161 results about "Ion adsorption" patented technology

The invention discloses a modified hard carbon material, a preparation method thereof and a battery, and relates to the technical field of battery negative electrode materials. The preparation method comprises the following steps: forming a hard carbon layer by taking grafted silicon dioxide as a template, coating the hard carbon layer with a soft carbon layer, coating the soft carbon layer with silicon dioxide, performing confinement carbonization, and removing the template. Wherein the grafted silicon dioxide contains hetero atoms S, and the hard carbon layer contains hetero atoms P. During preparation, a silicon dioxide template grafted with 3-mercaptopropyltriethoxysilane is prepared by a reverse micelle method, a phenolic resin precursor is coated to form the hard carbon layer, P is introduced through modification of triglycidyl phosphate, then an asphalt-based soft carbon layer is coated, and carbonization is performed to obtain the modified phenolic resin. And removing silicon dioxide to obtain the target material. According to the material, active sites and interlayer spacing are increased through precise doping of S and P, volume expansion is relieved through cooperation of soft carbon and hard carbon, ion adsorption is enhanced through oxygen groups, and the material shows high capacity and excellent cycle stability in secondary batteries such as potassium ions and the like and is suitable for the field of novel energy storage batteries.

The application relates to a plasma adsorption dual-action industrial wastewater degradation equipment and a method thereof, and belongs to the technical field of environmental protection. Adsorption and desorption can be synchronously carried out, production efficiency is improved, power consumption and electrode loss are greatly reduced, and treatment of high-concentration and large-flow sewage is realized. The treatment depth of the application is excellent, the oxidation potential of plasma discharge can easily reach more than 20 electron volts, the oxidation potential of fluorine, which is the highest in chemical substances, is only 3.2 electron volts, and the higher oxidation potential means better treatment effect. Normal temperature and pressure operation, low operation cost. The application is suitable for most water quality (no requirements for the PH value, salinity and ammonia nitrogen of water), and the technology has excellent universality. Traditional adsorption technology inevitably produces a large amount of solid waste, and the treatment difficulty and treatment cost are high, which has become a pain point in the industry. The application avoids the generation of solid waste while improving the degradation efficiency of organic matters and reducing energy consumption.

The invention discloses a lithium manganate conductive material and a preparation method thereof, and the lithium manganate conductive material comprises a lithium manganate inner net layer which is a nano network layer formed by connecting lithium manganate crystal grains; the graphene and / or carbon nanotube conductive carbon outer net layer is deposited on the surface of the inner net layer. The lithium manganate crystal grains are uniform and fine, and the crystal grains are of a continuous net-shaped arrangement structure. Dissolving and mixing the polymer nanofiber, manganese salt, lithium salt and M-doped salt to form gel, drying, and carrying out two-stage programmed heating calcination in an oxygen-containing atmosphere to obtain a lithium manganate nano inner net layer; ultrasonically dispersing the lithium manganate nano inner net layer in water, adding acidified carbon nanotubes and / or graphene oxide dispersion liquid, and depositing the acidified carbon nanotubes and / or graphene oxide dispersion liquid on the surface of the inner net layer to form a conductive carbon outer net layer. The obtained lithium manganate conductive material has a continuous large-area two-dimensional network structure, shows high conductivity, high specific capacity and excellent cycling stability, and can be widely applied to the fields of lithium ion batteries, electrochemical lithium extraction, lithium ion adsorption and the like.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The utility model discloses integrated industrial circulating water ion removal equipment which comprises a shell, a first water inlet and a first water outlet are formed in the position, close to the bottom, of the end face of one side in the length extension direction of the shell, the first water inlet is connected with a water inlet pipe, and the water inlet pipe extends upwards in the shell and is connected with one end of a sterilization and algae removal groove; a second water outlet is formed in the other end of the sterilization and algae removal tank and connected with a water outlet pipe, a third water outlet of the water outlet pipe is formed in the position, close to the bottom, of one side of the adsorption cavity in the length direction, and a plurality of adsorption devices which are evenly distributed and can adsorb calcium and magnesium ions in water are arranged in the length direction of the adsorption cavity. An overflow port of an overflow pipe is formed in the other side of the adsorption cavity; the overflow pipe is connected with the first water outlet. By adopting the design scheme and the highly integrated design, the sterilization, algae removal and calcium and magnesium ion adsorption of the industrial hard water are simultaneously realized through one device, so that the industrial hard water is converted into soft water, and the soft water can be recycled.

