259 results about "Capacitive deionization" patented technology

The utility model relates to the technical field of water purification, in particular to a capacitive deionization filter element and water purification equipment. The capacitive deionization filter element comprises an electrode assembly, the electrode assembly comprises an insulating sheet and at least two layers of electrode plates, the insulating sheet and the electrode plates are arranged in a laminated mode, and the insulating sheet is clamped between the two adjacent layers of electrode plates; the electrode plate comprises a current collector layer and adsorption layers, and the adsorption layers are arranged on the front and back surfaces of the current collector layer; two adjacent layers of electrode plates are respectively configured as a positive plate and a negative plate, and a water passing channel for accommodating the insulating sheet is formed between the positive plate and the negative plate. The capacitive deionization filter element disclosed by the utility model is relatively simple in structure, simplifies the lamination arrangement process of the electrode assemblies, is convenient to process and produce, reduces the processing cost, and can ensure the purification treatment effect on raw water to a certain extent.

The invention relates to the technical field of salt lake lithium extraction, in particular to a dual-channel capacitive deionization device and method for salt lake lithium extraction. The invention provides a dual-channel capacitive deionization device for extracting lithium from a salt lake. The dual-channel capacitive deionization device comprises a first slurry channel plate, a first anionic membrane, a feeding liquid channel plate, a selective membrane, a recovery liquid channel plate, a second anionic membrane and a second slurry channel plate which are arranged in sequence, the first slurry channel plate and the second slurry channel plate adopt conductive structures; a first slurry channel is formed in one side, close to the first anionic membrane, of the first slurry channel plate; a second slurry channel is formed in one side, close to the second anionic membrane, of the second slurry channel plate; a feeding cavity communicated with the first anionic membrane and the selective membrane is formed in the feeding liquid channel plate, and a feed liquid inlet and a feed liquid outlet are formed in the feeding liquid channel plate; a recovery cavity communicated with the second anionic membrane and the selective membrane is formed in the recovery liquid channel plate; a recovery liquid inlet and a recovery liquid outlet are formed in the recovery liquid channel plate. The dual-channel capacitive deionization device for salt lake lithium extraction can separate and recover Li < + > ions at the same time, can work under the voltage of 0.8 V, can achieve the lowest energy consumption of 0.06 kWh mol <-1 >, has the charge efficiency as high as 96.71%, achieves low-energy-consumption and high-efficiency salt lake lithium extraction, and overcomes the defect that in the prior art, an FCDI device cannot be directly used for salt lake lithium extraction.

The utility model discloses a device for enhancing ion membrane-passing mass transfer based on full-channel flow electrode capacitive deionization, which comprises solution chambers, a cathode flow electrode chamber and an anode flow electrode chamber, the solution chambers comprise a first solution chamber and a second solution chamber, and an anion exchange membrane is arranged between the solution chambers. The two solution chambers are respectively provided with a guide plate, and each guide plate comprises a high-conductivity saline-water mixed solution channel. And the water flow directions of the two solution chambers are opposite. The first solution chamber and the second solution chamber contain high-conductivity saline mixed liquid which is formed by mixing pretreated seawater and a high-conductivity material. According to the FCDI device and the seawater desalination system, the middle solution chamber is additionally arranged, high-conductivity materials are added into the middle solution chamber, a flow guide channel of the middle solution chamber and mixed solution convection of different solution chambers are designed, and the phenomena of high resistance and membrane-liquid interface concentration polarization of the FCDI device system are solved; the desalting efficiency and the energy consumption performance are enhanced; the operation cost is reduced.

The utility model relates to the technical field of sewage treatment, and provides a multistage capacitive deionization device for electroplating wastewater, which comprises a box body, a quick dismounting mechanism is arranged in the box body, and the quick dismounting mechanism comprises five groups of sliding strips which are in sliding connection with preformed grooves in the inner wall of the box body; a cation filtering layer, an anion filtering layer, a nickel ion adsorption layer, a medium filtering layer and an activated carbon filtering layer are fixedly connected to the side surfaces, close to each other, of each group of sliding strips respectively. By means of the technical scheme, the problem that in the prior art, by arranging the sliding strips, use can be conducted by changing the installation positions of all the laminates is solved, and by arranging the fixing frames, the fixing rods, the L-shaped clamping strips and the clamping blocks, rapid self-locking can be conducted after the laminates are installed, so that nickel ions can be rapidly treated after being adsorbed, and the service life of the nickel ions is prolonged. And each laminate can be conveniently cleaned and replaced, and the problem that the subsequent use effect is affected by much dirt adhered to the surfaces of the laminates is avoided.

