280 results about "Iodide ion" patented technology

The invention provides a system and a method for treating coexisting new pollutants in drinking water, and the system and the method are characterized in that firstly, ozone microbubble water with small volume and large specific surface area and magnetized superfine activated carbon are used for carrying out oxidation treatment on the coexisting new pollutants and adsorbing pollutants with small molecular weight and relatively high activity; the purpose of removing part of new pollutants is achieved; then, under the irradiation of an ultraviolet lamp tube, the reducing agent catalyzes sulfite to generate reducing free radicals such as hydration electrons [eaq-],. H and SO3., and under the substitution action of iodide ions, reductive dehalogenation and iodine substitution reaction of the halogenated organic matter difficult to degrade are achieved, and reduction removal of new pollutants difficult to degrade is achieved. The system is simple and compact in structure, is a treatment device integrating filtration, oxidation, adsorption and reduction, reduces the occupied area, can realize effective removal of coexisting new pollutants with different molecular characteristics and different reaction activities through multiple actions of physical interception, oxidation, adsorption, reduction and the like, and has a wide application prospect.

The invention discloses nanoscale bismuth hydroxide as well as a preparation method and application thereof. The invention provides a preparation method of bismuth hydroxide. The preparation method comprises the following steps: reacting a mixture solution of a surfactant solution and a bismuth source solution at the temperature of 100-300 DEG C and the pressure of 0.5-5 MPa to obtain bismuth hydroxide, the pH value of the mixture liquid is 5-12; the bismuth source is bismuth nitrate; the surfactant is selected from polyvinylpyrrolidone or hexadecyl trimethyl ammonium bromide. According to the preparation method, bismuth hydroxide with the microscopic primary particle size of about 40-90 nm, uniform distribution, the secondary particle size D99 of 2-4 microns, the purity of 99.9% and the particle size of more than 99.9% can be obtained, and the adsorption rate of bismuth hydroxide to bromide ions and iodide ions reaches 80% or more.

The invention discloses polylactic acid polyol as well as a preparation method and application thereof. The preparation method comprises the following steps: performing a heating reaction on zinc salt, organic ammonium salt and bis (ethylene carbonate) ether to prepare an in-situ catalyst; anions of the organic ammonium salt are selected from any one of bromide ions, chloride ions and iodide ions; and adding a lactide monomer, and carrying out polymerization reaction to obtain the polylactic acid polyol. The polylactic acid polyol prepared by the invention has a flexible chain segment, can provide better flexibility, and can be applied to preparation of a polyurethane material.

The invention provides a low-molar-concentration I < + > stabilizer / zinc salt aqueous zinc-iodine battery electrolyte and an aqueous zinc-iodine battery, and belongs to the technical field of aqueous zinc-iodine battery electrolytes.The electrolyte comprises the following chemical components: an I < + > stabilizer, other zinc salts, a multi-iodide ion complexing agent, a diluent and water; in the electrolyte, the concentration of the I + stabilizer is 0.5-1.5 mol / L, the concentration of the other zinc salt is 0.5-2.5 mol / L, the mass fraction of the multi-iodide ion complexing agent is 3-15%, and the volume ratio of the diluent to the water is 1: (3-19); the multi-iodide ion complexing agent comprises at least one of polyvinyl alcohol, polyethylene glycol and polyvinylpyrrolidone. The electrolyte can still realize high coulombic efficiency of the aqueous zinc-iodine battery in the presence of a low-molar-concentration I < + > stabilizer / zinc salt, and also can inhibit side reaction at one end of a zinc negative electrode in the cyclic process of the aqueous zinc-iodine battery, shuttle effect of multi-iodide ions in the I- / I2 conversion process at one end of an iodine positive electrode and hydrolysis of I < + > in the I2 / I < + > process, so that the cycle life of the battery is prolonged, and the service life of the battery is prolonged. And the working temperature range is widened, so that the device can stably operate under severe conditions.

The invention relates to the technical field of flow batteries, in particular to a bromine-chromium flow battery electrolyte and a flow battery. The electrolyte is composed of a basic electrolyte and an additive; the additive is an iodine elementary substance or an iodine-containing compound; the basic electrolyte comprises bromide ions, chromium ions and hydrogen ions; the molar concentration ratio of iodine to bromide ions in the electrolyte is (1: 8)-(1: 4), one or two of iodine elementary substances or iodide ions are used as additives, the bromide ions and the iodine elementary substances are complexed in the charging process to form I2nBr <-> to exist in the electrolyte, then the I2nBr <-> generates the bromine elementary substances through an electrochemical reaction, and the electrochemical reaction electrode potential (Egt) of I2nBr <->-Br2; the electrode potential (E = 1.0873 V vs.SHE) is higher than the electrode potential (E = 1.0873 V vs.SHE) of Br <->-> Br2, so that the energy density of the bromine-chromium flow battery is improved.

