54 results about "Ion imprinted" patented technology

The invention relates to a chromium-targeted adsorbing material as well as a preparation method and application thereof. The preparation method of the targeted chromium adsorption material comprises the following steps: S1, crushing, sieving and pyrolyzing stems of potassium-rich plants to obtain biomass carbon; s2, dispersing biomass carbon in a solvent, adding Cr < 6 + > template ions, Cr < 3 + > template ions, a functional monomer, a cross-linking agent and an initiator for reaction, and washing and drying after reaction to obtain an ion imprinted polymer; and S3, dissolving a reduction barrier agent in a solvent, adding the ion imprinted polymer, and reacting at room temperature to obtain the chromium-targeted adsorption material, the potassium-rich plants are plants with the total potassium mass content of 5%-8%. The long-acting reduction adsorption material for targeted remediation of heavy metal Cr < 6 + > / Cr < 3 + > polluted soil and underground water is prepared, has extremely high specific selectivity and efficient adsorbability, and has obvious advantages in the aspects of heavy metal treatment efficiency, continuity and acid interference resistance.

The invention provides Cr (VI) ion imprinted biomass carbon aerogel microspheres and a preparation method and application thereof.The preparation method comprises the steps that a bubble-rich mixed solution of gelatin, chitosan, glacial acetic acid, sodium bicarbonate and lauryl sodium sulfate is dripped into alkali liquor, and Cr (VI) ion imprinted biomass hydrogel microspheres are obtained through a surface ion imprinting technology; and carrying out freeze drying and high-temperature carbonization to prepare the Cr (VI) ion imprinted biomass carbon aerogel microspheres. The inner part of the large-hole interconnected thin-wall structure is of a three-dimensional interpenetrating network structure. When the pH value is equal to 2, the Cr (VI) ion imprinting biomass carbon aerogel microsphere has a Cr (VI) ion removal rate of 99% or above, has a wide pH working range, and has a Cr (VI) ion removal rate of 70% or above when the pH value is equal to 1-5. In the presence of interfering ions, the selectivity coefficient K value of the Cr (VI) ion imprinted biomass carbon aerogel microspheres to Cr (VI) ions is far greater than 1, and the Cr (VI) ion imprinted biomass carbon aerogel microspheres have a relatively large relative selectivity coefficient K'value, and still show the highest adsorption capacity to the Cr (VI) ions in the coexistence of various heavy metal ions.

The invention discloses a synthesis method and application of a beta-cyclodextrin aluminum citrate ion imprinting material, and the synthesis method comprises the following steps: S1, pouring beta-cyclodextrin, citric acid and monopotassium phosphate into a bottle filled with a deionized water solution, uniformly mixing, and carrying out water bath heating reaction to synthesize a beta-cyclodextrin / citric acid precursor; s2, sequentially pouring aluminum sulfate octadecahydrate, ethylene glycol dimethacrylate and ammonium persulfate into a bottle, and performing water bath heating reaction to synthesize a crude product of a beta-cyclodextrin / aluminum citrate ionic polymer; s3, drying the crude product in the bottle; s4, washing the crude product with deionized water, filtering and drying, and grinding and modifying with ethanol; and S5, soaking in a sodium hydroxide solution, washing with deionized water until the pH value is neutral, and drying to obtain the beta-cyclodextrin / aluminum citrate ion imprinted material. The synthesis process and process are simple, and the beta-cyclodextrin is simple in source and low in cost. The mechanical strength and the acid resistance of the prepared product are greatly improved, and the prepared product has the characteristics of proper strength, stable adsorption under an acidic condition and the like.

The invention discloses gallium ion imprinted amidoxime-based macroporous resin as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials and separation. The method comprises the following steps: pre-assembling a gallium trichloride template and monomers such as acrylonitrile, generating monodisperse liquid drops by utilizing a microfluidic technology, polymerizing by combining ultraviolet light, eluting the template by hydrochloric acid, and performing amidoximation modification by a hydroxylamine hydrochloride alkaline solution, thereby obtaining the resin. The resin is a monodisperse spherical microsphere, has a macroporous structure, has high selective recognition capability and high adsorption capacity on gallium ions, is fast in adsorption kinetics and good in regeneration performance, and is suitable for selectively separating or enriching gallium ions from a complex solution system.

