52results about How to "Well-developed microporous structure" patented technology

The invention discloses a method for manufacturing high-strength viscose-based active carbon fiber fabrics. In the method, viscose fiber fabrics woven by using long viscose fibers as a precursor are used as raw materials; according to the composition and structural characteristics of the viscose fiber fabrics, a phosphorus-free chemical reagent is used as a fire retardant and graphitizer which can improve the mechanical strength of the active carbon fiber fabric is added, and thus the high-strength viscose-based active carbon fiber fabrics with a developed microporous structure are manufactured by continuous low-and high-temperature carbonization, activation, drawing and other processes. In the invention, the production process, which is simple and easy to control, allows for continuous production and can be optimized according to actual application requirements, is adopted to manufacture the high-strength viscose-based active carbon fiber fabric products of different specifications. The method can be widely used for manufacturing products including protective products, such as fireproof, antitoxin and antichemical products, decorative products and the like.

The invention discloses a processing technology for natural biological calcium carbonate miropowder filling material. The processing technology comprises the steps that pretreatments of water washing, drying and coarse grinding are performed to the natural biological material, then the pretreated material is crushed and graded, to obtain natural biological calcium carbonate filling material which is smaller than 38 micrometers, the crushed and graded natural biological calcium carbonate filling material is baked for 0.01 to 24 hours at 100 to 900 DEG C in a high-temperature furnace, and the natural biological calcium carbonate miropowder filling material is obtained through air oxidation. The invention has the characteristics that the processing technology can maintain an aragonite crystal form in natural shells to the largest extent, and can main the heterogeneity and the strong polarity of the microcrystalline surface of the natural shells to the largest extent, so that the shell miropowder has a superior micropore structure; the filling material can obviously improve the mechanical property and the hot property of high molecular material, and simultaneously the pollution problem caused by shells and egg shells to the environment is also solved.

The invention relates to a supported carbon material catalyst for preparing C5 and C6 alkane through sugar alcohol selective hydrodeoxygenation. One of active carbon, graphene and a carbon nanotube is taken as a catalyst carrier and Ru is taken as active metal; and a first additive or a second additive is added, wherein the first additive is selected from one or two of Mo, Re and W oxides, the second additive is phosphorus, Ru accounts for 1-5wt% of the carrier, and phosphorus accounts for 2-20wt% of the carrier. According to the catalyst, the active carbon, the graphene or the carbon nanotube is taken as the carrier and a metal active center and the additive are introduced by step with an impregnation method after acidification treatment. The catalyst is used for sugar alcohol aqueous phase hydrodeoxygenation and has very good reaction activity and stability; and the sugar alcohol conversion rate is 100% and the C5 and C6 alkane selectivity reaches up to 80%.

The invention relates to a carbon-based electrode material having super high specific capacitance and a combined electrode material thereof. Capacitance of the carbon-based electrode material comprises two parts, including double-electric-layer capacitance and Faradaic pseudo capacitance, the double-electric-layer capacitance is 20-60% of the capacitance of the carbon-based electrode material, the specific capacitance of the carbon-based electrode material under the 1A / g current density is more than 400, the volume specific capacitance is more than 300 F / ml, the energy density of a symmetric device of a water-based electrolyte is more than 20 Wh / kg, and the volume energy density is more than 15Wh / kg.

The invention relates to a macroscopic preparation method for an in-situ nitrogen-doped porous carbon nanofiber which can be applied to a supercapacitor electrode material. The method comprises the steps of: 1) dissolving a phenol source and an aldehyde source in deionized water according to a certain proportion, adding a surfactant after dissolution, stirring the mixture uniformly, heating the mixture to obtain jelly-like hydrogel, and performing freeze-drying to obtain phenolic resin nanofiber aerogel; 2) performing carbonizing in an inert atmosphere to obtain black carbon nanofibers; 3) grinding the carbon nanofibers and an activator uniformly accord to a certain proportion, further performing carbonizing and activating to obtain porous carbon nanofibers, removing excess impurities fromthe activated carbon nanofibers by centrifugal washing and performing drying to obtain the porous carbon nanofibers. As the in-situ nitrogen-doped porous carbon nanofibers have great adsorption performance and the micro-pore gaps thereof can adsorb a large number of electrolyte ions, so that the in-situ nitrogen-doped porous carbon nanofiber has high specific capacity, excellent rate performanceand cycle stability as the supercapacitor electrode material.

