Fabrication of smart magnetic nanocomposite asymmetric membrane capsules for the controlled release of nitrate

Emami, Nahid; Razmjou, Amir; Noorisafa, Fatemeh; Korayem, Asghar Habibnejad; Zarrabi, Ali; Ji, Chunhui

doi:10.1016/j.enmm.2017.09.001

Cited by 17 publications

(14 citation statements)

References 56 publications

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“…However, due to poor thermo-physical and mechanical properties, the modification of these products with a suitable stabilizing or plasticizing agent is compulsory [21]. Polymer coating materials i.e., polystyrene [22], polyurethane [18], polyethylene [23], polyether sulfone [24], and polyacrylamide [25] are considered promising stabilizing or plasticizing agents and utilized for improving the controlled release of urea. However, decomposition of these plasticizing compounds in the soil is problematic; therefore, these compounds persist for a longer time period and become a source of soil pollution [26].…”

Section: Introductionmentioning

confidence: 99%

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

et al. 2021

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The low nitrogen utilization efficiency (NUE) of commercial fertilizers is one of the main hurdles in higher crop production and reduction of fertilizer N losses to the environment. However, interactions between most the macronutrients could have synergistic outcomes that affect crop NUE. The coating of urea with macronutrients and biopolymers may control N release and synergistically impact its crop NUE. In this study, urea was coated with 3% of different polymers, combined with 5% potassium iodide (KI) (i) Gum Arabica (GA + KI), (ii) polyvinyl alcohol (PVA + KI), and (iii) gelatin (Gelatin + KI) to control its N release, leaching, and increase of wheat NUE. Scanning electron microscopy, Fourier Transform Infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses confirmed the successful coating of all KI and biopolymer combinations on urea granules. All coating combinations slowed down urea release in water and reduced its leaching from the soil, but the highest reduction in both parameters was observed with the GA + KI treatment, compared to the uncoated urea. After soil application, GA + KI decreased urea leaching by 26% than the uncoated urea in lysimeter. In the field, soil mineral N remained significantly high with the GA + KI and PVA + KI treatments at the wheat tillering, booting, grain filling and maturity stages, compared to the uncoated urea. However, K content was only high (28%) with the GA + KI treatment at final harvest. Likewise, microbial biomass N was only high with GA + KI at grain filling (20%) and maturity stages (24%) than the uncoated urea. Such synchronized N availability led to high wheat grain yield (28%), N (56%) uptake, and apparent N recovery (130%) with the GA + KI treatment, compared to the uncoated fertilizer. The increment in NUE with GA + KI could be due to the synergistic effect of K on N availability; therefore, we observed higher wheat yield and N utilization efficiency with this treatment. Hence, urea coated with macronutrient (K) plus biopolymer is recommended to improve wheat yield, NUE, and for reduction of environmental N losses.

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Section: Introductionmentioning

confidence: 99%

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

et al. 2021

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“…A new class of polymer, polyether sulfone, was also used together with Fe 2 O 3 nanofiller as a CRF [ 46 ]. The addition of Fe 2 O 3 nanoparticles (NPs) thickens the coating layer, which slows down the release of nutrients.…”

Section: Coating Materialsmentioning

confidence: 99%

“…An increase in temperature reduces the duration of lag period and increases the linear rate of release [ 97 ]. Emami et al [ 46 ] explained that as the temperature in the environment (soil) increases, the solubility of nutrients within the polymer and diffusion rate also increase, as diffusion coefficient is a function of temperature. In addition, pore size also increases with increasing temperature due to higher swelling, which results in higher release rates.…”

Section: Important Factors Affecting Crfsmentioning

confidence: 99%

“…The acidic or alkaline nature of the release medium has a significant effect on the interactions of chemical species in the granule and the diffusion coefficient of the ions [ 98 ]. Rashidzadeh and Olad [ 80 ], Emami et al [ 46 ], Wen et al [ 69 ], Uzoh et al [ 55 ] and Salimi et al [ 70 ] reported that at an acidic environment (pH 2–5), there is a high concentration of H + ions. This causes most of the carboxylate anions (COO − ) to be protonated and prevents anion-anion electrostatic repulsion in the network, decreasing the swelling capacity.…”

Section: Important Factors Affecting Crfsmentioning

confidence: 99%

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Controlled Release Fertilizers: A Review on Coating Materials and Mechanism of Release

Lawrencia

Wong

Low

et al. 2021

Plants

215

149

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Rising world population is expected to increase the demand for nitrogen fertilizers to improve crop yield and ensure food security. With existing challenges on low nutrient use efficiency (NUE) of urea and its environmental concerns, controlled release fertilizers (CRFs) have become a potential solution by formulating them to synchronize nutrient release according to the requirement of plants. However, the most significant challenge that persists is the “tailing” effect, which reduces the economic benefits in terms of maximum fertilizer utilization. High materials cost is also a significant obstacle restraining the widespread application of CRF in agriculture. The first part of this review covers issues related to the application of conventional fertilizer and CRFs in general. In the subsequent sections, different raw materials utilized to form CRFs, focusing on inorganic and organic materials and synthetic and natural polymers alongside their physical and chemical preparation methods, are compared. Important factors affecting rate of release, mechanism of release and mathematical modelling approaches to predict nutrient release are also discussed. This review aims to provide a better overview of the developments regarding CRFs in the past ten years, and trends are identified and analyzed to provide an insight for future works in the field of agriculture.

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“…The literature features many research works which have investigated variable conditions which include the temperature and composition of a casting solution (concentration, additive, and solvent) [11,12,13], solvent evaporation [13,14], temperature of nonsolvent [15], temperature of dope [16], and additional materials in the nonsolvent during phase inversion. Although many membrane preparation parameters that affect membrane structures have been investigated in the literature [17], few studies have been conducted on the optimization of these parameters through statistical analysis.…”

Section: Introductionmentioning

confidence: 99%

ANOVA Design for the Optimization of TiO2 Coating on Polyether Sulfone Membranes

et al. 2019

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There have been developments in the optimization of polyether sulfone (PES) membranes, to provide antifouling and mechanically stable surfaces which are vital to water purification applications. There is a variety of approaches to prepare nanocomposite PES membranes. However, an optimized condition for making such membranes is in high demand. Using experimental design and statistical analysis (one-half fractional factorial design), this study investigates the effect of different parameters featured in the fabrication of membranes, as well as on the performance of a nanocomposite PES/TiO2 membrane. The optimized parameters obtained in this study are: exposure time of 60 s, immersion time above 10 h, glycerol time of 4 h, and a nonsolvent volumetric ratio (isopropanol/water) of 30/70 for PES and dimethylacetamide (PES-DMAc) membrane and 70/30 for PES and N-methyl-2-pyrrolidone (PES-NMP) membrane. A comparison of the contributory factors for different templating agents along with a nanocomposite membrane control, revealed that F127 triblock copolymer resulted in an excellent antifouling membrane with a higher bovine serum albumin rejection and flux recovery of 83.33%.

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Fabrication of smart magnetic nanocomposite asymmetric membrane capsules for the controlled release of nitrate

Cited by 17 publications

References 56 publications

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

Controlled Release Fertilizers: A Review on Coating Materials and Mechanism of Release

ANOVA Design for the Optimization of TiO2 Coating on Polyether Sulfone Membranes

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