Synthesis of highly intercalated urea-clay nanocomposite via domestic montmorillonite as eco-friendly slow-release fertilizer

Golbashy, M; Sabahi, Hossein; Allahdadi, Iraj; Nazokdast, H.; Hosseini, Morteza

doi:10.1080/03650340.2016.1177175

Cited by 72 publications

(27 citation statements)

References 24 publications

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“…Full intercalation of maturing of glauconite and urea (in a 3:1 ratio) is achieved with a 20 min synthesis in a planetary mill or 60 min in a ring mill. These results are consistent with the data on the mechanochemical activation of montmorillonite [23] and kaolinite [25] when using them as SRF. Compounds based on glauconite and urea, produced using mechanochemical methods, are recommended for testing as potassium-nitrogen complex mineral SRFs.…”

Section: Discussionsupporting

confidence: 91%

“…The intensity of the symmetric deformation of N-H at 1465 cm −1 decreased as well, but peaks of the clay minerals remained. The change in the intensity of the C-N and N-H strains can be explained by the intercalation of these molecules into the interlayer space [21,23,49,50] of the dioctahedral mineral (glauconite). This is consistent with the relatively stable chemical composition of the composites (Table 1) and XRD spectra (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

“…Because fertilization of agricultural soils with urea increases the risks of environmental pollution due to the distribution of excess nitrogen, creating SRF composites that control the release of nitrogen to plants is necessary [17][18][19]. Based on urea as an SRF component, polymers [20,21], clay minerals such as montmorillonite [22,23], and kaolinite [24,25] were investigated. Clay minerals are environmentally stable and cheap for the synthesis of SRF [10,11,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

et al. 2019

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We investigated the mechanochemical synthesis of complex slow release fertilizers (SRF) derived from glauconite. We studied the effectiveness of the mechanical intercalation of urea into glauconite using planetary and ring mills. The potassium-nitric complex SRFs were synthesized via a mechanochemical method mixing glauconite with urea in a 3:1 ratio. The obtained composites were analyzed using X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence analysis, and infrared spectroscopy. The results show that as duration of mechanochemical activation increases, the mineralogical, chemical, and structural characteristics of composites change. Essential modifications associated with a decrease in absorbed urea and the formation of microcrystallites were observed when the planetary milling time increased from 5 to 10 min and the ring milling from 15 to 30 min. Complete intercalation of urea into glauconite was achieved by 20 min grinding in a planetary mill or 60 min in a ring mill. Urea intercalation in glauconite occurs much faster when using a planetary mill compared to a ring mill.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

et al. 2019

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“…Dramatic change in soil moisture conditions during irrigation may form a strict anaerobic environment that increases the number of nitrite reduction bacteria, thus improving the process of denitrification and leading to an increase in the transformation of NO application in this study was not able to suppress soil N 2 O-N emission. This study found that application of bentonite could significantly reduce NH 3 -N volatilization, N 2 O-N emission and soil N leaching (Tables 3 and 4), mainly due to its adsorption characteristic of N. The main component of bentonite is montmorillonite that is a 2:1 layered phyllosilicate clay whose inter layer ions can exchange with NH 4 + -N (Golbashy et al, 2017). Under a wet condition, free NH 4 + -N in soil is more easily fixed by bentonite to form the slow-released N (Solihin et al, 2011).…”

Section: Effects Of Soil Amendments On Soil N Losses and Yieldmentioning

confidence: 82%

“…However, effective agricultural practices play vital roles in reducing N losses. Recently, studies have shown that soil amendments such as biochar, silicate minerals (bentonite) and organic polymers (polyacrylamide) could effectively reduce N losses (Golbashy et al, 2017;Yang et al, 2017). The reason is that the larger specific surface area and functional groups of biochar increase the adsorption capacity of soil inorganic N and significantly reduce the substrate concentrations of nitrification and denitrification (Clough et al, 2013;Cayuela et al, 2014;Thies et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of three types of soil amendments on yield and soil nitrogen balance of maize-wheat rotation system in the Hetao Irrigation Area, China

Zheng

et al. 2019

J. Arid Land

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Excessive fertilization combined with unreasonable irrigation in farmland of the Hetao Irrigation Area (HIR), China, has resulted in a large amount of nitrogen (N) losses and agricultural non-point source pollution. Application of soil amendments has become one of the important strategies for reducing N losses of farmland. However, there is still no systematic study on the effects of various soil amendments on N losses in the HIR. In this study, three types of soil amendments (biochar, bentonite and polyacrylamide) were applied in a maize-wheat rotation system in the HIR during 2015-2017. Yields of maize and wheat, soil NH 3 volatilization, N 2 O emission and NO 3leaching were determined and soil N balance was estimated. The results showed that applications of biochar, bentonite and polyacrylamide significantly increased yields of maize by 9.2%, 14.3% and 13.3%, respectively, and wheat by 9.2%, 16.6% and 12.3%, respectively, compared with the control (fertilization alone). Applications of biochar, bentonite and polyacrylamide significantly reduced soil N leaching by 23.1%, 35.5% and 27.1%, soil NH 3-N volatilization by 34.8%, 52.7% and 37.8%, and soil N surplus by 23.9%, 37.4% and 30.6%, respectively. Applications of bentonite and polyacrylamide significantly reduced N 2 ON emissions from soil by 37.3% and 35.8%, respectively, compared with the control. Compared with application of biochar, applications of bentonite and polyacrylamide increased yields of maize and wheat by 5.1% and 3.5%, respectively. Our results suggest that soil amendments (bentonite and polyacrylamide) can play important roles in reducing N losses and increasing yield for the maize-wheat rotation system in the HIR, China.

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Preparation and Properties of a Double‐Coated Slow‐Release Urea Fertilizer with Poly(propylene carbonate), a Sodium Polyacrylate Hydroscopicity Resin and Sodium Alginate

Sui

Niu

2018

ChemistrySelect

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A double‐coated slow‐release urea fertilizer was designed and successfully prepared. Its core was urea, and the shell was biodegradable poly(propylene carbonate) (PPC) derived from CO2 copolymer as the inner coating, and sodium polyacrylate hydroscopicity resin (SPHR) and sodium alginate (SA) as the outer coating. The effects of the molecular weight of PPC, the amount of SPHR and SA on the slow release behavior of urea were investigated. The experimental results indicated that the coating materials had a good slow‐release property for urea release. The urea slow‐release time can reach 500 min in water. The double‐coated slow‐release urea fertilizer has water‐retention capacity. The product has the wild applications in agriculture.

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Synthesis of highly intercalated urea-clay nanocomposite via domestic montmorillonite as eco-friendly slow-release fertilizer

Cited by 72 publications

References 24 publications

Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

Effects of three types of soil amendments on yield and soil nitrogen balance of maize-wheat rotation system in the Hetao Irrigation Area, China

Preparation and Properties of a Double‐Coated Slow‐Release Urea Fertilizer with Poly(propylene carbonate), a Sodium Polyacrylate Hydroscopicity Resin and Sodium Alginate

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