184 results about "Ionic adsorption" patented technology

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 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 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 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 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 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.

The invention discloses an anti-radiation medical protective glove and a production process thereof, and belongs to the technical field of medical protective gloves, a polydopamine hollow microsphere is prepared by using ZIF-8 as a self-sacrifice template, bismuth and gadolinium elements are loaded through hydrothermal synthesis and ion adsorption, a composite shielding microsphere is prepared, and the composite shielding microsphere is used for preparing the anti-radiation medical protective glove. Then, the composite shielding microspheres and a nano starch enhanced cross-linked network are synergistically introduced into a natural latex matrix, after dipping forming, a hydrophilic / hydrophobic wetting gradient is constructed on a glove lining through mask auxiliary plasma etching, and the anti-radiation medical protective glove is prepared. Through the cooperation of the shielding function of the composite microspheres, the mechanical enhancement of a nano starch cross-linked network and the surface one-way moisture conduction function, the glove has excellent radiation protection performance and also has the characteristics of being light, flexible and comfortable to wear, the problems that a traditional lead rubber glove is heavy, rigid and poor in air permeability are effectively solved, and the service life of the glove is prolonged. The system is especially suitable for medical scenes requiring high flexibility and comfort, such as interventional radiosurgery.

The invention relates to the technical field of building materials, in particular to a composite saltpetering-resistant agent, saltpetering-resistant and yellowing-resistant colored facing mortar and a preparation method thereof.The composite saltpetering-resistant agent comprises a cation adsorption phase, a light stabilization phase and a hydrophobic phase; the cation adsorption phase is of a porous skeleton structure and comprises zeolite activated by acid and modified by organic functional groups; the light stable phase is a core-shell structure nano-composite and comprises a metal oxide core and a silicon dioxide shell; silanol groups of the hydrophobic phase are covalently bonded with hydroxyl groups on the surfaces of the cationic adsorption phase and the light stable phase. According to the technical scheme provided by the invention, the core problems of saltpetering, yellowing and insufficient durability of traditional facing mortar are synergistically solved by constructing a triple protection mechanism of chemical adsorption, physical barrier and light stability, the key indexes such as the saltpetering-resistant qualification rate, the weather resistance grade and the strength retention rate of the facing mortar can be improved, and the facing mortar has the advantages of high strength, high durability and the like. Furthermore, the decoration effect durability and the engineering applicability of the colored facing mortar are improved.

The invention discloses a visual efficient chloride ion removal adsorbing material and a preparation method and application thereof.The adsorbing material is prepared by the steps that hollow glass microspheres serve as a carrier, and hollow glass porous particles are synthesized from a mixture of hollow glass microsphere powder and a pore forming agent through a sol-gel method; the preparation method comprises the following steps: modifying the surface of a porous adsorption material through a low-temperature plasma bombardment technology to enhance the adsorption performance on chloride ions, and loading magnetic iron oxide nanoparticles on the porous adsorption material to prepare the chloride ion adsorption material; the adsorption material has the characteristic of environmental friendliness, not only can efficiently adsorb chloride ions in a water body, but also can realize the visualization of the adsorption process through the density difference before and after adsorption, has the characteristics of repeated use and easiness in regeneration, and has relatively high market application prospect and economic value.

The invention discloses a covalent organic framework (CD-COF-Li) applied to a solid-state lithium battery electrolyte material. The synthesis of the covalent organic framework comprises the following process steps: step 1, synthesizing carboxymethyl-beta-cyclodextrin; step 2, synthesizing carboxymethyl-beta-cyclodextrin sulfonic acid; step 3, synthesizing carboxymethyl-beta-cyclodextrin lithium sulfonate; the prepared covalent organic framework (CD-COF-Li) material has the characteristics of relatively good ion conductivity, inhibition of lithium dendrites, improvement of battery safety, energy density and process compatibility, a continuous ion transmission channel is formed by using the highly ordered porous structure, high porosity and structural order of the material, an ion diffusion energy barrier is effectively reduced, a lithium ion conductor is introduced, and the performance of a lithium ion battery is improved. The ion adsorption and migration capability is enhanced, and the problems of ion conductivity and stability balance of the solid-state battery electrolyte and lithium dendrites and side reactions of a lithium metal negative electrode are solved.