The invention relates to the technical field of regional rare earth prediction, in particular to a landscape pattern and spatial statistics coupled ion adsorption type rare earth enrichment region prediction method, and the method comprises the steps: obtaining an ion adsorption type rare earth ore control index parameter set, rare earth abundance data and rare earth content actual measurement data of a target region; constructing an effect coefficient set according to the geological-hydrological index parameter set and the rare earth content measured data; constructing a landscape resistance field according to the landscape index parameter set to obtain the landscape resistance field; obtaining a spatial weight matrix; performing spatial autocorrelation analysis according to the rare earth abundance data and the spatial weight matrix to obtain spatial autocorrelation analysis indexes; performing rare earth enrichment probability index prediction according to the geological-hydrological index parameter set, the effect coefficient set, the landscape resistance field and the spatial autocorrelation analysis index to obtain rare earth enrichment probability index data; and performing rare earth enrichment area prediction on the target area according to the rare earth enrichment probability index data to obtain a rare earth enrichment area prediction result of the target area.

The invention relates to the technical field of rare earth resource exploration, in particular to an ion adsorption type rare earth content determination method, system, equipment and medium, and the method comprises the following steps: constructing a quantitative relation prediction model between normalized charge rate and total rare earth oxide mass fraction, arranging an impedance measurement system in a research area, and collecting impedance amplitude and phase; and obtaining a normalized charge rate based on the impedance amplitude and the phase, constructing a quantitative relation prediction model between the normalized charge rate and the total rare earth oxide mass fraction, and calculating to obtain the total rare earth oxide mass fraction based on the quantitative relation prediction model. According to the method, the surface electrical influence of the ion adsorption type rare earth ore sample is considered, the correlation between the spectrum induced polarization response and the chemical parameters is established, and the content of the rare earth oxide in the ion adsorption type rare earth sample is estimated by using the correlation.

The application discloses a modified hard carbon material and a preparation method and a battery thereof, and relates to the technical field of battery negative materials. The hard carbon layer is formed by using grafted silica as a template, then the soft carbon layer is coated outside the hard carbon layer, and then the silica is coated outside the soft carbon layer to limit carbonization and remove the template to obtain the target material; wherein the grafted silica contains a heteroatom S, and the hard carbon layer contains a heteroatom P; in the preparation, the silica template grafted with 3-mercaptopropyl triethoxysilane is prepared by a reverse micelle method, the phenol formaldehyde resin precursor is coated to form the hard carbon layer, P is introduced by modification of the trisglycidyl phosphate, and then the pitch-based soft carbon layer is carbonized, and then the silica is removed to obtain the target material. The material increases the active sites and the interlayer spacing by accurate doping of S and P, cooperatively relieves the volume expansion by the hard and soft carbons, and strengthens the ion adsorption by the oxygen groups, and exhibits high capacity and excellent cycle stability in the secondary batteries such as potassium ion batteries, and is suitable for the field of new energy storage batteries.

The invention relates to the technical field of supercapacitor preparation, in particular to a (NiCo) Se2 / CoFe2Se4 composite electrode, a preparation method and application, and the method comprises the steps: preparing a NiCo precursor solution through Ni salt, Co salt and urea, growing NiCo precursor nanorods on a titanium mesh, and constructing a three-dimensional conductive skeleton; then preparing a Co-FePBA suspension by using Co salt, sodium citrate and K3 [Fe (CN) 6]; the titanium mesh loaded with the NiCo precursor nanorod is soaked in Co-FePBA suspension and aged at the constant temperature, a double-active-component precursor is formed, effective interface chemical bonding is formed, and the charge transfer efficiency can be effectively improved; finally, a (NiCo) Se2 / CoFe2Se4 heterojunction is generated through gas-phase selenylation, charges are redistributed at a heterogeneous interface, a built-in electric field is formed, and electron transfer and ion adsorption are accelerated; according to the method, the reaction kinetics of collaborative optimization of the (NiCo) Se2 and the CoFe2Se4 is realized, the process is simple, convenient, environment-friendly and economical, a feasible scheme is provided for large-scale production, and the problems of compounding of the (NiCo) Se2 and the CoFe2Se4, high charge transfer resistance and poor charge and discharge efficiency in the prior art are solved.