The invention discloses an activation method for improving the performance of an adsorbing material in storage of natural gas. The method comprises four steps, including baking, acid treatment, alkali treatment and salt treatment, wherein hydrochloric acid, nitric acid and hydrofluoric acid are used for preparing an acid solution of which the concentration is 0.5mol / L to 2.0mol / L; sodium hydroxide, potassium hydroxide and ammonium hydroxide are used for preparing an alkaline solution of which the concentration is 0.5mol / L to 2.5mol / L; sodium chloride, potassium chloride, ammonium chloride, sodium sulfate, ammonium sulfate, sodium nitrate and ammonium nitrate are used for preparing a salt solution; the acid solution, the alkaline solution and the salt solution are respectively used for activating the adsorbing material which is baked at the temperature of 300-890 DEG C. The method disclosed by the invention can be used for producing a high-efficiency natural gas adsorbing material which is high in specific surface area, high in natural gas storage capacity, good in adsorption and desorption performance and long in service life.

The invention relates to an ecological floating island phosphorous removal composite medium and a preparation method thereof. The preparation method comprises the following specific preparation processes: S1, respectively carrying out drying pretreatment on aluminum sludge, steel slag and a coconut shell fiber, grinding into powder, and mixing so as to obtain aluminum sludge powder, steel slag powder and coconut shell fiber powder; S2, weighing the following components made in the step S1 in percentage by weight: 40-50% of the aluminum sludge powder, 20-30% of the steel slag powder, 10-20% ofthe coconut shell fiber powder, 5-10% of an adhesive and 5-10% of starch for later use; S3, mixing the aluminum sludge powder, the steel slag powder and the coconut shell fiber powder weighed in the step S2 so as to obtain first mixed powder; S4, sufficiently stirring the adhesive and the starch weighed in the step S2 with the first mixed powder made in the step S3, adding water, carrying out pelletizing and medium / high temperature thermal treatment, and cooling, thereby obtaining ecological floating island phosphorous removal composite medium granules. The ecological floating island phosphorous removal composite medium has the advantages of being low in cost, good in phosphorous removal effect, effective in waste resource recycling, and good in pore structure.

The invention discloses a straw biochar-based soil phosphorus active conditioner and a preparation method thereof, and belongs to the technical field of agriculture. The straw biochar-based soil phosphorus active conditioner comprises, in parts by weight, acid-modified straw biochar 40-60 parts, an chelating agent 10-15 parts, a phosphorus-releasing bacteria agent 5-10 parts, an acidifying agent 10-15 parts and a filler 5-10 parts. The conditioner controls the adsorption-desorption performance of straw biochar on phosphorus at an appropriate level to meet the demand of crops for phosphorus, balances the fixation and activation of soil phosphorus, and prevents the risk of phosphorus leaching and releasing while meeting the needs of crops, and has good economic, environmental and ecologicalbenefits.

The invention discloses a cigarette filter tip and a production method thereof. A filter tip section comprises four layers of filtering adsorbing materials and reduces tar, solid particles and other harmful gases generated during smoking by a step-by-step adsorption filtration function. The production method of the cigarette filter tip can achieve combination with the existing cigarette production process, does not need to change processing equipment and has a good application prospect.

