of glauconite. This is confirmed via the stepwise dynamics of the release of ammonium, nitrate, potassium, and phosphate from their created nanocomposites. These features of nanocomposites contribute to the stimulation of plant growth and development when fertilisers are applied to the soil. [ABSTRACT FROM AUTHOR] more...
- Published
- 2023
- Full Text
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4. Intercalation of carbamide to globular glauconite by chemical processing for the creation of slow-release nanocomposites.
- Author
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Rudmin, Maxim, Maximov, Prokopiy, Dasi, Evan, Kurovsky, Alexander, Gummer, Yana, Ibraeva, Kanipa, Kutugin, Victor, Soktoev, Bulat, Ponomarev, Konstantin, Tararushkin, Evgeny, Makarov, Boris, and Ruban, Alexey more...
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GLAUCONITE , *CHEMICAL processes , *NANOCOMPOSITE materials , *MONTMORILLONITE , *ACTIVATION (Chemistry) , *SOIL mineralogy , *SMECTITE - Abstract
This article investigates the intercalation of carbamide within globular glauconite involving the chemical activation of glauconite with carbamide solution-gel at varying concentrations of total nitrogen (N). Mineral nanocomposites were prepared with a multitude of novel functions. As the N concentration of the initial solution increased, the proportion of intercalated N enhanced to 8%. A 20% of N concentration in carbamide solution maximizes intercalation. Intercalation occurs in the interlayer of smectite layers (micropores) in glauconite. In nanocomposites, the decrease in specific surface space, total volume pores, and average pore size reflect the absorption of carbamide in meso- and macropores of glauconite globules. Glauconite nanocomposites retain a spherical particle morphology and a distinct microlayer close to the surface. The increased proportion of nitrogen in the microlayers close to the surface indicates a high filtration capacity of the globules. The near-surface microlayer serves as a diffusion channel for the glauconite interior, where new substances are absorbed in the micro- (interlayer) and macropores. The stepwise kinetics of nutrient release, which supports the various forms of carbamide absorption in glauconite, distinguishes the nanocomposites. In addition to N-compounds, glauconite nanocomposites are mineral sources of the available potassium (K) in soils. As a result, chemically manufactured glauconite nanocomposites have some following advantages: the micro-granular mineral form, a permeable inner near-surface microlayer, incubated in micro-, meso-, and macropores N-compounds, and the available K. [Display omitted] • Nitrogen intercalation occurs in the interlayer spaces (micropores) of smectite layers of glauconite. • Adsorbed carbamide in meso- and macropores is reflected in decreased specific surface area, total volume, and pore sizes. • Studied glauconite nanocomposites keep globular morphology and a distinctive near-surface microlayer. • The surface micro-layer performs a solute-supplying function for the core part of glauconite globules. • The nanocomposites have a stepwise pattern of nutrient release. [ABSTRACT FROM AUTHOR] more...
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- 2023
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5. Formulation of a slow-release fertilizer by mechanical activation of smectite/glauconite and urea mixtures.
- Author
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Rudmin, Maxim, Banerjee, Santanu, Yakich, Tamara, Tabakaev, Roman, Ibraeva, Kanipa, Buyakov, Ales, Soktoev, Bulat, and Ruban, Aleksey
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UREA as fertilizer , *UREA , *PLANETARY rings , *FERTILIZERS , *PLANETARY interiors , *NITROGEN in soils , *MONTMORILLONITE - Abstract
This study demonstrates the formulation of slow-release fertilizers by the mechanical activation of a mixture of powdered clays and urea in the ratio 2:3, using planetary or ring milling techniques. The activation produces micro-aggregates of composites with intercalated clay and urea and is rimmed by the latter. Smectite-urea and glauconite-urea mixture shows an intercalation between urea and clay from the beginning of activation. A shift of X-Ray Diffractional parameters and the intensities of FTIR peaks record the systematic structural changes of the composites with increasing duration of activation. The maximum intercalation of clays and urea requires operation times of 20 and 60 min in planetary and ring mills, respectively. The external urea forms a uniform coating around the intercalated structure using the planetary mill, and it keeps on growing as the operation time increases. Therefore, this investigation reveals the optimum activation conditions for the formation of composites with layered structures. While the direct application of urea releases nitrogen to the soil at a fast rate, the resulting composites are likely to liberate the nutrient at a slow rate. Additionally, the composites made from a mixture of glauconite and urea releases potassium at a slow rate. The resultant composites meet the criteria of multifunctional slow-release fertilizers. Unlabelled Image • The mechanical activation of mixtures forms micro-aggregates with the intercalation of urea and clays at the core. • Nitrogen coating appears during preparation in ring mill. • The composites develop nitrogen encapsulation for 20 or 60 min of activation in planetary or ring mill. • The resulting composites have the potential of SRF with several useful functions. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
- Full Text
- View/download PDF
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