The invention provides a method for recycling and extracting rare earth elements in tailings, and belongs to the technical field of recycling and extracting rare earth elements in tailings. Predicting a three-dimensional flow field and setting liquid injection parameters by using a three-dimensional seepage grid adaptive subdivision algorithm and a permeability three-dimensional geological statistical model, and adaptively adjusting the ammonia adding amount according to a saponification state evaluation function and model prediction control; the leachate is pumped into a functionalized ion imprinted polymer adsorption column, selective adsorption is achieved through an online pH micro-control system, finally, a rare earth oxide product is obtained through gradient elution and firing, and a detection result is fed back to a model training data set; the technical problem that saponification extraction and adsorption separation procedures cannot be adaptively regulated and controlled due to the fact that the rare earth ion concentration and the impurity ion concentration of the leachate cannot be accurately predicted in real time in the leaching process is solved.

The present application belongs to the technical field of high-value utilization of mineral resources and water treatment adsorption separation materials, and relates to a sepiolite-based lithium ion imprinting polymer, a preparation method and application in adsorption and separation of lithium ions in low-grade brine. The sepiolite is activated and pretreated, mixed with a lithium ion template, a functional monomer, a crosslinking agent and an initiator in a solvent system, and then subjected to a polymerization reaction, elution of the template ion, filtration, washing and drying to obtain the sepiolite-based lithium ion imprinting polymer. The sepiolite-based lithium ion imprinting polymer has good structural stability, lithium ion recognition selectivity and cyclic regeneration performance, and is suitable for efficient enrichment and separation of lithium ions in low-grade brine.

The invention relates to the technical field of electrochemical analysis, and discloses an electrochemical detection method for chloride ions in zinc electrolyte, which adopts a glassy carbon substrate-graphene-silver nanocluster-chloride ion imprinted polymer three-layer composite electrode. According to the invention, by constructing a graphene-silver nanocluster-chloride ion imprinted polymer three-layer composite electrode interface, the electrode function is reconstructed from three dimensions of ion recognition, spatial isolation and electron transfer; the problems of sensitivity attenuation and selectivity deterioration caused by synergistic interference of high-concentration Zn < 2 + > and SO4 < 2-> in a zinc electrolyte system in a traditional voltammetry method are fundamentally solved. According to the method, complex sample pretreatment is not needed, expensive instruments and equipment are not needed, in-situ, real-time and high-precision detection of the chloride ions can be achieved on an industrial site, and a key technical support is provided for intelligent control and energy efficiency optimization of a zinc electrolysis process.

The invention provides a copper ion imprinted cross-linked grafted chitosan adsorbent and a preparation method thereof. The preparation method comprises the following steps: adding an initiator into a mixed solution of a copper ion template agent and a chitosan solution to obtain a first reaction solution; carrying out grafting reaction on the first reaction solution to obtain a second reaction solution; adding a cross-linking agent into the second reaction liquid, carrying out cross-linking curing, and carrying out solid-liquid separation to obtain an intermediate; and eluting the copper ions in the intermediate to obtain the copper ion imprinted cross-linked grafted chitosan adsorbent. A solvent of the chitosan solution comprises water and unsaturated carboxylic acid. According to the preparation method disclosed by the invention, an ion imprinting technology is combined with crosslinking and grafting modification, so that the copper ion imprinting crosslinking grafted chitosan adsorbent is endowed with higher stability and selectivity, and the cyclic regeneration performance of the copper ion imprinting crosslinking grafted chitosan adsorbent is improved; the adsorption kinetics and the adsorption thermodynamics of the copper ion imprinted cross-linked grafted chitosan adsorbent are optimized.

