369 results about "Acidification - Treatment" patented technology

The invention discloses a method for realizing high-efficiency low-consumption micro-aerobic hydrolytic acidification of petrochemical wastewater by regulating and controlling the aeration rate in combination with a space-time diagram neural network and reinforced learning, and relates to a method for realizing high-efficiency low-consumption micro-aerobic hydrolytic acidification of petrochemical wastewater by regulating and controlling the aeration rate. The method comprises the following steps of: 1, collecting and cleaning data; 2, constructing a graph data set; 3, training the ST-GNN model; 4, constructing a deep Q reinforcement learning model; 5, the trained ST-GNN model is embedded into an automatic control system of a sewage treatment plant, and the model outputs the optimal aeration rate of the current time step and predicts the micro-aerobic hydrolytic acidification effect through interaction of the current working condition and historical data; and adjusting operation parameters of aeration equipment according to the output of the model, and carrying out hydrolytic acidification treatment. The method is high in regulation and control efficiency and low in operation error, and can be applied to the field of digital and intelligent management of sewage treatment plants.

The invention relates to the technical field of comprehensive treatment of industrial solid wastes, and particularly discloses a comprehensive utilization method of secondary aluminum ash, which specifically comprises the following steps: deoxidizing the secondary aluminum ash; carrying out hydrolysis treatment on the deoxidized secondary aluminum ash, and carrying out solid-liquid separation to obtain mixed gas, a hydrolysis slurry solid phase and high-salt-alkali ammonia nitrogen hydrolysate; separating and purifying the mixed gas to obtain hydrogen; carrying out at least two times of acid washing treatment and at least one time of alkali washing treatment on the hydrolyzed slurry solid phase to obtain a solid phase product for the concrete admixture; and carrying out ammonia-nitrogen separation on the high-salt-alkali ammonia-nitrogen hydrolysate, and carrying out gradient acidification treatment to obtain aluminum hydroxide and inorganic salt crystals. By implementing the method, high-added-value overall utilization of the secondary aluminum ash can be realized.

The invention relates to the technical field of hydrolysis and electrocatalytic oxidation, in particular to an electroanode composite hydrolysis membrane capable of synchronously performing hydrolysis on organophosphorus pollutants and electrocatalytic oxidation reaction on byproducts as well as a preparation method and application of the electroanode composite hydrolysis membrane. A composite conductive catalytic layer is loaded on a polyvinylidene fluoride membrane, and the composite conductive catalytic layer comprises acidized multi-walled carbon nanotubes and a zirconium-based metal organic framework with zirconium as a metal center. Meanwhile, by virtue of the characteristics of a height-adjustable topological structure, a relatively large specific surface area and high conductivity of carbon nano-particles of the metal organic framework, continuous operation of the electric anode composite hydrolysis catalytic membrane in a flow-type reactor is realized, so that the contact and oxidation efficiency of pollutants and a composite membrane interface is improved; and the problems of traditional mass transfer limitation and treatment of toxic by-products after pollutant hydrolysis are solved. The electroanode composite membrane can realize synchronous hydrolysis of organic phosphorus pollutants and degradation of toxic by-products.

The invention provides a modified carbon nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving polyacrylonitrile in N, N-dimethylformamide, so as to obtain an electrostatic spinning precursor solution; s2, performing electrostatic spinning treatment on the electrostatic spinning precursor solution to obtain an electrostatic spinning nanofiber material; s3, sequentially carrying out pre-oxidation and graphitization treatment on the electrostatic spinning nanofiber material to obtain unmodified carbon nanofibers; and S4, soaking the unmodified carbon nanofibers in a K2FeO4 solution, and sequentially carrying out first drying, calcination and acidification treatment to obtain the modified carbon nanofibers. The carbon nanofiber has more active sites, high specific surface area and good conductivity and hydrophilicity, can remarkably improve the energy density and cycling stability of a battery when being used for an electrode material, and can provide powerful technical support for the development of the field of new energy.

