Synthesis, characterization and analytical application of a new inorganic cation exchanger—Titanium(IV) molybdophosphate

Yavari, R.; Ahmadi, Seyyed Javad; Huang, Yudong; Khanchi, Ali Reza; Bagheri, G.; He, Jiaojie

doi:10.1016/j.talanta.2008.08.026

Cited by 33 publications

(16 citation statements)

References 16 publications

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“…2 shows the FT-IR spectra for TV and LTV (I and II). In all spectra, the band around 3,430 cm −1 due to stretching mode of free water [23] and O-H group with the band at 1,626 cm −1 may be attributed to deformation vibration of free water [21,24]. The band at 986, 982, and 985 cm −1 in TV, LTVI, and LTVII, respectively may be due to the presence of vanadate ions [8,21].…”

Section: Physical Characterization Of the Synthesized Ion Exchangersmentioning

confidence: 82%

Sorption performance of lithium-doped titanium vanadate for Sr2+, Fe3+ and Al3+ from polluted water

Ali

Gomaa

Naggar

et al. 2016

Desalination and Water Treatment

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2015): Sorption performance of lithium-doped titanium vanadate for Sr 2+ , Fe 3+ and Al 3+ from polluted water, Desalination and Water Treatment,Lithium-doped semicrystalline titanium vanadate (TV) with enhanced sorption properties was obtained using one step precipitation method. Employing this technique at different precipitation conditions produced two lithium-modified forms (LTVI and LTVII). The materials were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), simultaneous thermal analysis (DTA/TGA), and scanning electron microscopy (SEM). Stability of the materials was investigated. The XRD patterns of different vanadate forms revealed poor crystalline nature with minor changes. Distribution coefficient (K d ) of Sr 2+ , Fe 3+ , and Al 3+ on different vanadate forms was studied and it was found that the selectivity order is Sr 2+ > Fe 3+ > Al 3+ . In addition, it can be seen that LTVI (of higher Li + content) shows the higher sorption efficiency, mechanical, and chemical stability compared to the other forms. The dependence of sorption capacity of LTVI on annealing temperature was also studied. The study of binary separation of metal ions showed that LTVI can be potentially useful for analytical applications. Thermodynamic parameters of the exchange process employing the Van't Hoff equation announced that the exchange reactions are endothermic and spontaneous. Langmuir and Freundlich isotherm models were applied to the experimental data to examine the exchange mechanism.

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Section: Physical Characterization Of the Synthesized Ion Exchangersmentioning

confidence: 82%

Sorption performance of lithium-doped titanium vanadate for Sr2+, Fe3+ and Al3+ from polluted water

Ali

Gomaa

Naggar

et al. 2016

Desalination and Water Treatment

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“…As can be seen, the composite of ion exchanger is quite stable in water and fairly stable in mineral acids even in high concentration, while it is less stable in basic solutions. This chemical stability may be due to the presence of binding polymer, which can prevent the dissolution of heteropolyacid salt or leaching of any constituent elements into the solution (Yavari et al 2009). …”

Section: Resultsmentioning

confidence: 99%

“…These materials are known to possess the better properties such as ion exchange capacity and selectivity in comparison with the normal salts of multivalent metals. The selectivity may be enhanced by varying the composition of materials (Yavari et al 2009;Maragheh et al 1999). One of the well-known polyoxometalates is stannic molybdophosphate (SMP) (Gupta et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Evaluation, characterization and analytical application of a new composite material for removing metal ions from wastewater

Yavari¹,

Ahmadi²,

Farkhondehru³

et al. 2014

Int. J. Environ. Sci. Technol.

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A new organic/inorganic composite based on polyacrylonitrile and stannic molybdophosphate (PAN-SMP) as an adsorbent was synthesized under various conditions. The physicochemical properties of this material were specified by elemental analysis, scanning electron microscopy, infrared spectroscopy and thermogravimetry studies. The synthesized material was found to be stable in demineralized water, in dilute acids, under gamma radiation up to the total radiated of 100 kGy doses and in high temperature up to 500°C. Ion exchange capacity of the synthesized composite and its distribution coefficient (K d ) for several metal ions were determined. The results showed that PAN-SMP has a great affinity toward some metal ions such as T

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“…Others, encouraging results with ammonium molybdophosphate/transition metal hexacyanoferrate immobilized on diverse supports (mesoporous silica and polymer resins), presented as bulk materials or nanocomposites were reported for the decontamination of cesium ions recently [10][11][12][13][14][15]; however, they have questionable thermal stability at the elevated temperatures generated by decay energy. Ternary acidic salts of multivalent metal were used to achieve the analytical separations of heavy-metal ions [16][17][18], few of which were focused on the removal of Cs + and Sr 2+ . Generally, the extreme conditions of the high-level liquid waste have been disabling any material to separating both cations from other radionuclides commendably.…”

Section: Introductionmentioning

confidence: 99%

Ion-exchange properties of ternary CaO–MgO–Al2O3 spinels in pH-controlled aqueous radioactive waste solutions

El-Gammal

Hamid

Ibrahim

2015

Desalination and Water Treatment

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O 45 , corundum, periclase, and monoxide lime were detected at room temperature, while CaAl 2 O 4 and MgAl 2 O 4 spinels were ascertained at 1,200-1,400 and 1,725-1,900˚C, respectively. They were characterized using scanning electron microscopy, X-ray diffraction, X-ray fluorescence, FTIR, DTA-TGA, N 2 -gas adsorption, and laser diffraction particle size analyzer. We proved that they are chemically and thermally stable in their face-centered array spinel configurations with different surface, morphological, and topographical structures. They were used for removal of 134 Cs + , 60 Co 2+ , and 152−154 Eu 3+ from waste solutions; preliminary kinetic and pH were investigated. Langmuir, Freundlich, Dubinin-Radushkevich, Temkin, Harkins-Jura, and Halsey isothermal prototypes were applied to describe the equilibria between adsorbed phase metal ions and those in solution at different concentrations. The adsorption of 134 Cs + , 60 Co 2+ , and 152−154 Eu 3+ was critically affected by temperatures and ambient pH; spontaneous and exothermic nature of adsorption was found at specific pH values, beyond which the adsorption is restricted. The mechanism of adsorption was found to be chemical reaction combined with ion exchange rather than pure ion exchange.

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Synthesis, characterization and analytical application of a new inorganic cation exchanger—Titanium(IV) molybdophosphate

Cited by 33 publications

References 16 publications

Sorption performance of lithium-doped titanium vanadate for Sr2+, Fe3+ and Al3+ from polluted water

Sorption performance of lithium-doped titanium vanadate for Sr2+, Fe3+ and Al3+ from polluted water

Evaluation, characterization and analytical application of a new composite material for removing metal ions from wastewater

Ion-exchange properties of ternary CaO–MgO–Al2O3 spinels in pH-controlled aqueous radioactive waste solutions

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