319 results about "Ionic adsorption" patented technology

The invention discloses an ion adsorption type rare earth ore prospecting method based on a multi-element composite mineralization mode, and belongs to the technical field of rare earth ore geological exploration. The method comprises the following steps: firstly, collecting the existing exploration and research data of the known granite weathered crust type rare earth deposit; analyzing the ore-forming basic elements of the known granite weathering crust ion adsorption type rare earth ore deposit; then field geological survey and sample collection are carried out on the known granite weathered crust ion adsorption type rare earth ore deposit; determining each metallogenic mode element by utilizing analysis test data and field survey data; analyzing the formation cause of the ore deposit, establishing a prospecting mark, and constructing a multi-component composite mineralization mode of the granite weathering crust type rare earth ore deposit. And finally, prospecting target area prediction is carried out. For the known high-altitude granite weathering crust ion adsorption type rare earth deposit, multiple exploration technologies are organically fused, the special environment of the high-altitude area is optimized, a multi-element composite mineralization mode is constructed, and brand-new theoretical guidance and technical means are provided for prospecting of ion adsorption type rare earth ore in the high-altitude area.

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

The invention discloses an anti-corrosion fireproof coating applied to a new energy battery box and a preparation method, and relates to the technical field of industrial coatings, the anti-corrosion fireproof coating comprises the following specific components: a base resin system, a curing agent, a functional filler system, a flame retardant system, a solvent system and an auxiliary agent system; the anticorrosive and fireproof coating further comprises additives, wherein the additives specifically comprise a functionalized MXene loaded lithium ion adsorbent, a metal organic framework encapsulated quaternary phosphonium salt, polyaryletherketone coated antimony trioxide nano-particles and boron-nitrogen co-doped graphene aerogel powder; the material is prepared based on the materials. According to the invention, multiple additives are synergistically introduced into a traditional basic coating system, and on the basis of a basic flame-retardant and anti-corrosion structure, lithium ion directional adsorption, gas-phase free radical active intervention, high-temperature carbonization barrier construction and three-dimensional thermal barrier network configuration are further realized; therefore, the multi-dimensional safety performance of the coating in battery thermal runaway, salt spray corrosion and high-temperature impact environments is remarkably improved.

The invention relates to the field of ginsenoside extraction, in particular to a device and method for removing a plasticizer in a ginsenoside extract, and the device comprises a roll-over stand, a removal cabin and the like. According to the equipment and the method for removing the plasticizer in the ginsenoside extract, the filtering assembly and the adsorption resin blocks are distributed in the removal cabin in the vertical direction, so that fine filtering treatment and adsorption removal treatment of a ginsenoside extract solution are completed in sequence; and in addition, the filter assembly and the plurality of adsorption resin blocks can be subjected to backwashing treatment in a mutually separated state, so that the overall treatment process steps of the backwashing treatment work are reduced on the basis of ensuring that efficient backwashing treatment is synchronously performed on the filter assembly and all the adsorption resin blocks. The defects that multiple treatment devices need to be used in multiple filtering treatment and ion adsorption treatment processes of the ginsenoside extract solution, the plasticizer removal treatment efficiency is affected, and the plasticizer removal treatment period is delayed are overcome.

The invention provides a composite polyaluminum ferric chloride water purifying agent as well as a preparation method and application thereof, and belongs to the technical field of waste resource recycling and municipal sewage treatment. The industrial hazardous waste aluminum ash is subjected to innocent treatment and then reacts with the pickling steel waste liquid of the steel mill, and the polyaluminum ferric chloride meeting the industrial standard is prepared. The polyaluminum ferric chloride and a cationic adsorbent are compounded according to a specific proportion to obtain the composite polyaluminum ferric chloride water purifying agent. According to the method provided by the invention, the resource recycling of hazardous wastes is realized, and the composite polyaluminum ferric chloride water purifying agent obtained by the method is used for treating municipal sewage, so that the treated water quality can reach the first-grade discharge standard A.

