Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release

Silva, I. A.; Silva, D. S.; Sousa, Matheus Urtiga; Menezes, Romualdo Rodrigues; Ferreira, H. S.; Neves, G. A.

doi:10.1007/s10098-020-01967-z

Cited by 7 publications

(2 citation statements)

References 66 publications

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“…The key components of CRF are nutrients (often ammonium or phosphates) and inhibitory substances [ 27 , 32 , 33 ]. Various polymers [ 25 , 34 , 35 , 36 , 37 ], organic materials [ 22 , 28 , 38 , 39 , 40 ], minerals [ 41 , 42 , 43 , 44 , 45 , 46 ], and heterogeneous substances [ 44 , 47 , 48 , 49 , 50 , 51 ] can inhibit nutrients in the CRF. Clay minerals (phyllosilicates) are common inorganic materials in the creation slow-release fertilisers [ 41 , 45 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Features, and Efficiency of Nanocomposite Fertilisers Based on Glauconite and Ammonium Dihydrogen Phosphate

Rudmin,

Makarov,

López-Quirós

et al. 2023

Materials

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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.

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Section: Introductionmentioning

confidence: 99%

Preparation, Features, and Efficiency of Nanocomposite Fertilisers Based on Glauconite and Ammonium Dihydrogen Phosphate

Rudmin,

Makarov,

López-Quirós

et al. 2023

Materials

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“…The simplest method is to encapsulate them in a grafted polymer matrix, such as polylactic acid, 12 chitosan, 13 montmorillonite, 14 bentonite, 15 etc. Another approach is to coat fertilizers with biodegradable polymer coatings: maleic anhydride, 16 polyurethane, 17 polyvinyl acetate, 18 organic clay composite, 19 gypsum, and starch, 20 carboxymethyl cellulose, 21 plant-derived materials, 22 and so on. Compared to encapsulating fertilizers inside polymers, coating fertilizers is a complex process and cumbersome; although fertilizer encapsulation technology has great potential for application and a lot of research has been done on hydrogel encapsulation, most of the slow-release hydrogels lose the original high water absorption characteristics of hydrogels.…”

Section: ■ Introductionmentioning

confidence: 99%

Waste Cabbage-Integrated Nutritional Superabsorbent Polymers for Water Retention and Absorption Applications

et al. 2022

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To alleviate soil impoverishment and water shortage in desert areas, as well as to reduce the impact of waste cabbage on the environment and human health, we used waste cabbage as a substrate, 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) and acrylic acid (AA) as polymerization units, and NH4Cl and KNO3 as nutriment to obtain two waste cabbage-superabsorbent polymers (CB-SAPNH4Cl and CB-SAPKNO3) by the one-pot method. The chemical structure, thermal stability, and morphology of the polymers were investigated by Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and scanning electron microscope (SEM). Meanwhile, the water retention, water absorption, and salt resistance were compared with the purchased polymers. The results showed that the nutriment was successfully encapsulated inside the polymer, and CB-SAPNH4Cl and CB-SAPKNO3 at 1% nutrient concentration showed excellent water retention properties, salt resistance, and water absorption performance of 1546 and 1131 g/g (distilled water), 306 and 277 g/g (tap water), and 116 and 91 g/g (0.9% NaCl solution). Therefore, they are highly promising materials for the application.

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Enhanced-efficiency urea fertilizers from organic palygorskite and carnauba wax

Fernandes,

Serafim,

Rodrigues

et al. 2024

Clean Techn Environ Policy

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Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release

Cited by 7 publications

References 66 publications

Preparation, Features, and Efficiency of Nanocomposite Fertilisers Based on Glauconite and Ammonium Dihydrogen Phosphate

Preparation, Features, and Efficiency of Nanocomposite Fertilisers Based on Glauconite and Ammonium Dihydrogen Phosphate

Waste Cabbage-Integrated Nutritional Superabsorbent Polymers for Water Retention and Absorption Applications

Enhanced-efficiency urea fertilizers from organic palygorskite and carnauba wax

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