Chemical precipitation of cesium from waste solutions with iron(II)hexacyanocobaltate(III) and triphenylcyanoborate

Beheir, Sh. G.; Benyamin, K.; Mekhail, F. M.

doi:10.1007/bf02383731

Cited by 21 publications

(5 citation statements)

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“…Among the MHCMs compounds, Iron-Hexacyanocobaltate (FeHCC) has not been widely studied in literature; it is reported in papers focusing on Cs sorption probed by Mössbauer spectroscopy technique [19] and its removal in waste solutions through a process involving the precipitation of cesium [20]. The redox activity is likely to come from high spin iron atoms in FeHCC.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

et al. 2018

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This paper deals with the synthesis and characterization of iron-hexacyanocobaltate (FeHCC) and its antibacterial properties. The nanoparticles were prepared by a facile co-precipitation technique. Crystal structure, particle morphology, and elemental composition were determined using X-ray Powder Diffraction, X-ray fluorescence spectroscopy, Transmission Electron Microscopy (TEM), and Infrared Spectroscopy (IR). The antibacterial activity of the FeHCC nanoparticles was tested against Escherichia coli and Staphylococcus aureus as models for Gram-negative and Gram-positive bacteria, respectively, by bacterial counting method and microscopic visualization (TEM, FEG-SEM, and fluorescence microscopy). The results showed that the FeHCC nanoparticles bind to the bacterial cells, inhibit bacterial growth in a dose- and time-dependent manner, inducing a loss of the membrane potential, the production of reactive oxygen species and the release of macromolecules (nucleic acids and proteins) in the extracellular environment. To the best of our knowledge, this is the first study reporting the antimicrobial effects of metal-hexacyanometallates suggesting practical uses of these materials in different areas, such as self-cleaning surfaces or food packaging.

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Section: Introductionmentioning

confidence: 99%

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

et al. 2018

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“…Fe2 § can also be used for the removal of caesium from waste solutions in acidic media in particular, hydrochloric acid [27]. However, in nitric acid or sulphuric acid medium it is recommended to perform the precipitation process at an acidity of about 0.1M.…”

Section: Chemical Precipitationmentioning

confidence: 99%

On the use of hexacyanocobaltates in the separation of caesium from radioactive waste solutions

Mekhail

Aly

1999

Czech J Phys

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This paper reviews our work on the use ofhexacyanocobaltate salts in the chemical treatment of radioactive waste solutions. The divalent cations of the 3d-block elements together with the hexacyanocobaltate moiety form insoluble polymeric coordination compounds. These compounds have been used as chemical precipitants or ion exchangers for the separation ofradiocesium from various simulated and actual waste solutions. Precipitation in situ has been performed by using various hexacyanocobaltate salts of the divalent cations ofMn, Fe, Co and Ni. The results showed that Co 2 § and Ni 2 § salts have high selectivity for caesium. The presence of monovalent cations and detergent has significant effect on the precipitation process. On the other hand Cd 2 § salt has been found to be more stable than other salts in alkaline medium. As ion exchanger the sorption properties ofhexacyanocobaltate salts were studied. Adsorption of a cesium seems to proceed via an ion exchange mechanism. It has been used for the treatment of reprocessing medium active waste solution. A decontamination factor of about 103 has been achieved.

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“…A third application is the environmental absorption of cesium produced in nuclear reactions, ,, or in humans and animals that have been exposed to 137 Cs. They act coordinating these metals by the nitrogen atoms of the ligand, decreasing their absorption into the blood .…”

Section: Introductionmentioning

confidence: 99%

“…Although not having the clear action mechanism, nanoparticles composed by Fe[Co(CN) 6 ] and Fe[Fe(CN) 6 ] complexes exhibit good results against the Gram-positive bacterium Staphylococcus aureus and the Gram-negative Escherichia coli. A third application is the environmental absorption of cesium produced in nuclear reactions, 1,22,23 or in humans and animals that have been exposed to 137 Cs. They act coordinating these metals by the nitrogen atoms of the ligand, decreasing their absorption into the blood.…”

Section: ■ Introductionmentioning

confidence: 99%

Revisiting the Spectrum of Co(CN)₆^3–: The Role of Correlation, Solvation, and Vibronic and Spin–Orbit Couplings

et al. 2023

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In the present work, we revisit the spectrum of the hexacyanocobaltate(III) ion, [Co(CN) 6 ] 3− , which has been considered a prototype complex in the coordination chemistry, with modern quantum chemistry methods. The main features have been describing by revealing the role of different effects, such as vibronic coupling, solvation and spin−orbit coupling. The UV−vis spectrum is composed by two bands ( 1 A 1g → 1 T 1g and 1 A 1g → 1 T 2g ), characterized by singlet−singlet metalcentered transitions, and a more intense third one, characterized by charge transfer transition. There is also a small band shoulder. The first two are symmetry-forbidden transitions in the O h group. Their intensity can only be explained by a vibronic coupling mechanism. For the band shoulder, additional to vibronic coupling, spin−orbit coupling is also necessary, since the transition is characterized as singlet to triplet, 1 A 1g → 3 T 1g .

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Chemical precipitation of cesium from waste solutions with iron(II)hexacyanocobaltate(III) and triphenylcyanoborate

Cited by 21 publications

References 12 publications

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

On the use of hexacyanocobaltates in the separation of caesium from radioactive waste solutions

Revisiting the Spectrum of Co(CN)₆^3–: The Role of Correlation, Solvation, and Vibronic and Spin–Orbit Couplings

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Chemical precipitation of cesium from waste solutions with iron(II)hexacyanocobaltate(III) and triphenylcyanoborate

Cited by 21 publications

References 12 publications

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

Synthesis and antibacterial activity of iron-hexacyanocobaltate nanoparticles

On the use of hexacyanocobaltates in the separation of caesium from radioactive waste solutions

Revisiting the Spectrum of Co(CN)63–: The Role of Correlation, Solvation, and Vibronic and Spin–Orbit Couplings

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Revisiting the Spectrum of Co(CN)₆^3–: The Role of Correlation, Solvation, and Vibronic and Spin–Orbit Couplings