Sustainable and Biodegradable Copolymers from SO2 and Renewable Eugenol: A Novel Urea Fertilizer Coating Material with Superio Slow Release Performance

2020 ◽  
Vol 53 (3) ◽  
pp. 936-945 ◽  
Author(s):  
Limin Liu ◽  
Yonghao Ni ◽  
Yunfei Zhi ◽  
Wenbo Zhao ◽  
Manoj Pudukudy ◽  
...  
Keyword(s):  
Slow Release ◽  
Coating Material ◽  
Urea Fertilizer ◽  
Biodegradable Copolymers

scholarly journals Kinetika Slow Release Pupuk Urea Berlapis Chitosan Termodifikasi

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
YC Danarto ◽  
Anggita Nugrahey ◽  
Sela Murni Noviani
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Zero Order ◽  
Release Profile ◽  
Nitrogen Release ◽  
Diffusion Kinetic ◽  
Urea Fertilizer ◽  
First Order ◽  
Modified Chitosan ◽  
Urea Content

<p>During this time, the use of urea is not efficient, because about 40-70% of nitrogen in the fertilizer is not absorbed by plants. In order to increase the effectivity of nitrogen release in urea fertilizer, it needs to be coated with modified chitosan as slow releasing agent to form a hydrogel material by forming a cross linking with glutaraldehyde cross-linker.The aims of this research is to study the mechanism and the appropriate kinetic model of nitrogen release in slow releasing fertilizer of modified chitosan. This research was conducted by analyzing the ability of bio-hydrogel by calculating the percentage of swelling ratio and water retention of hydrogel and the nitrogen release in slow releasing fertilizer both in the soil and water. The experiments were conducted by varying the amount of urea used which  30 gram, 40 gram, 50 gram, 60 gram and 70 gram of urea fertilizer. The The release profile is then plotted on several models of diffusion kinetic such as zero order, first order, higuchi and korsmeyer peppas. The appropriate model of diffusion kinetic is chosen by the largest correction factor (R2).The results showed that nitrogen release of the slow releasing fertilizer in the soil with 50% urea content  and  the  water  followed  korsmeyer  peppas  model  with  fickian  mechanism. Nitrogen release in the soil with urea content of 30%, 40%, 60%, and 70% followed the korsmeyer peppas model with nonfickian mechanism.</p>

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

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 Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating

2016 ◽  
Vol 20 (1) ◽  
pp. 37 ◽  
Author(s):  
Lili Handayani ◽  
Gunawan Djajakirana ◽  
. Darmawan ◽  
Canecio Peralta Munoz
Keyword(s):  
Citric Acid ◽  
Slow Release ◽  
Nutrient Release ◽  
Fertilizer Application ◽  
Coating Material ◽  
Distilled Water ◽  
Chitosan Coating ◽  
Slow Release Fertilizer ◽  
Low Efficiency ◽  
Nutrient Solubility

The low-efficiency problem in fertilizer application can be overcome by controlling fertilizer solubility, i.e. by rendering the fertilizer to be released gradually; such material is also known as slow-release fertilizer (SRF). This research was aimed to formulate SRF by coating technique using acrylic and chitosan as the coating material, and to evaluate fertilizer resistance to too fast disintegration, and rate of nutrient release method. The results demonstrated that fertilizer formulation containing  N, P, K, Fe, Cu, and Zn with granulation technique yielded 74% of granules with 2-5 mm in diameter. The SRFs (formulated fertilizer with acrylic or chitosan coating) were more resistant to water pounding than non-SRF. Furthermore, shaking test with distilled water or 2% citric acid, or by percolation test with distilled water showed that the SRFs had lower nutrient solubility than the non-SRFs. The results of shaking test also specifically indicated that coating with acrylic made the fertilizer more resistant to the citric acid,suggesting that this coating material would be more suitable in acidic soils. The SRFs formulated with the addition of chitosan during blending of micronutrients prior to mixing with macronutrients, granulation, and final coating exhibited lower nutrient solubility than the SRFs without the pre-coating chitosan addition. [How to Cite: Lili H, G Djajakirana, Darmawan, and CP Munoz. 2015. Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating. J Trop Soils 19: 37-45. Doi: 10.5400/jts.2015.20.1.37][Permalink/DOI: www.dx.doi.org/10.5400/jts.2015.20.1.37]

scholarly journals Review: Synthesis of Urea in Several Methods

2021 ◽  
Vol 11 (2) ◽  
pp. 146
Author(s):  
Asep Rizki Pradana ◽  
Asep Royani ◽  
Kiki Zulfikri ◽  
Nabila Tuffahati ◽  
Rahma Zulfa Azzahra ◽  
...  
Keyword(s):  
Fly Ash ◽  
Plant Growth ◽  
Environmental Pollution ◽  
Soil Nitrogen ◽  
Slow Release ◽  
Raw Material ◽  
Effective Utilization ◽  
Urea Fertilizer ◽  
Release Method ◽  
Plant Fertility

<p>Urea (CO (NH)<sub>2</sub>) is one of the compositions in making fertilizer. Fertilizer is crucial, especially for plant growth (affecting plant fertility). If a plant had urea fertilizer on the soil, nitrogen in the fertilizer releases quickly, and it will cause environmental pollution. Therefore, many studies want to develop urea fertilizer to be more efficient to use. The purpose of this review is to find the most appropriate method for the efficient use of urea as seen from the material used, the technique used, and the results obtained. This review shows that the most appropriate method is the slow release method with NaOH and fly ash ingredients. Because this method can increase the effective utilization of urea, reduce environmental pollution, and be relatively more straightforward, the raw material is more affordable and spread widely in the market.</p><p> </p>

Utilization of Chitosan as Coating Material in Making NPK Slow Release Fertilizer

2020 ◽  
Vol 391 (1) ◽  
pp. 1900188 ◽  
Author(s):  
Muhammad D. Gumelar ◽  
Moh. Hamzah ◽  
Ade S. Hidayat ◽  
Dita A. Saputra ◽  
Idvan
Keyword(s):  
Slow Release ◽  
Coating Material ◽  
Slow Release Fertilizer

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
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