14results about How to "Increase adsorption sites" patented technology

The invention relates to the technical field of porous adsorption materials, and discloses a porous adsorption material for organic waste gas purification and a preparation method thereof. Comprising the following steps: ultrasonically dispersing modified titanium carbide MXeneC in ethylene glycol, adding a palladium acetate solution, uniformly stirring, heating to 150-155 DEG C, reacting for 2-2.5 hours, cooling to room temperature, filtering, washing with deionized water and ethanol, and performing vacuum drying at 70 DEG C for 12 hours to obtain the porous adsorption material.

The invention relates to the technical field of electronic-grade sulfuric acid, and discloses a method for preparing electronic-grade sulfuric acid. Industrial-grade liquid sulfur trioxide is subjected to gasification, demisting, dehumidification and purification to prepare ultra-pure sulfur trioxide; absorbing sulfur trioxide by using electronic-grade sulfuric acid to prepare an electronic-grade sulfuric acid crude product; the electronic-grade sulfuric acid crude product is subjected to degassing, hydrogen type macroporous cation resin modification and continuous multi-group high-efficiency membrane combined filtration to obtain electronic-grade sulfuric acid; according to the modified hydrogen type macroporous cationic resin disclosed by the invention, the surface characteristics of the resin are changed through acylation reaction, so that the modified hydrogen type macroporous cationic resin shows better selectivity and affinity in the subsequent metal ion adsorption process; the introduced multi-sulfydryl functional group provides more adsorption sites for the resin, and the sites and metal ions can form a stable complex, so that the metal ions in a solution are effectively adsorbed and removed, and metal ion impurities in electronic-grade sulfuric acid are further reduced; the purity of the prepared electronic-grade sulfuric acid is 99.9999999%, the content of metal ions is only 5 ppt, and the electronic-grade sulfuric acid can meet the quality requirement of semiconductor-grade G5 of an ultra-large integrated circuit.

The invention provides a composite solid-state electrolyte. The composite solid-state electrolyte has a multi-coating structure. The composite solid-state electrolyte comprises a solid-state electrolyte serving as a core; a lithium salt layer is compounded on the surface of the solid electrolyte; a calcium phosphate layer and a mesoporous silica shell layer are arranged on the surface of the lithium salt layer; the solid-state battery prepared from the composite solid-state electrolyte provided by the invention has high ion mobility and interface compatibility, and can give consideration to both safety performance and cycle performance.

The invention discloses a denitrification and dephosphorization agent and a preparation method thereof. First, corn stalks and a metal nitrate aqueous solution are used as raw materials to prepare metal-based biochar, and then acrylamide is polymerized in situ with the metal-based biochar as a matrix to prepare modified metal-based biochar; then acrylic acid is used to graft starch to obtain acrylic acid grafted starch, and then the acrylic acid grafted starch is reacted with ethylenediamine solution to obtain amino chelated starch, and enzymatic hydrolysis is performed to obtain porous amino chelated starch; finally, the modified metal-based biochar and the porous amino chelated starch are compounded to obtain the agent. The agent can simultaneously achieve denitrification and dephosphorization of sewage, and has very good application prospects.

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 sewage biochemical treatment, in particular to a biomass carbon source for culturing sewage treatment granular sludge and a preparation process of the biomass carbon source. Comprising the following steps: preparing cellulose template fluid; carrying out modification pretreatment on the plant biomass; and fiberizing and compounding the biomass carbon source. The cellulose template fluid is continuously sprayed into the biomass mixed oil agent through electrostatic spinning, a formed biomass carbon source can provide a good growth initial stage carrier for microorganisms, the nitrogen and phosphorus removal effect of the microorganisms is promoted, modified biomass in the biomass mixed oil agent is chelated with the cellulose template fluid through Fe < 3 + > on the surface, and the nitrogen and phosphorus removal effect of the microorganisms is improved. According to the method, a cellulose template fluid is prepared, so that a layer of compact and uniform biomass film is formed on the surface of the cellulose template fluid, a high C / N ratio can be provided in sewage, reproduction and self-flocculation of microorganisms in the sewage on a biomass carbon source are promoted, and the method has more efficient denitrification capacity in the sewage.

The present invention discloses a preparation method of a layered α-zirconium phosphate (α-ZrP) doped composite gel material and its heavy metal ion adsorption application, which relates to the field of water pollution control. The purpose of the present invention is to solve the problems of low selectivity for copper ions, low adsorption capacity, poor mechanical strength, complex production process and high cost of existing copper ion hydrogel adsorbents. Method: (1) prepare a few layers or a single layer of α-ZrP powder filler; (2) add it to a gelatinized liquid of starch and sodium carboxymethyl cellulose (CMC); (3) add the mixed solution to a cross-linking solution for cross-linking; (4) crush it with a blender, soak it in ethanol, and vacuum dry it to obtain an α-ZrP doped composite gel material for use as a copper ion adsorbent, which has good mechanical strength and stability; for heavy metal copper ion adsorption, it has the characteristics of fast, high efficiency and high adsorption capacity.

The application discloses a system and process for removing perfluorooctanoic acid by integrating coagulation sedimentation and modified activated carbon adsorption, and belongs to the technical field of water pollution treatment. The system comprises a container frame, a support frame is arranged on the upper portion of the container frame, an adjusting tank, a coagulation sedimentation tank and a modified activated carbon adsorption tank are sequentially arranged on the bottom of the container frame in the transverse direction and are communicated through pipelines, a first booster pump and an electromagnetic flowmeter are arranged on the pipeline between the adjusting tank and the coagulation sedimentation tank, a second booster pump is arranged on the pipeline between the coagulation sedimentation tank and the modified activated carbon adsorption tank, and the backwashing water outlet of the modified activated carbon adsorption tank and the water inlet of the coagulation sedimentation tank are communicated through a backwashing water return pipeline. The application adopts integrated and modular design and is provided with a closed loop return system, so that the removal rate of PFOA in wastewater can be effectively improved, and the problems of limited activated carbon adsorption capacity and difficult treatment of backwashing wastewater are solved.

