Properties of Coated Controlled Release Diammonium Phosphate Fertilizers Prepared with the Use of Bio‐based Amino Oil

Abstract

In an effort to enhance the efficiency of fertilizer use and minimize their negative impact on the environment, a novel biomass-based, functional controlled-release fertilizer was use to improve nutrient use efficiency and increase crop production systems for more sustainable agriculture practices. Here, biobased amino-oil (Priamine) mixtures were proposed as an outer coating with different layers for the control of phosphorus release from diammonium Phosphate (DAP). These hydrophobic coatings conferred excellent barrier properties and flexibility to coatings. The morphological characterization of the coated fertilizer was performed by Scanning Electronic Microscopy (SEM), and Electronic Diffraction X-ray (EDX) maping, and revealed the formation of a cohesive film and a good adhesion between DAP fertilizer and coating film. The release rate of nutrients (phosphate) in water was investigated by UV-Vis spectrophotometer. The effect of coating thickness was investigated on release time and diffusion coefficient of phosphor release in distilled water. Release time increased with the coating thickness. The diffusion coefficient of nutrient release decreased with the coating thickness. Compared with uncoated granule which is totally solubilized after less than 2 hours, the P release profiles of the coated granules reached the equilibrium stage approximatively after 98 and 126 hours when the DAP is coated with only Priamine single-layer (1L) and double-layer (2L), respectively. Moreover, the strategy adopted has successfully provided a very slow release and long-term availability of nutrients sources with biobased coating oil compared to uncoated fertilizer (DAP) and therefore exhibited promising application for sustainable development of modern agriculture and circular economic.

Biodegradable maleic–itaconic polymer‐coated phosphatic fertilizer improved phosphorous recovery in calcareous soil

“…These cavities and cracks in the surface might be easily permeated by water molecules, resulting in the quick release of nutrients from uncoated DAP fertilizer. The EDS analysis of coated DAP (Figure 2d) showed relatively less P on the surface than uncoated commercial DAP, which correlates well with SEM analysis (Sofyane et al., 2020). The traces of P and N detected at the surface of coated DAP might be associated with the occurrence of certain micropores on the granule surface even after polymer‐coating (De Matos et al., 2018).…”

“…Overall, the peaks confirm the presence of the molecular structure of vinyl acetate in the formulated polymers (Poly‐A and Poly‐B) in the present study. As expected, the polymer materials (Poly‐A and Poly B) made a thick layer of the smooth surface around the DAP granules, as indicated by SEM images (Figure 2), compared to uncoated commercial DAP fertilizer granules (Bortoletto‐Santos et al., 2016; Sofyane et al., 2020). Many pinholes or patches can be seen on the uncoated particle surface.…”

“…A strong peak at 1593 cm −1 shows the stretching vibration of the C═O bond (Samaha et al, 2005). 2), compared to uncoated commercial DAP fertilizer granules (Bortoletto-Santos et al, 2016;Sofyane et al, 2020). Many pinholes or patches can be seen on the uncoated particle surface.…”

Fertilizers and Fertilization Strategies Mitigating Soil Factors Constraining Efficiency of Nitrogen in Plant Production

“…Their use increases the efficiency of using P from fertilizers (PUE) compared to traditional phosphorus fertilizers, and at the same time they reduce the negative impact of fertilization on the environment [ 191 , 211 ]. The rate of phosphorus release from fertilizers depends on a number of factors, including type and thickness of coating material, soil temperature and pH, humidity and microbial activity [ 193 , 212 ]. According to Fertahi et al [ 213 ], 3 days after the application of phosphorus fertilizers, 100% P was released from water-soluble triple superphosphate (TSP) granular fertilizers, and only 60% from biopolymer coated TSPi.…”

Experimental optical properties explained by Density functional theory of the natural Red Algae for dye-sensitized solar cells application

“…An EDAX detector attached to the SEM equipment using the Tescan Vega3 (Tescan Orsay, France) (Sofyane et al 2020).…”