The invention belongs to the field of lithium recovery, and particularly relates to a method and a system for electrochemically recovering lithium ions in ternary lithium battery leachate. The method comprises the following steps: (1) leaching the cathode material of the waste ternary battery to obtain a ternary leachate; (2) performing lithium ion enrichment in a capacitive deionization device by taking the ternary leaching solution obtained in the step (1) as a lithium source to obtain a lithium-rich receiving solution and a lithium-removed recycling solution; (3) recovering the lithium-rich receiving liquid to obtain recovered lithium; and performing non-lithium metal element recovery on the lithium-removed recovery liquid. According to the technical scheme, the rocking chair type capacitive deionization RCDI system adopts a waste ternary battery cathode material (SNCM) as an electrode material, the extraction quantity of a single reaction cycle can reach 4.90 mM g <-1 >, continuous and selective lithium extraction is realized, and meanwhile, the cost and the environmental influence are reduced.

The invention discloses a method for treating heavy metal wastewater by using a bimetal MOFs (Metal-Organic Frameworks) derived carbon-porous carbon composite electrode material. The method comprises the following steps: preparing the bimetal MOFs derived carbon-porous carbon into a composite electrode material, and assembling the composite electrode material as a working electrode into a capacitive deionization device; and carrying out electro-adsorption treatment on the heavy metal wastewater by utilizing the capacitive deionization device to finish treatment on the heavy metal wastewater. According to the present invention, the bimetallic MOFs derived carbon-porous carbon assembled capacitive deionization device is utilized to treat the heavy metal wastewater, such that the characteristics of high adsorption capacity and selective adsorption are provided while the heavy metal ions are efficiently and rapidly removed so as to achieve the efficient removal of the heavy metals in the wastewater, and the selective recovery of the toxic and harmful metals can be performed; the method has the advantages of being low in cost, simple in process, convenient to operate, high in treatment efficiency, good in removal effect, environmentally friendly and the like, and has high application value and wide application prospects in the aspect of heavy metal polluted water treatment.

The invention discloses a plasma modified biochar electrode and a preparation method and application thereof. The plasma modified biochar electrode is obtained by performing plasma modification on a biochar electrode for 15-45 minutes under the vacuum degree of 300-1000 mT through a plasma cleaning machine. The biochar electrode is obtained by coating a current collector with electrode slurry containing biochar, a conductive agent and an adhesive and drying the electrode slurry; the biochar is prepared by the following steps: performing pyrolysis carbonization treatment on a biomass raw material under a limited oxygen condition to obtain original biochar, soaking the obtained original biochar in a KOH aqueous solution, drying, and performing heat treatment activation; the biomass raw material is sesame shells. The biochar electrode prepared by the invention has better hydrophilicity and electrochemical performance, and has better desalination amount and desalination stability when being used for electro-adsorption desalination in capacitive deionization.

The invention relates to a graphite phase carbon nitride doped bismuth oxide composite electrode material and a preparation method and application thereof, and belongs to the technical field of capacitive deionization desalination. The preparation method of the graphite phase carbon nitride doped bismuth oxide composite electrode material comprises the following steps: uniformly mixing g-C3N4 and Bi2O3, and calcining to obtain the graphite phase carbon nitride doped bismuth oxide composite electrode material. The graphite-phase carbon nitride doped bismuth oxide composite electrode material provided by the invention has abundant sites and attachment points, provides additional pseudocapacitance, and is beneficial to improving the electron transmission efficiency and the electro-adsorption capacity; the preparation method provided by the invention is simple, convenient and relatively low in cost; under a certain voltage and flow velocity, the g-C3N4atBi2O3 composite electrode material adsorbs chloride ions for a Faraday capacitor, and the activated carbon adsorbs sodium ions for a double-electrode-layer capacitor, so that the effect of removing sodium chloride is achieved.

