Effect of Incorporated Inorganic Nanoparticles on Porous Structure and Functional Properties of Strongly and Weakly Acidic Ion Exchangers

Ponomarova, Ludmila; Dzyazko, Yuliya; Volfkovich, Yury M.; Сосенкин, В. Е.; Scherbakov, Sergey

doi:10.1007/978-3-319-92567-7_4

Cited by 6 publications

(3 citation statements)

References 58 publications

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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%

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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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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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“…The introduction of dispersed NPs into the porous matrix of an ion exchanger significantly changed the novel material's porous characteristic, ion transport, selectivity, and practical application in comparison with the pure resin (Li et al 2016). The effect of porosity on the functional properties of ion exchanger-based composites containing inorganic NPs was reviewed previously (Ponomarova et al 2018). Depending on the size and location of the NPs, they can block, stretch, or squeeze the pores of the polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

Anomalous effect of Cu2O and CuO deposit on the porosity of a macroreticular anion exchanger

et al. 2021

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When synthesizing copper compounds containing polymeric adsorbents, it was found that the two copper oxides, Cu2O and CuO, deposited in the skeleton of a strongly basic macroreticular anion exchanger (An) radically diminished the porosity of the obtained composites in relation to the host material. In order to investigate this phenomenon more closely, An/Cu2O and An/CuO (both based on the commercial anion exchanger Amberlite IRA900Cl), containing 8.6 and 8.2 wt% Cu, respectively, were subjected to scrutiny. The porous characteristics of the thermally dried and freeze-dried samples were determined using the N2 adsorption–desorption method and mercury intrusion porosimetry. The thermally dried samples lost their porosity and increased their bulk density in relation to the pure resin indicated a significant reduction in their volume. It was found that during drying, the grains shrank as much as the pores collapsed. The decay of the porous structure resulted from the surface morphology of the Cu2O and CuO particles and their tendency to agglomerate. Both freeze-dried samples retained the porous characteristics typical for macroporous anion exchangers. In contrast to the most popular hybrid ion exchangers containing hydrated polyvalent metal oxides (such FeOOH), An/Cu2O and An/CuO showed markedly strong volume contraction effect in relation to moisture content. Graphical abstract

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