The invention relates to an ether bond type covalent organic polymer (TPTF-AO) containing an amidoxime group and a synthesis method thereof. The method comprises the following steps: by taking 2, 4, 6-tri (4-hydroxyphenyl)-1, 3, 5-triazine and tetrafluoroterephthalonitrile as raw materials, constructing a covalent organic polymer precursor (TPTF) connected by a stable ether bond through nucleophilic substitution reaction of hydroxyl and fluorine atoms; further, the cyano group in the TPTF is subjected to amidoximation reaction under a mild condition and is efficiently converted into an amidoxime group, and the target product TPTF-AO is obtained. The polymer has a rigid skeleton connected by ether bonds and a mesoporous-macroporous composite pore channel structure, and has excellent chemical stability, thermal stability, rapid mass transfer capability and high-density metal ion coordination sites. The bottleneck that a traditional imine bond material is insufficient in stability is broken through, the problem that functional modification and skeleton stability are difficult to be compatible is solved, and the obtained material has wide application prospects in the fields of uranyl ion adsorption, catalysis, energy storage and the like.

The invention discloses a preparation method of a metal-containing closed-pore-rich hard carbon nanofiber material and application of the metal-containing closed-pore-rich hard carbon nanofiber material as a sodium-ion battery negative electrode material. The interior of the metal-containing hard carbon nanofiber material rich in closed pores contains metal, and the outer layer of the metal-containing hard carbon nanofiber material rich in closed pores is a carbon coating layer; the number of closed pores in the metal-containing hard carbon nanofiber material rich in closed pores is greater than the sum of the number of micropores and mesopores. The prepared metal-containing hard carbon nanofiber material rich in closed pores has sufficient sodium storage space, good sodium ion adsorption capacity and good electrolyte barrier property. The sodium storage capacity of the hard carbon negative electrode can be greatly improved, side reactions in the cycle process are inhibited, the cycle stability of the sodium-ion battery negative electrode is improved, and the performance is excellent. Meanwhile, the overall energy density of the battery can be further improved through the self-supporting integrated electrode structure design, and good application prospects are achieved.

This invention provides a battery separator with ion adsorption capabilities and its preparation method, belonging to the field of new energy battery technology. It solves the problem of battery capacity decay and deterioration of cycle performance caused by ion leaching damaging the SEI film and consuming active lithium. The battery separator of this invention includes a base film and a ceramic coating on at least one surface of the base film. The raw materials for preparing the ceramic coating include porous organic framework materials, metal ion chelating agents, ceramic particulate materials, wetting agents, and binders. This invention significantly improves the dispersion ability of the slurry and shortens the dispersion time by using metal ion chelating agents instead of traditional dispersants. Simultaneously, the use of binders containing specific functional groups crosslinks with the porous organic framework materials and forms a synergistic effect with the chelating agents, thereby jointly enhancing the battery separator's ability to adsorb metal ions. This effectively solves the problem of poor stability in high-energy-density battery systems, thus significantly improving the battery's energy density and cycle life.

The invention discloses a hierarchical collaborative constraint graph neural network algorithm for ion type rare earth grade prediction, and aims at the characteristics of complex three-dimensional grade space distribution, sparse drilling data and scarce covariables of ion adsorption type rare earth ore. The invention provides a two-stage improved graph convolutional neural network method for three-dimensional grade distribution prediction of ion adsorption type rare earth ores, which comprises the following steps: on the basis of sparse borehole data, performing graph construction on boreholes and units to be predicted to generate an undirected graph structure; and then introducing a constraint message passing graph encoder, an unsupervised MLP graph clustering module and a joint hierarchical supervision classification module, and constructing a three-dimensional grade prediction model suitable for irregular topology and strong spatial heterogeneity. According to the method, the grade high-value area and the grade low-value area in the three-dimensional space can be more accurately delimited, and a reliable three-dimensional decision basis is provided for in-situ ore leaching liquid injection engineering design and drill hole layout optimization.

