Formulation and characterization of water retention and slow-release urea fertilizer based on Borassus aethiopum starch and Maesopsis eminii hydrogels

Gungula, D. T.; Andrew, Fartisincha P.; Joseph, Japari; Kareem, Semiu Adebayo; Barminas, J. T.; Adebayo, Elizabeth F.; Saddiq, A. M.; Tame, V. T.; Dere, Idayatu; Ahinda, Wamarhyel J.; Ator, Reuben

doi:10.1016/j.rinma.2021.100223

Cited by 17 publications

(9 citation statements)

References 31 publications

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“…In our continuous effort [ 38 ] to design materials that can effectively deliver urea to plants in a controlled manner, we present here the synthesis of SRF hydrogel based HPMC/PVA/Glycerol with blended paper as the second layer. Furthermore, the effects of the blended paper on release, swelling and water retention in soil were investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Slow-Release Fertilizer Hydrogel Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper

Kareem

Dere

Gungula

et al. 2021

Gels

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In this study, biodegradable slow-release fertilizer (SRF) hydrogels were synthesized from hydroxyl propyl methyl cellulose (HPMC), polyvinyl alcohol (PVA), glycerol and urea (SRF1) and HPMC, PVA, glycerol, urea and blended paper (SRF2). The fertilizer hydrogels were characterized by SEM, XRD and FTIR. The swelling capacity of the hydrogels in both distilled and tap water as well as their water retention capacity in sandy soil were evaluated. The hydrogels had good swelling capacity with maximum swelling ratio of 17.2 g/g and 15.6 g/g for SRF1 and SRF2 in distilled, and 14.4 g/g and 15.2 g/g in tap water, respectively. The water retention capacity of the hydrogels in sandy soil exhibited higher water retention when compared with soil without the (SRFs). The soil with the hydrogels was found to have higher water retention than the soil without the hydrogels. The slow-release profile of the hydrogels was also evaluated. The result suggested that the prepared fertilizer hydrogels has a good controlled release capacity. The blended paper component in SRF2 was observed to aid effective release of urea, with about 87.01% release in soil at 44 days compared to the pure urea which was about 97% release within 4 days. The addition of blended paper as a second layer matrix was found to help improve the release properties of the fertilizer. The swelling kinetic of the hydrogel followed Schott’s second order model. The release kinetics of urea in water was best described by Kormeye Peppas, suggesting urea release to be by diffusion via the pores and channels of the SRF, which can be controlled by changing the swelling of the SRF. However, the release mechanism in soil is best described by first order kinetic model, suggesting that the release rate in soil is depended on concentration and probably on diffusion rate via the pores and channels of the SRF.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Slow-Release Fertilizer Hydrogel Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper

Kareem

Dere

Gungula

et al. 2021

Gels

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“…Biopolymers attracted lot of attention recently because of their non-toxicity and biodegradability but they have inherent shortcoming of being hydrophilic in nature which needs further modification for slow release of nutrients. Gungula et al 32 prepared hydrogels by incorporating urea into Borassus aethiopum starch and Maesopsis eminii starch by using borax as binding material which is not ecofriendly. The nitrogen release efficiency (NSE) of prepared hydrogels was also higher than the minimum criteria in first 24 h. Although many natural polymers based slow-release fertilizers have shown excellent nutrient release behavior, the coating method (spray coating in rotary drum) requires organic solvent which not only enhances the capital and recovery cost of solvent but also poses threat to the environment.…”

Section: Comparison Of Newly Developed and Other Coated Ureamentioning

confidence: 99%

Synthesis and performance evaluation of slow-release fertilizers produced from inverse vulcanized copolymers obtained from industrial waste

et al. 2023

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“…Gungula et al were able to propose starch-based hydrogels by encapsulating urea into biopolymers and using borax as a binder. 94 The peculiarity of this solution, however, is that the biopolymers employed are derived from plant-based sources namely Borassus aethiopum (BA) and Maesposis eminii (ME). Both BAS-SRF and ME-SRF showed similar effects on the water retention behavior of the soil.…”

Section: Starchmentioning

confidence: 99%

“…In the case of neat urea, the release is almost instantaneous and complete in few minutes in water, while the release occurs in less than one day in a soil environment. Gungula et al were able to propose starch-based hydrogels by encapsulating urea into biopolymers and using borax as a binder …”

Section: Polymers For Urea Controlled Releasementioning

confidence: 99%

Biobased Materials as Promising Tools for the Slow-Release of Urea

Magaletti,

Pizzetti,

Masi

et al. 2023

ACS Agric. Sci. Technol.

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Formulation and characterization of water retention and slow-release urea fertilizer based on Borassus aethiopum starch and Maesopsis eminii hydrogels

Cited by 17 publications

References 31 publications

Synthesis and Characterization of Slow-Release Fertilizer Hydrogel Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper

Synthesis and Characterization of Slow-Release Fertilizer Hydrogel Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper

Synthesis and performance evaluation of slow-release fertilizers produced from inverse vulcanized copolymers obtained from industrial waste

Biobased Materials as Promising Tools for the Slow-Release of Urea

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