Exploration of the parameters affecting the europium removal from aqueous solutions by novel synthesized titanium phosphates

Kapnisti, Maria; Noli, F.; Papastergiadis, Efthimios; Pavlidou, E.

doi:10.1016/j.jece.2018.05.010

Cited by 23 publications

(11 citation statements)

References 51 publications

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“…A literature review shows that The mass transfer stages, especially external diffusion, are not considered thoroughly when The kinetic properties of titanium phosphates are studied. The authors' attention is usually focused on The study of The fourth stage (sorption) using pseudo-first-or pseudo-second-order reactions models [13,22,23]. At The same time, diffusion can also have a significant effect on The overall rate of The sorption process.…”

Section: Introductionmentioning

confidence: 99%

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Маслова

Иваненко

Yanicheva

et al. 2020

IJMS

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The treatment of heavy metal-contaminated wastewater is an important action to reduce The negative impacts of industrial wastes on water bodies. This work focuses on The application of a low-cost titanium (IV) phosphate sorbent of TiO(OH)H2PO42H2O chemical composition toward lead and zinc ions depending on their concentration and The temperature of The solution. The kinetic studies showed that The values of The rate of intraparticle diffusion and The effective diffusion coefficients for Zn2+ were considerably higher than those for Pb2+. To explain The difference between The sorption kinetics rates for Pb2+ and Zn2+, The effective radius and dehydration degree of The adsorbed ions were calculated. The sorbent capability of The lead and zinc ion removal and its excellent efficiency in The presence of a high concentration of calcium ions were demonstrated using simulated mine water. Due to The fast kinetics and The high exchange capacity of titanium phosphate toward divalent ions, this sorbent can be considered as a promising material for The concentration and immobilization of heavy metals into The phosphate matrix.

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Section: Introductionmentioning

confidence: 99%

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Маслова

Иваненко

Yanicheva

et al. 2020

IJMS

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“…A literature survey showed that studying the kinetic properties of titanium phosphates has not been given due attention. Authors have usually focused on the investigation of sorption steps using chemical adsorption reaction models [ 21 , 22 , 23 ]. Meanwhile, the diffusion stage can have a marked effect on the overall rate of the sorption process.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Purification of Saturated LiNO3 Solution Using Titanium Phosphate Ion Exchanger: Kinetics Study

Маслова

Иваненко

Evstropova

et al. 2022

IJMS

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Lithium compounds are of high interest to many industries. The presence of undesirable impurities in Li precursors leads to uncontrolled change in the functional properties of final compounds. Therefore, the development of reliable methods for lithium salt purification is considered a key factor for their application in various industries. This work focuses on the application of a titanium phosphate ion exchanger (Li-TiOP) toward Cu2+, Co2+, Mn2+, Ni2+, and Cr3+ ions in the purification of a saturated LiNO3 solution. The sorption kinetics of the selected ions, considering external and internal mass transfer, as well as chemical interaction, were deeply studied. The kinetic study showed that the values of intraparticle diffusion rate and effective diffusion coefficients for the studied ions decreased in the following order: Cr(III) Cu(II) Mn(II) ˃ Co(II) ˃ Ni(II). For all the selected ions, chemical interaction was described with a pseudo-second-order reaction model. The sorption kinetics were controlled by the size of the solvated metal ion, its effective charge, the electronic structure of the adsorbed ion, and the interaction with the functional groups of the sorbent. Due to fast kinetics, the high degree of removal of trace quantities of the impurities this material gives it consideration as a promising sorbent for the deep purification of lithium salts.

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“…As a representative member of lanthanides, europium typically appears in the trivalent state (+3) and in some cases exhibits the divalent state (+2). [ 2 ] The radioisotopes of europium are usually used as burn‐up monitors to evaluate the performance and characteristics of reactors fuels. [ 3 ] 152+154 Eu is considered as one of the important constituents of radioactive wastewater because it emits hard γ‐rays with relatively high energy and has long half‐life amounting to 13.54 and 8.5 years.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Sorptive Ability of Synthesized Graphene Oxide‐Metal Oxide Composite to Remove Certain Lanthanides

Sheha

Mekawy

Someda

et al. 2020

CLEAN Soil Air Water

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A metal oxide decorated graphene oxide composite (GO-MO) is prepared via fixation of manganese dioxide (MnO 2) on the surface of graphene oxide (GO). The composite is used as a sorbent for the separation of europium and cerium ions from aqueous solutions. The synthesized materials are characterized using scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy. The role of different variables on the sorptive ability of these materials is studied. Two simplified kinetic models, pseudo-first order and pseudo-second order, are applied to describe the kinetics of the sorption process. It is found that sorption of Eu(III) and Ce(III) ions on the synthesized sorbents could be described more favorably by the pseudo-second-order kinetic model. Sorption data are analyzed with Freundlich and Langmuir isotherm models. Desorption of europium and cerium ions from loaded sorbents is carried out using different eluents. Eu(III) ions are easily desorbed from loaded samples using 0.01 m EDTA while Ce(III) ions are easily eluted using 0.01 m AlCl 3. The obtained data clarify that the synthesized composite could be considered as a promising candidate for preconcentration and separation of some lanthanide elements from aqueous solutions.

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Exploration of the parameters affecting the europium removal from aqueous solutions by novel synthesized titanium phosphates

Cited by 23 publications

References 51 publications

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Comparison of The Sorption Kinetics of Lead(II) and Zinc(II) on Titanium Phosphate Ion-Exchanger

Investigation on Purification of Saturated LiNO3 Solution Using Titanium Phosphate Ion Exchanger: Kinetics Study

Assessing the Sorptive Ability of Synthesized Graphene Oxide‐Metal Oxide Composite to Remove Certain Lanthanides

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