Properties of iron-containing nanohydroxyapatite-based composites

Pankratov, D. А.; Dolzhenko, V. D.; Ovchenkov, E. A.; Anuchina, M. M.; Северин, А. В.

doi:10.1134/s0020168517010125

Cited by 4 publications

(1 citation statement)

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“…Subspectrum 2 (Table 1) with the largest isomeric shift (0.39 mm/s) and a quadrupole splitting of 0.57 mm/s corresponds to Fe 3+ ions in "isolated" oxygen octahedra was designated as Fe2 sites as assigned in [66]. Intercorrelation, which can be clearly seen between the values of the quadrupole splitting and the width of the resonance lines of subspectra 1 and 2 (Table 1) has been reported elsewhere [67]. This indicates that the oxygen-containing molecular/ion species (H 2 O/OH -/O 2-), which surround iron atoms in ferrihydrite lattice, make a partial contribution to the Mössbauer parameters related to their dynamic properties and electromagnetic interactions.…”

Section: Characterization Of the Synthesized Iron-containing Nanoparticlesmentioning

confidence: 59%

Foliar Application of Humic-Stabilized Nanoferrihydrite Resulted in an Increase in the Content of Iron in Wheat Leaves

et al. 2020

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The objective of this study was to synthesize iron (hydr)oxide nanoparticles (IONPs) stabilized by humic substances, and to estimate the feasibility of their use for foliar application on iron deficient plants. The IONPs were synthesized by rapid hydrolysis of iron(III) nitrate in a solution of potassium humate. The iron speciation and nanoparticle morphologies were characterized using X-ray diffraction, transmission electron microscopy, and Mössbauer spectroscopy. The obtained sample of IONPs was applied at concentrations of 1- and 10-mM Fe, and 0.2% urea was used as an adjuvant. Wheat plants (Triticum aestivum L. cv. L15) were used for the iron uptake test. For both of the concentrations tested, spraying the nanoparticles resulted in a 70–75% higher iron content in wheat leaves compared to ferric ammonium salt of ethylenediaminetetraacetic acid (Fe-EDTA). The synergistic effect of humic substances acting as a surfactant seemed to promote an increase in the iron uptake of the ferrihydrite nanoparticles compared to the aqueous Fe-EDTA solution used in this study. We concluded that humic-stabilized IONPs are much better suited to foliar application as compared to soil amendment when applied as a source of iron for plants. This is because humic substances act as a capping agent for nanoparticles and the surfactants enhance iron penetration into the leaf.

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Section: Characterization Of the Synthesized Iron-containing Nanoparticlesmentioning

confidence: 59%