Mechanochemical Synthesis of Expanded Vermiculite with Urea for Filler into Alginate/Collagen Spherical Capsules: A Urea Slow-release System

Oliveira, Douglas Santos de; Jaerger, Silvia; Marangoni, Rafael

doi:10.17807/orbital.v13i2.1488

Cited by 2 publications

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“…Several investigations were carried out in the past to assess the fertilizer potential using diverse materials, which include nanocomposites, such as polymers [3,[19][20][21][22][23], clay minerals [23][24][25][26][27], or composites of synthetic and natural substances [28][29][30][31][32]. Compared to most synthetic products, clay minerals are cheap and easily available.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Activation of Smectite-Based Nanocomposites for Creation of Smart Fertilizers

et al. 2022

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This research presents the mechanical creation of smart fertilizers from a mixture of smectite and urea in a 3:2 ratio by using the planetary milling technique. The smectite–urea composites show intercalation between urea and mineral, which increases steadily with increasing activation time. A shift of X-Ray Diffraction basal reflections, intensities of Fourier transform infrared spectroscopy (FTIR) peaks, and weight losses in thermogravimetric analysis (TG) document the systematic crystallo-chemical changes of the composites related to nitrogen interaction with activation. Observations of the nanocomposites by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) corroborate the inference. Nitrogen intercalates with smectite in the interlayer space and remains absorbed either within micro-aggregates or on the surface of activated smectites. Soil leaching tests reveal a slower rate of nitrogen than that of traditional urea fertilizers. Different forms of nitrogen within the composites cause their differential release rates to the soil. The formulated nanocomposite fertilizer enhances the quality and quantity of oat yield.

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Section: Introductionmentioning

confidence: 99%

“…The "green" fertilizers are formulated by choosing an inhibitor or substrate and nutrients appropriately [2,24,[32][33][34][37][38][39][40][41]. Smectite is a useful "inhibitor" because of the high specific surface area caused by nano/micro-scale particles within it.…”

Section: Introductionmentioning

confidence: 99%