Radiochemical studies of state of lanthanum microamounts in water solution

Vasylyeva, Hanna; Стрелко, В. В.; Patrylyak, S.M.; Yakovlyev, N.N.; Pylypchenko, V.A.; Хіміч, І. В.

doi:10.1016/j.molliq.2004.07.008

Cited by 6 publications

(2 citation statements)

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“…The mixture was removed at a specified interval of time, and residual concentration of Sr 2+ and Y 3+ was analyzed using complexonometric titration [6,7]. For Y 3+ , spectrophotometric analysis was also used [8]. The amount of adsorbed Sr 2+ or Y 3+ was calculated using the concentration in solutions before and after the adsorption process.…”

Section: Methodsmentioning

confidence: 99%

SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT

Myroniuk¹,

Vasylyeva²

2019

RAD Conference Proceedings

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In present investigations, the sorption removal of Sr 2+ and Y 3+ ions from aqueous solutions by TiO2 -La sorbent was researched. The dependence of the sorption process on the time of interaction, solution's acidity, and initial concentrations of the Sr 2+ and Y 3+ ions were investigated. Four simplified kinetic models -Lagergren's pseudofirst and pseudo-second order kinetic models, Intra-particle diffusion and Elovich models -were tested to describe the adsorption process. Equilibrium isotherms data were analyzed using Langmuir and Freundlich isotherm models. The kinetic data indicated that the adsorption of Sr 2+ and Y 3+ ions by ТіО2-La fitted well with the pseudo-second order kinetic model with coefficients of linear approximation (R 2 = 0.99) for both elements. The application of the Elovich model to the experimental data of the sorption of Sr 2+ and Y 3+ ions by ТіО2-La shows that yttrium is absorbed due to the mechanism of chemisorption. Coefficient of linear approximation R 2 = 0.98. Strontium is absorbed via physical sorption or ion exchange mechanism. The maximum adsorption capacity of ТіО2 -La was found to be 0,9 mmol·g -1 (79 mg g -1 ) for Sr 2+ and 1.6 mmol·g -1 (134 mg·g -1 ) for Y 3+ .

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Section: Methodsmentioning

confidence: 99%

SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT

Myroniuk¹,

Vasylyeva²

2019

RAD Conference Proceedings

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“…Adsorption technologies are widely used to solve environmental problems at present time. In particular, the synthetic adsorbentsactivated carbon, zeolites, metal oxide-adsorbents Fe3O4, ZnO, TiO2, titanium or zirconium phosphates, ion exchange resins, etc., are often used for the removal of heavy metal cations Pb (II), Cd (II), Ba (II), Hg (II), Sr (II) as well as some anions AsO4 3-, SeO4 2-, Ffrom the aquatic environment [1][2][3][4][5]. The disadvantage of known adsorbents is low adsorption capacity, instability to aggressive media, or complexity of synthesis.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Sr(II) cations onto titanium dioxide, doped with Boron atoms

Mironyuk

Vasylyeva

Prokipchuk

et al. 2023

Phys. Chem. Solid St.

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The adsorption of Sr(II) cations by Boron-doped TiO2 was investigated. The adsorbent samples were obtained by liquid-phase sol-gel method using the aqua complex precursor [Ті(ОН2)6]3+‧3Cl- and modifying reagent hydrogen borate Н3ВО3. It was found, that single-phase rutile titanium dioxide or two-phase anatase-rutile oxide materials were formed under the different initial ratios of components. Boron atoms are combined with Oxygen atoms into triangular structural cell ВО3 in the rutile sample 0.5В-ТіО2 and are localized in the surface layer of the nanoparticle material as a grouping =О2ВОН. The introduction of Boron atoms into the structure of the rutile adsorbent causes an increase in its adsorption capacity for the binding of Sr(II) cations in the aqueous electrolyte. The maximal adsorption values for Sr(II) cations by the rutile adsorbent in a neutral electrolyte environment reach 102.3 mg‧g-1, while it is equal to 68.8 mg‧g-1 for the unmodified anatase adsorbent a-TiO2. The number of acid adsorption centers ≡ТіОНδ+ on the surface of the rutile adsorbent 0.5В-ТіО2 is ~ 50 units on a surface area of 10 nm2, which is twice the number of centers on the surface of the anatase adsorbent a- ТіО2. Anatase-rutile adsorbents 1.0В-ТіО2 and 1.5В-ТіО2 contain, respectively, 70% and 57% of the anatase phase. They are significantly inferior in adsorption ability toward cations of Sr(II) compared with the rutile adsorbent 0.5В-ТіО2. This is because Boron atoms are mainly localized in the anatase phase and with oxygen atoms form tetrahedral groups of ВО4-.

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Preparation and characterization of titanium tungstophosphate immobilized on mesoporous silica SBA-15 as a new inorganic composite ion exchanger for the removal of lanthanum from aqueous solution

Ahmadi

Yavari

Yeganeh-Faal

et al. 2016

J Radioanal Nucl Chem

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Radiochemical studies of state of lanthanum microamounts in water solution

Cited by 6 publications

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SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT

SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT

Adsorption of Sr(II) cations onto titanium dioxide, doped with Boron atoms

Preparation and characterization of titanium tungstophosphate immobilized on mesoporous silica SBA-15 as a new inorganic composite ion exchanger for the removal of lanthanum from aqueous solution

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Radiochemical studies of state of lanthanum microamounts in water solution

Cited by 6 publications

References 0 publications

SORPTION REMOVAL OF Sr2+ AND Y3+ IONS FROM AQUEOUS SOLUTIONS BY A TiO2 -BASED SORBENT

SORPTION REMOVAL OF Sr2+ AND Y3+ IONS FROM AQUEOUS SOLUTIONS BY A TiO2 -BASED SORBENT

Adsorption of Sr(II) cations onto titanium dioxide, doped with Boron atoms

Preparation and characterization of titanium tungstophosphate immobilized on mesoporous silica SBA-15 as a new inorganic composite ion exchanger for the removal of lanthanum from aqueous solution

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Product

Resources

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SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT

SORPTION REMOVAL OF Sr²⁺ AND Y³⁺ IONS FROM AQUEOUS SOLUTIONS BY A TiO₂ -BASED SORBENT