150results about How to "Good adsorption properties" patented technology

The invention provides an inorganic composite material for absorbent refining multiple metal ion industrial sewage. The inorganic composite material is prepared by mixing, by percentage by weight, 5-15% of intercalation expandable graphite, 10-25% of hydroxyapatite, 5-15% of zeolite, 5-10% of rectorite, 5-10% of chalk, 5-25% of bentonite and 15-40% of kieselguhr, adding 5wt% of clear water of total mass of mixture and 5wt% of sodium carboxymethylcellulose, evenly mixing to prepare spheroidal particle with the grain size of 1-3mm, and roasting for 2h at the temperature of 200-800 DEG C after drying. The inorganic composite material is apt to obtain technique materials and simple in handling process, and is used for absorbent refining of the multiple metal ion industrial sewage.

The invention discloses a large-scale adsorbing material ZIF-8 synthesizing and forming methods, and belongs to the technical field of adsorbing materials. The method comprises the steps of: pouring 70-75ml of dimethyl formamide (DMF) into a polytetrafluoroethylene liner with the volume of 100ml, and adding Zn(NO3)2.6H2O and 2-methylimidazole according to a molar ratio of 1:(2-4) to be fully dissolved; crystallizing under self-generated pressure; heating from a room temperature to a preset crystallization temperature through programs, and then preserving a constant temperature for a plurality of hours; cooling, filtering in vacuum and washing; weighing and putting ZIF-8 powder into a mortar, and adding an adhesion agent to be completely ground together; then adding a peptizing agent, and completely grinding the peptizing agent in the mortar until wet fine powder is formed; and tabletting the obtained wet fine powder through a tabletting machine so as to obtain a platy ZIF-8 mateiral. The ZIF-8 synthesized by the method has high crystallinity and good adsorption property.

The invention provides a fireflooding channeling sealing agent and its preparation method. Raw materials for preparing the fireflooding channeling sealing agent contain, by weight, 0.5-3% of a melamine substance, 0.2-1% of phenol, 2-8% of aldehyde, 0.5-2% of a pH regulator, 0.2-1.2% of a nano-alumina oleoresin liquid XZ-LY102, 10-20% of ultrafine silicon dioxide and the rest of water. Sealing rate of the fireflooding channeling sealing agent can reach 93%; temperature resistance reaches 300 DEG C; the highest salinity tolerance reaches 150,000 mg/L; expriation data can reach 6 months and above under the steam condition of 300 DEG C; viscosity of a profile control agent before gel forming is 150-1,500 mPa.S; sealing strength can reach 31 MPa/m; and gel forming time can be controlled within 12-36h. By the use of the fireflooding channeling sealing agent, deep profile control of an oil layer can be realized.

The invention discloses an adsorption film mixing three metallic oxides and a preparation method thereof and a method for measuring fluorinion based on a gradient diffusion thin film technology. The adsorption film takes three oxides, namely iron, aluminum and cerium as adsorption materials, and the three oxides are uniformly dispersed into a polyacrylamide solution to form a gel and the gel is heated to form an adsorption film. The adsorption film, a diffusion film and a filter membrane are overlapped to assemble a DGT device, and the DGT device is placed into water body and sediments to realize in situ testing of fluorinion and the subcentimetre high resolution detection of fluorinion distributed in the water body and sediments. The adsorption film prepared by adopting the preparation method disclosed by the invention is large in adsorption capacity, long in retention time and easily available in materials; compared with the traditional fluorinion selective electrode method, the fluorinion in situ test method based on the gradient diffusion thin film technology is wide in application range and the result has more representativeness.

The invention discloses a cadmium-contaminated farmland soil remediation method based on magnetic biochar. The method mainly comprises the following steps: irrigating soil, adding biochar accounting for 0.5-5% of the mass of the soil, performing sufficient stirring until uniformity to make the magnetic biochar and the soil form a muddy water mixture, standing the mixture, adding water, performingstirring to make the magnetic biochar float out of the water surface, and recovering the magnetic biochar enriched with free Cd and soil clay particles so as to achieve the purpose of reducing the total Cd of the soil. The free Cd and clay particles with a small particle size (smaller than or equal to 2 [mu]m) and a high Cd concentration are enriched by means of the magnetism, floatability and other properties of the magnetic biochar, so the Cd content of the soil is reduced; and the application of the magnetic biochar also has an improvement effect on soil. The magnetic biochar prepared in the invention has floating capacity, and can be magnetically recycled, and the remediation method has the advantages of simple flow, high operability, greenness and environmental friendliness, and is anenvironmentally-friendly remediation technology.

