This work is devoted to the study of adsorption strontium, yttrium, and zirconium ions by strong acid cation exchange resin Dowex HCR-s/s. The in batch dynamic conditions from individual solutions studied elements, as well their mixture, was studied. It shown that dependences on agitation time fit with pseudo-first-order Elovich equations. Equilibrium all three cations can be described Langmuir's theory. Column has HCR-s/s adsorb investigated acidic medium. inductively coupled plasma mass...

Dependence of zirconium adsorption value on agitation time, solution acidity, equilibrium concentrations cations, and zeolite NaX particle size was investigated. The two most common theories Langmuir Freundlich, were used to analyzing data. Nonlinear approximation shows that the Freundlich theory provides higher R2 lower χ2 for by than theory. Experimental maximum values toward strontium cations are 75 mg·g-1 156 mg·g-1, respectively. desorption studies ions from surface 1% oxalic acid 10%...

The adsorption of yttrium cations from an aqueous solution YCl3 by sodium-modified titanium dioxide (Na-TiO2) was investigated. Na-TiO2 obtained impregnating Na+ into the surface layer TiO2 nanoparticles. synthesis nanoparticle performed a liquid-phase sol-gel method, using aqua complex [Ti(OH2)6]3+‧3Cl- as precursor. Nanoheterostructured is anatase modification TiO2. amount incorporated sodium on about 6%. area 239 m2‧g-1; volume mesopores 0.098 cm3‧g-1; that micropores 0.054 cm3‧g-1....

In this paper, the adsorption of trivalent chromium cations by a sample sodium-modified TiO2 was studied. XRF analysis surface performed. The dependence value on duration interaction in system adsorbent–solution compound investigated. influence acidity solution and equilibrium concentration ions also determined. It is shown that kinetics best described pseudo-second-order equation diffusion kinetic model. Freundlich's theory describes adsorption. Mass spectrometry proved enhanced from...

In the present paper mesoporous TiO2 with chemosorbed carbonate groups was investigated as an adsorbent for removal of Zn2+ and Ba2+ cations from aqueous solutions. The dependence adsorption values on agitation time, solution’s acidity, modification surface determined. process fit well by Lagergren’s pseudo-second-order kinetic model. equilibrium in concentration heavy metal’s ranges 27.46 mg/L - 7809 mg/L. experimental data approximated Langmuir DubininRadushcevich theories. energy onto...

Introduction shows the important of this scientific direction. 60 Co with half-life 5.3 years is one few anthropogenic, gamma-emitting radionuclides, that can be detected in aquatic environments affected by liquid effluent discharged from nuclear facilities. The need for control content environment, determines search new adsorption materials high capacity and chemical, thermal, radiation resistance. aim present work to investigate 2+ mesoporous TiO 2 aqueous solutions. Experimental...

This paper describes the testing of titanium dioxide, chemically modified by arsenate groups, as an adsorbent 90Sr from component aquatic ecosystems Chornobyl exclusion zone. It is shown, that chemical composition environment impacts adsorption. The 4As-TiO2 reduces activity some samples almost 100 %, which indicates selectivity and high adsorption capacity in relation to 90Sr. In experiments, this value reached was reduced level maximum permissible concentration.

Abstract This work studies the adsorption of zirconium ions by mesoporous titanium dioxide with surface arsenate groups. Experimental maximal values were found to be 109.6 mg/g in neutral medium. process depends on interaction time, equilibrium concentration ions, and acidity solution. Adsorption kinetics fit well into kinetic model based pseudo-second-order equation ( R 2 = 0.9984). Equilibrium is described Langmuir’s theory 0.9856 χ 1.307). Although are less actively adsorbed from a medium...

The adsorption of Sr(II) cations by Boron-doped TiO2 was investigated. adsorbent samples were obtained liquid-phase sol-gel method using the aqua complex precursor [Ті(ОН2)6]3+‧3Cl- and modifying reagent hydrogen borate Н3ВО3. It found, that single-phase rutile titanium dioxide or two-phase anatase-rutile oxide materials formed under different initial ratios components. Boron atoms are combined with Oxygen into triangular structural cell ВО3 in sample 0.5В-ТіО2 localized surface layer...

This work studies the adsorption of zirconium ions by mesoporous titanium dioxide and sodium-modified dioxide. Experimental maximal values H-TiO2 Na-TiO2 were found to be 64 mg/g 109,5 respectively. process depends on interaction time, equilibrium concentration acidity solution. Adsorption kinetics fit well into diffusion kinetic model indicate a several stages adsorption. Equilibrium is described Langmuir's theory for both adsorbents. The results obtained inductively coupled plasma mass...

It was established that incomplete substitution of free silanols fumed silica surface on (CH3)3Si-groups leads to an increase in the ability modified SiO2 adsorb Ba2+ cations from electrolyte solution. Silica with 48.3% trimethylsilyl (TMS) groups adsorbs 1.8 mmol·g-1 0.01 M BaCl2 solution, 3 times more than adsorption these by unmodified silica. found basic and is well described pseudo-second order Lagergren equation. The high activity chemisorbed TMS-groups due formation local regions...

This paper is devoted to the adsorption capacity of titanium silicate toward Ba2+ cations. Titanium can be synthesized from production waste by sol-gel synthesis, which additional benefit environmental protection. The determination surface area adsorbent was performed method low-temperature N2 adsorption-desorption isotherm. elemental composition also investigated XRF and EDS analysis. dependence values on duration interaction, equilibrium concentration adsorbate, acidity solution has been...

The physic-chemical properties of ash extracted from smoke during the combustion coal at Burshtyn thermal power plant were investigated. particles formed in flame are crystallized glass beads with a size 0.8–600 μm. It was found that heterogeneous their chemical composition. mass content ferric oxides can vary 2.1% to 96.4%, however, despite this, Al2O3/SiO2 ratio balls remains constant value 0.47±0.02. Phase analysis confirmed presence α-quartz (~ 62 wt%), mullite 32 wt%) and α-FeOOH,...

The aim of the present work is titanium silicate influence on zinc and strontium migration in aquatic environment. adsorption capacity toward ions was investigated. With aid a fluorescent X-ray analyzer energy dispersive spectroscopy composition sorbent formed determined as well presence surface after sorption process. It shown, that by strongly depends time interaction solution acidity increases with increasing both parameters. established, for initial concentration at level 0.005M cause...