The application provides a biomass-based composite electrode material, an electrode sheet and a hybrid supercapacitor, and belongs to the technical field of electrochemical energy storage. 3 The biomass-based composite electrode material comprises: a biomass-derived porous carbon matrix, pores with multiple pore sizes, the volume of the pores is 0.7-1.7 cm 2 / g; and nickel-cobalt layered double hydroxide nanosheets vertically anchored on the surface of the biomass-derived porous carbon matrix; the specific surface area of the composite electrode material is 900-1400 m 2 / g. The biomass-based composite electrode material of the application significantly improves the ion adsorption and charge storage capacity. In addition, the electrode material is applied in a capacitor, which effectively improves the energy density, electrode conductivity and cycle stability of the supercapacitor.

The application provides a method for high-selectivity adsorption of extremely low concentration NH3 by using alcohol amine ionic liquid microporous materials, and belongs to the technical field of gas separation and purification. In the method, the ionic liquid microporous material uses a mesoporous material as a carrier, and is modified by a multi-site alcohol amine ionic liquid to form a novel ionic adsorption material with selective adsorption NH3 sites and microporous structure. Since the proton hydrogen on the cation of the alcohol amine ionic liquid can form a hydrogen bond with NH3, and the material has a micropore effect, the material can efficiently capture NH3, especially has high selectivity at extremely low NH3 concentration, and the adsorbed NH3 can be completely desorbed by heating or reducing pressure, and the adsorbent has good circulation after regeneration, and still has a high adsorption capacity after ten cycles, thereby providing a new way for efficient purification and separation of NH3.

The present application relates to a method for ion type rare earth ore leaching by organic acid reinforced coupling ion exchange, which comprises the following steps: mixing leaching agent with ion type rare earth ore for leaching, obtaining leaching solution and leaching residue after leaching reaction, and recycling the leaching solution as leaching agent; ion exchanging the obtained leaching residue with salt solution, and obtaining exchange solution and exchange residue after solid-liquid separation; the leaching agent is organic acid solution. The method solves the problem that traditional inorganic salt leaching agent can only exchange and leach rare earth elements in ion phase, and has poor leaching effect on rare earth in other states (colloid phase, mineral phase), the method adopts organic acid reinforced leaching ion type rare earth ore-salt solution ion exchange combination technology, realizes efficient and green in-situ leaching of ion phase, colloid phase and mineral phase of ion adsorption type rare earth ore, and improves the ion leaching efficiency of rare earth and the utilization rate of rare earth resources.

The invention belongs to the technical field of textile dyeing, and particularly relates to an edible plant dyeing method based on ion modified cotton yarn, cation modified cotton yarn serves as a base material, stable fixation of edible plant pigment is achieved through electrostatic adsorption of cation groups and anion pigment, and the method specifically comprises the following steps that S1, the base material is prepared, the method comprises the following steps: weaving a base material by using pure cotton yarns modified by 2, 3-epoxypropyltrimethylammonium chloride, and modifying by immersing 20S-60S pure cotton yarns in a 8%-12% GTA solution according to a bath ratio of 1: 20-1: 30, soaking for 40-60 minutes at a constant temperature of 45-55 DEG C, pre-drying for 15-20 minutes at 80-90 DEG C, and then baking for 2-3 minutes at 120-130 DEG C, so that the zeta potential of the surface of the cotton yarns reaches + 15 mV to + 30 mV; the gram weight of the base material is 450 g / m, the warp density is 80-120 pieces per inch, the weft density is 60-100 pieces per inch, the breaking strength is larger than or equal to 180 N, the elongation at break is larger than or equal to 15%, and no obvious defects exist on the surface. According to the method, stable color fixation is achieved through the ion adsorption effect of the cation modified cotton yarn and the edible plant pigment, tatting jacquard is adopted, chemical color fixing agents and mordants are not needed in the whole process, and the method has safety and excellent dyeing performance.

