Micronutrients encapsulation by starch as an enhanced efficiency fertilizer

Chiaregato, Camila Gruber; Faez, Roselena

doi:10.1016/j.carbpol.2021.118419

Cited by 23 publications

(11 citation statements)

References 77 publications

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“…The acronyms used to name the different formulations were PVA p : composed only with PVA and plasticizers (produced to evaluate the PVA plasticization); Macro: composed of PVA, plasticizers, and KNO 3 ; Micro: composed of PVA, plasticizers, and starch microspheres loaded with micronutrients; Micro s : composed of PVA, plasticizers, and micronutrients (pure salts); Multi: composed of PVA, plasticizers, KNO 3 , and starch microspheres loaded with micronutrients. The starch microspheres loaded with micronutrients were obtained using a laboratory-scale spray dryer (Büchi B-290 mini spray dryer), as previously described …”

Section: Methodsmentioning

confidence: 99%

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Plasticized Poly(vinyl alcohol)/Starch as a Nutrient Delivery System for Macro and Micronutrients

Chiaregato

Souza

Faez

2023

ACS Agric. Sci. Technol.

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Concerns about the environmental and economic impacts of agrochemical usage highlighted the importance of enhanced efficiency fertilizer materials to achieve the 2030 agenda for sustainable development. Therefore, we melt-processed a macro/micronutrient mono and multicomponent material based on poly(vinyl alcohol), KNO3, and starch/micronutrient (Mn, Fe, and Cu) microspheres. The Multimaterial presented a release reduction of 50 and 60% to K+ and NO3 –, respectively, compared to the Macromaterial, due to the external PVA layer, relaxation process, nutrient diffusion decrease, and ion competition (the presence of the micronutrient). In the soil release, the initial burst release occurred 12 days earlier for Multi and commercial material Basacote compared with the Macromaterial due to the presence of micronutrients. However, after 80 days of nutrient release in the soil, the materials still presented nutrients in the composition as determined by XRD, FTIR, and SEM-EDS analysis. Also, SEM images of the surface showed signs of deterioration, confirming their biodegradation potential over time and a similar release profile to the commercial material.

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Section: Methodsmentioning

confidence: 99%

“…The starch microspheres loaded with micronutrients were obtained using a laboratory-scale spray dryer (Buchi B-290 mini spray dryer), as previously described. 21 First, PVA was plasticized in a proportion of 70 wt % PVA and 30 wt % plasticizers. The 30 wt % corresponds to 15 wt % water and 15 wt % Gly.…”

Section: Introductionmentioning

confidence: 99%

Plasticized Poly(vinyl alcohol)/Starch as a Nutrient Delivery System for Macro and Micronutrients

Chiaregato

Souza

Faez

2023

ACS Agric. Sci. Technol.

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“…or are fabricated through complex production processes, add extra expense to the final product, and can be harmful if accumulated in the environment. In recent years, bio-based polymers such as alginate, 15,16 starch, [17][18][19][20] chitosan (CS), [21][22][23][24] polyhydroxybutyrate, 25 and cellulose 26,27 have been investigated to overcome these economic and environmental obstacles. Chitosan-based materials have garnered considerable attention due to their ability to interact with anionic species, 28,29 besides their known characteristics of biodegradability, [30][31][32] renewability at relatively low cost, 33 and non-toxicity.…”

Section: Introductionmentioning

confidence: 99%

Sugarcane Bagasse Fibers Derivatives and Their Application in Chitosan-Based Composite Films for NPK Fertilizer Release

Messa¹,

Contieri²,

Faez³

2023

J. Braz. Chem. Soc.

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Encapsulation and release of NPK fertilizer by composite films were systematically demonstrated by casting dispersions of chitosan (CS) and sugarcane bagasse (SCB) derivatives (holocellulose (HC), cellulignin (CL), and cellulose (CEL)) fibers under varied CS-to-NPK and CS-to-SCB derivatives mass ratios. SCB derivatives were obtained from sugarcane bagasse as agricultural waste by following the alkali dissolution (4% NaOH, 70 °C for 5 min), sodium chlorite delignification (1.4% NaClO2, pH 3.5, 70 °C, 5 h), or from a combination of both. Nutrientadsorption capacity can be tunable by the chemical composition of SCB derivatives, i.e., fibers with noncellulosics exhibited higher adsorption capacities while the absence of noncellulosics lessened their adsorption capacity. Oven-drying (60 °C, 5 h) of optimal 1:0.5 CS/NPK film‑forming solution produced highly uniform films with shape with 0.31 ± 0.02 mm thickness while increasing fiber content in the solution to 25 or 50% prevents films retraction effect. The release of highly watersoluble NPK fertilizer from these composite films was lower with hemicelluloses (52-82%) or lignin (55-92%) contents in SCB fiber than in noncellulosics absence (71-100%), thus could be tuned by varying the chemical composition SCB derivative, followed by a quasi-Fickian diffusion mechanism in water.

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“…Natural biopolymers such as starch, cellulose, and chitosan are favorable materials for the fabrication of controlled release carriers [2,[6][7][8][9][10] as they are renewable, cost-effective, low toxic, and abundantly available. Cellulose as the most abundantly available polysaccharide on earth has been extensively studied for fabrication of the microspheres, nanoparticles, lms and hydrogels for food and non-food applications [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Balang

Tay

Chin

et al. 2023

Preprint

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Background: Cellulose fibers extracted from printed paper wastes are utilized to synthesize spherical cellulose microspheres via water-in-oil microemulsion and precipitation methods. Span 80 was used as a surfactant and acetic acid as a precipitating agent in the microemulsion and precipitation process to obtain cellulose microspheres. The effects of synthesis conditions such as cellulose concentrations and drying techniques were observed to have profound effects on the surface morphology, particle sizes, and surface area of cellulose microspheres produced. Results: Spherical cellulose microspheres with particle sizes ranging from 5.2 to 9.3 µm were synthesized. Increasing cellulose concentrations led to larger particle sizes. Among various kinds of drying techniques, freeze-drying is the most preferable method for obtaining better yields of cellulose microspheres. The potential applications of the synthesized cellulose microspheres as controlled-release carriers for fertilizer in various soil types were evaluated. The larger particle sizes of cellulose microspheres have a smaller specific surface area, but with higher loading capacities and slower urea release. Conclusions: Our studies showed that the loading capacity and release profiles of urea could be tailored by modulating the mean particle sizes of the cellulose microspheres. Hence, cellulose microspheres demonstrated great potential to be utilized as sustainable controlled-release carriers for fertilizer.

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Micronutrients encapsulation by starch as an enhanced efficiency fertilizer

Cited by 23 publications

References 77 publications

Plasticized Poly(vinyl alcohol)/Starch as a Nutrient Delivery System for Macro and Micronutrients

Plasticized Poly(vinyl alcohol)/Starch as a Nutrient Delivery System for Macro and Micronutrients

Sugarcane Bagasse Fibers Derivatives and Their Application in Chitosan-Based Composite Films for NPK Fertilizer Release

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

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