The invention discloses a method for preparing hydrophobic activated carbon by utilizing strong acid type cation exchange resin. The method comprises the steps of: carbonizing hydrogen type strong acid type cation exchange resin under the nitrogen atmosphere, wherein the temperature control is as follows: (1) the temperature is raised from room temperature to 300 DEG C at the speed of 10 DEG C per minute; (2) the temperature is kept at 300 DEG C for 30 minutes; (3) the temperature is raised from 300 to 500 DEG C at the speed of 5DEG C / minute; and (4) the temperature is kept at 500 DEG C for 60 minutes; and cooling the exchange resin to room temperature under nitrogen atmosphere to directly obtain hydrophobic activated carbon. According to the method, the activated carbon is prepared by utilizing lots of waste strong acid type cation exchange resin generated in industrial water treatment, the wastes are effectively utilized, the environment is protected, and the cost is low; and moreover, the prepared activated carbon has an advanced porous structure, is high in adsorption capacity and particularly has high hydrophobic performance, high saturated steam pressure is formed in the pores, the water vapor is difficultly condensed, and the problem that the VOCs (volatile organic compounds) adsorption capacity is reduced because the water vapor is condensed in the pores to block the pores is effectively solved.

The invention relates to a method for lowering organochlorine content in Ginseng extract, belonging to the field of modernization of traditional Chinese medicine. The invention solves the problem that the organochlorine content in the Ginseng extract is too high. The invention is characterized in that fresh Ginseng is soaked with calcium hypochlorite aqueous solution; then using ethanol as extraction solvent to backflow and extract to obtain Ginseng extract; adding activated carbon into the Ginseng extract to carry out agitation and adsorption; then carrying out natural precipitation, using an activated carbon filtering machine to filter the precipitated supernatant liquid to obtain the Ginseng extract having gone through the stripping process. The invention has the advantages that the calcium hypochlorite is used to oxidize and degrade poisonous pesticide macromolecules into nontoxic micromolecule organic matter prone to be dissolved in water without causing secondary pollution when being used; the activated carbon is agitated to further adsorb organochlorine residue. With the adopted method of the invention, the residue is lower than the national limitation standard and content of ginsenoside in the extract is not affected. The method of the invention is used to lower the organochlorine content in the Ginseng extract.

The invention provides a method for preparing a high surface-activity adsorbing carbon material through a catalysis and activation synchronous process, which can markedly reduce environmental pollution, can lower the production cost of the adsorbing carbon material, and is easy for industrialization. The method comprises the following steps of: firstly, pulverizing petroleum coke or a wooden husk, carbonizing, then mixing with an alkali medium activator, preactivating, then activating at different temperature segments of a high-temperature activation furnace, and controlling the specific surface area and the pore diameter distribution of the high surface-activity adsorbing carbon material by adopting a double-furnace three-segment catalysis and activation synchronous method. The method comprises the following steps of: carbonizing raw materials in the activation furnace for 2 hours at the temperature of 300-800 DEG C, then adding carbon powder and 1-5% of catalyst according to the proportion of the carbon powder and KOH of 1:1-1:2, directly mixing with the raw materials, and heating to 150-550 DEG C for carrying out preactivation reaction for 1-2 hours; then enabling the material to enter the high-temperature activation furnace, reacting for 1-2 hours at a medium temperature segment at the temperature of 650-850 DEG C, and then reacting for 1-2 hours at a high temperature segment at the temperature of 950-1050 DEG C.

The invention relates to a preparation method of activated carbon with high specific surface area. The coal-based carbon is crushed and then dried, then added to a potassium hydroxide solution with a concentration of 25-40wt%, soaked for 8-12h, and filtered; the filtered residue is placed in Heating and activating in a muffle furnace, then cooling to room temperature to obtain the activated product; acid-washing the activated product, then washing to neutrality, and finally sieving to obtain the product; the process of the present invention is simple and easy to operate, and the prepared activated carbon has high The specific surface area and developed microporous structure have excellent adsorption properties.