The invention relates to a preparation method of a multi-cross-linked hydrophilic copper (II) ion imprinted polymer, which belongs to the field of functional high polymer materials and comprises the following two steps: firstly, carrying out free radical copolymerization on an allyl tertiary amine salt modified salicylaldoxime copper (II) complex, a first tonality monomer, a first cross-linking agent and a water-based initiator in water, neutralizing after reaction, filtering and drying to obtain a second tonality monomer; a cross-linked polymer containing copper ions and tertiary amine groups is obtained; the preparation method comprises the following steps: firstly preparing a quaternary ammonium cation hydrophilic cross-linked polymer, then dissolving the quaternary ammonium cation hydrophilic cross-linked polymer in an organic solvent, reacting with an unsaturated alkylation reagent to generate a polymerizable quaternary ammonium cation hydrophilic cross-linked polymer, then adding a second tonality monomer, a second cross-linking agent and an initiator for secondary copolymerization, and finally preparing an imprinted polymer in a hollow resin ball, porous membrane or fiber form through a precipitation, membrane forming or spinning process. The solid-phase anion and cation dual-extraction agent for copper (II) ion imprinting and counter ions thereof is suitable for high-selectivity enrichment and deep extraction separation of copper (II) ions in various water systems, and has the function and characteristic of simultaneously extracting counter anions.

The application discloses a kind of ion imprinting self-assembly high tower nitro compound fertilizer and preparation method thereof, it is related to fertilizer technical field, nitro compound fertilizer raw material is made into matrix granule;Template metal salt, functional monomer containing olefin bond, solid crosslinking agent, hydrophobic modifier and thermal initiator are uniformly mixed, and self-assembly coating powder is made;Make self-assembly coating powder adhere to the surface of matrix granule;After coating, matrix granule is transferred into drum, and under the condition of 40 DEG C~60 DEG C, 60%RH~90%RH, 5r / min~15r / min, it is ripened 4h~12h, and ripened granule is obtained;Ripened granule is screened, and is dried, and ion imprinting self-assembly high tower nitro compound fertilizer is obtained.The application is by self-assembly coating powder adhering to the surface of matrix granule, ion imprinting crosslinked polymer layer and surface hydrophobic layer are formed by wet heat ripening, metal ion slow-release function can be realized and anti-caking performance is endowed to granule.

The invention relates to the technical field of electrochemical analysis, and discloses a cobalt ion detection method based on an ion imprinted polymer modified electrode, and the method comprises the following steps: constructing a microfluidic system, and carrying out electrochemical polymerization by enabling a precursor solution to dynamically flow through the electrode to realize uniform growth of a modification layer and dynamic embedding of Co < 2 + >; then applying pulse potential to efficiently elute Co < 2 + >; and finally, performing electrochemical detection after re-combining to-be-detected Co < 2 + >. According to the scheme, imprinting sites are uniformly distributed, the template agent is rapidly and efficiently eluted, and the cobalt ion detection performance, reproducibility and preparation efficiency are remarkably improved.

The invention discloses a sweat lead ion detection sensor and a preparation method and application of an electrode of the sweat lead ion detection sensor, and relates to the field of sweat detection sensors, and the preparation method of the sensor electrode comprises the following steps: dispersing Bi-BDC MOF in an organic solvent to obtain an MOF suspension, coating a preset area of a paper-based carbon electrode with the MOF suspension, drying and curing to obtain an electrode intermediate cured with the Bi-BDC MOF; dispersing a carbon nanotube and a cysteine functionalized ion imprinted polymer in an organic solvent to obtain a polymer suspension, coating the polymer suspension on the region, where the Bi-BDC MOF is cured, of the electrode intermediate, and drying and curing again to obtain an electrode substrate; the electrode substrate is placed in a pyrrole solution for pyrrole electropolymerization reaction, and the sensor electrode is obtained after the reaction is completed. According to the sensor electrode prepared by the invention, sensitive detection of the sensor on sweat lead ions can be realized.