The invention discloses a method for removing thiocyanate radicals in cyanide-containing wastewater, and belongs to the technical field of metal refining. The method comprises the following steps: adding concentrated sulfuric acid to adjust the pH value of cyanogen-containing wastewater to 2-3, carrying out a stirring reaction, filtering, adding sodium hydrosulfite into a filtrate, simultaneously adding concentrated sulfuric acid to maintain the pH value to 3-5, carrying out a stirring reaction, firstly introducing a sodium sulfite acidic solution into overflowed H2S and HCN gas to absorb H2S gas, and then introducing a sodium hydroxide strong alkaline solution to absorb HCN gas. Aiming at cyanide-containing wastewater subjected to acidification treatment, firstly, a strong reducing agent sodium hydrosulfite is added to reduce SCN <-> into H2S and HCN with recycling value, then H2S is absorbed, elemental sulfur is recovered, finally HCN is absorbed, CN <-> is recovered, and the method is used for cyaniding gold extraction of a gold leaching system. The absorption and separation of H2S and HCN gas are realized, the recovery of elemental sulfur and CN <-> is further realized, and other ions are not introduced into a water supply system.

The invention discloses a solid-waste-based marine engineering cementing material, a preparation method thereof and an offshore wind power grouting material, and relates to the technical field of concrete materials, the solid-waste-based marine engineering cementing material comprises 200-400 parts of modified tailings, 50-100 parts of ceramic polishing mud, 50-100 parts of fluorgypsum, 100-150 parts of red mud, and 10-30 parts of an activator, the modified tailings are obtained by acidizing tailings powder, mixing the acidized tailings powder with carbide slag, grinding the mixture and activating the mixture at the high temperature of 600 DEG C or above, and the exciting agent comprises a stabilizing component and an exciting component. The solid waste-based cementing material is prepared by using the gold tailing powder with a huge stockpiling amount as a main material and cooperatively utilizing solid wastes such as the ceramic polishing mud, the fluorgypsum and the red mud, and the offshore wind power grouting material with excellent workability, mechanical property and durability is further prepared from the solid waste-based cementing material, the tunnel hole slag machine-made sand and various additives.

The invention provides a method for separating and purifying cryolite from electrolytic aluminum carbon residues, which comprises the following steps: sequentially performing impurity removal and crushing on the electrolytic aluminum carbon residues to obtain crushed materials of the electrolytic aluminum carbon residues, and removing carbon components in the crushed materials of the electrolytic aluminum carbon residues to obtain carbon-free waste materials of the electrolytic aluminum; the method comprises the following steps: carrying out secondary crushing on the electrolytic aluminum carbon-free waste residues to obtain crushed electrolytic aluminum carbon-free waste residues, preparing the crushed electrolytic aluminum carbon-free waste residues into slurry fluid, and diluting and blending the slurry fluid into a leaching solution; carrying out acidification treatment and solid-liquid separation treatment on the leaching solution, and extracting solid substances precipitated in the leaching solution; carrying out primary cleaning and extraction on the solid substance to obtain a cryolite extract; the cryolite extract is deeply cleaned and dried to obtain a cryolite product, and then the cryolite product is melted and solidified to obtain a cryolite refined product, so that the cryolite in the electrolytic aluminum carbon residues can be efficiently extracted and recycled with high purity, the reusability of the cryolite is improved, and the pollution of the electrolytic aluminum carbon residues to the environment is reduced.

The invention discloses a method for preparing porous carbon by using humin, and belongs to the field of carbon materials. The concentrated sulfuric acid is used for acidizing the humin under the conditions of high temperature and high pressure, so that the humin which is approximately spherical can be obtained, and the humin is pre-carbonized to form a relatively stable spherical structure. According to the invention, by controlling the temperature, on the premise of co-activation of carbon dioxide and water vapor and control of the gas flow rate, the porous carbon spheres with smooth surfaces can be obtained, and the yield can be improved at the same time. The method is simple to operate, the obtained porous carbon can well meet the preparation requirement of the silicon-carbon negative electrode, and the effect of turning waste into wealth is achieved.