Relating to the technical field of fruit wine processing, the invention discloses a fruit wine filtration technology. The filtration technology includes: firstly, adding pectinase into fruit wine fortreatment, then adding protease for treatment, then adding an orange peel adsorbent, conducting standing and centrifugation, removing the precipitate, and finally filtering the upper liquor with a microporous filter membrane, thus obtaining the product. The preparation method of orange peel adsorbent includes: putting the orange peel into a retort for charring to obtain charred orange peel, addingthe charred orange peel into a sodium hydroxide solution and performing heating treatment, conducting washing and pumping filtration, then performing drying, and then conducting soaking in an orangepeel extract solution, and carrying out drying and crushing. The technology provided by the invention not only can effectively remove impurities from fruit wine, but also can reduce the loss of flavorsubstances, and maintains the unique flavor of fruit wine.

The invention provides a semicoke activated carbon adsorbent, a KOH alkali fusion preparation method thereof, and application of the semicoke activated carbon adsorbent in removal of tetracycline in water. The preparation method comprises the following steps: 1) takingraw material semicoke, washing with water, and drying; and 2) uniformly mixing KOH with the semicoke pretreated in the step 1), carrying out high-temperature carbonization under the protection of inert gas, repeatedly washing obtained semicoke activated carbon with water until the semicoke activated carbon is neutral after the carbonization is completed, and drying to obtain the semicoke activated carbon adsorbent. The semicoke activated carbon adsorbent has a remarkable adsorption effect on tetracycline in a water environment, can better replace activated carbon, reducethe environmental protection cost, and has good economic and environmental effects.

The invention discloses a method for carrying out secondary catalytic reforming on tar by using in-situ thermal-state composite semicoke made after high alkaline coal difficult to utilize industrially and biomass are pyrolyzed as a catalyst. According to the method, after being subjected to pretreatment, the biomass and the coal are uniformly mixed, the high alkaline coal is used as a provider of alkali metal ions of K, Na and the like, which play a main catalytic role, and has a mass ratio of approximately being 20 to 30 percent in a mixed sample. The well prepared mixed sample is added into a lower layer of a two-stage fixed bed pyrolysis reactor to carry out pyrolysis, so as to prepare a subsequently needed catalyst; after the pyrolysis on the lower layer is completed, the charging on an upper layer is started to carry out the pyrolysis; the in-situ thermal-state composite semicoke on the lower layer is used as a carbon bed; a tar-containing pyrolysis gas obtained through the pyrolysis on the upper layer is subjected to the secondary catalytic reforming through the carbon bed on the lower layer by utilizing a carrier gas. According to the method, the characteristics that the high alkaline coal is rich in alkaline-earth metals and the biomass is loose and porous are effectively utilized; by utilizing the preparation of composite semicoke, the shortage that the semicoke is separately pyrolyzed as the catalyst is made up; the catalytic efficiency is improved; the catalytic cost is decreased.

The invention relates to the technical field of natural gas storage and transportation, and concretely relates to composition and configuration of a microporous material used for adsorbing natural gas. The disclosed microporous material uses zeolite with high specific surface area and good micropore structure, active carbon and an alumina material with high mechanical strength, combines with a graphene carbon nano-material having a special monoatomic layer and a two dimensional plane structure, excellent physical and chemical performance can be fully used for exploiting the honeycomb ceramics microporous adsorption material used for adsorbing natural gas. The prepared honeycomb ceramics cellular material has high adsorption rate, micropore aperture is 0.5-3nm, specific surface area is 2000-3000m<2> / g, micropore volume accounts for more than 85% of total pore volume, and total pore volume is greater than 1.0mL / g.