The invention discloses a microgel material as well as a preparation method and application thereof. The microgel material comprises a polymer and cellulose nanocrystal particles, the cellulose nanocrystal particles coat at least part of the surface of the polymer; the polymer and / or the cellulose nanocrystal particles respectively and independently have metal ion adsorption functional groups and temperature responsiveness. A polymer with functional functional groups is coupled with cellulose nanocrystal particles to construct a microgel material with a core-shell structure, and fine regulation and reversible circulation of adsorption-desorption of metal ions can be realized by utilizing stimulation responsiveness of the functional groups on the surface of the core-shell structure to adsorption and desorption of the metal ions; moreover, the cellulose nanocrystal particles are excellent in dispersity, aggregation and sedimentation of the microgel material in a solution can be avoided, the ion adsorption and desorption functions of the microgel material can be regulated and controlled through the change of the environment temperature, and metal ions in the solution are recycled.

The utility model discloses a renewable waterway system and a water purifier, the renewable waterway system comprises: a pipeline system, the pipeline system is provided with a water storage tank and at least two electrodialysis filter elements with an ion adsorption function, raw water can be produced by any electrodialysis filter element and then is discharged, and a part of pure water can be distributed to flow into the water storage tank for storage; under the working condition of electrodialysis filter element regeneration, in the early stage of regeneration, raw water reversely flows through the electrodialysis filter element to be regenerated and wastewater is discharged, and in the later stage of regeneration, pure water stored in the water storage tank reversely flows through the electrodialysis filter element to be regenerated so as to wash the electrodialysis filter element; the at least two electrodialysis filter elements are arranged in a gradient manner according to the water production quantity difference value A, and when any electrodialysis filter element is regenerated, at least one electrodialysis filter element produces water to discharge water. The regeneration of the electrodialysis filter element can be realized, and the real-time water supply of the water purifier can be ensured, so that the water demand of a user is ensured.

The application discloses a method for determining a silicate cement hydration performance index, comprising the following steps: 1) respectively establishing mathematical relational expressions of mineral phase dissolution, hydration product deposition, ion adsorption reaction rate and ion concentration; 2) establishing chemical field control equations of mineral phase dissolution, product deposition, ion diffusion and ion adsorption reaction coupling in the hydration process, and potential field and temperature field control equations; combining corresponding boundary and initial conditions, solving the three groups of control equations, and outputting the results of ion concentration, potential and temperature changes with time and spatial distribution in the whole hydration process; and 3) establishing a hydration heat calculation formula of the whole hydration process of the silicate cement. The application further discloses an analysis device. The method is more in line with the real situation of the silicate cement hydration, more accurately describes the cement hydration process from the essential mechanism, can completely, accurately and truly reflect the silicate cement hydration process, and has important research and popularization significance.

The present application relates to a kind of electrolysis method of chlorine ion-containing water, electrolytic device and layered electrode.The electrolysis method of chlorine ion-containing water of the present application includes the following steps: make chlorine ion-containing water contact with chlorine ion selective barrier material, obtain treated water, then make the treated water contact with electrode, to occur the decomposition reaction of water and obtain oxygen and hydrogen, while obtaining undecomposed water, wherein by selecting the chlorine ion selective barrier material, to meet at least one condition defined in the specification.The present application improves the reaction efficiency while inhibiting the adsorption of chlorine ions by using selective chlorine ion selective barrier material, the operation method is simple and easy to realize large-scale production, so it has significant production advantages.

The invention discloses a recyclable chlorine and fluorine ion adsorption material as well as a preparation method and application thereof. The recyclable chlorine and fluorine ion adsorption material is a multi-level adsorption material of silica gel, zeolite, Arabic gum and strontium ferrite wrapped by alkali-washed fly ash. An adsorption layer in the adsorption material is alkali-washed fly ash loaded on silica gel, the silica gel and zeolite are used as protective layers during adsorption, and the silica gel, zeolite and Arabic gum can effectively protect the magnetic component strontium ferrite in the adsorption material. The adsorption material is high in adsorption efficiency, long in service life, reusable, good in stability, non-toxic and convenient to recycle, has a good adsorption effect on chlorine and fluorine ions, and has a wide market application prospect.