The present invention discloses an ionic polymer-based ion adsorption type self-driven tensile sensor. An ionic polymer-based ion adsorption type self-driven tensile sensor according to one embodiment of the present invention comprises an ionic polymer composite material containing ions internally, and a first electrode and a second electrode having different work functions attached to the ionic polymer composite material, thereby forming a base potential through the difference in the amount of ions physically adsorbed to each electrode surface, and including a mechanism in which the ion concentration in the tensile direction within the ionic polymer thin film decreases in response to an external tensile stimulus, so as to detect the degree of change in the potential difference between the two electrode ends based on the change in the amount of ions adsorbed to the surfaces of the first and second electrodes, thereby providing a self-driven tensile sensor that measures the degree of tensile without an external power source.

The invention provides a large-interlayer-spacing two-dimensional COFs material as well as a preparation method and application thereof, and relates to the technical field of thorium ion adsorption materials. The material is prepared by reacting an amino monomer with an aldehyde group monomer containing crown ether. By embedding crown ether into a COFs skeleton, the challenge that flexible crown ether molecules may cause reduction of material crystallinity is effectively overcome, a two-dimensional network structure which is stable in structure and highly accessible in adsorption sites is formed, a relatively large interlayer spacing is presented, a good diffusion channel is provided for guest molecules, and the stability of the material is improved. And the hydration thorium ions enter interlayers to generate chemical chelation coordination with crown ether units in the lamellas. More importantly, based on the dual coordination effect of the crown ether unit and the imine bond on thorium ions, the material shows excellent adsorption capacity and selective recognition capability on thorium, can realize separation, enrichment and recovery of thorium ions in a complex system, and has wide application prospects in the fields of wastewater treatment, resource recovery and the like.

This invention discloses a method, system, and storage medium for predicting the adsorption performance of metal-organic framework (MOF) materials for noble metal ions in solution, belonging to the field of noble metal resource recovery. The method includes: collecting and organizing experimental data; organizing, screening, and quantifying the data to form a database; dividing the database into training and testing sets; constructing a stacked ensemble machine learning model for training; performing hyperparameter tuning using Bayesian optimization; using the tuned model for prediction to obtain the model's predictive performance; fitting the model using partial least squares (PLS) to calculate the importance scores of different variables, analyzing their influence on the amount of noble metal ion adsorption, and removing variables with low importance scores; using the trained stacked ensemble model to predict new experimental data and evaluating the predictive effect of the stacked ensemble model on the adsorption performance of MOFs. This invention can improve the accuracy of predicting the adsorption performance of MOF materials for noble metal ions in solution.

The present application relates to rare earth resources exploration technical field, specifically to a kind of ion adsorption type rare earth content determination method, system, equipment and medium, the method by constructing the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction, impedance measurement system is arranged in study area, impedance amplitude and phase are collected, normalized charge rate is obtained based on impedance amplitude and phase, the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction is constructed, and total rare earth oxide mass fraction is calculated based on quantitative relationship prediction model.The present application method considers the surface electrical property influence of ion adsorption type rare earth ore sample, establishes the correlation between frequency spectrum induced polarization response and chemical parameter, and estimates the rare earth oxide content in ion adsorption type rare earth sample using it.

This invention discloses a method for preparing nano-aluminum-based lithium materials and adsorbents using laminar plasma beams, belonging to the field of lithium-ion adsorption technology. This invention provides a simple, relatively mild, and highly repeatable method for preparing nano-aluminum-based lithium materials and adsorbents using plasma beams. In this invention, aluminum hydroxide and lithium chloride are mixed in a molar ratio of 2:1 to 1.3, and then evaporated and condensed by a plasma beam in a sealed space protected by an inert gas to obtain nano-aluminum-based lithium materials. These materials are then granulated with resin to obtain the adsorbent. This invention uses the controllable laminar arc heat generated by the plasma beam as a heat source, achieving physical high-temperature vaporization and simultaneous rapid condensation to form Al(OH)₂. 3 The nanomaterials with uniformly distributed LiCl molecules maximize the specific surface area of ​​the aluminum-based lithium adsorbent, resulting in superior adsorption capacity. This invention is produced in a fully enclosed manner under normal pressure, offering advantages such as safety, zero emissions, energy saving, environmental protection, short process, and continuous, efficient, and stable preparation.