The invention discloses a molten salt dielectric heat conduction chemical preparation method of a flat wood carbon electrode substrate material, a wood carbon electrode precursor is covered with molten salt, the molten salt dielectric heat conduction chemical synthesis is carried out according to the heating-heat preservation-cooling process, and the molten salt is a mixture formed by mixing inert molten salt and active molten salt; and removing condensed fused salt on the surface of the synthetic product, polishing the surface, and drying to obtain the wood carbon electrode substrate material. According to the preparation method, the problems of high cost, high energy consumption, narrow application range and the like in preparation of a high-performance plate electrode substrate carbon material aiming at integral wood with a specific size are solved, and the self-supporting electrode material substrate which is low in cost, has a hierarchical pore structure and has comprehensive performance is obtained. The obtained wood carbon electrode substrate material can be used as a plate electrode substrate carbon material; alternatively, a high surface capacitance plate electrode is directly used for capacitive deionization or supercapacitors.

The invention relates to the technical field of water treatment, and discloses a reclaimed water reuse treatment process suitable for island high-chlorine tail water, which comprises the following steps: when the real-time chloride ion concentration value is not higher than the chloride ion concentration threshold value, introducing the pretreated water into a low-salinity treatment path, and carrying out first desalination treatment by adopting a capacitive deionization technology; and when the real-time chloride ion concentration value is higher than the chloride ion concentration threshold value, guiding the pretreated water into a high-salinity treatment path, and carrying out second desalination treatment by adopting a reverse osmosis technology. A parallel double-path deep desalination framework is constructed, an intelligent control system guides water flow into an MCD I path or an LPRO path, and frequent switching of the system at a critical point is avoided by setting a hysteresis interval, so that a treatment path with the lowest instantaneous operation cost is automatically selected according to real-time water quality, energy consumption optimization in a full working condition range is realized, and the energy consumption is reduced. And long-term stable and efficient operation of the system is ensured.

The invention relates to the technical field of capacitive deionization, in particular to an electrode for capacitive deionization and a preparation method thereof. The electrode for capacitive deionization comprises an electrode material, a carbon material and an adhesive, the electrode material is DHPZ, and a preparation method of the DHPZ comprises the following steps: S1, primary reaction: grinding and mixing 2, 5-dihydroxy-1, 4-benzoquinone and 2, 3-diaminophenazine, heating in inert gas, cooling, filtering, cleaning and performing vacuum drying to obtain a primary product; and S2, acidizing the primary product, namely mixing the primary product with 2mol / L nitric acid according to a mass-volume ratio of 1: 1, magnetically stirring for 5 hours, filtering, cleaning with deionized water, centrifuging for multiple times, and drying in vacuum at 60 DEG C for 15 hours to obtain the DHPZ. According to the electrode for capacitive deionization and the preparation method of the electrode, the problems that in the capacitive deionization related technology, the desalting capacity is low, and the adsorption capacity and the removal efficiency are not high are solved.

The invention discloses a method for electrochemically treating kitchen waste anaerobic fermentation biogas slurry, which mainly comprises the following steps: 1, removing organic matters in the kitchen waste anaerobic fermentation biogas slurry through electrochemical oxidation, and reducing the ammonia nitrogen content and COD (Chemical Oxygen Demand) value of the biogas slurry; 2, reducing residual hypochlorite in the biogas slurry subjected to electro-oxidation in the step 1 into chloride ions through a thermal decomposition method, a photolysis method or a catalytic decomposition method; 3, constructing a capacitor by using a chloride ion adsorption material and a sodium ion embedded electrode material, and adsorbing sodium chloride in the biogas slurry in the step 2 through a capacitive deionization method; 4, discharging the capacitor adsorbing the sodium chloride in the sodium chloride liquid storage tank to analyze the sodium chloride, returning the discharged capacitor to the step 3 to adsorb the sodium chloride again, and circulating for multiple times until the content of the sodium chloride in the biogas slurry reaches the discharge standard; compared with the current mainstream treatment process of the kitchen waste anaerobic fermentation biogas slurry, the method provided by the invention can greatly reduce the energy consumption.