The invention discloses a fly ash-based adsorbent as well as a preparation method and application thereof, and belongs to the technical field of adsorbent materials. The fly ash-based adsorbent is prepared from the following raw materials: modified fly ash, modified lignin, activated carbon, polyethylene glycol polyvinyl alcohol grafted copolymer, titanate and metal oxide. The coal ash is subjected to ball milling and acid modification treatment, and a surfactant is introduced, so that the adsorption sites and the adsorption efficiency of the coal ash are increased. Through the synergistic effect of the raw materials, the prepared fly ash-based adsorbent can efficiently adsorb fluorine ions in wastewater, and the fluorine ion removal rate can reach 99% after adsorption is performed for 30 min.

The invention discloses a production process of an efficient polyaluminum chloride-based composite flocculant, which includes adding tourmaline into ethanol for low-temperature ball milling treatment to obtain tourmaline fine powder; performing low-temperature grinding treatment on vermiculite, then successively adding tourmaline, aluminum isopropoxide and trichloromethylsilane and stirring, and obtaining a prefabricated vermiculite carrier after dispersion and granulation; standing the prefabricated vermiculite carrier for 1-2 h, then standing at a constant temperature for 3-5 h, then soaking it in an alkali solution for 20-30 min, performing ultrasonic treatment for 5-10 min, filtering and sintering to obtain porous mixed vermiculite; mixing dimethyldiallylammonium chloride and polyaluminum chloride evenly, then putting them into the porous mixed vermiculite and stirring evenly, then performing microwave oscillation treatment for 1-2 h, taking out the porous mixed vermiculite particles, which are the prefabricated flocculant; standing the prefabricated flocculant for 1-2 h, and obtaining an efficient flocculant after freeze-drying. The invention utilizes vermiculite to improve the sedimentation characteristics of the flocculant, combines with the negative ion adsorption of tourmaline, aggregates the flocs of dimethyldiallylammonium chloride and polyaluminum chloride, reduces the dispersion problem of the flocs, and achieves the balance of adsorption, sedimentation and flocculation.

The invention discloses a preparation method of nitrogen-doped hierarchical pore hollow carbon spheres, and relates to the technical field of electrochemical desalination, the preparation method comprises the following steps: carrying out polycondensation on melamine and formaldehyde in the presence of PVP to form a spherical template; resorcinol and HMTA form a phenolic resin coating layer on the surface of the template; calcining at high temperature to realize decomposition and carbonization of the template, and introducing double bonds through a silane coupling agent; introducing a phosphoryl chloride group through free radical polymerization; finally, grafting a sulfonic acid group through nucleophilic substitution to obtain a final product. The nitrogen-doped hollow carbon spheres with a hierarchical pore structure are prepared through a hollowing strategy and surface modification, and N, P and S ternary heteroatom synergy is realized through introduction of a phosphoryl chloride group and a sulfonic acid group, so that the material has high specific surface area, optimized pore structure and strong ion exchange capacity; the composite material shows excellent ion adsorption performance and cycling stability, and has a good application prospect in the field of capacitive deionization.

The invention discloses a relative permeability improver for efficient water control and oil increase and a preparation method thereof, belonging to the field of oil and gas field development. The relative permeability improver is a multi-component copolymerized polyacrylamide synthesized from acrylamide, sodium acrylate, 2-acrylamido-2-methylpropanesulfonic acid, a sulfonate ion-containing hydrophobic monomer, and a cationic adsorption monomer. The sulfonate ion-containing hydrophobic monomer and the cationic adsorption monomer are simultaneously introduced to cooperate with each other. Through the mutual synergy of the monomers, the water control and oil increase capability of the relative permeability improver in porous media is significantly improved, the flow resistance of the water phase in the porous medium is effectively increased, and the flow resistance of the oil phase can be further reduced due to the lubrication effect, thereby unexpectedly achieving an oil permeability effect, achieving an excellent water control and oil increase effect, and being able to have significant permeability selectivity under heterogeneous oil reservoir conditions. The invention provides key material support for the development of high-water-content oil and gas resources, ensuring the goal of efficient development of high-water-content oil and gas resources.