The application discloses a FCDI system based on modified MOFs material derived carbon and application thereof in heavy metal ion removal, and relates to the field of environmental engineering and sewage treatment. Through modification operation on the MOFs derived carbon material in a liquid phase, a MOFs derived carbon material with a larger specific surface area than traditional carbon materials is obtained, and the MOFs derived carbon material has a stronger heavy metal ion adsorption capacity. Compared with a traditional FCDI system, the FCDI system based on the modified MOFs material derived carbon has the advantage of wide application range.

This invention belongs to the field of saline-alkali soil improvement technology, and discloses a sorghum straw biochar for saline-alkali soil improvement and its preparation method. The method uses sorghum straw as raw material, and prepares a modified biochar carrier through low-temperature plasma surface activation, in-situ hydrothermal growth of silicon-doped hydroxyapatite, and stepwise oxygen-limited pyrolysis. Then, a composite microorganism is loaded through an alkali-resistant composite encapsulation process to obtain the target product. This product can be used in moderately to severely saline-alkali soils, simultaneously achieving sodium ion adsorption, pH regulation, and slow nutrient release. It can improve the survival stability of the composite microorganisms in high-salt and high-alkali environments, achieving long-term improvement of saline-alkali soils.

The invention relates to the technical field of rare earth spectrum inversion, in particular to an ion adsorption type rare earth content spectrum inversion method fusing spatial context gating, which comprises the following steps of: constructing an ion adsorption type rare earth mineralization evaluation index system for extracting multi-dimensional spatial prior characteristic data of a region; performing spatial context modeling on the extracted multi-dimensional spatial prior feature data to construct spatial context feature data so as to form environment and geological preconditions required by an ore deposit for systematic modeling, extracting spectral feature data through hyperspectral data of an unmanned aerial vehicle, and performing spatial context feature data extraction through hyperspectral data of the unmanned aerial vehicle; according to the method, complex spectrum fingerprints presented by carrier clay minerals serving as mineralization products are deeply excavated and extracted, and the rare earth content inversion is performed in combination with the spatial context characteristic data and the spectrum characteristic data, so that the accuracy of the rare earth content inversion is improved.

This application relates to a deionization device for an electrolytic cell system. The electrolytic cell system includes a main circulation path, which comprises an electrolytic cell and a circulation container connected by pipelines. The deionization device includes a deionization circulation branch, whose inlet and outlet are respectively connected to different locations at the lower part or bottom of the circulation container. Along the flow direction of the electrolyte, the deionization circulation branch is sequentially equipped with a first conductivity sensor, a deionizer, and a second conductivity sensor. The deionizer is filled with a mixed-bed resin for ion adsorption. The deionization device of this application can effectively control the conductivity in the circulating electrolyte.

The application discloses a kind of corrosion-resistant ultrafiltration membrane, three (4-carboxyl phenyl) imidazole as MOF organic ligand, with graphene, metal ion in emulsion interface reaction, MOF plane and graphene plane are realized by metal ion coordination structure, then after calcination, obtain porous carbon material, after crushing, with PVDF compound obtains the ultrafiltration membrane with strong corrosion resistance, strong metal ion adsorption performance and good mechanical property, can be used for waste battery sewage heavy metal ion adsorption.

The invention relates to a power plant desulfurization wastewater treatment method and system.The treatment method comprises the steps that desulfurization wastewater is mechanically filtered through a bag filter, and pretreated wastewater with the turbidity smaller than or equal to 5 NTU is obtained; adding modified activated carbon or a chelating resin adsorbent into the pretreated wastewater, and adsorbing heavy metal ions; the pretreated wastewater is introduced into a multi-stage membrane separation system for water-salt separation, and strong brine and recyclable fresh water are obtained; introducing the strong brine into a forced circulation evaporation crystallizer for evaporation and concentration to obtain inorganic salt crystals. Through a synergistic process of mechanical filtration, multi-stage membrane separation, evaporative crystallization and heavy metal adsorption, suspended solids, heavy metals and excessive salts in the high-salinity wastewater are efficiently removed, the separation purity and recovery rate of resources such as gypsum and sodium chloride are improved, the energy consumption of evaporative crystallization and the treatment cost are reduced, and the method is suitable for industrial production. The requirements of pollution treatment, cost control and resource recovery are effectively balanced, and the economic bottleneck in the prior art is broken through.