The invention discloses a method for reducing the bioavailability of soil with combined heavy metal pollution. The method comprises the following steps: subjecting the soil with combined heavy metal pollution to air drying, sieving and preservation; with agricultural and forestry residues as raw materials, preparing biochar particles, and carrying out crushing, screening, air drying or stoving, and preservation; mixing the screened dried biochar particles and the soil with combined heavy metal pollution in a weight ratio of 1: 20 to 1: 100 under stirring, adding distilled water to allow the water content of the obtained mixture to reach 50 to 70% of field moisture capacity, and subjecting the mixture to standing for 5 to 7 days to allow the mixture to be fully decomposed so as to prepare achar-soil mixture with combined heavy metal pollution; and transplanting tobacco seedlings into the char-soil mixture by using a well cellar seedling transplanting method, uniformly filling the wellcellar with the mixture and allowing the growing points of the tobacco seedlings to main exposed. The method provided by the invention substantially reduces the available contents of Cd and Pb in thesoil with combined heavy metal pollution and lower absorption and enrichment of the heavy metals Cd and Pb by the roots, stems and leaves of crops; and the method has the advantages of low cost, highefficiency, simple operation and easy promotion and application.

The invention relates to the field of textile materials, in particular to a skin-core composite fiber with a nano fiber surface and a preparation method thereof. The skin-core composite fiber with the nano fiber surface comprises a core layer and further comprises a nano fiber skin layer coating the outer surface of a core layer, wherein the nano fiber skin layer is formed by stacking nano cellosilk, and the average diameter of the nano cellosilk is 100-500 nm. The preparation method of the skin-core composite fiber with the nano fiber surface comprises the steps that 1, the skin-core composite fiber is prepared, a skin layer raw material and a core layer raw material are put in a double-component skin-core composite spinning machine for melt spinning, and the skin-core composite fiber consisting of the core layer and the skin layer is obtained; 2, the skin-core composite fiber is soaked in an acetone solution, cellulose acetate butyrate in the skin layer is extracted by utilizing acetone, and then the skin-core composite fiber with the nano fiber surface is obtained. The composite fiber has larger specific surface area and also has better mechanical property.

The invention discloses a method for preparing a carbon material by utilizing biomass waste materials and application of the carbon material prepared by the method. The method comprises the followingsteps: drying and crushing biomasses and then putting the biomasses into an acid solution for immersing; then putting the biomasses into an open hydrothermal system; putting the hydrothermal system into a muffle furnace and heating until the temperature is 180 DEG C to 250 DEG C; keeping the temperature for 5h to 8h, and reacting and filtering to obtain a carbon precursor; filtering and washing until the carbon precursor is neutral; mixing the carbon precursor with an alkaline activating agent solution with a certain concentration; putting the mixture into a magnetic stirring constant-temperature water bath pot, and stirring and heating to carry out hydrolysis reaction; after the reaction is finished, washing a product with water until the product is neutral; drying to obtain the carbon material. The surface of a carbon adsorbent contains abundant oxygen containing functional groups, such as carboxyl and hydroxyl, and the carbon adsorbent has a relatively good adsorption property to various heavy metal cations. According to the method disclosed by the invention, the biomass waste materials of agriculture and forestry are utilized, and the functionalized carbon adsorbent capable ofbeing used for managing heavy metal adsorption is prepared through a simple and rapid method; wastes are changed into valuable things and resources are sufficiently utilized; the environmental pollution is reduced, the economic benefits are good and the industrial production is facilitated.

The invention provides a phase change thermal storage material used at medium temperature in industries and a preparation method thereof. The phase change thermal storage material is prepared from adipic acid, a copper coated carbon nanotube and a binder, wherein the mass ratio of adipic acid to the copper coated carbon nanotube is (88-98):(2-12), and the mass of the binder is 3% of the total mass of adipic acid and the copper coated carbon nanotube. The preparation method of the phase change thermal storage material comprises the steps of mechanically mixing adipic acid with the copper coated carbon nanotube according to the preset ratio, filling the mixture into a crucible after mixing adipic acid with the copper coated carbon nanotube uniformly, putting the mixture into a vacuum drying oven to undergo vacuum melting and adsorption, then doping the binder and carrying out press forming, thus obtaining the phase change thermal storage material. The thermal storage material can be applied to dewatering and drying in the industries such as solar air conditioners, floor heating, chemical printing and dyeing and the like. The preparation method is reasonable in material selection and advanced in preparation process, thus the thermal storage material used in the industrial field can be produced at low cost. The thermal storage composite material substantially improves the comprehensive properties including thermal storage, heat release efficiency and the like.