The invention relates to an aminophosphonate functionalized carbon material as well as a preparation method and application thereof. The amino phosphonate functionalized carbon material comprises a carbon material matrix and a structure which is covalently connected with the carbon material matrix and is shown as a formula I. The amino phosphonate functionalized carbon material can be applied to a capacitive deionization technology to selectively adsorb thorium from a mixed solution containing thorium and rare earth, and has high thorium adsorption capacity. # imgabs0 #

The invention relates to a composition for an electrode, a capacitive deionization electrode and application, the composition for the electrode comprises a porous carbon material, an oxidation modified conductive carbon material and a binder, and the mass ratio of the binder to the porous carbon material to the oxidation modified conductive carbon material is 1: (4-96): (0.2-15). The oxidation modified conductive carbon material with excellent conductivity is introduced into the porous carbon material, so that charges can be quickly transferred in the composition for the electrode, and the desalting rate of the capacitive deionization electrode prepared from the composition for the electrode is further improved. The oxidation-modified conductive carbon material and the porous carbon material are connected through interaction and / or physical winding between functional groups, so that the dispersity of the porous carbon material is improved, the agglomeration of the porous carbon material is avoided, the use amount of a binder is further reduced, and the conductivity of the capacitive deionization electrode is improved.

The utility model relates to the technical field of water purification, and provides a water purification assembly and water purification equipment. The water purification assembly comprises a capacitive deionization filter element, the capacitive deionization filter element comprises a central column and an electrode assembly, the electrode assembly is wound around the peripheral wall of the central column, the two ends, in the axial direction of the central column, of the electrode assembly are sealed, the outer side of the electrode assembly is used for receiving input of raw water, and the inner side of the electrode assembly is used for outputting purified water or waste water; the center column is provided with a water outlet channel, a water passing hole and a water outlet, the water passing hole and the water outlet are communicated with the water outlet channel, the water outlet channel is arranged in the center column, the water outlet is formed in the first end of the center column, and the water passing hole is formed in the peripheral wall close to the second end of the center column. According to the utility model, bubbles generated in the filter element can be effectively discharged in the desalting process of the capacitive deionization filter element, so that the capacitive deionization filter element can be prevented from generating noise in the working process, and the water purification treatment effect of the capacitive deionization filter element is ensured.

The invention relates to a wastewater treatment method, in particular to a capacitive deionization-oxidation coupling high-salt industrial wastewater treatment process, which comprises the following steps: firstly, carrying out micro-filtration to remove suspended matters and adjust the pH value, then carrying out low-voltage electro-adsorption desalination through a modified capacitive deionization unit, collecting electric energy released in a regeneration stage, converting the electric energy into electric energy of a catalytic oxidation unit through a converter, and carrying out high-salt industrial wastewater treatment. Desalted water enters a non-free radical catalytic oxidation unit, a UV-LED excitation catalyst activates persulfate, singlet oxygen is generated to degrade organic matter, an intelligent control system dynamically adjusts voltage, medicament and energy distribution according to the water inlet condition, finally, capacitive deionization regeneration liquid is subjected to multi-stage membrane concentration and crystallization, salt products are recycled, and waste water treatment and recycling are achieved.

The invention belongs to the technical field of phosphorus-containing wastewater treatment and recycling, and relates to a flowing electrode capacitive deionization system and method for selective enrichment of phosphorus in phosphorus-containing wastewater. According to the structure, a first collector plate, a first anion exchange membrane, a cation exchange membrane, a second anion exchange membrane and a second collector plate are sequentially arranged in parallel from left to right; the ion exchange membranes divide the system into an anode flow electrode chamber, a first solution chamber, a second solution chamber and a cathode flow electrode chamber; electrode liquid in the anode flowing electrode chamber, the cathode flowing electrode chamber and the electrode liquid storage chamber circularly flows; the technical problems of low phosphorus enrichment multiple, poor selectivity, large acid and alkali consumption, high treatment cost and easy scaling are solved, and the method has good application prospects in the aspects of phosphorus-containing wastewater treatment and phosphorus recovery.