The invention provides a polymer-based copper ion imprinted chitosan adsorbent and a preparation method thereof. The preparation method comprises the following steps: mixing copper ion imprinted chitosan, a pore-forming agent and a polymer solution to obtain polymer gel; and dropwise adding the polymer gel into a cooling liquid, and solidifying to obtain the polymer-based copper ion imprinted chitosan adsorbent. A polymer with excellent creep resistance, fracture toughness and solvent corrosion resistance is adopted as a coating material to coat copper ion imprinted chitosan, and meanwhile, a pore forming agent is introduced, so that the polymer-based copper ion imprinted chitosan adsorbent with a three-dimensional porous network structure is constructed; the adsorbent is endowed with stable cyclic regeneration performance, and unification of high adsorption capacity, rapid dynamics and cyclic stability is realized.

The invention relates to a gallium ion imprinted covalent organic framework adsorbent as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and water pollution treatment. The preparation method comprises the following steps: taking Ga (III) as a template ion to form a template-ligand compound with pyrogallic acid, taking the template-ligand compound as a structure-directing agent, and guiding melamine to be subjected to polycondensation polymerization in the presence of formaldehyde, so as to obtain the high-molecular polymer. The invention relates to a gallium ion imprinted covalent organic framework adsorbent which is a gallium ion imprinted covalent organic framework adsorbent marked as Ga-IIP-PFCOF, and a melamine-pyrogallic acid covalent organic framework which is constructed in situ, has a regular porous structure and is rich in gallium ion specific recognition sites. Ion imprinting holes with matched spatial configuration and complementary chemical environment are formed on the framework of the gallium ion imprinting covalent organic framework adsorbent, and the gallium ion imprinting covalent organic framework adsorbent has ultrahigh adsorption capacity and excellent selectivity on gallium ions.

This invention relates to the interdisciplinary fields of environmental engineering, solid waste resource utilization, and advanced functional materials technology, specifically to a method for targeted recovery of heavy metals from municipal sewage sludge. The method discloses a method for targeted recovery of heavy metals from municipal sewage sludge. First, a magnetic nanomaterial with a hydrophilic brush layer and a surface ion-imprinted layer is prepared. Then, the sludge is acid-dissolved to obtain a leachate, and the material is added to selectively adsorb the target heavy metals. After magnetic separation, desorption is performed using a low-voltage pulsed electric field. Finally, the desorbate is purified by iron removal, and high-purity copper is recovered by constant-potential electrodeposition. This invention achieves highly selective capture and recovery of heavy metals in complex systems, and the material is recyclable, possessing good industrial application prospects.

This invention discloses a method for preparing an aqueous thermosensitive Cr(III) ion-imprinted polymer, belonging to the field of water pollution treatment technology. The method includes the following steps: (1) dissolving aminated multi-walled carbon nanotubes and potassium carbonate in N,N-dimethylformamide, and adding bromopropylene to obtain vinylated multi-walled carbon nanotubes; (2) dissolving CrCl3·6H2O, a functional monomer, and a thermosensitive monomer in a porous solvent composed of ethanol and water, adding vinylated multi-walled carbon nanotubes, ethylene glycol dimethacrylate, and azobisisobutyronitrile to obtain the Cr(III) ion-imprinted polymer. This invention introduces the thermosensitive functional monomer N-isopropylacrylamide, enabling the ion-imprinted polymer to respond to changes in ambient temperature and accurately identify and adsorb target ions in complex environments. The introduction of the thermosensitive functional monomer allows the polymer to form a hydrophilic layer, reducing non-specific adsorption caused by impurities such as humic acid, and improving the adsorption capacity and selectivity for target ions.

The application discloses a wastewater copper recovery treatment process of a PCB production line, and belongs to the field of PCB processing. 2+ The wastewater copper recovery treatment process comprises the following steps: determining the Fe 2+ content in wastewater, adding hydrogen peroxide into the wastewater with the molar ratio of hydrogen peroxide to Fe 2+ being 1:2-3, maintaining the pH at 2-2.5, reacting for 1-1.5 hours, removing the precipitate through filtration, and obtaining a first mixed solution; adding the first mixed solution into a three-stage reactor, adjusting the reaction pH of each stage of the three-stage reactor through a slow-release alkali agent, and obtaining a second mixed solution; mixing and reacting the ion imprinting polymer suspension and the second mixed solution through a microreactor; and desorption and electrolysis. The application excludes the influence of other substances on copper recovery.