The invention relates to a preparation method for a coal/polyethyleneimine crosslinked composite chelate adsorbent. The preparation method consists of three steps of ultrafine coal powder preparation, grafting reaction and crosslinking reaction and specifically comprises the steps of coupling and polymerizing coal powder through 3-aminopropyltriethoxysilane serving as a coupling agent, performing high-energy ball grinding to prepare the ultrafine coal powder, grafting polyethyleneimine (PEI) to the surface of the coal powder through chemical grafting, and performing crosslinking molding through epoxy chloropropane serving as a crosslinking agent to prepare the coal/polyethyleneimine crosslinked composite chelate adsorbent. The ultrafine coal powder is used as a base body, so that a new coal utilization way is expanded, and the cost is low; the adsorption characteristic is very excellent, and the cost-to-performance ratio is extremely high; the PEI is grafted to the surface of the coal powder and is subjected to crosslinking molding, so that the shortcoming of low intensity of the coal powder is overcome, and the chelate characteristic of the PEI is realized, so that the mechanical intensity of a finished product is improved, and heavy metal ions can be adsorbed and chelated; a treatment effect on heavy metals is enhanced.

The invention provides a method for preparing a nickel-based conductive paste. Mixed solution of sodium monophosphate reduced nickel salt water solution and chromium salt water solution is used to prepare submicron nickel-chromium mixed metal powder, and the surface of the submicron nickel-chromium mixed metal powder is clad with nano silver to prepare nickel-based metal powder. The nickel-based metal powder is taken as a conductive phase to prepare the conductive paste, antioxidant boron is added into the paste, and the oxidation-resistant temperature of the conductive paste can reach 900 DEG C; the prepared nickel-based metal powder is used for inner electrodes of multi-layer ceramics MLPTCR, and can also replace electrodes of precious metal such as silver, palladium and so on, to be used for multi-layer ceramic capacitors, special microwave ceramics and piezoelectric ceramics. The application of the nickel-based conductive paste can greatly reduce the cost of electronic elements and has better economic benefit.

Provided is an adsorbent having excellent adsorption performance in a medium-humidity range by employing an amorphous aluminum silicate formed from protoimogolite. The amorphous aluminum silicate formed from protoimogolite is synthesized by setting the Si/Al ratio in solution mixing to be of a condition that is higher than synthesizing imogolite or amorphous imogolite, and performing desalting treatment and heating thereto. The obtained amorphous aluminum silicate formed from protoimogolite yields a superior water vapor adsorption performance of 30 wt % or higher at a relative humidity of 60%, and can be used as an adsorbent for desiccant air conditioning.

The invention discloses methyl modified composite silicon dioxide aerogel with a multi-stage pore structure and a preparation method and application of the methyl modified composite silicon dioxide aerogel. Methyl triethoxysilane is added into traditional tetraethyl orthosilicate, thus methyl triethoxysilane and tetraethyl orthosilicate jointly serve as a mixed silicon source, and the composite silicon dioxide aerogel is obtained through a two-step hydrolysis method. The composite aerogel has the characteristics of high hydrophobicity, high specific surface area and high pore volume, and a composite is provided with 2 nm pores and 18 nm mesopores which jointly constitute the multi-stage pore structure of the composite. The aerogel has the excellent adsorption characteristic and the higheradsorption capacity, has a good adsorption effect on various organic matter, and has important theoretical significance and application value for development of high-performance adsorbent materials.

The invention relates to a flower-ball-shaped covalent organic framework material as well as preparation and application thereof. Tris (4-aminophenyl) amine and 1, 3, 5-tris (4-formylphenyl) benzene are used as monomers, and the covalent organic framework material with high crystallinity and a flower-ball-shaped structure formed by stacking nanosheets is prepared through a reaction at room temperature. When the flower-ball-shaped covalent organic framework material is used as a solid-phase extraction adsorbent, separation and enrichment of quinolone antibiotics can be realized, the recycling performance is good, and the use cost is greatly reduced. By combining a high performance liquid chromatography tandem mass spectrometer, a detection method for trace quinolone antibiotics in complex samples such as environmental water and food is formed, and the accuracy and reproducibility are high, and the detection limit is low.

The invention relates to a preparation method and an application method of an adsorbent for treating reactive dye wastewater. The preparation method of the adsorbent comprises the steps as follows: blast furnace water-quenched slag is taken as a raw material, the raw material is subjected to pretreatment including washing, drying, crushing, sieving and the like, then, the pretreated blast furnace water-quenched slag is added to a CTAB (cetyl trimethyl ammonium bromide) solution for oscillation, a mixed solution is filtered, a filtered material is washed and dried, and the absorbent is obtained. According to the method for removing reactive dye in wastewater by the aid of the adsorbent, the adsorbent is uniformly mixed with the reactive dye wastewater, oscillation reaction and solid-liquid separation are performed, the reactive dye is removed, and the adsorbent is separated. The preparation method and the application method have the advantages that raw materials of the adsorbent are abundant and low in cost; the preparation process of the adsorbent is convenient and feasible; the adsorption rate is high, the removal rate is high and the like. Therefore, the modified blast furnace water-quenched slag absorbent is an economical, environment-friendly and efficient adsorbent, and waste recycling and treatment of waste with waste are realized.