The invention relates to the field of electrode materials of capacitive deionization desalination systems, in particular to low-temperature synthesis of AlFe [Fe (CN) 6] 2 and application of the AlFe [Fe (CN) 6] 2 to capacitive deionization desalination. FeCl3. 6H2O and Al (NO3) 3.9 H2O are added into deionized cold water containing C6H5Na3O7. 2H2O to be evenly stirred to obtain a solution A, and K3Fe (CN) 6 is added into deionized cold water to be evenly stirred to obtain a solution B; mixing the solution A with the solution B, aging, centrifuging and washing in a low-temperature environment, and drying to obtain AlFe [Fe (CN) 6] 2. The crystallization rate of the Prussian blue analogue is slowed down by reducing the aging temperature, so that the vacancy defect of [Fe (CN) 6] < 3-> is reduced, the structure is enhanced by introducing an inert element Al, and the prepared electrode material has high Na < + > storage capacity and excellent cycling stability and shows huge application potential in capacitive deionization desalination.

The invention discloses shaddock peel activated carbon for capacitive deionization as well as a preparation method and application of the shaddock peel activated carbon, and belongs to the technical field of capacitive deionization. The preparation method of the shaddock peel activated carbon for capacitive deionization comprises the following steps: mixing shaddock peel powder and an acid reagent, and performing hydrothermal carbonization to obtain an intermediate product; and mixing the intermediate product with an activating reagent, and activating to obtain the shaddock peel activated carbon for capacitive deionization. The waste shaddock peel is subjected to hydrothermal carbonization and high-temperature activation to prepare the porous carbon with high porosity, the shaddock peel biochar has a large number of micropores and mesopores, the micropores provide abundant active sites for ion storage and diffusion, and the specific capacitance can be improved. The mesopores provide more channels for the transportation of electrolyte ions, and are beneficial to the improvement of the rate capability. The invention also provides an electrode material prepared from the shaddock peel activated carbon, the electrode material is used as a proper electrode for capacitive deionization, the adsorption capacity of a system is increased, and the electrode material has high cycle stability.

The invention discloses an asphalt-based double-salt template porous carbon electrode material as well as a preparation method and application thereof, and relates to the technical field of porous carbon electrode materials. The preparation method sequentially comprises the following steps: adding asphalt into concentrated nitric acid, stirring for reaction, and washing to obtain a nitration product; and uniformly mixing the nitration product, active organic potassium salt and inert inorganic carbonate, performing ball milling, then performing pre-oxidation and carbonization treatment, and washing to be neutral to obtain the asphalt-based double-salt template porous carbon electrode material. The invention also discloses the asphalt-based double-salt template porous carbon electrode material and application of the asphalt-based double-salt template porous carbon electrode material in removal of nitrate radicals and ammonia nitrogen in a water body through a capacitive deionization technology. According to the invention, a macropore-mesopore-micropore synergistic hierarchical pore structure is constructed in an asphalt carbon skeleton through a double-salt template, efficient adsorption of two nitrogen pollutants of nitrate and ammonia nitrogen is realized, and the method has important practical application value.

The present invention belongs to the field of wastewater treatment technology, and specifically relates to a cascade treatment system and method for aquaculture wastewater based on photoelectrocatalytic degradation. The system includes: a solid-liquid separation device, a photoelectrocatalytic decomposition device, and a capacitive deionization device; the solid-liquid separation device is used to perform solid-liquid separation on aquaculture wastewater to obtain solid waste residue and waste liquid; the photoelectrocatalytic decomposition device is used to perform photoelectrocatalytic degradation on the waste liquid to remove organic matter in the waste liquid. The anode of the photoelectrocatalytic decomposition device is a composite photocatalyst, and the cathode is a modified activated biochar. The anode is used to catalytically degrade the organic matter in the waste liquid during photoelectrocatalytic degradation, and the cathode is used to provide active sites during photoelectrocatalytic degradation; the capacitive deionization device is used to remove charged particles from the waste liquid discharged from the photoelectrocatalytic decomposition device to remove organic matter. The system described in the present invention can be used to separate aquaculture wastewater with high turbidity step by step, achieving more efficient and energy-saving sewage degradation.