The invention discloses an actinide-graphdiyne aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The actinide-graphdiyne aerogel composite material comprises actinide ions, iodide ions and graphdiyne aerogel, the graphdiyne aerogel is of a porous net structure, and the actinide ions and the iodide ions exist on the surface of the graphdiyne aerogel in the form of nanoclusters; and the actinide ions are selected from one of Th, Pa, U, Np, Pu and Am ions. The actinide-graphdiyne aerogel composite material can be used as a catalyst to realize efficient thermocatalytic ammonia production under mild conditions, the thermocatalytic ammonia production performance of the composite material can be regulated and controlled by changing a monomer structure for preparing graphdiyne aerogel, and even thermocatalytic ammonia production of the graphdiyne aerogel material is realized under the condition of no metal load; the catalyst is expected to become a new-generation high-performance thermocatalytic ammonia production catalyst.

IR-sensitive lithographic printing plate precursors provide a stable print-out image using a unique IR-sensitive image-recording layer. The IR radiation-sensitive layer includes: (1) a free radical initiator composition with an electron-donating agent and one or more iodonium cations; (2) a free radically polymerizable composition; and (3) a color-changing compound of Structure (I) having an indene ring in the conjugated chain between the aromatic terminal groups. The IR radiation-sensitive composition and layer also contains one or more borate ions such that the molar ratio of one or more borate ions to the one or more iodonium ions is at least 0.5:1. After IR imaging, these precursors exhibit desirable printout images both fresh and after dark storage. The precursors can be developed on-press.

The invention discloses a negative pressure electric field dressing, comprising a dressing body, a flexible sealing film for sealing and fixing the dressing body on the wound surface, an iodine ion gel layer is arranged below the dressing body, a negative pressure component connected with the dressing body and generating negative pressure is arranged on the flexible sealing film, and an electric field component connected with the iodine ion gel layer and generating an electric field is also arranged on the flexible sealing film. The dressing has the advantages of convenient replacement and promoting wound healing.

The invention discloses a method for preparing a solar cell by inhibiting perovskite iodine migration and modifying a thin film through a piperazine derivative, and belongs to the technical field of perovskite solar cells. According to the method, a piperazine derivative is used between a perovskite layer and an electron transport layer, so that the piperazine derivative has the functions of modifying a perovskite thin film and inhibiting iodine migration. A modified perovskite light absorption layer is obtained by spin-coating a piperazine derivative solution on the surface of perovskite. The piperazine derivative can act with the iodine simple substance generated after the perovskite material is degraded, and decomposes the iodine simple substance to generate iodide ions, so that further degradation of the perovskite film is prevented, contact between the iodine simple substance and a silver electrode is reduced, and the stability of perovskite is improved. Meanwhile, the material can effectively passivate lead site defects on the surface of the perovskite thin film, and non-radiative recombination generated at the defects is reduced. According to the method, perovskite degradation and silver electrode damage caused by iodine elementary substance volatilization can be effectively inhibited, and an efficient and stable perovskite solar cell device is finally obtained.

The invention relates to a multifunctional mixed electrolyte for high-magnification long-cycle multi-electron reaction. The electrolyte is an aqueous electrolyte containing zinc salt, iodized salt and bromine salt; wherein the molar concentration of the zinc salt is 1-3 M, the molar concentration of the iodized salt is 0.1-1 M, the molar concentration of the bromine salt is 0.1-1 M, and the molar ratio of bromine ions to iodide ions is 0.1-10. The zinc-double-halogen battery has high ionic conductivity, efficient active substance utilization rate, excellent cycle performance and higher rate capability, and the electrochemical performance of the zinc-double-halogen battery can be remarkably improved.