The invention provides a three-dimensional flower-like nano composite material as well as a preparation method and application thereof, the composite material is NiO/PDDA-RGO, and the material is prepared from PDDA-RGO and synthesized NiO by hydrothermal reaction and calcining via an ultrasonic-assisted method. Reduced graphene oxide in the composite material is used as a NiO carrier, so that theproblem of low NiO conductivity is solved, the adsorption characteristic of an analyte is improved to enhance the electrochemical performance, and the composite material is an excellent electrode modification material. The NiO/PDDA-RGO composite material is modified on the surface of an electrode to construct electrochemical sensing for enzyme-free nitrite detection. According to the method, thetechnical problems of long recognition time, complexity, high cost, low sensitivity, unobvious recognition effect and the like in the prior art are solved, high-sensitivity and high-selectivity detection for nitrite in a complex environment can be realized, and the composite material has a very good application prospect in the analysis fields of environments, foods and the like.

The invention provides high performance spherical active carbon and a preparation method and a purpose of the high performance spherical active carbon. The active carbon with a comparatively low specific surface area has physical or mechanical performances that cannot be predicted by technical staff in the field. And the spherical active carbon with a larger particle size which can not be preparedin the prior art is prepared in a good yield and at a lower cost by the preparation method.

The invention discloses a method for preparing a high-specific-surface-area nitrogen-doped carbon material from phthalimide potassium. The method comprises the following steps: carbonizing phthalimidepotassium at a high temperature, adding hydrochloric acid into an obtained carbonized product for treatment, washing a product obtained after pickling repeatedly with deionized water, and drying to obtain the nitrogen-doped porous carbon material. In-situ activation effect is achieved by using potassium element contained by the carbon material, no activating agent is needed, a developed porous structure is formed through one-step reaction, and the specific surface area of the carbon material can reach 2000 m<2>/g or above; meanwhile, nitrogen doping of the carbon material is realized by utilizing nitrogen element contained in phthalimide potassium; the prepared nitrogen-doped carbon material has a high specific surface area and high porosity, and shows a good adsorption characteristic oncarbon dioxide.

The invention relates to a method for vacuum cleaning using a hand vacuum cleaner (1). The dust is first collected in a dust collection container (9), for example a dust filter bag (3), and then disposed of. An adsorbent (7), for example activated carbon, is also provided for adsorbing odours. The invention also relates to a dust filter bag (3) or dust collection compartment (9) for a vacuum cleaner (1). The aim of the invention is to improve a method and a dust filter bag (3) or a dust collection compartment (9) of this type in terms of advantageously preventing or reducing the initial odour surge. To this end, the adsorbent (7) is introduced directly into the dust collection compartment (3, 9) and an adsorbent (7) is provided in the dust filter bag (3) or the dust collection compartment (9) in a loose form.

The invention discloses a method for improving the characteristics of marsh gas produced through anaerobic fermentation of chicken manure. The production of marsh gas is promoted through anaerobic fermentation of chicken manure by taking zeolite as an external source additive. According to the method, efficient and stable production of marsh gas by using chicken manure is realized, the method hasthe characteristics of large fermentation gas production rate, stable gas production and high content of methane in the produced gas, the problem that the system is easy to collapse, which is caused by ammonia nitrogen inhibition in the anaerobic digestion process of chicken manure, is solved, and theoretical foundation and data support are provided for energy and resource utilization of chicken manure.

The invention belongs to the technical field of functional fabrics, and particularly relates to a composite structure comprising a fabric layer and a spherical activated carbon layer and a preparationmethod thereof. The composite structure comprising the fabric layer and the spherical activated carbon layer is characterized in that the surface of the fabric layer facing spherical activated carbonis provided with a depression extending from the surface to the inside of the fabric layer; at least part of the outer surface of the spherical activated carbon is bonded to at least part of the inner surface of the depression. By adopting the composite structure, clogging of fabric and difficulty in breathing of skin caused by excessive adhesives can be avoided, and the human body comfort is improved remarkably. Moreover, the composite structure can significantly improve the bonding area of the fabric and the activated carbon, and greatly improve the washing fastness of protective clothing.Moreover, the preparation method of the composite structure and clothing is convenient, and has a broad prospect for large-scale production.