According to the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flowing electrode charging method, after a positive / negative flowing electrode is charged to adsorb ions, the potential difference of a system is improved by utilizing charges loaded on the surface of the positive / negative flowing electrode, so that the adsorption capacity on opposite-polarity charge ions is enhanced; meanwhile, an ultrasonic field is coupled to one side of a current collector of the flow electrode capacitive deionization device, and the collision contact frequency and the ion migration rate among active particles are improved by utilizing acoustic streaming and acoustic cavitation effects generated by ultrasound, so that the adsorption efficiency and the charge loading capacity of the flow electrode are improved. Compared with the prior art, the invention has the following beneficial effects: 1, the electric potential difference between the positive electrode and the negative electrode is increased by utilizing charges loaded on the surface of the flowing electrode, and the electric field driving force and the attraction force to anisotropic charge ions are enhanced, so that the ion adsorption efficiency is improved; and 2, the ultrasonic field is coupled with the flow electrode capacitive deionization device, so that the collision contact frequency and the ion migration rate among active particles in the flow electrode are improved, and the charge loading capacity of the flow electrode is further improved. And 3, compared with the traditional flow electrode capacitive deionization technology, the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flow electrode charging method has the advantages that the average desalination rate is improved by 223.78% or above, and the charge efficiency is improved from 70% or below to 90% or above.

There is provided a method for controlling at least one capacitive deionization (CDI) cell used for water desalination. The method comprises subsequent to feeding the at least one CDI cell with water at an initial flow rate, obtaining a measurement of an actual output concentration of water exiting the at least one CDI cell, comparing the actual output concentration to a concentration setpoint, determining, based on the comparing, a change to be applied to the initial flow rate for adjusting the output concentration towards the concentration setpoint, and outputting at least one control signal comprising instructions to cause the change to be applied to the initial flow rate to obtain a modified flow rate and to cause the at least one CDI cell to be fed with water at the modified flow rate.

The invention provides a membrane capacitive deionization module for treating brine with a high magnesium-lithium ratio as well as a preparation method and application of the membrane capacitive deionization module. The magnesium-lithium ratio of brine is 300-700, and the preparation method comprises the following steps: firstly, mixing and ball-milling an acid-washed lithium titanate molecular sieve, a binder, a conductive agent and a solvent, coating the surface of a whisker carbon nanotube membrane with the obtained slurry to form a coating, and then taking the whisker carbon nanotube membrane comprising the coating as an electrode, and assembling to obtain the membrane capacitive deionization module. Wherein the weight ratio of the acid-washed lithium titanate molecular sieve to the whisker carbon nanotube film is 1: (2-4). According to the membrane capacitive deionization module, efficient adsorption of lithium ions is achieved by utilizing high selectivity of the acid-washed lithium titanate molecular sieve, the whisker carbon nanotube membrane serves as a current collector, the module structure is simplified by utilizing high conductivity and large specific surface area of the whisker carbon nanotube membrane, rapid transmission of charges and uniform adsorption of the lithium ions are promoted, and the membrane capacitive deionization module is suitable for brine treatment; the method is especially suitable for brine with high magnesium-lithium ratio.

The invention discloses a method for preparing porous activated carbon based on pulse electrochemical activation, the porous activated carbon and application, and the method comprises the following steps: preparing a working electrode plate from carbon powder, and placing the working electrode plate in an electrolyte for pulse electrochemical square wave circulation treatment, wherein the electrolyte is an aqueous solution containing sulfuric acid, persulfate, sulfate and a cationic surfactant, stripping, cleaning and drying to obtain the porous activated carbon. According to the preparation method, the carbon powder is prepared into the working electrode plate, and the working electrode plate is subjected to pulse electrochemical square wave circulation treatment in the electrolyte containing the sulfuric acid, the persulfate, the sulfate and the cationic surface active agent, so that the porous activated carbon with large specific surface area, high electro-adsorption capacity and good conductivity can be prepared; when being used as a raw material for preparing a capacitive deionization electrode, the composite material shows good conductivity, high desalination capacity and high desalination rate, can be widely used for electro-adsorption desalination, and is high in use value and good in application prospect.