This invention discloses a cubic bifunctional adsorbent material, its preparation method, and its applications. The preparation method includes the following steps: calcining a zeolite imidazole framework at a temperature above 800°C under an inert atmosphere to obtain the cubic bifunctional adsorbent material. The cubic bifunctional adsorbent material of this invention can simultaneously adsorb sulfonamide antibiotics and heavy metals. It also possesses a large specific surface area, numerous adsorption sites, abundant pore structure, large pore volume and diameter, and high adsorption capacity. It is a novel bifunctional adsorbent with excellent performance. When used to treat complex wastewater containing sulfonamide antibiotics and heavy metals, it can effectively remove these substances from the wastewater, demonstrating high practical value and promising application prospects. The preparation method of this invention also has advantages such as simple process, convenient operation, low cost, economic safety, and ease of promotion. It plays a significant role in promoting the large-scale preparation and industrial application of cubic bifunctional adsorbent materials.

The invention relates to the technical field of adsorbent modification, and discloses a modified activated carbon adsorbent and a preparation method thereof.The modified activated carbon adsorbent is obtained by putting coconut shell activated carbon, coal activated carbon, wooden activated carbon, bentonite, coal tar and modified cardanol into a high-temperature and high-pressure reactor to react. A quaternary ammonium salt group in the modified activated carbon adsorbent removes heavy metal ions in sewage through complexation, and an intermediate 1 is subjected to amidation reaction, so that the substitution degree of quaternary ammonium salt is improved, and the heavy metal ions are more effectively removed; carbonyl and nitrogen atoms in the structure of an amido bond formed by amidation are coordinated with heavy metal ions to form a stable complex, so that the heavy metal ions in the sewage are removed; the anacardol contained in the adsorbent has a long chain, so that the adsorption site of heavy metal ions in sewage is improved, and the long chains are mutually wound to form net laying and sweeping, so that the heavy metal ions are removed.

The invention relates to the technical field of soil improvement, and discloses a soil remediation agent for acidified soil improvement and a preparation method thereof, the soil remediation agent comprises the following raw materials: functionalized sodium alginate microspheres, an improving agent, an organic fertilizer, eggshell powder, straw powder and plant ash; the functionalized sodium alginate microspheres can adsorb activated heavy metal ions in the acidified soil, and are chelated with the heavy metal ions to form a chelate, so that the heavy metal ions are fixed, and the heavy metal ions are prevented from entering crops; the improving agent can play a role in soil for a long time, on one hand, the improving agent and the functional sodium alginate microspheres cooperate to adsorb heavy metal ions in the soil, on the other hand, nutrient elements can be provided, growth and development of crops are promoted, the soil structure is improved, the soil bulk density is reduced, and the problem of soil hardening is solved. Wide application prospects are realized.

The application discloses a hydrogel with a directional conical porous structure and a preparation method thereof, and belongs to the technical field of atmospheric water collection.The directional conical porous structure hydrogel with atmospheric water collection capacity is prepared by first preparing a uniform sodium alginate solution and an acid solution respectively, then pouring the sodium alginate solution into a mold, adding the acid solution, and finally obtaining the hydrogel with the directional conical porous structure through an acid-induced phase separation process.Compared with traditional hydrogels, the hydrogel obtained by the application not only has a rapid moisture absorption-desorption efficiency, but also has excellent cycle stability.In a plurality of moisture absorption-desorption cycles, the hydrogel can maintain a high moisture absorption amount, reduce moisture absorption salt loss, and prolong the service life of the material; and the preparation process of the application is simple, the cost is low, the environmental friendliness is high, and industrial production can be realized.

The invention relates to the technical field of polycrystalline silicon production, in particular to a modified clay-based material, a preparation method thereof and application of the modified clay-based material as an adsorbent. The modified clay-based material is obtained by modifying a clay-based material with modifiers as shown in a formula I, a formula II and a formula III. The catalyst has excellent adsorption performance, especially has excellent adsorption efficiency and catalytic conversion capability on methyl chlorosilane impurities, and is simple in preparation process, relatively low in cost and good in stability. Formula I # imgabs0 #, formula II # imgabs1 # and formula III # imgabs2 #

The present invention belongs to the technical field of preparation of environmental functional materials, and discloses a method for preparing a magnetic mesoporous sulfonated crescent-shaped adsorbent with a magnetic ferroferric oxide on the outer surface and a sulfonic acid functionalized concave interface by an emulsion interfacial polymerization method, and its lead ion adsorption application. The present invention first prepares amino magnetic ferroferric oxide, and then uses emulsion interfacial polymerization to prepare a crescent-shaped base material with a convex surface of carboxyl and a concave interface of polystyrene and polydivinylbenzene, and then prepares a magnetic mesoporous sulfonated crescent-shaped adsorbent by Friedel-crafts alkylation reaction, sulfonation reaction and aminocarboxyl dehydration condensation reaction. The adsorbent prepared by the present invention has uniform morphology and is easy to prepare in large quantities; at the same time, the presence of mesopores greatly improves the ability to adsorb Pb (II); secondly, magnetism is conducive to the separation and regeneration of materials, and maintains the stability of the structure in an acidic environment; finally, the sulfonic acid group has specific adsorption for Pb (II).