The invention discloses equipment and a method for preparing an electronic-grade salicylic acid solution. The equipment comprises an acidification tank, an alkali tank, a micron filter, an anion filter, a cation adsorption column and a nano filter. The acidification tank is used for loading a salicylic acid solution and an acidic substance, and the alkali tank is used for loading an eluent. The method comprises the following steps: firstly, removing large impurities from a salicylic acid solution and acidic substances through a micron filter, then conveying the salicylic acid solution and acidic substances to an anion filter, adsorbing salicylic acid through anion adsorption resin to obtain phenol, removing the phenol, then introducing an eluent, washing off the salicylic acid solution, conveying the salicylic acid solution to a cation adsorption column to remove metal ions, and finally conveying the salicylic acid solution and the acidic substances to a nano filter to obtain the purified salicylic acid. And reducing the granularity of the salicylic acid solution to obtain the electronic-grade salicylic acid solution. The electronic-grade salicylic acid solution has the advantage of strong selective complexing ability to metals, and has a good wet etching effect in the integrated circuit manufacturing process.

The present invention relates to the field of lithium adsorption, and in particular to a lithium ion adsorption material and a preparation method and application thereof. The lithium ion adsorption material comprises a core and a shell; the core of the lithium ion adsorption material comprises: polyvinyl chloride; the shell of the lithium ion adsorption material comprises: polyvinyl chloride, a lithium ion sieve and a porogen. The lithium ion adsorption material has a large adsorption capacity, strong acid and alkali resistance, and stable adsorption capacity.

The invention provides a processing method and application of seaweed mud-based biochar. The method comprises the following steps: (1) cleaning and deodorizing treatment: adding water into seaweed mud, stirring, precipitating and separating impurities, adding a sodium hydroxide solution, carrying out alkali washing and swelling, removing impurities and fishy smell, and forming a porous structure; (2) adding an iron salt solution for pretreatment to enable the seaweed mud to adsorb iron ions, filtering after adsorption is completed, and performing ball milling on a filtered product to obtain ball-milled seaweed mud particles; (3) pre-oxidizing in an air atmosphere, raising the temperature to 160-180 DEG C, and keeping the temperature for 2-5 hours; and (4) performing pyrolysis under the protection of nitrogen, heating to 900-1300 DEG C, and keeping the temperature for 8-16 hours to obtain the seaweed mud-based biochar. Through the steps of cleaning, alkali washing, ferric salt adsorption, pre-oxidation, pyrolysis and the like, impurities are effectively removed, the structure of the seaweed mud is improved, the mechanical property and conductivity of the seaweed mud are improved, and the seaweed mud can serve as an adsorption material or a fiber additive.

The invention relates to a counter-ion adsorption high-voltage electrostatic spraying device and application thereof to preparation of a food sugar coating, and belongs to the technical field of equipment machinery and food processing. The device comprises a material conveying system, a high-voltage electrostatic spraying system, a sugar liquid supply system, a gas supply system, a sugar liquid recovery system, a microwave vacuum drying system and a control cabinet, the sugar liquid supply system and the gas supply system are both connected with the high-voltage electrostatic spraying system, the material conveying system is arranged below the high-voltage electrostatic spraying system, the material conveying system is connected with the microwave vacuum drying system, and the sugar liquid recovery system is further arranged below the material conveying system; the above systems are all controlled by a control cabinet. Through pulse switching of a high-voltage electrostatic field and a sugar liquid material, counter-ion charge accumulation of sprayed sugar liquid is realized, namely, positive charge sugar liquid (chitosan and the like) and negative charge sugar liquid (Arabic gum, carrageenan and the like) are alternately sprayed under the high-voltage electrostatic field, so that electrostatic adsorption and directional deposition of the sugar liquid on the surface of food are realized.

