Synthesis and physico-chemical characterization of cellulose/HO7Sb3 nanocomposite as adsorbent for the removal of some radionuclides from aqueous solutions

Abdel-Galil, E. A.; Moloukhia, H.; Abdel-Khalik, M.; Mahrous, Sara S.

doi:10.1016/j.apradiso.2018.07.022

Cited by 26 publications

(13 citation statements)

References 29 publications

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“…Sample 4С-ТіО 2 is very efficient adsorbent toward Zn 2+ and Ba 2+ cations from their individual solutions as well as from their mixture. 4С-ТіО 2 able to compete with the best world analogues [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][20][21][22][23][24][25][26][27][28] (Table 6.).…”

Section: Ph Dependence Of Adsorption Of Ba 2+ and Zn 2+ By Modified Amentioning

confidence: 99%

“…For adsorption of Ba 2+ and Zn 2+ from water solutions a large number of adsorbents is offered: chitosan, lignocellulose-derived bio sorbents, α-cellulose, mixed silica-alumina oxide, activated fly ash, Na-bentonite, natural zeolite, activated carbon; sorbents based on Fe 2 O 3 , Al 2 O 3 , SiO 2 as well as TiO 2 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Barium and Zinc Ions by Mesoporous TiO2 with Chemosorbed Carbonate Groups

Vasylyeva

Mironyuk

Mykytyn

et al. 2019

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In the present paper the mesoporous TiO 2 with chemosorbed carbonate groups was investigated as an adsorbent for the removal of Zn 2+ and Ba 2+ cations from aqueous solutions.The dependence of the adsorption values of Zn 2+ and Ba 2+ on the agitation time, solution's acidity, and modification of surface of TiO 2 was determined. The process of Zn 2+ and Ba 2+ adsorption fit well by Lagergren's pseudo-second-order kinetic model. The equilibrium adsorption was investigated in the concentration of heavy metal's ranges 27.46 mg/L -7809 mg/L. The experimental data was approximated by Langmuir and Dubinin-Radushcevich adsorption theories. The energy of adsorption Zn 2+ and Ba 2+ onto modified TiO 2 and unmodified TiO 2 was calculated using Dubinin-Radushkevich equations, and was found to be 15.82 -9.399 kJ/mol, which corresponds to the mechanism of physical adsorption. The application of Langmuir theory to experimental adsorption data gives high R 2 , close to unit. Separation factor R L indicates, that adsorption Zn 2+ and Ba 2+ onto modified TiO 2 is very favorable.The mechanism of adsorption of bivalent cations by the modified sample is approximately the same. The difference in the adsorption of Zn 2+ compared with Ba 2+ is that cations of Zn 2+ (with small size) can diffuse into the micro pores of modified TiO 2 . The adsorption of Zn 2+ is not so strongly influenced by the presence of Ba 2+ , as in the adsorption of Ba 2+ the presence of Zn 2+ in the solution. This fact can be used for the separation of the Zn 2+ -Ba 2+ pair.Modified mesoporous ТіО 2 is very efficient adsorbent toward Zn 2+ and Ba 2+ cations from their individual solutions as well as from their mixture, and able to compete with the best world analogues.

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Section: Ph Dependence Of Adsorption Of Ba 2+ and Zn 2+ By Modified Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of Barium and Zinc Ions by Mesoporous TiO2 with Chemosorbed Carbonate Groups

Vasylyeva

Mironyuk

Mykytyn

et al. 2019

PCSS

View full text Add to dashboard Cite

show abstract

“…The adsorption value and separation factor were measured by equations (1) and (2): (1) where C o (mg/L) and C e (mg/L) initial and residual concentration of cations respectively; V (L) -volume of solution, m (g) -mass of adsorbent; A e -adsorption value (mg/g);…”

Section: Analysis Of Co 2+ and 60 Comentioning

confidence: 99%

“…The exposure time of the compound was at least 90 days [19]. The sample activity was detected by a scintillate spectrometer with NaI (Tl) crystal [1].…”

Section: Analysis Of Co 2+ and 60 Comentioning

confidence: 99%

“…Co with half-life of 5.3 years is one of the few anthropogenic, gamma-emitting radionuclides, that can be detected in aquatic environments affected by liquid effluent discharged from nuclear facilities. 60 Co forms by slow neutron capture in 59 Co, and exist in the materials of the internal structure of the reactor core [1]. In river environment, it can be measured up to 20 km down-stream of NPP.…”

Section: Introduction 60mentioning

confidence: 99%

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