The invention discloses a biomass nitrogen-doped derivative porous carbon material and a preparation method and application thereof, and belongs to the technical field of photo-thermal atmospheric water catching.The preparation method comprises the following steps that a carbon source and a nitrogen source are put into water to be subjected to an ultrasonic reaction, a reactant is subjected to hydrothermal treatment, and a solid product is obtained; carrying out steam etching and high-temperature annealing treatment on the solid product and metal salt in an inert atmosphere, and then sequentially carrying out acidizing treatment, grinding and drying to prepare the biomass nitrogen-doped derived porous carbon material. The biomass nitrogen-doped derivative porous carbon material prepared by the method has a rich pore structure and efficient adsorption-desorption performance, can replace an expensive MOFs material, optimizes the preparation path, improves the nitrogen doping efficiency and the material stability, remarkably reduces the cost and the environmental burden while ensuring the excellent atmospheric water collection performance, and has a wide application prospect. And the method shows more excellent industrialization prospects and sustainable development values.

Disclosed in the present invention are an acid-resistant noble metal ion adsorption film and a preparation method therefor. The preparation method comprises: a) pretreatment of a base film: firstly, cleaning and drying a silicon carbide substrate to obtain a clean film; then performing oxidation treatment on the clean film to obtain a micro-oxidation film; and finally, placing the micro-oxidation film in a strong acid solution for acidification treatment, to obtain a base film modified with a hydroxyl functional group; b) the growth of an MOF seed crystal: placing the obtained base film modified with the hydroxyl functional group into a seed crystal growth solution, and reacting at 110-130°C for 12-24 hours to obtain a film loaded with the MOF seed crystal; and c) MOF secondary growth: placing the prepared film loaded with the MOF seed crystal into a secondary growth solution, and reacting at 110-130°C for 20-30 hours to obtain the acid-resistant noble metal ion adsorption film. The adsorption film prepared according to the present invention has good acid resistance, and can achieve efficient and stable recovery of rare noble metals in a strong acid environment.

The invention relates to the technical field of capacitors, in particular to a porous carbon acid modification preparation method with cottonseed hulls as raw materials and application. The preparation method comprises the following steps: performing ultrasonic treatment on cottonseed hulls in a dilute acid solution, performing acidification modification on the cottonseed hulls through acidification reaction, and performing microwave pore forming to obtain porous carbon with developed pores and large specific surface area; mineral substances in pores of the porous carbon and carbon residue fragments in the pores can be removed through acid washing and water washing, so that the pore utilization rate can be remarkably increased; porous carbon containing a large number of micropores and mesopores can be formed to provide a wider charge transport channel for subsequent charging and discharging of the supercapacitor, so that the specific capacitance of the supercapacitor is improved; finally, the carbon skeleton structure of the acidized cottonseed hull is more stable, the carbon skeleton structure of the prepared porous carbon as a capacitor electrode material can still remain unchanged after multiple charging and discharging, and the cycling stability is very outstanding.

The utility model provides a hydrolytic acidification carbon source preparation device for kitchen waste wastewater. The hydrolytic acidification carbon source preparation device comprises a liquid caustic soda tank; an inlet of the kitchen wastewater storage tank is connected with an outlet of the liquid caustic soda tank; an inlet of the hydrolysis tank is respectively connected with an outlet of the kitchen wastewater storage tank and an outlet of the compound enzyme tank; the inlet of the acidification tank is connected with the outlet of the hydrolysis tank; the inlet of the carbon source storage tank is connected with the outlet of the two-phase centrifugal machine. Through hydrolytic acidification treatment of kitchen waste wastewater, kitchen waste can be effectively converted into substances rich in carbon sources, the problem of insufficient carbon sources in the sewage treatment process of a sewage treatment plant is solved, and the wastewater treatment cost is reduced.

