Chromatographic separation of sodium, cobalt and europium on the particles of zirconium molybdate and zirconium silicate ion exchangers

El-Gammal, B.; Shady, S. A.

doi:10.1016/j.colsurfa.2006.02.068

Cited by 50 publications

(14 citation statements)

References 22 publications

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“…Figure showed the characteristic bands at around 3425 cm −1 and 1624 cm −1 corresponding to the stretching and bending vibrations of ‐OH functional groups of adsorbed water in the sample, respectively. The characteristic adsorption peaks at about 429–591, 640 and 776 cm −1 were assigned to the metal‐oxygen bonding in the Si‐O and Zr‐O forms . The absorption bands of the Cu‐O bonds have been overlapped by the same frequency regions of Si‐O and Zr‐O in the natural support.…”

Section: Resultsmentioning

confidence: 96%

“…XRD pattern of the biosynthesized Cu/zirconium silicate nanocomposite groups of adsorbed water in the sample, respectively. The characteristic adsorption peaks at about 429-591, 640 and 776 cm −1 were assigned to the metal-oxygen bonding in the Si-O and Zr-O forms [28,48]. The absorption bands of the Cu-O bonds have been overlapped by the same frequency regions of Si-O and Zr-O in the natural support.…”

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confidence: 99%

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Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Nasrollahzadeh

Sajjadi

Sajadi

2018

Applied Organom Chemis

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A simple and convenient protocol was established for the synthesis of the N‐benzyl‐N‐arylcyanamides through N‐benzylation of a wide variety of arylcyanamides using copper nanoparticles immobilized on natural zirconium silicate as a novel and green heterogeneous catalyst. In this study, we showed a novel, cost efficient, convenient and simple method for green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract as capping and reducing agent. The structure of the novel catalyst was successfully characterized using a number of micro/spectroscopic techniques such as XRD, FESEM, BET, EDS, TEM, FT‐IR and elemental mapping. TEM micrographs of obtaining biocatalyst revealed mostly spherical particles with an average diameter of about 15–25 nm on the surface of natural support. The prepared catalyst was used in the N‐benzylation of a variety of arylcyanamides with benzyl bromide and showed high activity and stability for the efficient synthesis of N‐benzylarylcyanamides in good yields. Remarkably, the catalyst can be easily recovered from the reaction medium and reused up to five runs without losing its catalytic activity.

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Section: Resultsmentioning

confidence: 96%

mentioning

confidence: 99%

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Nasrollahzadeh

Sajjadi

Sajadi

2018

Applied Organom Chemis

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“…28. The capacity of Eu 3þ is greater than that of Co 2þ which is greater than that of Cs þ , this may be attributed to that the multivalent ions have a greater complexing ability than the monovalent one (30).…”

Section: Column Systemmentioning

confidence: 96%

Removal and Separation of Some Radionuclides by Poly-acrylamide Based Ce(IV) Phosphate from Radioactive Waste Solutions

Metwally

El-Gammal

Aly

et al. 2011

Separation Science and Technology

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Removal of cesium, cobalt, and europium ions from radioactive waste solutions using poly-acrylamide based Ce(IV) phosphate material was investigated using both batch and fixed bed column techniques. The effect of pH, initial metal ion concentration, and temperature had been studied. Simple kinetic and thermodynamic models had been applied from which the mechanism of the process and the thermodynamic parameters were determined. The positive values of enthalpy change, DH, obtained for the three metal ions confirmed the endothermic nature of the sorption process and suggested that chemisorption is the predominant sorption mechanism. The high positive values found for the entropy change, DS, show the increased randomness at the solid/solution interface. The obtained negative values of free energy change, DG, indicating the feasibility and the spontaneous nature of the sorption processes. Breakthrough data were investigated in a fixed bed column at room temperature (298 K) under the effect of various process parameters like bed depth, flow rate, and initial ion concentration. The results showed that the overall bed capacity decreased with increasing flow rate and increased with increasing initial metal ion concentrations and bed depth.

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“…According to Debye-Hü ckel theory, in the used diluted alkali metal ion solutions, the activity coefficient may be neglected, and the selectivity coefficient can be defined by the following equation 59 : …”

Section: Recovery Of Alkali Metal Ionsmentioning

confidence: 99%

Preparation of unsaturated polyester–styrene beads using gamma irradiation and chemical polymerization routes for use in the recovery of some alkali metal ions

El‐Nahas

Khalil

Ibrahim

et al. 2007

J of Applied Polymer Sci

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Suspension polymerization of unsaturated polyester-styrene was carried out in different media using different routes of polymerization. The effects of matrix type and concentration hold up, viscosity, irradiation dose, and the agitation speed on the resultant polymer characteristics were examined. The formed beads were physically identified using scanning electron microscopy, hardness, and particle size analysis techniques. They were smooth having typical spherical surfaces; the beads diameters were in the range of about 5-200 mm. The size of the resin beads was found to decrease with increase in the concentration and viscosity of the dispersant and impeller speed. The resultant beads were applied in the recovery of Li þ , Na þ , K þ , and Cs þ ions from acidic media. The distribution coefficients of the alkali metal ions were calculated; the order of selectivity wascase of the chemically processed resin beads, while the selectivity lies in the order of Li þ < Na þ < K þ < Cs þ in case irradiation processed ones. Finally, the economics of production of the unsaturated polyesterstyrene resins using different methodologies was studied.

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Chromatographic separation of sodium, cobalt and europium on the particles of zirconium molybdate and zirconium silicate ion exchangers

Cited by 50 publications

References 22 publications

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Green synthesis of Cu/zirconium silicate nanocomposite by using Rubia tinctorum leaf extract and its application in the preparation of N‐benzyl‐N‐arylcyanamides

Removal and Separation of Some Radionuclides by Poly-acrylamide Based Ce(IV) Phosphate from Radioactive Waste Solutions

Preparation of unsaturated polyester–styrene beads using gamma irradiation and chemical polymerization routes for use in the recovery of some alkali metal ions

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