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.

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

An Eco-Friendly Slow-Release Urea Fertilizer Based on Waste Mulberry Branches for Potential Agriculture and Horticulture Applications

2014 ◽  
Vol 2 (7) ◽  
pp. 1871-1878 ◽  
Author(s):  
Yong Zhang ◽  
Xiying Liang ◽  
Xiaogang Yang ◽  
Hongyi Liu ◽  
Juming Yao
Keyword(s):  
Slow Release ◽  
Urea Fertilizer ◽  
Slow Release Urea

Potential of Epoxidized Natural Rubber (ENR) as Hydrophobicity Contributor in Chitosan-Urea Fertilizer

2015 ◽  
Vol 761 ◽  
pp. 536-541 ◽  
Author(s):  
Noraiham Mohamad ◽  
Nor Nadiah Abdul Hamid ◽  
Nor Abidah Abdul Aziz ◽  
Jeeferie Abd Razak ◽  
Umar Al Amani Azlan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Natural Rubber ◽  
Water Retention ◽  
Slow Release ◽  
Compositional Analysis ◽  
Epoxidized Natural Rubber ◽  
Hydrophobic Properties ◽  
Urea Fertilizer ◽  
Slow Release Urea

This study is to investigate the potential of ENR to be incorporated with chitosan for slow release urea fertilizer. In this research, mixture of chitosan and epoxidized natural rubber (ENR) was used as binder to take advantage of their biodegradable and polar characteristics, respectively. The effect of mixing formulation to the properties of fertilizer was studied. Firstly, the chitosan and ENR were diluted in toluene with the presence of bentonite as filler. Then, urea powder was mixed and stirred for 20 minutes before left to dry overnight in an oven at 60°C. Water absorption and water retention analysis were carried out on compressed pellets. The increase of ENR loading was observed to contribute to the increase of hydrophobic properties of the fertilizer. The findings were supported by compositional analysis using Fourier Transform Infrared spectroscopy (FTIR).

scholarly journals Calcium Chelation of Lignin from Pulping Spent Liquor for Water-Resistant Slow-Release Urea Fertilizer Systems

2016 ◽  
Vol 5 (1) ◽  
pp. 1054-1061 ◽  
Author(s):  
Mika Henrikki Sipponen ◽  
Orlando J. Rojas ◽  
Ville Pihlajaniemi ◽  
Kalle Lintinen ◽  
Monika Österberg
Keyword(s):  
Slow Release ◽  
Urea Fertilizer ◽  
Calcium Chelation ◽  
Slow Release Urea ◽  
Spent Liquor

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

Alginate-starch micro beads as a slow release urea fertilizer

2021 ◽  
Author(s):  
Sunardi ◽  
Ersha Mayori ◽  
Uripto Trisno Santoso
Keyword(s):  
Slow Release ◽  
Urea Fertilizer ◽  
Slow Release Urea

Characterization; formulation and application of Natural Nano zeolitic materials from Kenya as Smart Delivery Systems for fertilizers and pesticides

2020 ◽  
pp. 338-349
Author(s):  
Gabriel A. Waswa ◽  
Immaculate N. Michira ◽  
Debora A. Abong'o ◽  
Dickson Andala ◽  
Austin O. Aluoch
Keyword(s):  
Slow Release ◽  
Delivery Systems ◽  
Bet Surface Area ◽  
Natural Zeolites ◽  
Zeolite A ◽  
Urea Fertilizer ◽  
Pore Sizes ◽  
Lambda Cyhalothrin ◽  
Zeolitic Materials

This study aimed at using natural zeolitic materials sampled form different places and characterized as nano porous smart delivery systems for storage and controlled release of fertilizer and pesticide molecules. XRD characterization of sample ZT-GA-01 showed that it was zeolite A artificial, abbreviated as Linde Type A (LTA), sample EL-GA-06 was Phillipsite natural zeolites. IR Spectroscopy for ZT-GA-01 and EB-GA-02 showed similar peaks between 3420 – 3480 cm-1, 2350 – 2360 cm-1 and 1630 – 1660 cm-1 indicating H-O-H stretching and bending, while 440 – 670 cm-1 representing Si-O-Si bending for internal tetrahedral. Besides comparable EDX characterized silica to alumina composition of sample EB-GA-02 and the artificial zeolite A applied as the standard, determined as 37.4 % to 18.8 % and 43.6 % to 56.4 % respectfully. Physical properties of samples ZT-GA-01 and EB-GA-02 in terms of BET surface area, BJH pore volume and pore sizes were obtained as; 0.6716 m2/g, 0.002333 cm3/g, 151.519 Å and 0.7099 m2/g, 0.006767 cm3/g, 389.846 Å respectively. Urea loaded samples EB-GA-02 indicated a 39.844 % reduction in pore sizes after successful loading of urea fertilizer into the nano-spaces, while pesticide loading indicated a reduction in pore volumes and pore sizes by 19.15 % and 32.74 % respectively. The simulated release shoed about 82.8 % of stacked urea fertilizer discharged in water and 74.2 % loaded urea released in soil, while 34.4 % and 40.1 % lambda cyhalothrin pesticide amounts were released by pesticide loaded zeolitic sample EB-GA-02 in water and soil respectively. Application of zeolitic sample EB-GA-02 as smart delivery systems demonstrated a sustained slow release of both urea and Lambda cyhalothrin pesticide on tomato and spinach growing and monitoring experiments for the 60 days’ period. In conclusion, our study showed that there exist zeolites and zeolitic materials in some selected parts in Kenya. As well, identified zeolitic sample EB-GA-02 can be used to successfully store agrochemical molecules and significantly delay their release in soil hence applied as nanozeolitic smart delivery systems.

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