The invention belongs to the technical field of water electrolysis hydrogen production, and discloses a branched polyaromatic piperidine anion exchange membrane, a preparation method and application. The preparation method comprises the following steps: preparing a branched polymer precursor, preparing a quaternized branched polymer, and preparing the branched anion exchange membrane: dissolving the quaternized branched polymer in a third solvent, and drying in a vacuum drying oven to obtain the branched anion exchange membrane in the form of iodide ions, and soaking the branched anion-exchange membrane in the form of iodide ions in a NaOH solution for ion exchange, so that the branched anion-exchange membrane in the form of iodide ions is completely converted into a form of hydroxyl ions. According to the invention, ether-free skeleton polyaromatic hydrocarbon is selected as a main chain and has the characteristic of strong alkali-resistant stability, six-membered nitrogen heterocyclic ions are adopted as functional groups, and a large steric hindrance structure can hinder nucleophilic substitution and elimination reaction, so that the alkali-resistant stability of the anion exchange membrane is improved, and the service life of the anion exchange membrane is prolonged.

The invention discloses a zinc-iodine battery positive electrode material and a preparation method and application thereof, the zinc-iodine battery positive electrode material comprises carbon cloth, a covalent organic framework and an active substance, the covalent organic framework is 8F-COF, the covalent organic framework 8F-COF grows on the carbon cloth in situ, and the active substance is adsorbed on the carbon cloth. The material is flexible and self-supporting, energy storage is further improved, the service life of the zinc-iodine battery is further prolonged, an 8F-COF material is grown on carbon cloth in situ, 8F-COF has a microporous structure containing F atoms, when polyiodide ions pass through the porous structure, the 8F-COF connects polyiodide to a polymer skeleton through an aromatic nucleophilic substitution reaction, and thus the energy storage capacity of the zinc-iodine battery is improved. The iodide is effectively inhibited through space and electrostatic hindering, and the shuttle effect is reduced. And after being loaded with iodine, the material can be directly used as an electrode material without adding any conductive agent and binder.

To transform anodic reaction from oxygen evolution reaction to iodate ion formation reaction in a method for manufacturing hydrogen by electrolyzing alkali water, and to highly efficiently implement an alkaline water electrolysis method with low power consumption.SOLUTION: There are provided a membrane-free alkaline water electrolysis method which electrolyzes an alkali metal hydroxide aqueous solution which contains iodide ions and whose concentration is higher than or equal to 1 mol / L, generates a hydrogen gas in a cathode, and generates iodate ions in an anode, and a membrane-free alkaline water electrolysis device.SELECTED DRAWING: Figure 9

The present invention discloses a method for adsorbing radioactive iodide ions in radioactive wastewater, which includes the following process: adding silver copper oxide to the radioactive wastewater, and the iodide ions in the radioactive wastewater react with the silver copper oxide, so that the concentration of iodide ions in the radioactive wastewater is reduced. The adsorption of radioactive iodide ions in radioactive wastewater by the silver copper oxide of the present invention belongs to chemical adsorption, which has the characteristics of fast adsorption speed, high adsorption efficiency and adsorption capacity, the adsorbed product is not easy to desorb, is easy to solidify and dispose, is convenient for recycling, is convenient to use and is not easily affected by interfering ions and pH. The silver copper oxide has a strong selective adsorption effect on iodide ions in the wastewater environment of long half-life radioactive element iodine, and can effectively improve the radioactive pollution of iodine in the water environment, and solve the main problems of spent fuel reprocessing and radioactive water pollution.

The invention relates to the technical field of electrochemistry, in particular to a supramolecular ionic liquid gel electrolyte of a solid-state zinc-iodine battery for a high-voltage platform, which is characterized in that free water in hydrogel is replaced by supramolecular interaction between ionic liquid and polyvinyl alcohol molecules to construct a water-poor ionic liquid polymer network; zinc bromide is introduced to serve as an ion carrier in a polymer network through the HofMichael effect, and preparation of the high-voltage solid-state zinc-iodine battery is finally achieved through the chemical coupling effect of bromide ions and iodide ions; the solid electrolyte is prepared from an ionic liquid and a hydrogel solution, imidazole cations of the ionic liquid have a strong electron withdrawing effect, and anions of the ionic liquid are combined with zinc ions and bromide ions to form polyanions. And the ionic liquid is used for replacing water in the hydrogel, so that the ionic liquid gel electrolyte with good chemical stability, mechanical property and electrochemical property is prepared.

The invention provides application of a Fe-doped BiOI material in ion exchange extraction of iodide ions, and relates to the technical field of iodide ion extraction. According to the preparation method, Fe is successfully doped into a BiOI structure through a two-step grinding method, and the Fe-doped BiOI material is obtained. According to the preparation method disclosed by the invention, more effective separation of photo-induced electrons and holes can be realized, and the photoelectrochemical performance of the Fe-doped BiOI material is improved. The prepared Fe-doped BiOI material is used as a working electrode and is used for extracting iodide ions in a light-assisted electric control ion exchange technology. The Fe-doped BiOI material prepared by the invention is applied to light-assisted electric control ion exchange iodine extraction, and has the characteristics of environmental friendliness and no secondary pollution.

