A review on recent advances in electrodeionization for various environmental applications

Rathi, B. Senthil; Kumar, P. Senthil; Parthiban, R.

doi:10.1016/j.chemosphere.2021.133223

Cited by 34 publications

(8 citation statements)

References 173 publications

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“…Emerging electrochemical methods include electrodeionization (EDI, sometimes called hybrid ion exchange ED), ,− shock electrodialysis (shock ED), , capacitive deionization (CDI), , battery deionization (BDI), , and Faradaic electrosorption. , These technologies are unique from all of the others discussed so far in that removal of contaminants is based on their response to electric fields in solution or electrochemical reactions at electrodes. Electrochemical systems use applied electrical currents to remove contaminants from the feed by either driving separations in bulk electrolytes, , electrochemically trapping them in electric double layers (EDLs), ,, or intercalating them in solid electrodes (e.g., materials composed of two-dimensional, layered structures). − The first of these mechanisms is governed by electrokinetics, and the second and third are forms of electrosorption, as explained in Figure .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

et al. 2022

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Agricultural development, extensive industrialization, and rapid growth of the global population have inadvertently been accompanied by environmental pollution. Water pollution is exacerbated by the decreasing ability of traditional treatment methods to comply with tightening environmental standards. This review provides a comprehensive description of the principles and applications of electrochemical methods for water purification, ion separations, and energy conversion. Electrochemical methods have attractive features such as compact size, chemical selectivity, broad applicability, and reduced generation of secondary waste. Perhaps the greatest advantage of electrochemical methods, however, is that they remove contaminants directly from the water, while other technologies extract the water from the contaminants, which enables efficient removal of trace pollutants. The review begins with an overview of conventional electrochemical methods, which drive chemical or physical transformations via Faradaic reactions at electrodes, and proceeds to a detailed examination of the two primary mechanisms by which contaminants are separated in nondestructive electrochemical processes, namely electrokinetics and electrosorption. In these sections, special attention is given to emerging methods, such as shock electrodialysis and Faradaic electrosorption. Given the importance of generating clean, renewable energy, which may sometimes be combined with water purification, the review also discusses inverse methods of electrochemical energy conversion based on reverse electrosorption, electrowetting, and electrokinetic phenomena. The review concludes with a discussion of technology comparisons, remaining challenges, and potential innovations for the field such as process intensification and technoeconomic optimization.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

et al. 2022

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“…Regarding divalent ions, a high rate of their migration can be achieved only in flexible resins. Different fields of the EDI application are considered in reviews [67][68][69].…”

Section: Ion Exchange and Electrodialysismentioning

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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“…7 The principles, mechanism, and applications of EDI have been thoroughly discussed in a number of review papers. [8][9][10][11][12][13] In the dilute compartment of the EDI system, the water dissociation reaction occurs when oppositely charged resins (i.e., anion exchange resins/cation exchange resins) or the resin/membrane interface generate H + and OH − ions, which continuously regenerate the ion exchange resin. As a result, a portion of the resins in the EDI system are permanently regenerated.…”

Section: Introductionmentioning

confidence: 99%

“…7 The principles, mechanism, and applications of EDI have been thoroughly discussed in a number of review papers. 8–13…”

Section: Introductionmentioning

confidence: 99%

Polymer-enhanced ultrafiltration–electrodeionization hybrid system for the removal of boron

Soysüren

İpek

Arda

et al. 2023

Environ. Sci.: Water Res. Technol.

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A review on recent advances in electrodeionization for various environmental applications

Cited by 34 publications

References 173 publications

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

Electrochemical Methods for Water Purification, Ion Separations, and Energy Conversion

Applications of Ion Exchange Resins in Water Softening

Polymer-enhanced ultrafiltration–electrodeionization hybrid system for the removal of boron

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