The invention relates to a NaY compound and a preparation method thereof. The NaY compound is composed of NaY molecular sieve and expanded perlite, the NaY molecular sieve grows on the expanded perlite in an overgrowth manner, and the NaY compound has a bulk density of 0.25g / cm<3> or less, a BET specific surface area of 600m<2> / g or more and a molar ratio of SiO2 / Al2O3 of 4.0-6.0. The preparation method of the NaY compound comprises the following steps: mixing a silicon source, a crystallization directing agent, the expanded perlite, NaOH and water to obtain a reaction mixture; and crystallizing the reaction mixture at 70-120DEG C for 5-72h, filtering, washing, and drying to prepare the NaY compound. The NaY compound can be used in a cracking reaction, allows the flowing state of a catalyst to be good, heavy oil macromolecules to easily approach active sites and cracking products to be easily dispersed, can improve the heavy oil conversion rate, and allows the catalyst to have a good catalytic activity. The preparation method of the NaY compound has the advantages of cheap and easily available raw materials, low cost, no environmental pollution, and good application prospect.

The invention discloses straw biochar based pot cultivation media and system for vegetables, and belongs to the technical field of agriculture. Four layers of different media are laid from bottom to top in sequence and specifically comprise a medium layer, an organic fertilizer layer, a root promoting layer and a seedbed layer, wherein the medium layer comprises modified straw biochar, river mud and / or long-acting nitrogen fertilizer; the organic fertilizer layer comprises rotten straw, organic fertilizer and / or fine river sand; the root promoting layer comprises modified straw biochar, composite fertilizer and / or kaolin; the seedbed layer comprises peat, vermiculite and / or perlite. The raw material composition is rich, functions are matched with physiological properties of crop cultivation, the cultivation media are prepared by layers according to nutrient requirements and physiological development characteristics of crops, soil physical and chemical properties of different root layers can be controlled, nutrient preparation meets the crop growth laws, root development of the crops is facilitated, nutrient absorption of different growth and development periods is regulated scientifically, and integrated and simple management of seedling culture and cultivation is realized.

The invention relates to a method for preparing C5, C6 alkane by converting an acidic biomass-based sugar alcohol solution. The method comprises the steps of 1, conducting heat treatment on a catalyst carrier, conducting filtration, washing and drying, conducting equivalent-volume impregnation on a ruthenium trichloride solution, keeping ruthenium content to be 2-10 wt%, conducting ultrasonic treatment or stirring for 1-8 h, conducting drying at 80-150 DEG C, and then conducting roasting at 300-420 DEG C in the presence of nitrogen or argon so that the Ru / C catalyst can be obtained; 2, conducting acid treatment on a sugar alcohol solution to obtain an acidic sugar alcohol solution, and conducting acid hydrolysis on biomass materials to obtain acidic biomass hydrolysate, wherein the pH value of the acidic sugar alcohol solution and the pH value of the acidic biomass hydrolysate are 1.0-5.0; 3, adding the solutions obtained in the step 2 to a trickle bed reactor, and obtaining C5, C6 alkane after sugar alcohol in the solutions reacts with the catalyst. According to the method, the preparing process is conducted at low temperature and low pressure, energy consumption is low, the process is easy to control, and industrialized application prospects are broad.

The invention discloses a method for manufacturing high-strength viscose-based active carbon fiber fabrics. In the method, viscose fiber fabrics woven by using long viscose fibers as a precursor are used as raw materials; according to the composition and structural characteristics of the viscose fiber fabrics, a phosphorus-free chemical reagent is used as a fire retardant and graphitizer which can improve the mechanical strength of the active carbon fiber fabric is added, and thus the high-strength viscose-based active carbon fiber fabrics with a developed microporous structure are manufactured by continuous low-and high-temperature carbonization, activation, drawing and other processes. In the invention, the production process, which is simple and easy to control, allows for continuous production and can be optimized according to actual application requirements, is adopted to manufacture the high-strength viscose-based active carbon fiber fabric products of different specifications. The method can be widely used for manufacturing products including protective products, such as fireproof, antitoxin and antichemical products, decorative products and the like.