The embodiment of the present application relates to the technical field of dissolving device, and particularly relates to a radioactive powder dissolving device for precise sampling under pressure environment, which comprises a pouring and distributing system, a dissolving system, a sampling system, a feeding system, a vacuum system, a tail gas treatment system, a filtering system and an ion adsorption system. The sampling system is used for taking out the dissolving solution in the dissolving system, and is arranged to sample the dissolving solution under pressure environment in the dissolving process, and the sampling system is arranged to be self-cleaning to avoid interference of previous sampling on next sampling. The dissolving device in the embodiment of the present application can detect the dissolving condition of the powder without affecting the dissolving process in the dissolving system, and can ensure the accuracy of the result of each sampling and ensure that the result of each sampling can fully reflect the dissolving condition of the powder in the current dissolving system.

The application discloses a kind of halloysite-based adsorbents and its preparation method and application, belong to fluoride removal agent material technical field, soluble Al 3+ Salt solution is dropped into 50~95 ℃ halloysite and alkali metal Cl ‑ In the suspension formed by salt solution, pH value is controlled to be 8~11, co-precipitation reaction, Al 3+ And Cl ‑ Form [AlCl4] ‑ Coordination, hydrolysis boehmite type alumina and load in halloysite, obtain composite product;The composite product is calcined at 400~700 ℃, and halloysite-based adsorbent is obtained.The crystal form of the alumina loaded under the condition of pH=8~11 synthesized in the application is boehmite, and it can be converted into active alumina with relatively large adsorption activity to fluoride ion by calcining at 400~700 ℃, and the active alumina is mainly loaded in the inner / outer tube of halloysite, which is a wormhole porous structure, and the loading of active alumina improves the micropore ratio of the adsorbent, thereby improving the adsorption performance.

The invention discloses a zirconium ion-loaded phase transition protein-based defluorination adsorbent and application thereof. The adsorbent is prepared based on zirconium ion-loaded phase transition protein membrane surface modification solid waste particles. According to the adsorbent, zirconium ions are loaded on a phase transformation protein film formed after phase transformation of protein is induced by a disulfide bond reducing agent, solid waste particles are subjected to surface modification treatment, and the solid waste particles are prepared into the efficient fluorine ion adsorbent, namely waste is treated with waste. The adsorbent has the advantages of being low in cost, high in universality, efficient, easy to operate, environmentally friendly, free of secondary pollution, good in biocompatibility and the like, efficient selective adsorption of fluorine ions can be achieved, the adsorbent can be repeatedly used, and industrial application and popularization are easy.

This invention discloses a high-salt-resistant polymer oil stabilizer and water control agent, its preparation method, and its application, belonging to the field of oil and gas production enhancement technology. This oil stabilizer and water control agent is prepared by low-temperature initiated copolymerization of acrylamide monomer, a salt-resistant monomer containing sulfonic acid groups, a cationic adsorbent monomer, and an acrylate-terminated Goerbert alcohol polyoxyethylene ether nonionic hydrophobic monomer. By introducing the synergistic effect of the nonionic hydrophobic monomer and the sulfonic acid monomer, the product exhibits excellent high-salt and high-hardness resistance, maintaining good stability and oil-water selectivity under high salinity and high hardness conditions. Simultaneously, the addition of β-cyclodextrin as a quick-dissolving agent significantly improves the dissolution rate, meeting the requirements for on-site online preparation. This agent is suitable for fracturing, profile control, and water-enhancing operations in low-permeability, high-salt reservoirs, offering advantages such as long-term stability, convenient application, and low cost.