The invention discloses a low-permeability sandstone water locking-water sensitivity synergistic plug removal deep acidizing treatment method which is suitable for a low-permeability sandstone reservoir in an offshore high-temperature and high-pressure environment (120 DEG C, 40 MPa). According to the method, acidizing fluid is adopted, and the acidizing fluid is prepared from 18%-22% of chelating type composite organic multi-element retarded acid HWCP, 1.5%-2.5% of clay stabilizer HTW, 1.5%-2.5% of waterproof locking agent HAR, 18%-22% of pressure reduction cleanup additive HWDA, 5%-7% of corrosion inhibitor HWCI and the balance filtered seawater. The acidizing fluid is prepared by stirring at normal temperature and normal pressure, and stays for 6-12 hours after being injected into a reservoir. The HWCP slowly dissolves blockages, and the acting distance reaches 11 m; the HTW anti-swelling rate is greater than or equal to 90%, and clay expansion is inhibited; the HAR prevents water blocking; secondary precipitation is reduced through HWDA; and the corrosion rate is controlled to be 15.1108 to 26.1274 g / m < 2 >. H through HWCI. According to the method, the permeability of the reservoir is recovered by 122.09%-627.1%, the yield-increasing multiple ratio is 1.60-2.91, and the high efficiency is verified through 7-well-number field application. The method is simple in process, adapts to the marine environment, and comprehensively solves the problems of water locking, water sensitivity and secondary precipitation.

The invention belongs to the technical field of organic and inorganic composite materials, particularly discloses a modification method of hollow glass beads and application of the hollow glass beads in a PU adhesive, and aims to solve the problems of poor storage stability, high viscosity change rate and the like of a composite material due to the fact that the surfaces of the hollow glass beads contain silicon hydroxyl and free alkali metal in the prior art. According to the invention, an alkyl silane coupling agent (such as methyltrimethoxysilane and n-octyltriethoxysilane) which does not contain active hydrogen is adopted to carry out surface modification on hollow glass beads. The method comprises the following specific steps: S1, acidizing microspheres with a hydrochloric acid solution to remove surface metal ions; and S2, hydrolyzing the alkylsilane coupling agent, and bonding the hydrolyzed alkylsilane coupling agent with silicon hydroxyl on the surface of the microbead. The compatibility of the obtained modified microbead and an isocyanate prepolymer is remarkably improved, the viscosity change rate is low, and the curing phenomenon is avoided. The preparation method is simple in process and low in cost, and can be widely applied to the fields of coatings, adhesives and lightweight composite materials.

The invention relates to a preparation method of a photocatalytic full-decomposition water film based on electrostatic spinning, and the preparation method comprises the following steps: S1, taking a carbon nitride precursor as a raw material, and carrying out secondary calcination to obtain an ultrathin g-C3N4 nanosheet; and carrying out electrostatic self-assembly on Co-coated BCN obtained by carrying out boron doping and cobalt compounding on the g-C3N4 and acidized Pt-coated CN obtained by carrying out platinum loading and acidizing treatment on the Co-coated BCN and the g-C3N4, so as to obtain the Co-coated BCN / Pt-coated CN photocatalyst. And S2, placing the Co-coated BCN / Pt-coated CN photocatalyst in an organic solvent, carrying out ultrasonic treatment, adding PAN, continuously carrying out ultrasonic treatment to obtain an electrostatic spinning solution, and carrying out an electrostatic spinning technology to obtain the photocatalytic full-decomposition water film. A carbon nitride precursor is used as a raw material, a carbon nitride-based photocatalyst Co (at) BCN / Pt (at) CN is obtained through modification means such as boron doping, cobalt compounding and platinum loading, the carbon nitride-based photocatalytic full-decomposition water film with high photocatalytic activity is prepared by combining an electrostatic spinning technology, and the carbon nitride-based photocatalytic full-decomposition water film can directly drive a water decomposition reaction under visible light to achieve efficient hydrogen production and oxygen production.