The invention discloses a sulfur carbon ball loaded precious metal catalyst and a preparation method and application thereof. The catalyst is prepared from a sulfur carbon ball and an active componentloaded on the surface of the sulfur carbon ball; elemental sulphur of the sulfur carbon ball exists on a skeleton and the surface of the sulfur carbon ball in a C-S bond form, wherein the mass ratioof the elemental sulfur to elemental carbon is 0.05-20%; the active component is platinum family metal particles, and the particle size of the platinum family metal particles is 4-10 nm; and the sulfur carbon ball loaded precious metal catalyst is spherical, and the diameter of the sulfur carbon ball loaded precious metal catalyst is 100-1000 nm. The invention provides application of the catalystto a C=N bond selective catalytic hydrogenation reduction reaction. The sulfur carbon ball is synthetized through 4,4'-thiobis-thiophenol self-polymerization in-situ sulfur doping, thus the elementalsulphur exists on the skeleton and the surface of the sulfur carbon ball in the C-S bond form, and the metal dispersity and the outer-layer electron distribution characteristic of the modulated metalparticles can be effectively improved; and the catalyst is applied to the C=N bond selective catalytic hydrogenation reaction, and represents the advantages of high conversion rate, catalytic activity, stability and reaction rate.

The invention discloses a preparation method and application of a coagulated sludge-based granular filler used for water treatment, belonging to the technical field of water treatment. The invention provides the preparation method of the coagulated sludge-based granular filler which is used for water treatment, wide in raw material source, low in cost, good in adsorption and filtration effect andstable in property. According to the invention, coagulated sludge powder from a surface water purification plant or advanced sewage treatment plant, bentonite and plant-based biomass are used as raw materials and are mixed and granulated, and then pyrolysis is performed under an anaerobic condition to prepare the granular filler. After a bioretention pond or an ecological filter pond is filled with the filler, the anti-clogging performance of the filler is superior to the anti-clogging performance of powdery coagulation sludge, the filler has a good removal effect on pollutants under differentrainfall conditions, and the physicochemical property, leaching property and pollutant adsorption efficiency of the filler meet use requirements. Besides, the granular filler prepared by using the method uses the biomass and the binder which are high in yield and low in cost, and has the advantages of being simple in process and low in cost as the granular filler conducts treatment under medium and low temperature conditions.

The invention discloses a straw biochar-based facility soil salt-reducing conditioner and a preparation method thereof, and belongs to the technical field of agriculture. The straw biochar-based facility soil salt-reducing conditioner comprises, in parts by weight, 40-60 parts of modified straw biochar, 10-15 parts of a chelating agent, 5-10 parts of a composite salt-reducing microbial agent, 10-15 parts of an acidifying agent, and 10-15 parts of a filling agent. Carbonization utilization of agricultural and forestry crop straws is beneficial to realizing resource recycling, and straws are returned to the farmland more efficiently. By adopting the straw biochar-based facility soil salt-reducing conditioner, the soil salinity can be reduced by 20-40%, a facility soil pH value is increased by 10% or more, the soil bulk density is reduced by 0.05-0.10 g / cm<3>, and the soil water retention capacity is improved by 30-50%.

The invention relates to a method for preparing an oil-containing sludge-based active carbon water treatment agent, mainly solving the problem that a method for preparing the oil-containing sludge-based active carbon water treatment agent does not exist in the prior art. The method for preparing the oil-containing sludge-based active carbon water treatment agent comprises the following steps: (1) uniformly mixing oil-containing sludge-based active carbon, inorganic polymerized aluminum chloride, lime and white alum at a certain ratio; (2) adding water into a silica gel solution to prepare a silica sol binding agent and adding the silica sol binding agent into a sample of the step (1); sufficiently mixing and putting the sample into a drying box at 60 to 100 DEG C to be subjected to air pre-oxidization; heating the cooled sample to 300 to 500 DEG C under a nitrogen gas atmosphere and roasting at a constant temperature for 1 to 3 hours; cooling to obtain the water treatment agent. With the adoption of the technical scheme, the problems can be solved better and the technical scheme can be used for preparing the water treatment agent.

