Composite cation-exchange resins containing zirconium hydrophosphate for purification of water from U(VI) cations

Dzyazko, Yuliya; Perlova, O. V.; Perlova, N. A.; Volfkovich, Yury M.; Сосенкин, В. Е.; Trachevskii, V. V.; Sazonova, V. F.; Palchik, A.V.

doi:10.5004/dwt.2017.0686

Cited by 21 publications

(5 citation statements)

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“…At the same time, heterogeneous cation exchange membranes modified with ZHP and anion exchange membrane containing HZD nanoparticles show higher selectivity towards Ca 2+ , Mg 2+ and H2PO4 -(HPO4 2-) ions in comparison with pristine materials [29,107]. As shown, zirconium hydrophosphate increases transport number ( t ) for the cation exchange membrane.…”

Section: Diffusion Foundations Vol 23mentioning

confidence: 85%

“…Ratio of volumes of different pores. The parameters, which are obtained from distributions of pore volume, are following: (i) ratio of volumes of transport pores and pores, which are free from functional groups (α ) [29,61,62,107], (ii) a ratio of volumes of channels and clusters ( γ ) [29,61,107]. Earlier micropores were excluded from the α parameter, asymmetry of peaks of 120 Diffusion Foundations Vol.…”

Section: H Omentioning

confidence: 99%

“…However, they squeeze transport pores. This provides formation of sorption centers, which are selective towards large ions, such as UO2 2+ [107]. The resin containing agglomerates can be used for preferable removal of toxic ions from water containing also Ca 2+ and Mg 2+ [62].…”

Section: Modifier Content Electrical Conductivitymentioning

confidence: 99%

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Ionic Transport in Sol-Gel Derived Organic-Inorganic Composites

Dzyazko

Volfkovich

2019

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This chapter is devoted to organic-inorganic composite ion exchange resins and membranes. We ascertain interrelation between composition, morphology and porous structure of the materials on the one hand and ion transport through them on the other hand. The composites for different practical application (fuel cells, ion exchange columns, electrodialysis) are in a focus of attention. Porosity of a polymer constituent of the composite was determined with a method of standard contact porosimetry, which gives information about pores in a very wide diapason (from 2 nm to 200 μm). In this context, pore formation in ion exchange polymers during swelling is considered. A number of parameters, which are obtained from porosimetric measurements, can be used for interpretation of ion transport regularities, particularly evolution of electrical conductivity. Embedded non-aggregated nanoparticles, their aggregates and agglomerates affect differently porosity of the polymer constituent: they are able to block, stretch and squeeze pores, As a result, the composites demonstrates different rate of ion transport depending on amount and size of the inorganic particles. The approach to purposeful formation of one or other types of particles has been proposed.

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Section: Diffusion Foundations Vol 23mentioning

confidence: 85%

Section: H Omentioning

confidence: 99%

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Ionic Transport in Sol-Gel Derived Organic-Inorganic Composites

Dzyazko

Volfkovich

2019

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“…The usage of polymer-inorganic resins [44][45][46][47][48][49][50][51][52][53][54] are directed to the removal of toxic ions (Ni 2+ [44,47,49,50], Cd 2+ [47,48], UO2 2+ [46], cationic dye [50]) from water containing also Mg 2+ and Ca 2+ ions. However, the hardness ions are removed simultaneously.…”

Section: Polymer-inorganic Resinsmentioning

confidence: 99%

“…Strongly acidic Dowex HCR-S [44][45][46][47][48][49][50] and weakly acidic Dowex MAC-3 [50] cation exchange resins were applied after modifying with inorganic constituents. Zirconium hydrophosphate was used as a modifier, since its functional groups were able to form complexes of multicharged ions being sorbed [54].…”

Section: Polymer-inorganic Resinsmentioning

confidence: 99%

Applications of Ion Exchange Resins in Water Softening

Dzyazko

2023

Materials Research Foundations

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Surface and groundwater always contain hardness ions (Ca2+ and Mg2+). The hardness is an important characteristic that provides the consumer properties of water. This parameter must be taken into consideration by the stations of water treatment, thermal power plants, the enterprises of chemical, food, pharmaceutical industries. Ion exchange resins, which are intended for water softening, are considered in this chapter. The negative effect of hardness ions on human health and equipment is also a focus of attention. Special approaches for increasing the efficiency of water softening are also reported. These approaches involve combining ion exchange with electrodialysis or ultrasound.

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