The invention discloses an As (III) and Cd (II) ion imprinting electrochemical sensor and an electrochemical detection method. The sensor takes a glassy carbon electrode as a substrate, an amino-functionalized zirconium-based metal organic framework material is modified by a dispensing method, and then bismuth nanoparticles are deposited on the surface of the amino-functionalized zirconium-based metal organic framework material to form a composite interface. Then, an As (III)-Cd (II) double-template ion imprinted polymer membrane based on the simulated and optimized functional monomer proportion is constructed on the composite interface, and AsCd-IIM / NH2-UiO-66 (Zr) (at) Bi / GCE is obtained. The sensor shows a good linear relationship in a concentration range of 0.0002 to 32.3 [mu] mol. L <-1 >. The detection limit is as low as 1.3 * 10 <-10 > mol.L <-1 > (S / N = 3). Compared with a traditional detection method and a non-imprinted control group, the sensor and the detection method developed by the invention show higher sensitivity and anti-interference capability.

The invention discloses a magnetic lead ion imprinted polymer material as well as a preparation method and application thereof, and belongs to the technical field of magnetic ion imprinted materials. According to the method, 1, 3, 5-tri (4-aminophenyl) benzene and 2, 5-divinyl-1, 4-phthalaldehyde are adopted as monomers, and the magnetic COF material with high porosity is successfully constructed on the surface of Fe3O4 (at) SiO2 (at) KH-570 through Schiff base reaction. A magnetic COF material is used as a substrate, through a surface imprinting strategy, double bonds on the surface of the magnetic COF material and vinylpyridine are subjected to an ion imprinting polymerization reaction, and the ion imprinting-magnetic covalent organic framework material (MCOF (at) IIP) is prepared. The method has the advantages of being simple and rapid to operate, mild in reaction condition and easy to control, and the prepared product is high in porosity, good in stability and high in adsorption selectivity and has wide application prospects in the aspects of adsorption removal and extraction separation of heavy metal ions.

The present application relates to the field of ion imprinting detection, discloses a paper-based chip for ion imprinting detection of metal ions in the environment and a preparation method thereof; the grafted quantum dots are prepared by the amidation reaction of chitosan and CdTe quantum dots, the occurrence of non-radiative recombination is reduced, the surface electrical environment is changed, the probability of non-radiative transition is reduced, so that the fluorescence emission intensity and quantum yield are improved, meanwhile, the high adhesion of chitosan can also effectively prevent the aggregation of quantum dots and improve the stability of quantum dots in aqueous solution. The chitosan is grafted with polydopamine and deposited on the surface of the glass fiber paper base together with polyethyleneimine, the copolymer of polydopamine and polyethyleneimine has strong adhesion and can build a firm polymer coating on the surface of the fiber; meanwhile, the polyethyleneimine can help to adsorb Cu 2+ , further improving the reliability of the paper-based chip in the detection process.

This invention relates to the field of adsorption and separation technology, specifically to an ion-imprinted polymer material and its applications. The ion-imprinted polymer is prepared according to the following steps: 4-acetoxystyrene or a mixture of 4-acetoxystyrene and other olefin monomers are polymerized under the action of an initiator to obtain a polymer; hydrazine hydrate is added to the polymer solution for hydrolysis to obtain a polymer containing phenolic hydroxyl groups; after dissolving the phenolic hydroxyl-containing polymer, template ions are added for spontaneous coordination; the resulting coordination product undergoes a crosslinking reaction with formaldehyde to obtain the ion-imprinted polymer material. The ion-imprinted polymer material prepared by this invention exhibits strong selective recognition and adsorption capabilities, as well as a high selective adsorption capacity.

The invention discloses a magnetic ion imprinted polymer as well as a preparation method and application thereof. The preparation method of the magnetic ion imprinted polymer comprises the following steps: 1) dispersing a functional monomer and template molecules in a solvent for pre-assembly to obtain a complex solution; 2) dispersing the oleic acid-coated modified Fe3O4 particles, a cross-linking agent and an initiator by using a solvent, and then adding into the complex solution for polymerization reaction to obtain a magnetic polymer; and 3) washing the magnetic polymer with an eluent to obtain the magnetic ion imprinted polymer. The magnetic ion imprinted polymer can specifically recognize and adsorb Sb oxygen-containing anions, is easy to separate from wastewater, is easy to regenerate, can be used for efficiently recovering and recycling antimony in antimony-containing wastewater, and is simple in preparation method, easy in raw material obtaining, low in production cost and suitable for large-scale industrial production and application.