The invention relates to a method for preparing an oil-containing sludge-based active carbon water treatment agent, mainly solving the problem that a method for preparing the oil-containing sludge-based active carbon water treatment agent does not exist in the prior art. The method for preparing the oil-containing sludge-based active carbon water treatment agent comprises the following steps: (1) uniformly mixing oil-containing sludge-based active carbon, inorganic polymerized aluminum chloride, lime and white alum at a certain ratio; (2) adding water into a silica gel solution to prepare a silica sol binding agent and adding the silica sol binding agent into a sample of the step (1); sufficiently mixing and putting the sample into a drying box at 60 to 100 DEG C to be subjected to air pre-oxidization; heating the cooled sample to 300 to 500 DEG C under a nitrogen gas atmosphere and roasting at a constant temperature for 1 to 3 hours; cooling to obtain the water treatment agent. With the adoption of the technical scheme, the problems can be solved better and the technical scheme can be used for preparing the water treatment agent.

The invention discloses antibacterial handmade washing soap. The soap comprises nanometer titania, negative ion antibacterial agent, molecular sieve, grease, surface active agent, sodium hydroxide andwater. The invention further provides a preparing method of the antibacterial handmade washing soap. The method includes the following steps of evenly mixing sodium hydroxide and water, adding the grease to be saponified to prepare a saponification solution, adding the surface active agent to the saponification solution to be evenly mixed, adding nanometer titania, the negative ion antibacterialagent and the molecular sieve to be evenly mixed, adding the mixture into a mold to be standing and be solidified at the room temperature, conducting demolding, and placing the soap in a ventilating and dry place to be aired to prepare the antibacterial handmade washing soap. The prepared handmade washing soap is excellent in antibacterial and decontamination effect and simple in preparation process.

The invention discloses a purifying agent for oilfield sewage treatment and a preparation method of the purifying agent, and belongs to the technical field of sewage treatment. The purifying agent isprepared from the following components in parts by weight: 22-28 parts of modified expanded graphite, 5-8 parts of cobalt nitrate hexahydrate, 12-16 parts of zinc sulfate, 5.5-9 parts of a surfactant,3-5 parts of chitosan, 2.5-5 parts of methylacryloyloxyethyl trimethyl ammonium chloride and 40-50 parts of water. According to the invention, through organic combination of all the materials, the sewage purifying agent is prepared under a synergistic effect of all the components, and the purifying agent has a large specific surface area, a large micropore volume, a developed microporous structure, high capability of adsorbing impurities such as heavy metal ions and suspended matter, and remarkable oil removal and decontamination effects. The removal rate of chemical oxygen demand (COD) is larger than or equal to 96.6%, the removal rate of suspended solids is larger than or equal to 97.2%, the oil removal rate is larger than or equal to 98%, and the removal rate of the heavy metal ions islarger than or equal to 94.7%. Purified water is clear and transparent, and requirements for purification treatment of the oilfield sewage are met.

The invention discloses a method for preparing a nitrogen-doped low-temperature carbon nanofiber electrode material for a supercapacitor. Firstly, the low-temperature carbon nanofiber (CNF) is prepared by CVD, and then the surface is activated at high temperature, and then nitrogen-containing organic matter is used to prepare the carbon nanofiber (CNF) at high temperature. Nitrogen doping and acidification treatment are carried out to obtain the electrode material. The low-temperature carbon nanofibers in the electrode material have developed micropores and mesoporous structures, can absorb a large amount of electrolyte ions, and have high specific capacity, and the nitrogen-containing functional groups doped on the surface of the carbon fiber material can improve the wettability of the material and increase the The utilization rate of the specific surface area can also change the local charge density and improve the conductivity. The nitrogen-containing functional group can also undergo redox reactions to generate pseudocapacitance and further improve the capacitance performance. The electrode material of the invention has high specific capacity, excellent rate performance and cycle stability, simple and easy-to-operate synthesis process, no need for electrospinning, low cost and high yield, and has good application prospects in supercapacitors.