To provide a producing method of an iodine concentrated liquid excellent in suppressing lowering of a transmission efficiency of iodide ions in an electrodialyzer.SOLUTION: A method for producing an iodine concentrated liquid of the present invention includes a reduction process in which a reducing agent is added to a waste liquid containing iodine components to reduce at least a portion of the iodine (I2) contained in the iodine components to obtain iodide ions (I-), and after the reduction process, an electrodialysis process using an electrodialyzer equipped with an anion exchange membrane to separate the waste liquid into an iodine-containing concentrated liquid and a deionized liquid.SELECTED DRAWING: Figure 2

The invention provides a passivation method of a perovskite solar cell and the perovskite solar cell. The passivation method of the perovskite solar cell comprises the following steps: passivating the perovskite solar cell by using a multi-component passivation system; wherein the multi-component passivation system comprises a passivator containing double amino groups and iodide ions; a passivator containing a benzene ring and an amino group; the invention relates to a passivator containing piperazine rings and iodide ions. Through the synergistic effect of the ternary passivating agent, crystal defects are better passivated, energy level matching is improved, and cell interface filling is better, so that the series resistance of the solar device is lower, and the open-circuit voltage is higher.

A positive electrode material, including a substrate and a first region located on a surface of the substrate, where a molar ratio of iodine element to nickel element in the first region is 0.25 to 1.5. In this application, iodine ion lattice doping is introduced into the surface layer of the positive electrode material, so that the structural stability of the positive electrode material under high temperatures and high voltages and the kinetic performance under large-rate charge / discharge conditions are effectively improved, thereby reducing gas production in high-temperature and high-voltage storage and temperature rise under large-rate charge / discharge conditions of the electrochemical device, and improving the comprehensive performance of the electrochemical device.

The invention relates to a multi-metal hydroxide and iodine composite material as well as a preparation method and application thereof. According to the invention, efficient chemical adsorption of negatively charged iodine species (such as I <-> and I3) in the electrolyte is realized by utilizing the unique layered structure and the characteristic that the surface of the multi-metal hydroxide material is positively charged, so that the iodine-loaded positive electrode material is successfully prepared. The physical confinement and strong electrostatic interaction of the material can effectively anchor an iodine active substance, inhibit the dissolution and shuttle effect of polyiodide ions, and significantly reduce the loss of the active substance in the cycle process. Meanwhile, bromide ions or chloride ions are introduced into the electrolyte to anchor I < + >, so that a four-electron transfer reaction mechanism of iodine is realized, and the specific capacity of the battery is greatly improved. Experimental results show that the capacity retention rate of the zinc-iodine battery adopting the positive electrode material reaches 88% or above after circulation for 30000 times under the current density of 10 Ag <-1 >, and the zinc-iodine battery shows excellent high-capacity performance and long circulation stability. The invention provides a new technical scheme for developing a high-performance aqueous zinc-iodine battery, and has a wide application prospect in the field of energy storage.

The invention discloses a high-flux nanofiltration membrane suitable for iodide ion separation as well as a preparation method and application of the high-flux nanofiltration membrane. The nanofiltration membrane is prepared by taking an ultrafiltration membrane or an ultrafiltration membrane modified by a porous MOF material as a base membrane, taking an ethylene derivative as a membrane preparation monomer and adopting an ultraviolet radiation grafting method. The maximum removal rate of the nanofiltration membrane to 100 mg / LI <-> reaches 95% or above, even if chloride ions or sulfate ions exist in a solution, the removal rate of the membrane to iodide ions is good, the flux is far larger than that of a reverse osmosis membrane, the maximum removal rate can reach about 45 L / m < 2 >. H under 0.6 MPa, the flux is large, water is used as a solvent in the whole preparation process, and the nanofiltration membrane is environmentally friendly and free of pollution. The method is suitable for removing iodide ions in wastewater containing radioactive iodide ions and water areas with high iodide ion content, and has a good application prospect.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of an olefin monomer of benzocrown ether imidazole polymerized ionic liquid. Comprising the following steps: adding benzo-12-crown-4-ether, iodo-alkyl acid and polyphosphoric acid into a heat preservation kettle, carrying out heating reaction, adding chloro-alkyl acid, carrying out heating reaction, dropwise adding water to hydrolyze residual polyphosphoric acid, extracting an organic phase by chloroform, washing chloro-alkyl acid by using a sodium carbonate aqueous solution, drying, carrying out suction filtration, and transferring into a reaction kettle; adding 1-methylimidazole, carrying out heating reaction, carrying out rotary evaporation to obtain chloroform, adding dioxane, triethylamine and hydroquinone, carrying out heating reaction, and carrying out rotary evaporation to obtain dioxane; the ionic liquid, organic salt and pure water are added into a dissolving kettle, dichloromethane is used for extracting an organic phase, pure water is used for washing chloride ions and iodide ions in the organic phase, dichloromethane is obtained through rotary evaporation, and a product is dried in vacuum. According to the method, the steps of acylation, quaternization and dehydrohalogenation are used, so that the steps are simplified, and the purification treatment process of acylation after quaternization is avoided.

