The effect of silver ions and nanoparticles on the properties of ion-exchange materials

Шельдешов, Н. В.; Melnikov, Stanislav; Solov’eva, T. T.; Беспалов, А. В.; Levchenko, V. F.; Buikliskii, V. D.; Заболоцкий, В. И.

doi:10.1134/s1023193511020157

Cited by 5 publications

(1 citation statement)

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“…Water softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water. Cation exchange resins are known to be widely used in water purification equipment to soften water due to the long life of the resins and their cheap maintenance costs [1]. Our data of operating softening systems in hot climatic conditions of Uzbekistan has clearly demonstrated that a rapid contamination of the cation exchanger with microorganisms often occurs [2].…”

Section: Introduction *mentioning

confidence: 83%

Silver-containing Cation Exchange Resin: Synthesis and Application

Khaydarov¹,

Abdukhakimov²,

Garipov³

et al. 2022

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Cation exchange resins are widely used for water softening and demineralization all over the world. Deposition, metabolism, and growth of bacteria and fungi on the resin beads cause capacity and performance losses, especially during repeated use in cyclic and long-term operations. Over the last decades, modification of different materials by silver nanoparticles (AgNPs) has demonstrated to present significant opportunities in mitigating biofouling problems. The paper deals with a novel facile technique of introducing silver colloids (AgC) into cation exchange resin, providing the formation of silver micro- and nano-inclusions on the cation resin beads. The scanning electron microscope (SEM) measurements have confirmed a spherical shape and uniform distribution of AgC (50 – 1000 nm) on the surface of the resin. To evaluate the antibacterial and fungicidal properties of AgC on the cation resin beads, we have used Aureobasidium sp., Penicillium sp., and Staphylococcus aureus cultures. AgC coating has proved to efficiently prevent bacteria/biofilm growth on the cation resin beads and thereby significantly increase the service life of the cation exchange resin, especially in hot climatic conditions. Possible antibiofouling mechanisms of the modified nanocomposite cationite have been discussed. Since 2020, the modified silver-containing cationite has been successfully utilized for water softening systems of boiler equipment in Uzbekistan, demonstrating the suitability of the suggested facile coating technique for reducing fouling of cation-exchange resin.

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Section: Introduction *mentioning

confidence: 83%