The invention discloses a biochar material for recycling rare and precious metals from waste solar cells and a preparation method of the biochar material, and relates to the technical field of biochar materials. When the biochar material for recycling the rare and precious metals from the waste solar cells is prepared, firstly, biomass raw materials are dried, smashed, carbonized and carboxylated, and then biochar is prepared; growing a metal organic framework on the surface of the biochar in situ to prepare metal organic framework modified biochar; enabling the metal organic framework modified biochar to react with paraformaldehyde and diethyl phosphite to prepare phosphating modified biochar; reacting the phosphatized modified biochar with 3-bromopropylene to obtain modified biochar; and coating the surface of the modified biochar with an ion imprinting layer to prepare the biochar material for recycling rare and noble metals from waste solar cells. The biochar material for recycling rare and precious metals from waste solar cells prepared by the invention has the advantages of selective ion adsorption, high adsorption capacity and recyclability.

The application discloses a preparation method of Cr(III) ion imprinted material and belongs to the technical field of adsorbing material preparation. The preparation method of the Cr(III) ion imprinted material comprises the following steps: reacting chitosan and glutaraldehyde to obtain a Schiff base; adding the Schiff base and 2,4-diamino-6-methyl-1,3,5-triazine into acetic acid to react to obtain a functional monomer; then adding the functional monomer into a CrCl3 solution to react, and then adding epichlorohydrin to react at 30-70 DEG C for 4-12 hours to obtain a Cr(III) imprinted polymer; and finally eluting the Cr(III) imprinted polymer to obtain the Cr(III) ion imprinted material. The application does not need to add a substrate carrier, the functional monomer prepared by the reaction of chitosan, glutaraldehyde and 2,4-diamino-6-methyl-1,3,5-triazine can be used as the functional monomer and the solid substrate carrier at the same time in the application. In addition, the polymerization reaction system in the application is carried out in a non-toxic aqueous phase, has the advantages of being green, non-toxic and non-polluting, and the polymerization reaction can be completed without adding an initiator in the system.

The application provides an arsenic ion imprinted TiO2 photocatalytic material prepared by using a plant as a template, a preparation method and application thereof. The preparation method comprises the following steps: firstly mixing an alcohol solution of tetrabutyl titanate, a crosslinking agent and an initiator to obtain a TiO2 precursor solution; secondly mixing the TiO2 precursor solution with arsenic imprint template ions to obtain a TiO2 precursor solution loaded with the arsenic imprint template ions; thirdly mixing and then impregnating, in sequence, an activated plant template and the TiO2 precursor solution loaded with the arsenic imprint template ions, and then performing a solvothermal reaction to obtain a biological template TiO2; the arsenic imprint template ions are arsenite; and finally removing the biological template and the arsenic imprint template ions from the biological template TiO2 to obtain the arsenic ion imprinted photocatalytic material. The trivalent arsenic ion imprinted TiO2 photocatalytic material provided by the application can specifically remove trivalent arsenic anions in water, and has excellent arsenic removal effect.

The invention relates to a method for recycling gallium, copper and indium according to a proportion in a waste thin-film photocell and then coating a film, which comprises the following steps of: (1) pretreating and leaching a waste copper-indium-gallium-selenium thin-film solar cell to obtain a leaching solution containing gallium, copper and indium elements; (2) taking a gallium thiourea complex, a copper thiourea complex and an indium thiourea complex as template ions, taking TA, AM and AA as functional monomers, introducing a temperature-sensitive block copolymer PDEA-b-P (DEA-co-AM), taking NMBA and EGDMA as cross-linking agents, and carrying out polymerization reaction to obtain the multi-template intelligent ion imprinted polymer; (3) adjusting the pH value of the leachate, and preparing a diluted solution from the leachate and excessive TC; (4) adding a multi-template intelligent ion imprinted polymer into the diluted solution for proportional adsorption; (5) carrying out desorption treatment by adopting a mixed solution of HCl and thiourea to obtain a desorption solution; and (6) spin-coating a molybdenum-coated soda-lime glass substrate with the desorption solution, and carrying out annealing treatment to obtain a precursor film to react with selenium to generate the light absorption layer material of the CIGS thin-film solar cell. According to the invention, remanufacturing is simply and efficiently realized.

