Nitrogen release characteristics of polyethylene-coated controlled-release fertilizers and their dependence on membrane pore structure

Yang, Xiangdong; Jiang, Rongfeng; Lin, Yangzheng; Li, Yanting; Li, Juan; Zhao, Bingqiang

doi:10.1016/j.partic.2017.05.002

Cited by 26 publications

(16 citation statements)

References 17 publications

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“…Compared with the outer core, the outer film was obviously smooth and dense, and there was no visible sign of gaps or cavities in the coating layer, indicating that the wrapping effect was better. Previous studies have indicated that nutrient release increased along with the number of pores (Wei et al, 2017;Yang et al, 2018), and the combination of the figures visually explained the root cause of the slow dissolution of the binuclear fertilizer.…”

Section: Microstructure Of Binuclear Fertilizermentioning

confidence: 83%

Preparation and Characterization of Attapulgite‐Fly Ash–Based Binuclear Slow‐Release Fertilizer Encapsulated by Eudragit

Wang

Chen

et al. 2019

Agronomy Journal

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To enhance the effectiveness of urea, a novel, binuclear, slow‐release urea fertilizer was developed with the application of drum‐coating technology, which used large granular urea as the core carrier, attapulgite (APT)–fly ash (FA) as the inner coating, and Eudragit as the outer coating. The nutrient‐release characteristics of the binuclear slow‐release fertilizer with 10% coating synthesized under optimized conditions were studied in soil and water, and the relationships between pH, electrical conductivity, and nitrogen release rate were determined through fitting function. The structure and properties of the samples were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The results indicated that the optimum preparation conditions were as follows: the inner coating shall be 4% binder concentration, 10 g APT and FA in total, APT/FA = 7:3; coating film material of Eudragit E100, 75% ethanol concentration, with coating accounting for >9% and plasticizer accounting for 1%. The product showed excellent release performance, with 65.74% of the nutrients leaching in the soil column within 28 d. Therefore, this work has demonstrated the potential of this new double‐coated fertilizer system in agriculture for improving the effectiveness of fertilizers. Core Ideas A novel binuclear slow‐release urea fertilizer was developed with the application of drum‐coating technology under optimized conditions. Binuclear fertilizer exhibited an excellent release behavior of 65.74% nutrient leaching in the soil column within 28 days. The relationship between the nutrient release rate of binuclear fertilizer in water and soil column was exponential fitting. The method of predicting the rate of nutrient release using pH and EC was feasible and accurate.

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Section: Microstructure Of Binuclear Fertilizermentioning

confidence: 83%

Preparation and Characterization of Attapulgite‐Fly Ash–Based Binuclear Slow‐Release Fertilizer Encapsulated by Eudragit

Wang

Chen

et al. 2019

Agronomy Journal

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“…Usually, petroleum based polymers are using for this purposes, such as resins, polystyrene, and polyethylene. [89][90][91] High cost and severe environmental problems associated with these nonbiodegradable polymers limits its application in CRFs field. Today, researchers are trying to find a biodegradable as well as low cost coating material for substituting this nonbiodegradable polymer coating.…”

Section: Application Of Bio Epoxy Coatingsmentioning

confidence: 99%

Bio Epoxy Coatings: An Emergent Green Anticorrosive Coating for the Future

Sreehari

Sethulekshmi

Saritha

2022

Macro Materials & Eng

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Corrosion of metals is a serious threat to the world economy in this current era. Coating is one of the best solutions for avoiding this long-standing problem and thus coating technology is gaining much importance nowadays. Epoxy is an excellent coating material for corrosion prevention in metals. Due to the increasing environmental issues and price of petroleum-based products, researchers are forced to find a suitable alternative to existing epoxy based anticorrosive coatings. The petrochemical sources of epoxies can be replaced by bio oils like vegetable or animal oils thereby resulting in the production of bio epoxy resins. The bio epoxy monomers are biodegradable, cost effective, less toxic, and easily processable than synthetic monomers. The resulting bio epoxy coatings can be effectively employed to protect the metal surfaces from corrosion enabling the development of efficient anticorrosion coatings. This review deals with the fabrication of bio epoxy coatings and analysis of bio epoxy coatings, such as anticorrosion, chemical resistance, surface morphology, mechanical properties, thermal stability, and wettability. Moreover, this review focuses on the applications of bio epoxy coatings.

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“…The release tests in water were carried out (in triplicate) using 0.2 g portions of FERT and urea, which were placed in polyethylene bags and subsequently immersed in 200 mL of distilled water. After predetermined time intervals (1 h, 2 h, 3 h, 1 day, 2 days, 3 days, 7 days, 10 days, 15 days, 20 days, and 30 days), aliquots of 500 lL were removed and analyzed using a UV-Vis spectrophotometer, in order to assess the release of urea from the materials (Yang et al 2018). The percentage of urea released during the experiment was calculated according to Eq.…”

Section: Elemental Analysismentioning

confidence: 99%

“…where M n is the concentration of urea released on each day of the experiment and M is the final concentration released in the experiment (Yang et al 2018).…”

Section: Elemental Analysismentioning

confidence: 99%

Using water hyacinth (Eichhornia crassipes) biomass and humic substances to produce urea-based multi-coated slow release fertilizer

et al. 2021

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Urea-based multi-coated slow release fertilizer was produced using water hyacinth, humic substances, and chitosan, with water rich in natural organic matter as a solvent. Elemental analysis showed that the nitrogen content of the fertilizer (FERT) was around 20%. Swelling tests demonstrated the effectiveness of the water hyacinth crosslinker, which reduced the water permeability of the material. Leaching tests showed that FERT released a very low concentration of ammonium (0.82 mg L−1), compared to the amount released from urea (43.1 mg L−1). No nitrate leaching was observed for FERT, while urea leached 13.1 mg L−1 of nitrate. In water and soil, FERT showed maximum releases after 30 and 40 days, respectively, while urea reached maxima in just 2 and 5 days, respectively. The results demonstrated the promising ability of FERT to reduce nitrogen losses, as well as to minimize environmental impacts in the soil–plant-atmosphere system and to improve the efficiency of nitrogen fertilization. Graphic abstract

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Nitrogen release characteristics of polyethylene-coated controlled-release fertilizers and their dependence on membrane pore structure

Cited by 26 publications

References 17 publications

Preparation and Characterization of Attapulgite‐Fly Ash–Based Binuclear Slow‐Release Fertilizer Encapsulated by Eudragit

Preparation and Characterization of Attapulgite‐Fly Ash–Based Binuclear Slow‐Release Fertilizer Encapsulated by Eudragit

Bio Epoxy Coatings: An Emergent Green Anticorrosive Coating for the Future

Using water hyacinth (Eichhornia crassipes) biomass and humic substances to produce urea-based multi-coated slow release fertilizer

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