The invention discloses a single-molecule electric sensor and a detection method for detecting the content of iodide ions in human urine, the detection method is based on a scanning tunnel microscopy break junction method, and the detection process comprises the following steps: in a solution containing iodide ions of a to-be-detected object, adding a detection reagent, the method comprises the following steps: controlling an Au needle tip to approach a probe molecule modified Au substrate through piezoelectric ceramics until a preset needle tip current value is 50nA, and then controlling the needle tip to continuously extend forwards towards the substrate by a certain distance under an additionally applied pulse voltage, so as to ensure that the needle tip is in contact with the substrate; controlling the needle tip to be far away from the substrate at a constant speed, forming a metal-probe molecule-metal junction in the process, and recording a conductance-distance curve of the needle tip at the same time; the process is repeated, thousands of conductance-distance curves are counted to obtain a one-dimensional conductance diagram, Gaussian fitting is carried out on conductance peaks in the one-dimensional conductance diagram to obtain the area of a single-molecule conductance peak, and quantitative detection can be carried out on the content of iodide ions in the solution to be detected based on the area of the single-molecule conductance peak.

This invention discloses a zinc-iodine battery and an electrode carrier that can simultaneously suppress polyiodine ion shuttle and regulate zinc deposition behavior, wherein the electrode carrier is Cu. + Coordinated poly(3,4-ethylenedioxythiophene) (Cu-PEDOT), via a solvothermal method, to convert Cu... + It was prepared by coordinating with S atoms in the PEDOT framework. I₂ was loaded onto this support as the positive electrode, and Zn was electrochemically deposited as the negative electrode to assemble a battery. The atomically monodisperse Cu in this invention... + It not only enhances the chemisorption of polyiodides as a Lewis active site, but also significantly reduces I... ‑ / I 0 Conversion energy barrier, accelerates reaction kinetics and suppresses shuttle effect; at the same time, Cu + The zinc-affinity property of the substrate reduces the Zn nucleation overpotential, guides Zn to deposit uniformly along the (002) crystal plane, and suppresses dendrites. Zinc-iodine batteries based on this substrate exhibit excellent rate performance and ultra-long cycle stability, and achieve dendrite-free negative electrode growth even under high depth-of-discharge conditions. This invention solves the problem of simultaneous multi-iodide shuttle in the positive electrode and zinc dendrite growth in the negative electrode using a single substrate, significantly improving the energy density and cycle life of the battery.

The application relates to a liquid flow energy storage device and relates to the technical field of new energy sources. The liquid flow energy storage device comprises an energy storage system and a discharge system, the energy storage system and the discharge system both comprise an electric membrane stack, the electric membrane stack comprises a positive electrode chamber, a proton chamber and a negative electrode chamber which are sequentially arranged and are in fluid communication, liquid in the proton chamber only transmits protons and does not participate in electrochemical reactions in the energy storage system and electrochemical reactions in the discharge system, so that even if a small amount of iodine ions enter the proton chamber, the iodine ions will leave the electric membrane stack along with the circulation of the liquid, and thus the iodine ions in the proton chamber cannot migrate to the positive electrode chamber, the membrane damage caused by the migration of the iodine ions is avoided, and therefore the service life and the efficiency of the electric membrane stack can be greatly improved.

