Kinetics of sorption of uranium(VI) compounds with zirconium-silica nanosorbents

Perlova, O. V.; Sazonova, V. F.; Perlova, N. A.; Yaroshenko, N. A.

doi:10.1134/s0036024414060223

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…Investigation of the preparation and characterization of Fe3O4/PVA/APSCGs sorbent prepared from alkaline pretreated spent coffee grounds have been published in our articles [13,14]. The results showed that the APSCGs have a significant amount of functional groups as carbonyl, carboxyl, hydroxyl on Fe3O4/PVA/APSCGs surfaces and these functional groups can be potential adsorption centers.…”

Section: Resultsmentioning

confidence: 96%

“…It is known that if the correlation coefficient (R 2 ) is closely related to dependencies, then the diffusional kinetics predominates over the limiting stage of those sorption process [14]. The results of the experimental data showed in Table 1.…”

Section: Resultsmentioning

confidence: 97%

“…In addition, the saturation magnetization of the Fe3O4/PVA/APSCGs sorbent was 21.5 emu/g, which is lower than the synthesized magnetite powder 73.6 emu/g but enough to separate sorbents after adsorption process. Using this technique, we were able to remove up to 95% of the sorbents from the solution [13,14].…”

Section: Resultsmentioning

confidence: 99%

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Investigation of sorption mechanism of methylene blue, congo red and tannic acid from aqueous solutions onto magnetic composite sorbent obtained from alkaline pretreated spent coffee grounds

Thanh

Van

2021

BIO Web Conf.

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In this article, a novel magnetic composite material obtained from alkaline pretreated spent coffee grounds was used for investigating of the sorption mechanism of methylene blue, congo red and tannic acid from aqueous solutions. In order to clarify mechanisms were analyzed the adsorption kinetics models (external and internal diffusion; chemical kinetics (pseudo-first order, pseudo-second order); intraparticle diffusion) and the adsorption thermodynamics. The results showed that the sorption of all studied sorbates was controlled by a mixed diffusion model and a pseudo-second order and diffusion rate revealed three stage of the mass transfer. The adsorption process of methylene blue, congo red and tannic acid onto Fe3O4/PVA/APSCGs sorbent was spontaneous and endothermic. Based on the results, it was concluded that the mechanism for removal of the studied sorbates by adsorption onto Fe3O4/PVA/APSCGs sorbent may be assumed both physisorption and chemisorption.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 97%

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Investigation of sorption mechanism of methylene blue, congo red and tannic acid from aqueous solutions onto magnetic composite sorbent obtained from alkaline pretreated spent coffee grounds

Thanh

Van

2021

BIO Web Conf.

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“…If the composite is based on inert polymer [ 16 ], its sorption capacity is insignificant. Some types of composites are suitable only for anion removal [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Perlova

Dzyazko²,

Perlova

et al. 2017

Nanoscale Res Lett

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Organic-inorganic ion-exchangers were obtained by incorporation of zirconium hydrophosphate into gel-like strongly acidic polymer matrix by means of precipitation from the solution of zirconium oxychloride with phosphoric acid. The approach for purposeful control of a size of the incorporated particles has been developed based on Ostwald-Freundich equation. This equation has been adapted for precipitation in ion exchange materials. Both single nanoparticles (2–20 nm) and their aggregates were found in the polymer. Regulation of salt or acid concentration allows us to decrease size of the aggregates approximately in 10 times. Smaller particles are formed in the resin, which possess lower exchange capacity. Sorption of U(VI) cations from the solution containing also hydrochloride acid was studied. Exchange capacity of the composites is ≈2 times higher in comparison with the pristine resin. The organic-inorganic sorbents show higher sorption rate despite chemical interaction of sorbed ions with functional groups of the inorganic constituent: the models of reaction of pseudo-first or pseudo-second order can be applied. In general, decreasing in size of incorporated particles provides acceleration of ion exchange. The composites can be regenerated completely, this gives a possibility of their multiple use.

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Advanced Carbon Nanomaterials and Their Composites for Removal of U(VI)Compounds from Aqueous Solutions (Review)

Dzyazko

Perlova²,

Martovyi³

2023

Springer Proceedings in Physics

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Kinetics of sorption of uranium(VI) compounds with zirconium-silica nanosorbents

Cited by 8 publications

References 4 publications

Investigation of sorption mechanism of methylene blue, congo red and tannic acid from aqueous solutions onto magnetic composite sorbent obtained from alkaline pretreated spent coffee grounds

Investigation of sorption mechanism of methylene blue, congo red and tannic acid from aqueous solutions onto magnetic composite sorbent obtained from alkaline pretreated spent coffee grounds

Formation of Zirconium Hydrophosphate Nanoparticles and Their Effect on Sorption of Uranyl Cations

Advanced Carbon Nanomaterials and Their Composites for Removal of U(VI)Compounds from Aqueous Solutions (Review)

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