The invention relates to the field of adsorption materials, and discloses a lithium ion adsorbent and a preparation method and application thereof. The lithium ion adsorbent comprises a polyvinyl chloride molecular chain and a polymer molecular chain A, wherein the polymeric molecular chain A comprises a structural unit I from crown ether containing vinyl and a structural unit II from a vinyl silane modified lithium ion sieve. The vinyl silane modified lithium ion sieve in the lithium ion adsorbent can be connected with a polymer molecular chain through a chemical bond, so that the lithium ion sieve can be uniformly dispersed on a polymer skeleton, and the lithium ion adsorbent has excellent structural stability, high adsorption capacity and high magnesium-lithium selectivity; and the solution loss rate of the lithium ion sieve is obviously reduced.

The invention discloses an additive, an electrolyte and a battery. The additive is pyridinium propane sulfonate. The additive provided by the invention can regulate and control the physicochemical properties of the electrolyte. At the interface of the zinc negative electrode and the electrolyte, polar functional groups pyridine and sulfonate ions are adsorbed on the surface of the negative electrode of the battery, so that on one hand, water molecules in the electrolyte can be prevented from being contacted with the zinc electrode, thereby inhibiting hydrogen evolution corrosion and passivation reaction caused by water decomposition; and on the other hand, the diffusion mode of zinc ions on the surface of the electrode can be regulated and controlled, and regular and compact electro-deposition of the zinc ions is induced, so that formation and growth of zinc dendrites are prevented at a relatively large probability. Meanwhile, sulfonate ions can be complexed with zinc ions, water molecules in solvation sheaths are eliminated, and the degree of side reaction is weakened. In conclusion, after the additive is used, the performance of the battery is remarkably improved.

The invention relates to the technical field of biomedical materials, and discloses an antibacterial hemostatic material and a preparation method thereof, the antibacterial hemostatic material comprises the following components by weight: 2-3 parts of amino acid terminated polyurethane, 1-3 parts of thiolated chitosan, 3-5 parts of sodium alginate, and 2-4 parts of a polyvinyl alcohol solution. Through the synergistic effect of amino acid terminated polyurethane-sulfhydrylated chitosan-sodium alginate, a dual hemostatic mechanism of physical adsorption-chemical coagulation promotion is constructed: sodium alginate as a natural polysaccharide has strong hydrophilicity and cation adsorption capacity, can quickly absorb moisture in wound blood, concentrate platelets and coagulation factors, and has a good hemostatic effect; thrombin activation is accelerated, and the blood coagulation time is shortened; the antibacterial hemostatic material disclosed by the invention has relatively good antibacterial and hemostatic effects.

The invention discloses a relative permeability improver capable of efficiently controlling water and increasing oil and a preparation method thereof, and belongs to the field of oil-gas field development. The relative permeability improver is multi-component copolymerized polyacrylamide which is synthesized by acrylamide, sodium acrylate, 2-acrylamido-2-methylpropanesulfonic acid, a sulfonate ion-containing hydrophobic monomer and a cationic adsorption monomer; meanwhile, a sulfonate ion-containing hydrophobic monomer is introduced to be matched with a cationic adsorption monomer, through mutual cooperation of the monomers, the water controlling and oil increasing capacity of the relative permeability improving agent in a porous medium is remarkably improved, the flow resistance of a water phase in the porous medium is effectively improved, and meanwhile the oil phase flow resistance can be further reduced due to the lubricating effect; the unexpected oil permeation effect is achieved, the excellent water control and oil increase effects are achieved, and the obvious permeability selection performance can be achieved under the heterogeneous oil reservoir condition; key material support is provided for development of high-water-content oil and gas resources, and the efficient development target of the high-water-content oil and gas resources is guaranteed.

The invention discloses a sodium ion adsorbent which comprises the following components: 30 to 55 weight percent of SiO2, 0 to 30 weight percent of Al2O3, 0 to 30 weight percent of TiO2, 30 to 60 weight percent of K2O and 0 to 5 weight percent of Re2O3 or / and ZrO2, the Re2O3 is one or more of Gd2O3, Yb2O3, La2O3 and Y2O3, and the Al2O3 and TiO2 are not 0 at the same time.

