scholarly journals Synthesis and Characterization of Slow-Release Fertilizer Hydrogels Based on Hydroxy Propyl Methyl Cellulose, Polyvinyl Alcohol, Glycerol and Blended Paper as Second Layer

2021 ◽  
Author(s):  
Fartisincha Peingurta Andrew ◽  
Daniel T Gungula ◽  
Semiu A Kareem ◽  
Abdullahi M Saddiq ◽  
Esther F Adebayo ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Slow Release ◽  
Tap Water ◽  
Release Kinetics ◽  
Methyl Cellulose ◽  
Release Behavior ◽  
Order Model ◽  
Swelling Kinetic ◽  
Slow Release Urea

In this study, a slow-release urea fertilizer hydrogel was synthesized from hydroxyl propyl methyl cellulose, polyvinyl alcohol and glycerol blends with paper (blended paper) as second layer. The fertilizer hydrogel was characterized by SEM, XRD and FTIR. Its retention in sandy soil, swelling behavior in distilled and tap water as well as slow-release behavior to urea were investigated. The results indicated that the fertilizer had good slow-release properties and ability to retain water in soil. However, 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 the Schott’s Second order model. The release kinetics of urea in water was best described by the Zero order model signifying that the release behavior was independent of fertilizer concentration

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

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 262
Author(s):  
Semiu A. Kareem ◽  
Idayatu Dere ◽  
Daniel T. Gungula ◽  
Fartisincha Peingurta Andrew ◽  
Abdullahi M. Saddiq ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Sandy Soil ◽  
Water Retention ◽  
Slow Release ◽  
Tap Water ◽  
Methyl Cellulose ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Slow Release Fertilizer ◽  
Swelling Capacity

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.

The Effect of pH in the Tap Water on Nutrient Release from Slow Release Fertilizers

2014 ◽  
Vol 931-932 ◽  
pp. 754-757
Author(s):  
Jittrera Buates ◽  
Petchporn Chawakitchareon ◽  
Rewadee Anuwattana
Keyword(s):  
Slow Release ◽  
Tap Water ◽  
Nutrient Release ◽  
Release Behavior ◽  
Release Formulation ◽  
Total N ◽  
Nutrient Contents ◽  
Scientific Methods ◽  
N Release ◽  
Slow Release Fertilizers

The objective of this research is to study the nutrient release behaviors on slow release fertilizer (Osmocote® N13:P13:K13, 3 month release formulation). The fertilizer was added into distilled water which adjusted pH of 6.5 and 7.5. The nutrient release behaviors were determined by collecting samples every 1 week and analyzed the nutrient contents in samples by scientific methods. As the result, for the total N release behavior, it may be considered that at lower pH condition tended to release more than that at higher one, for the P (shown by P2O5) and K (shown by K2O) release behaviors may be high at high pH condition.

scholarly journals Characterization of Alginate-Cellulose-Kaolin Composites for Slow-Release Urea Fertilizer

2021 ◽  
Vol 8 (3) ◽  
pp. 219-227
Author(s):  
Sunardi Sunardi ◽  
Gusti Nia Faramitha ◽  
Uripto Trisno Santoso
Keyword(s):  
Slow Release ◽  
Aqueous Media ◽  
Entrapment Efficiency ◽  
Swelling Ratio ◽  
Release Agent ◽  
Urea Fertilizer ◽  
Wet Condition ◽  
Slow Release Urea ◽  
Cie Lab

Research on the effect of cellulose and kaolin addition to alginate-cellulose-kaolin composites' characteristics as a slow-release agent of urea fertilizer has been done. The technique used in composites' preparation is an extrusion technique using 2% CaCl2 solution as a cross-linker. The compositions of alginate-cellulose-kaolin were varied to determine their effect on composites' characteristics such as diameter, color, swelling ratio, entrapment efficiency, and release of urea. The results showed that the diameter of beads in wet condition produced ranges from 2.98 to 3.54 mm, whereas the diameter of dry beads ranges from 1.22 to 1.92 mm. The addition of cellulose and kaolin affected the color of the beads produced based on CIE Lab analysis. The value of the swelling ratio decreased with the addition of cellulose and kaolin. The entrapment efficiency of urea in beads obtained ranged from 37.25 to 45.06%. The release of urea in aqueous media showed that cellulose and kaolin's addition into the alginate affected the amount of released urea.