The present application relates to a kind of temperature response type ion imprinted magnetic mesoporous microspheres and its application in selectively capturing uranium in high-salt wastewater;The preparation method of the present application comprises the following steps: first, magnetic mesoporous silica nanospheres are prepared, and imprinted microspheres are synthesized on the shell of magnetic mesoporous silica (Fe3O4@mSiO2) by free radical polymerization with uranium ions as template ions;The heat response structure of the adsorbent can effectively realize U (VI) desorption by changing temperature, which provides a solution to solve secondary pollutants and material damage in high-salinity uranium-containing wastewater treatment, and is expected to be widely used in high-salt wastewater and uranium extraction from seawater.

The invention discloses preparation of an ion imprinted polymer adsorbent and application of the ion imprinted polymer adsorbent in preparation of battery-grade lithium dihydrogen phosphate. The method comprises the following steps: firstly, preparing Fe3O4 coated SiO2 by taking nano Fe3O4 as a magnetic core and tetraethoxysilane, and then carrying out imprinting polymerization on lithium dihydrogen phosphate as a template and a mixed functional monomer under the action of a cross-linking agent to obtain a crude product; and finally, eluting the template to obtain the magnetic ion imprinted polymer adsorbent. The adsorbent can be used for specifically adsorbing lithium dihydrogen phosphate ions from low-concentration lithium, high-impurity brine or a lithium chloride solution, the application process of the adsorbent comprises the steps of adsorption, desorption, evaporation concentration, step-by-step cooling crystallization and drying, battery-grade lithium dihydrogen phosphate with the purity larger than or equal to 99.5% is finally obtained, and the lithium comprehensive yield reaches 90% or above. The process provided by the invention does not need to remove impurities in advance, has high selectivity, can recycle the adsorbent, has the characteristics of simple flow, low energy consumption, environmental friendliness and suitability for large-scale production, and has remarkable environmental protection and economic benefits.

The application provides an imprinted mesoporous material for adsorbing rare earth ions and a preparation method thereof. The method comprises the following steps: (1) subjecting pretreated biomass waste to hydrolysis treatment to obtain chiral nanocrystals; (2) reacting a solution containing the chiral nanocrystals in step (1), a silane coupling agent modified by a functional monomer, a silicon source and an imprinted ion source to obtain a precursor material; and then subjecting the precursor material to evaporation drying and double-template removal treatment in sequence to obtain the ion imprinted mesoporous material. The efficient independent ion imprinted mesoporous film prepared by the application meets the use requirements of high adsorption capacity and high selectivity, realizes effective utilization of biomass waste resources, and is beneficial to recycling of low-concentration rare earth ions in mineral waste residue tail liquid.

The application discloses an ion imprinted covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of organic polymer porous materials. 2v The symmetrical functional monomer, the planar six-coordination metal marked ion and the solvent are ultrasonically mixed to obtain a C3 symmetrical six-site coordination complex; a solvent-dispersed C3 symmetrical node monomer is added into the C3 symmetrical six-site coordination complex system and ultrasonically mixed again, then a catalyst solution is added and ultrasonically reacted to obtain a reaction product; the reaction product is post-treated to obtain a metal covalent organic framework ion imprinted COFs precursor; the metal covalent organic framework ion imprinted COFs precursor is dispersed in a sulfuric acid solution for elution, and then post-treated to obtain the ion imprinted covalent organic framework material. The method solves the problems of difficult control of crystallinity, difficult scale synthesis and inability to construct a specific coordination environment.