An electrode for a capacitive deionization device according to the concept described herein includes a current collector and an active material layer disposed on one surface of the current collector, in which the active material layer includes: a plurality of porous structures each including a plurality of carbon nanotubes; and a binder for fixing the plurality of porous structural bodies to the current collector, and each of the plurality of porous structural bodies includes a wide-bottom narrow-top structure that widens in a direction away from the current collector.

The application discloses a method for growing cobalt-iron-lanthanum ternary hydrotalcite on carbon felt in situ to prepare a phosphorus removal electrode, and belongs to the technical field of electrode preparation of capacitive deionization. The ternary hydrotalcite cobalt-iron-lanthanum hydrotalcite is synthesized on commercial carbon felt by using a one-step hydrothermal method. The preparation method does not need to use a binder and a conductive agent, and can better expose active sites of active materials, so that the removal efficiency of phosphorus is improved, economic benefits are remarkable, and the method has a wide application prospect.

The invention relates to a low-concentration nitrate nitrogen removal and conversion method based on functionalized flowing electrode slurry, which comprises the following steps: in a low-concentration nitrate nitrogen polluted water body, using the functionalized flowing electrode slurry to carry out capacitive deionization treatment under external first voltage so as to realize selective adsorption and concentration of nitrate nitrogen, the functionalized flowing electrode slurry comprises a carbon material which is modified by functional groups and has electrocatalytic activity; and carrying out electrochemical reduction reaction on the functionalized flowing electrode slurry subjected to nitrate nitrogen concentration under external second voltage, and reducing the adsorbed nitrate nitrogen into ammonia, so as to realize removal and recycling of the nitrate nitrogen. According to the invention, through a two-step process design of first transfer and second conversion, and by adopting the functionalized flowing electrode slurry, the two problems of deep removal and resource recovery of low-concentration nitrate nitrogen are effectively solved.

The application discloses a kind of high-salt mine water processing device and processing method, belong to high-salt mine water processing technical field, to solve at least one of the problems, such as huge energy, infrastructure complexity, unable batch processing wastewater in prior art high-salt mine water processing.The application, processing device, including anode flow electrode tank, cathode flow electrode tank, high-salt mine water tank, clean water tank and flow electrode capacitive deionization component;Flow electrode capacitive deionization component includes anode side current collector plate, cation exchange membrane, processing liquid cavity plate, anion exchange membrane and cathode side current collector plate in turn, anode flow electrode tank and anode side current collector plate are communicated to constitute anode flow electrode circulation loop, cathode flow electrode tank and cathode side current collector plate are communicated to constitute cathode flow electrode circulation loop, high-salt mine water tank, processing liquid cavity plate and clean water tank are communicated in turn to constitute high-salt mine water and clean water circulation loop.The application can be used for the processing of high-salt mine water.

The invention provides a keep-alive system, an ion concentration adjusting system and a refrigeration house. The keep-alive system comprises a salt solution providing unit, a capacitive deionization unit and a keep-alive unit, wherein the keep-alive unit is used for storing a product to be kept alive. A capacitive deionization unit is introduced into the keep-alive system, a salt solution providing unit provides an initial salt solution for the capacitive deionization unit, and the capacitive deionization unit is used for providing the salt solution in a target ion concentration range for a keep-alive unit to use after adjusting the ion concentration of the initial salt solution to the target ion concentration range required by a product to be kept alive. Therefore, a good keep-alive effect on products (such as marine aquatic products) to be kept alive is achieved. By introducing the capacitance removal unit, breakthrough can be achieved in the aspects of energy conservation, high efficiency, water quality stability, intelligent degree and multifunctional adaptability, the energy efficiency, intelligent level and applicability of the keep-alive system are improved, and the keep-alive survival rate and the system greening level are improved.