A preparation method of a high-activity nitrogen-doped carbon-loaded CoRu nano-alloy is used for enhancing pH universal hydrogen evolution, and is characterized by comprising the following steps: dissolving dopamine hydrochloride in an aqueous solution containing H2O2 and CuSO4. 5H2O, and magnetically stirring to form a uniform mixture; and pre-wetting carbon cloth with ethanol, immersing the pre-wetted carbon cloth in the dopamine solution for 10 minutes, taking out the pre-wetted carbon cloth, washing the pre-wetted carbon cloth with deionized water for three times, and carrying out vacuum drying to obtain the polydopamine modified carbon cloth marked as PDA / CC. And immersing the obtained PDA / CC into 20 mL of aqueous solution containing Co (NO3) 2.6 H2O and RuCl3 for 6 hours to realize metal ion adsorption. And washing and drying a sample, and calcining the sample in a tubular furnace at 700 DEG C in an N atmosphere for 2 hours to obtain the self-supporting nitrogen-doped porous carbon-loaded CoRu alloy material which is recorded as CoxRu (at) CN / CC. Through a synthesis strategy based on active ion capture and in-situ carbon thermal reduction, and through construction of a nitrogen-doped carbon cobalt ruthenium alloy nanostructure and a strong metal-carrier synergistic effect, efficient hydrogen overflow and establishment of stable active sites are realized; therefore, the performance bottleneck that high activity and high stability of a traditional electrocatalyst in a wide pH range are difficult to cooperate is broken through.

The invention discloses a method for preparing a sandwich type composite membrane capable of efficiently adsorbing heavy metal ions, and belongs to the field of water pollution treatment. The preparation method comprises the following steps: firstly, carrying out hydrolysis modification on polylactic acid particles, then dissolving the polylactic acid particles in dichloromethane / N, N-dimethylformamide to prepare an outer-layer spinning solution, and meanwhile, mixing polyvinyl alcohol, sodium alginate and polyethyleneimine to prepare an inner-layer spinning solution; performing electrostatic spinning on the outer-layer spinning solution to obtain an outer-layer film named as an outer-layer PLA film, performing electrostatic spinning on the inner-layer spinning solution to obtain an inner-layer film named as an inner-layer PVA / SA / PEI film, and re-spinning the outer-layer PLA film on the other side of the inner-layer PVA / SA / PEI film by using the outer-layer spinning solution, namely wrapping the inner-layer PVA / SA / PEI film with the two outer-layer PLA films to form a sandwich structure; and finally, obtaining the composite membrane by adopting a calcium ion cross-linking process. The composite membrane can efficiently adsorb metal ions, is high in adsorption performance retention rate and good in strong acid stability, and is suitable for selective iron removal of electroplating wastewater.

The present invention relates to a process for separating rubidium ions from saline solutions rich in other monovalent ions, particularly sodium and potassium. The process relies on rubidium ions adsorption via ion exchange performed by metal-hexacy anoferrate particles. The process of the present invention provides pure rubidium salt with estimated production costs that do not exceed 20% of the current price.

The invention provides a preparation method of biomass-derived porous carbon with ionic adsorption potential, which comprises the following steps: adding disodium ethylene diamine tetraacetate and ferrous chloride into water, and uniformly mixing to obtain EDTA-Fe; the preparation method comprises the following steps: sequentially adding an acetic acid-sodium acetate buffer solution and a biomass material into EDTA-Fe, uniformly mixing, adding aluminum chloride, carrying out a hydrothermal reaction to obtain a primary product, cleaning the primary product, and drying to obtain biomass hydrothermal carbon; the preparation method comprises the following steps: soaking biomass hydrothermal carbon in a saturated solution of potassium carbonate, then carrying out solid-liquid separation, firstly drying a solid obtained by separation, then calcining in a nitrogen atmosphere, and cleaning to obtain the biomass derived porous carbon. The biomass hydrothermal carbon prepared by the method has regular and controllable morphology, abundant surface functional groups and a stable carbon skeleton structure, and shows excellent electrochemical performance.