The application relates to the technical field of catalysts, and discloses a limited type iodine-based homogeneous immobilized catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and iodine ions, magnesium ions and quaternary ammonium ions loaded on the carrier, wherein the molar ratio of the magnesium ions, the quaternary ammonium ions, the iodine ions and the carrier is 0.01-1:4-15:1-30:1. The limited type iodine-based homogeneous immobilized catalyst disclosed by the application enhances the electrostatic interaction between iodine ions and quaternary ammonium ions through the molecular sieve limiting effect to construct a limited type structure. The catalyst has significantly enhanced CO2 adsorption and activation capacity, can activate an epoxide compound, and accelerates the ring opening of the epoxide compound. In a cycloaddition reaction catalyzed by the catalyst under the conditions of no solvent and no auxiliary agent, the conversion rate of propylene oxide can reach more than 73%, and the propylene carbonate selectivity can reach more than 85%.

The invention provides a method for resource utilization of iodine-containing organic waste and recovery of iodine, and belongs to the technical field of waste resource utilization. The method comprises the following steps: gasifying the iodine-containing organic waste at a high temperature of 1100-1750 DEG C in a pure oxygen atmosphere, and carrying out partial oxidation reaction, namely incomplete combustion, on the iodine-containing organic waste by controlling the oxygen amount to generate crude synthesis gas with H2, CO, CO2, H2O and HI as main components; the obtained crude synthesis gas is washed with water, HI is converted into a solution containing-1 valence iodide ions, then the iodide ions are further converted into iodized salt, recovery of iodine in the iodine-containing organic waste is achieved, and the difficulty and cost of the iodine recovery process are reduced; and in the high-temperature gasification process of 1100-1750 DEG C, hydrocarbon elements in the iodine-containing organic waste are converted into synthesis gas mainly comprising H2 and CO, so that resource utilization of the hydrocarbon elements can be realized, and secondary pollution cannot be caused.

The invention provides a composition containing metal type theta-iron carbide and epsilon / epsilon '-iron carbide as well as a preparation method and application of the composition. The method comprises the following steps: preparing a metal type theta-iron carbide compound; preparing a metal type epsilon / epsilon '-iron carbide compound; and mixing the metal type theta-iron carbide compound and the metal type epsilon / epsilon '-iron carbide compound to obtain the metal type iron carbide composition containing theta-iron carbide and epsilon / epsilon'-iron carbide, or mixing the metal type theta-iron carbide and the metal type epsilon / epsilon '-iron carbide to obtain a metal type iron carbide mixture; and carrying out dipping treatment on the metal type iron carbide mixture to enable the metal type iron carbide mixture to contain bromide ions and / or iodide ions. According to the composition disclosed by the invention, halide ions such as bromine or iodine are introduced into the components of the composition to serve as a catalyst for a synthesis gas conversion reaction, so that the reaction has a relatively high CO conversion rate and the like, and comprehensive optimization of a reaction result is realized.

The invention relates to a hydroiodic acid preparation device and method, and relates to the technical field of new energy. The hydriodic acid preparation device comprises a first phosphoric acid circulating device, a second phosphoric acid circulating device, a hydriodic acid circulating device, a deiodide ion device and a membrane module, and the membrane module comprises a first phosphoric acid chamber, a second phosphoric acid chamber and a hydriodic acid chamber which are sequentially arranged and are in fluid communication. The second phosphoric acid chamber is communicated with the iodide ion removal device, so that even if a small amount of iodide ions enter the second phosphoric acid chamber, the iodide ions can enter the iodide ion removal device along with the circulation of the liquid to be subjected to deiodination treatment, the liquid subjected to deiodination treatment returns to the membrane module again to be recycled, and at the moment, the iodide ions contained in the circulating liquid do not exceed the standard; the iodide ions in the second phosphoric acid chamber cannot migrate to the first phosphoric acid chamber, so that the anode membrane cannot be damaged due to migration of the iodide ions, the service life of the membrane module can be greatly prolonged, and the production efficiency of the membrane module can be greatly improved.

This operation method of an electrodialysis device includes an electrodialysis step for electrodialyzing an aqueous solution that contains halide ions and a polar organic solvent using an electrodialysis device which is provided with an anion exchange membrane manufactured by a crosslinking polymerization method. The aqueous solution contains 200 mg / L or more of iodide ions. In the electrodialysis step, if an electrodialysis test using a desalination liquid that contains iodide ions and sulfate ions is performed, the anion exchange membrane includes an anion exchange membrane with which TI / TSO4 is 3.5 or more, where TI is the transmission rate (%) of iodide ions (I-) and TSO4 is the transmission rate (%) of sulfate ions (SO4 2-) in the concentrated liquid, at the time when the residual ratio of iodide ions in the desalination liquid is 5%.