The invention provides a hydrolysis-acidification-precipitation integrated device, relates to the technical field of sewage treatment, and solves the technical problems of large occupied area and large investment cost of a hydrolysis-acidification treatment system in the prior art. The hydrolysis-acidification-precipitation integrated device comprises a tank body provided with an inner cavity; the water inlet device is used for conveying sewage needing to be treated to the bottom of the inner cavity of the tank body; the stirring device is used for mixing the activated sludge and the wastewater; the precipitation device is used for separating sludge and sewage, discharging residual sludge and automatically refluxing activated sludge into the hydrolytic acidification reaction area of the tank body; and the water outlet device is used for discharging the treated sewage. The functions of hydrolytic acidification, precipitation, automatic backflow and the like are integrated in one tank body, so that the requirement for an additional precipitation tank is reduced, the occupied area of the system is remarkably reduced, and the system is more suitable for the urban environment with shortage of land resources.

The invention discloses a thickening suspending agent containing modified attapulgite and application of the thickening suspending agent, and belongs to the technical field of thickening suspending agents. After acidification treatment, the content of impurities on the surface of attapulgite is reduced, the surface area and the porous property are increased, the load rate of zero-valent iron can be increased, and the utilization rate of the zero-valent iron is increased. Zero-valent iron is uniformly loaded on tubular pore channels or the surface of attapulgite in the form of nano-particles, so that the surface roughness of the composite powder is increased, stronger steric hindrance can be formed around pesticide particles, and the pesticide particles are prevented from being gathered and enlarged due to collision, so that sedimentation is reduced, and the composite powder has good suspension property and dispersity; the load of zero-valent iron can endow the thickening suspending agent with the heavy metal chelating capability; through two times of intercalation treatment, the modified zero-valent iron composite attapulgite powder can be uniformly loaded between graphene oxide layers, the graphene oxide can assist the dispersion of the attapulgite to avoid agglomeration, and the existence of the graphene oxide can improve the thermal stability of the thickening suspending agent.

The invention provides a purification method and application of a coal-based hard carbon material, belongs to the technical field of lithium / sodium ion battery negative electrode materials, and overcomes the defects that according to an existing purification method, the ash content is lower than 3%, the iron content is lower than 400 ppm, and the requirements are difficult to meet. Turning over the materials and reacting for 3.8-4.2 hours in a boiling state; acidizing: mixing an acid solution, and reacting for 2-8 hours at the temperature of 60-100 DEG C; the mixed acid solution comprises hydrochloric acid with the volume concentration of 10%-30% and hydrofluoric acid with the volume concentration of 0.5%-8%; according to the high-purity coal-based hard carbon material and the preparation method thereof, purification and deep impurity removal can be cooperated, the original coal ash content higher than 8% can be reduced to lower than 1%, and the iron content of the high-purity coal-based hard carbon material is lower than 100 ppm.

The invention discloses a biochar-loaded silicate composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing acid liquor of inorganic acid with biomass, stirring the obtained mixed liquor at 85-95 DEG C until the mixed liquor is evaporated to dryness, and preparing acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass loaded silicate composite material; and carrying out carbonization treatment on the acidified biomass loaded silicate composite material to obtain the charcoal loaded silicate composite material. According to the preparation method disclosed by the invention, the biomass is subjected to specific acidizing treatment in advance, so that the prepared biochar-loaded silicate composite material has the effects of short-term removal of cationic heavy metals and long-term soil stability, and has a good treatment effect on cationic heavy metals with different occurrence forms.

The invention relates to the field of high polymer materials, and discloses an antistatic polyether-ether-ketone composite material for semiconductor devices, the antistatic polyether-ether-ketone composite material comprises the following raw materials by weight: 60-70 parts of polyether-ether-ketone, 20-30 parts of polyetherimide, 3-5 parts of modified carbon nanotubes, 2-4 parts of nano core-shell particles, 0.5-1 part of a coupling agent, and 0.2-0.5 part of an antioxidant; the modified carbon nanotubes are obtained by acidizing carbon nanotubes and grafting imidazolyl quaternary ammonium salt on the surfaces of the acidized carbon nanotubes; according to the antistatic polyether-ether-ketone composite material, through blending of polyetherimide, the melt viscosity of a composite system can be reduced, the problems that polyether-ether-ketone is high in processing temperature and poor in flowability are solved, and the antistatic performance of the composite material is improved. Through the synergistic interaction of the added modified carbon nanotubes and nano core-shell particles, the material is endowed with excellent mechanical properties, wear resistance and antistatic properties.