The utility model relates to a water treatment system which comprises a storage box, a first pipeline, a second pipeline and a third pipeline, the first pipeline is communicated with the water outlet end of the storage box, the first pipeline is sequentially provided with a first filter, an electro-adsorption module, a heat exchanger and a hardness detector, and the electro-adsorption module is used for conducting ion adsorption on liquid output by the first filter; the heat exchanger is used for heating liquid output by the electro-adsorption module to a preset temperature, the hardness detector is used for detecting the hardness of the liquid output by the first pipeline, the second pipeline is communicated with the output end of the first pipeline and the water return end of the storage box, and the second pipeline is provided with a first communication valve used for controlling on-off of the second pipeline; the third pipeline communicates with the output end of the first pipeline and is provided with a second filter and a second communicating valve, and the second communicating valve is located between the second filter and the heat exchanger and used for controlling the third pipeline to be connected or disconnected. The water treatment system not only can efficiently carry out softening pretreatment, but also is low in resource consumption and small in environmental pollution.

The application discloses a treatment process of high-purity quartz sand acid washing wastewater and belongs to the technical field of wastewater treatment. The treatment process comprises the following steps: S1, high-purity quartz sand acid washing wastewater is discharged into raw water pool and is left standing; S2, the wastewater is pumped to a neutralization pool, lime water is added, and the pH of the wastewater in the pool is adjusted to 6.0-7.0; S3, after neutralization, the wastewater is transported to a coagulation and sedimentation pool, calcium chloride and PAC are added, coagulation stirring is carried out, standing and sedimentation are carried out, and after sedimentation, sludge is discharged to a sludge pool; S4, the supernatant of the coagulation and sedimentation is discharged to an ion adsorption pool, stirring is started, an adsorbent calcium aluminum hydrotalcite is added to the pool for adsorption, and the content of fluorine ions is determined, until the content of fluorine ions is lower than 5 mg / L, the stirring and adsorption are stopped, and the water quality reaches the standard and is discharged to a discharge pool. The method can realize stable adsorption under a low fluorine ion concentration, significantly improves the removal rate of fluorine ions, and finally obtains standard wastewater with a fluorine content of not more than 5 mg / L.

The invention relates to a solid-phase separation material for separating actinide and lanthanum and a preparation method of a main extractant of the solid-phase separation material, the solid-phase separation material is an extraction color layer material adopting an inert support to load a functional reagent, and the main extractant of the functional reagent is phenyl or phenyl derivative substituted disubstituted dithiophosphonic acid. At least one substituent group on a phosphorus atom of the phenyl or phenyl derivative substituted disubstituted dithiophosphonic acid is phenyl or a phenyl derivative. The solid-phase separation material and the main extraction agent thereof provided by the invention have excellent capability of separating trivalent actinide and lanthanide ion groups, and have good chemical stability, radiation resistance and high temperature resistance. Meanwhile, a synergistic extraction reagent is further introduced, so that the adsorption capacity of the trivalent actinide ions is further improved, the pH value of separation operation is reduced, and the difficulty of operation control is further reduced. In addition, the solid-phase separation material for separating the actinide and the lanthanum, provided by the invention, can be stored for a long time and has good reusability.

The application discloses a La-CPAN-PEI fluorine removal material and a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method of the material comprises the following steps: heat treatment of polyacrylonitrile fibers in a protective gas to obtain cyclized polyacrylonitrile fibers; dispersing the cyclized polyacrylonitrile fibers, an alkali catalyst, an organic lanthanum source and polyethyleneimine in a degassed alcohol solution, and carrying out a solvothermal reaction to obtain the La-CPAN-PEI fluorine removal material. The pH response characteristic of the PEI chain is utilized to realize accurate regulation and control of a fluorine ion adsorption process, and the process presents the characteristics of 'acid absorption and alkali desorption' and dynamic balance in an intermediate pH region. The material has high adsorption capacity, excellent selectivity and simple acid-alkali cyclic regeneration capacity through the synergistic effect of a triple mechanism of 'electrostatic attraction-conformation mass transfer-precipitation fixation', and has a good application prospect in deep treatment of fluorine-containing wastewater.