This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Electrodeionization" – news · newspapers · books · scholar · JSTOR(August 2022) (Learn how and when to remove this message)
Electrodeionization (EDI) is a water treatment technology that utilizes DC power, ion exchange membranes, and ion exchange resin to deionize water. EDI is typically employed as a polishing treatment following reverse osmosis (RO), and is used in the production of ultrapure water. It differs from other RO polishing methods, like chemically regenerated mixed beds, by operating continuously without chemical regeneration.[1]
Electrodeionization can be used to produce high purity water, reaching electrical resistivity values as high as 18.2 MΩ/cm.
Electrodeionization (EDI) integrates three distinct processes:
Electrolysis: A continuous DC current directs positive and negative ions toward electrodes with opposing electrical charges. The electrical potential draws anions and cations from diluting chambers, through cation or anion exchange membranes, into concentrating chambers.
Ion exchange: An ion exchange resin fills the diluting chambers. As water flows through the resin bed, cations and anions become affixed to resin sites.
Electrochemical regeneration: Unlike chemically regenerated mixed beds, EDI accomplishes regeneration through water splitting induced by the continuous electric current. Water splits from H2O into H+ and OH- to effectively regenerate the resin without the need for external chemical additives.
EDI is sometimes labeled "continuous electrodeionization" (CEDI) because the electric current continually regenerates the ion exchange resin mass.
^Arar, Özgür; Yüksel, Ümran; Kabay, Nalan; Yüksel, Mithat (2014-06-02). "Various applications of electrodeionization (EDI) method for water treatment—A short review". Desalination. Special Issue: Electromembrane Processes for Desalination. 342: 16–22. doi:10.1016/j.desal.2014.01.028. ISSN 0011-9164.
and 17 Related for: Electrodeionization information
regeneration. Electrodeionization can be used to produce high purity water, reaching electrical resistivity values as high as 18.2 MΩ/cm. Electrodeionization (EDI)...
filtering, microfiltration, ultrafiltration, ultraviolet oxidation, or electrodeionization. Combinations of a number of these processes have come into use to...
Enlightenment (software), an integrated development environment Electrodeionization, a water purification process Eating Disorder Inventory, a self-report...
neutral water. Water portal Alkaline diet Pseudoscience Quackery Electrodeionization Magnetic water treatment Negative air ionization therapy Self-ionization...
correct potency. Disinfectant Electrolysis of water Water ionizer Electrodeionization Electrochemical engineering Degree of ionization Mixed oxidant Dickerson...
treatment, microfiltration, membrane technology (reverse osmosis, electrodeionization) or ion-exchange resins. The generation of the corrosion products...
electrodialysis is the production of pure water and ultrapure water by electrodeionization (EDI). In EDI, the purifying compartments and sometimes the concentrating...
calcium carbonate out of solution utilising the common-ion effect. Electrodeionization: Water is passed between a positive electrode and a negative electrode...
electrolytes is done in some water systems by passing the water through an electrodeionization (EDI) device, which removes any leftover anions or cations and replace...
endotoxins, microbials, and viruses. Today, ion exchange (IX) and electrodeionization (EDI) are the primary deionization technologies associated with UPW...
technologies including the use of ozone generators, wastewater evaporation, electrodeionization and bioremediation are also able to address the challenges of industrial...
microfiltration, ultrafiltration, degassing, ultraviolet photooxidation and electrodeionization. Products are designed to minimize impact on the environment at all...