The invention belongs to the technical field of modified polyvinyl alcohol (PVA) sizing agents used for textile warp sizing, and discloses a preparation method of anionic PVA textile sizing agents, which comprises the following steps: firstly treating PVA raw materials with a sodium hydroxide solution to generate sodium polyvinyl alcohol; then, sodium polyvinyl alcohol reacts with an etherifying agent halogenated acetic acid to generate carboxymethyl etherified PVA; according to the method disclosed by the invention, non-ionic PVA can be modified into anionic carboxymethyl PVA, and the anionic carboxymethyl PVA can be efficiently adsorbed by a common cationic adsorbent, so that recycling of PVA slurry in the desizing waste liquid is realized, damage of the desizing waste liquid to a water environment can be greatly reduced, and the method has relatively great application potential.

The invention discloses a preparation method of a porous polymer for wastewater treatment, which comprises the following steps: preparing porous gel and preparing a gel flocculant, namely preparing a gel precursor solution from acrylamide, hydroxyethyl acrylate and phenylboronic acid, mixing and reacting with an adsorbent solution, and drying to obtain porous dry gel particles; and carrying out in-situ reaction on the porous xerogel particles to graft the temperature and pH dual-response copolymer. The porous xerogel particles are used as a carrier of the ion adsorbent, the specific surface area of the material is greatly increased through the porous structure, and the adsorption capacity of ions in sewage is improved; and the temperature and pH dual response of the copolymer wrapped in the outer layer or the holes is utilized, so that outstanding flocculation adsorption and sedimentation effects are achieved in an alkaline low-temperature solution, rapid flocculation and sedimentation can be achieved through subsequent heating or acid neutralization, and subsequent dehydration reduction treatment of the flocculant is facilitated.

The invention belongs to the field of rare earth extraction processes, and particularly relates to a closed-loop dressing and smelting process for coal-series associated rare earth mineral resources based on a DESs solvent. Comprising the following steps: taking a sample, carrying out ball milling, adding a leaching agent into the sample after ball milling, leaching the ion adsorption type rare earth elements in the sample, and stirring to obtain a turbid solution; adding a precipitant into the leachate, and then carrying out solid-liquid separation to obtain supernate and precipitates; taking supernate and analyzing the extraction efficiency of the rare earth elements through inductively coupled plasma mass spectrometry (ICP-MS); and adding deionized water into the obtained supernate to recover the leaching agent for next use. The invention aims to obtain a series of deep eutectic solvent (DESs) systems capable of efficiently leaching coal series associated rare earth mineral resources, so that the efficient separation and leaching of ion adsorption type rare earth elements in coal ores are realized; and by utilizing the reversibility of DESs, the recycling of the DESs solvent and the closed-loop dressing and smelting process of coal-series associated rare earth mineral resources are realized.

The invention relates to the technical field of agricultural fertilizers, in particular to a slow / controlled-release fertilizer for saline-alkali soil and a preparation method of the slow / controlled-release fertilizer. The slow / controlled-release fertilizer sequentially comprises a core layer, an inner coating, a shell layer and an outer coating from inside to outside, the core layer comprises a functional aid, diammonium hydrogen phosphate, urea, isobutylidene diurea, potassium nitrate and biochar; a shell layer contains bagasse, a compound strain and fulvic acid; the coating material is an adhesive containing montmorillonite powder; the functional additive is loaded with an organic acid and polymethacrylamide network through modified diatomite, so that the synergistic effect of sodium ion adsorption, acid-base regulation and nutrient slow release is realized; through the multi-layer structure design and the component synergistic effect, it is guaranteed that the slow and controlled release fertilizer can improve the saline-alkali soil structure in a long-acting mode, accurately regulate nutrient release and improve the stress resistance of crops, and the slow and controlled release fertilizer is suitable for efficient utilization of saline-alkali soil.

