Аdsorption of Co2+ and radioactive 60Со by mesoporous TiO2

Vasylyeva, Hanna; Mironyuk, Ivan; Mykytyn, Igor

doi:10.15407/hftp10.04.446

Cited by 2 publications

(2 citation statements)

References 20 publications

(56 reference statements)

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“…The initial and residual concentrations of Ca 2+ and Sr 2+ were determined using direct complexonometric titration with Eriochrom Black T as an indicator, as described in publications [1 -3, 10]. Adsorption value, as well as removed strontium percentage, which was removed (stable isotopes and 90 Sr radionuclides), were calculated according to [10,11] using equations ( 1) -( 4) as shown below:…”

Section: Sr Adsorption Study and Analysismentioning

confidence: 99%

“…Therefore, bivalent calcium influences the 90 Sr adsorption by TiO 2 from aquatic ecosystems. Adsorbents based on titanium dioxide can adsorb various divalent cations [10,19]. Since the adsorption of calcium ions by this adsorbent has not been investigated yet, test studies of the adsorption of Ca 2+ cations by 4As-TiO 2 (Table 5) were conducted.…”

Section: Influence Of Chemical Composition Of Scale On 90 Sr Adsorptionmentioning

confidence: 99%

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90Sr adsorption from the aquatic environment of Chornobyl exclusion zone by chemically enhanced TiO2

Mironyuk¹,

Mykytyn²,

Kaglyan³

et al. 2020

Nucl. Phys. At. Energy

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

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Section: Sr Adsorption Study and Analysismentioning

confidence: 99%

Section: Influence Of Chemical Composition Of Scale On 90 Sr Adsorptionmentioning

confidence: 99%

90Sr adsorption from the aquatic environment of Chornobyl exclusion zone by chemically enhanced TiO2

Mironyuk¹,

Mykytyn²,

Kaglyan³

et al. 2020

Nucl. Phys. At. Energy

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A new way to ensure selective zirconium ion adsorption

et al. 2021

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This work studies the adsorption of zirconium ions by mesoporous titanium dioxide with surface arsenate groups. Experimental maximal adsorption values of zirconium ions were found to be 109.6 mg/g in neutral medium. This process depends on the interaction time, the equilibrium concentration of zirconium ions, and the acidity of the solution. Adsorption kinetics fit well into the kinetic model based on the pseudo-second-order equation (R 2 = 0.9984). Equilibrium adsorption of zirconium ions is well described by Langmuir’s adsorption theory (R 2 = 0.9856 and χ 2 = 1.307). Although zirconium ions are less actively adsorbed from a neutral medium than strontium or yttrium ions, in the 2% nitric acid only zirconium is adsorbed out of the mixture of zirconium, strontium, and yttrium. The results obtained by inductively coupled plasma mass spectrometry have shown that the investigated adsorbent selectively adsorbs zirconium ions from their mixture with strontium and yttrium in the range of solution acidity pH = 0–1. The average percentage of maximum extraction of zirconium ions is 94.3 ± 2.4%, and the highest percent of zirconium ions taken up from the mixture with strontium and yttrium is ∼98.4%. Investigated titanium dioxide selectively separate 90Zr from 90Sr with the presence of 1000-fold excess of stable 88Sr in radioactive liquid β − source. This fact is extremely valuable for the age dating of 90Sr-containing device in nuclear forensics or the determination of 90Sr in low activity background samples.

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Аdsorption of Co2+ and radioactive 60Со by mesoporous TiO2

Abstract: Co, adsorbed onto TiO 2 is more than 90 %. The main conclusion is that mesoporous TiO 2 could be useful as an adsorbent for water purification from Co 2+ and in decontaminating of radioactive waste containing 60 Co.

Cited by 2 publications

References 20 publications

90Sr adsorption from the aquatic environment of Chornobyl exclusion zone by chemically enhanced TiO2

90Sr adsorption from the aquatic environment of Chornobyl exclusion zone by chemically enhanced TiO2

A new way to ensure selective zirconium ion adsorption

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