Characterization of p(AA-co-AM)/bent/urea and its swelling and slow release behavior in a simulative soil environment

2015 ◽  
Vol 133 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Peng Wen ◽  
Zhansheng Wu ◽  
Yanhui He ◽  
Yajie Han ◽  
Yanbin Tong
Keyword(s):  
Slow Release ◽  
Release Behavior ◽  
Soil Environment ◽  
Simulative Soil

scholarly journals The Study of Zeolitic Imidazolate Framework (ZIF-8) Doped Polyvinyl Alcohol/Starch/Methyl Cellulose Blend Film

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1986 ◽  
Author(s):  
Shaoxiang Lee ◽  
Yunna Lei ◽  
Dong Wang ◽  
Chunxu Li ◽  
Jiaji Cheng ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Fruits And Vegetables ◽  
Weight Ratio ◽  
Methyl Cellulose ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Zeolitic Imidazolate Framework ◽  
Blend Film ◽  
Atomic Force

ZIF-8 nanoparticle-doped polyvinyl alcohol (PVA)-S-MC films were prepared via casting method. The effect of different concentrations of ZIF-8 on the physical properties and structural characterization of the films were investigated. The results indicated that ZIF-8 could increase the water resistance and mechanical property of the membrane. Through FTIR, scanning electron microscope (SEM), atomic force microscope (AFM), and TGA analysis, it was found that ZIF-8 changed the phenomenon of macromolecule agglomeration and improved the thermal stability of the membrane. The breathable behavior of the film was also studied through oxygen permeability and water vapor permeability analysis. The result illustrated that the breathability of the film improved significantly by adding ZIF-8. The maximum reached when the weight ratio of ZIF-8 was 0.01 wt %. The property expands the application of PVA/starch blend film in the postharvest technology of fruits and vegetables.

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

2021 ◽  
pp. 100223
Author(s):  
Daniel T. Gungula ◽  
Fartisincha P. Andrew ◽  
Japari Joseph ◽  
Semiu A. Kareem ◽  
Jeffery Tsware Barminas ◽  
...  
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Urea Fertilizer ◽  
Slow Release Urea ◽  
Borassus Aethiopum ◽  
Maesopsis Eminii

scholarly journals Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

2020 ◽  
Vol 12 (15) ◽  
pp. 5944 ◽  
Author(s):  
Bilal Beig ◽  
Muhammad Bilal Khan Niazi ◽  
Zaib Jahan ◽  
Erum Pervaiz ◽  
Ghulam Abbas Shah ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Slow Release ◽  
Release Kinetics ◽  
N Uptake ◽  
Paraffin Wax ◽  
World Population ◽  
Plaster Of Paris ◽  
N Release ◽  
Slow Release Urea ◽  
Urea Prills

The application of urea-based fertilizers in developing countries has gained significant momentum over time. urea usage is to meet demand and supply gap of food resources as world population is increasing at a fast pace. urea contains largest content of nitrogen (46%) among all the solid nitrogenous fertilizers. However, main drawback of urea is its higher dissolution rate. After soil application, most of urea nitrogen is lost through a leaching, runoff, nitrification-denitrification and ammonia volatilization. To tackle urea related environmental pollution, development of slow-release urea fertilizer is a need of the hour and this would also increase product use efficiency in terms of crop productivity and its N uptake. We studied the usage of polymeric materials in combination with inorganic substances like sulfur and plaster of Paris as effective and biodegradable coating substances for urea prills. For coating on urea prills, fluidized bed coater was used whereas paraffin wax and molasses were used as binding agents. The urea was coated with four different formulations, i.e., C-1: PVA 5% + plaster of Paris 10% + sulfur 5% + paraffin wax 2%, C-2: PVA 5% + starch 10% + sulfur 5% + paraffin wax 2%, C-3: gelatin 5% + plaster of Paris 10% + sulfur 5% + paraffin wax 2% and C-4: PVA 5% + starch 10% + sulfur 5% + paraffin wax 2.5% + molasses 2.5%. Each formulation along with uncoated urea prills (C-0) were evaluated for characterization and N release kinetics. All the formulations along with uncoated urea were applied to spinach crop in pot experiment. A control (No N: untreated) was also kept. Spinach biomass yield and N uptake were determined. The formulation C-1 yielded highest urea-N release efficiency and spinach N uptake of6.87% and 1.93 g N/pot, respectively. Themodified Schwarz and Sinclair formula gave the excellent representation of release of nutrient-N from coated urea prills. It is concluded that coating urea prills with organic and inorganic blends is better option to slow down N release kinetics and improve spinach productivity. Therefore, by using coated fertilizers, farmers can improve agro-environmental value of urea, worldwide.

Sign in / Sign up

Export Citation Format

Share Document