The invention belongs to the technical field of environmental engineering and material science, and particularly relates to a hydroxyl-containing zinc zeolite imidazole framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a zinc precursor and an imidazole ligand in proportion by adopting a mechanochemical method, mechanically grinding under the assistance of a small amount of water, washing and drying. The obtained material is of a microporous structure, the specific surface area is 500-2000 m < 2 > / g, the particle size is 20 nm-50 [mu] m, and the defect rate is high. The method has the advantages that the preparation process is green, environment-friendly, rapid, efficient and suitable for mass production, and the coordination capability can be enhanced through the synergistic effect of hydroxyl and imidazole groups of the residual raw materials. The obtained material can be used for heavy metal ion adsorption, especially has high removal rate and high adsorption capacity (50-600 mg / g) for radioactive uranium elements, and has wide application prospects in the field of environmental restoration.

The invention belongs to the technical field of battery materials, and particularly relates to a composite positive electrode material, a preparation method thereof, a positive plate and a secondary battery. The composite positive electrode material comprises an N-doped MXene carrier and a positive electrode active material grown in the N-doped MXene carrier in situ, the positive electrode active material comprises metal element doped lithium iron phosphate, and the positive electrode active material has a rice-grain-like morphology structure. In the composite positive electrode material, N-doped MXene serves as a three-dimensional conductive skeleton, pyridine nitrogen and pyrrole nitrogen provide defects due to doping of N atoms, and N-doped MXene serves as a lithium ion adsorption site to improve pseudocapacitance contribution. According to the lithium iron phosphate, grains are refined through metal doping, the b-axis and unit cell volume of the lithium iron phosphate are shortened, and Li-O bonds are increased, so that a lithium ion diffusion channel is shortened, and the diffusion rate is increased. Due to the rice-like morphology structure, the diffusion distance of lithium ions in the positive electrode active material is greatly shortened, and the rate capability is improved.

The invention belongs to the technical field of electrode materials, and particularly relates to a FePO4-coated MHM composite material and a preparation method and application thereof. In order to improve the stability and selectivity of a CDI electrode material, a pseudocapacitance material FePO4 is combined with a double-electrode-layer material MHM (MXene of a three-dimensional hollow microsphere structure) with a pseudocapacitance attribute, the FePO4-MHM composite material is successfully prepared, FePO4 particles are uniformly distributed on the surfaces of MXene-based hollow microspheres, a three-dimensional structure with a high specific surface area and rich ion adsorption sites is formed, and the stability and selectivity of the CDI electrode material are improved. The FePO4-coated MHM composite material also shows excellent desalination performance in a CDI device.

The present application relates to the technical field of calcium carbonate manufacturing, and particularly relates to a preparation method of high-whiteness light calcium carbonate. The method comprises the following steps: efficient leaching of calcium element in carbide slag; preparation of microbial crystal form control agent; and electric dispersion treatment and precipitation of calcium ions. The microbial crystal form control agent is prepared by adjusting the mixing ratio of Bacillus pumilus fermentation liquor and Pseudomonas fluorescens fermentation liquor, so that Ca 2+ The stearic acid and sodium polyacrylate in the microbial crystal form control agent can make the particles more stable and provide ion adsorption capacity after the larger calcium carbonate particles are mineralized, CO2 is introduced after temperature rising, and the crystal form of the calcium carbonate is optimized, so that the vaterite type crystallization with smaller crystal form is formed. The Bacillus pumilus can also assist in generating small-particle-size calcium carbonate over time, so that the high-whiteness small-particle-size light calcium carbonate is obtained.

The invention belongs to the technical field of water treatment, and particularly relates to a bipolar membrane device for preparing high-purity acid and alkali. A bipolar membrane structure with three compartments is adopted for arrangement and comprises a positive electrode, a negative electrode and a membrane stack, and the membrane stack sequentially comprises an anode membrane, a cation adsorption porous fibrous filler, a bipolar membrane, an anion adsorption porous fibrous filler, an acid-resistant anion membrane, a salt chamber and an anode membrane; the cation adsorption porous fibrous filler and the anion adsorption porous fibrous filler are obtained through the processes of base material preparation, functional group introduction and post-treatment. The device provided by the invention has the advantage that high-purity acid and alkali can be realized by operating the device provided by the invention.