The present invention provides a sulfonic acid-modified colloidal silica which has excellent long-term stability of metal adsorption amount and is capable of suppressing the amount of residual abrasive grains on a polished metal surface after polishing and cleaning.　This sulfonic acid-modified colloidal silica contains silica particles, and is characterized in that: (1) the surfaces of the silica particles are modified with a sulfonic acid group; (2) the Cu ion adsorption amount of the silica particles is 5.00-110.00 µmol / g; (3) the ratio (Cu ion adsorption amount (µmol / g) / S content (µmol / g)) of the Cu ion adsorption amount to the S content of the silica particles is 0.50 or more; and (4) the rate of change over time of the Cu ion adsorption amount of the silica particles is 1.30 or less as measured by the measurement method described below. [Measurement method of the rate of change over time of the Cu ion adsorption amount of the silica particles] The sulfonic acid-modified colloidal silica is left to stand at 25°C for 3 months. The Cu ion adsorption amount (µmol / g) of the silica particles before standing and the Cu ion adsorption amount (µmol / g) of the silica particles after standing are measured and the rate of change over time of the Cu ion adsorption amount of the silica particles is calculated by the following formula. (Rate of change over time of Cu ion adsorption amount of silica particles) = (Cu ion adsorption amount (µmol / g) of silica particles after standing) / (Cu ion adsorption amount (µmol / g) of silica particles before standing)

The invention provides a preparation method and application of a biomass ash-based zeolite molecular sieve adsorbent, and relates to the field of solid waste utilization. The preparation method of the biomass ash-based zeolite molecular sieve adsorbent comprises the following steps: crushing and grinding biomass ash, uniformly mixing with sodium hydroxide, roasting in a muffle furnace to obtain biomass ash clinker, mixing the biomass ash clinker with deionized water, stirring, and aging to obtain aged slurry; carrying out hydrothermal reaction on the aged slurry, separating out solid precipitate, and drying to finally obtain the biomass ash-based zeolite molecular sieve adsorbent. The method overcomes the defects in the prior art, the ash of a biomass power plant is used as a raw material, the zeolite molecular sieve with excellent adsorption performance is prepared through alkali fusion roasting activation and hydrothermal synthesis, and the zeolite molecular sieve has good lead ion adsorption performance.

The present invention discloses a fly ash-based adsorbent and a preparation method and application thereof, and belongs to the technical field of adsorbent materials. The fly ash-based adsorbent comprises the following raw materials: modified fly ash, modified lignin, activated carbon, polyethylene glycol polyvinyl alcohol graft copolymer, titanate and metal oxide; wherein the fly ash is ball-milled, acid-modified and a surfactant is introduced to increase the adsorption sites and adsorption efficiency of the fly ash. The fly ash-based adsorbent prepared by the present invention through the synergistic effect between the raw materials can efficiently adsorb fluoride ions in wastewater, and the fluoride ion removal rate can reach 99% after adsorption for 30 minutes.

The invention discloses high-covering inorganic-organic coated titanium dioxide as well as a preparation method and application thereof, and belongs to the field of titanium dioxide. Rutile type titanium dioxide is added into a dispersing agent and is matched with 0.6-0.8 mm zirconium beads (the filling rate is 65%-80%) for sanding, silicate ions in sodium silicate are adsorbed on the surface of rutile type titanium dioxide, titanium dioxide is difficult to agglomerate, the dispersion uniformity of rutile type titanium dioxide particles in slurry is improved, the particle size is controlled to be uniform, and the light scattering efficiency is optimized; the preparation method comprises the following steps: adding an acidic aluminum salt and an alkaline aluminum salt at a specific temperature in a parallel flow manner, carrying out inorganic coating, adding an organic matter, carrying out organic coating, and finally obtaining the titanium dioxide through gas powder, and the titanium dioxide has the advantages of high titanium dioxide whiteness, low oil absorption, excellent glossiness and excellent covering power.