The invention belongs to the technical field of fuel cell membrane electrode preparation, and particularly discloses a preparation method for improving fuel cell catalyst layer ionomer distribution, which comprises the following steps: placing a carbon nanotube in dilute nitric acid, carrying out uniform ultrasonic dispersion, then carrying out oil bath heating, carrying out continuous acidification treatment, then carrying out suction filtration, and drying to obtain a carbon nanotube catalyst layer; carbon nano tube powder subjected to acidizing treatment is obtained; mixing the acidized carbon nanotube powder with a Nafion solution in proportion, and removing a solvent through rotary evaporation to obtain a carbon nanotube-Nafion compound; mixing the carbon nanotube-Nafion compound with a commercial Pt / C catalyst, deionized water and ethanol in proportion, and performing ultrasonic treatment under an ice bath condition to obtain uniformly dispersed cathode catalyst slurry; and spraying the uniformly dispersed cathode catalyst slurry on the cathode side of the proton exchange membrane to obtain the catalyst layer for improving ionomer distribution.

A low capital and environmentally friendly process of extracting materials from slurries. The method includes adjusting a unique parameter determined based on the modified alkalinity in a quantity of the slurries to a preset value independent of the pH. Interactions of the anionic reactant species with lithium within the slurries causes a solid form of the material to precipitate out of the slurries. After the solid separation, the spent liquid may be returned to underground surface water systems or transported to a storage.

The invention discloses a method for testing the concentration of ferric ions in a citric acid cleaning solution, when the cleaning solution is combined with a color developing agent, namely a potassium thiocyanate solution, the cleaning solution is acidized in advance, firstly, citric acid is easy to form a stable complex with Fe < 3 + > at a relatively high pH value to hinder a subsequent color developing reaction and titration, and the concentration of ferric ions in the citric acid cleaning solution is not influenced; the protonated citric acid is subjected to pre-acidification treatment, so that the complexing ability of the protonated citric acid is destroyed, free Fe < 3 + > is released, hydrolysis of Fe < 3 + > is inhibited, and Fe < 3 + > is ensured to participate in subsequent reaction in an ionic state; besides, the acid environment can reduce the oxidation rate of Fe < 2 + >, avoid the introduction of additional errors due to the fact that Fe < 2 + > is oxidized into Fe < 3 + >, and improve the accuracy of a Fe < 3 + > concentration test result, so that the citric acid complexing effect is eliminated through the pre-acidification treatment, meanwhile, the oxidation interference of Fe < 2 + > is inhibited, and the detection precision is improved.

The invention discloses an acid-base neutralizer reproduced from wax gourd waste, which is prepared from the following raw materials in percentage by mass: 10% of potassium polyacrylate polymer, 10% of hydrolytic polymaleic anhydride, 15% of sesbania gum, 40% of humic acid, 25% of CMC (Carboxymethyl Cellulose) gum and the balance of acidified melon water serving as a solvent, the acidified melon water is obtained by acidifying wax gourd waste and diluting the acidified wax gourd waste by 100-300 times. The invention relates to the technical field of environmental engineering and resource recycling, in particular to an acid-base neutralizer reproduced from wax gourd waste and a preparation method thereof, and due to the adoption of the technical scheme, the acid-base neutralizer has the following advantages that the limitation of a traditional acid-base neutralizer, the application bottleneck of a natural base material and the pain point of waste recycling are solved.

The invention provides a novel red mud treatment method. The method comprises the steps that red mud is subjected to alkaline leaching to dissolve out component aluminum, then a slag phase is subjected to the procedures of drying, grinding, pelletizing and the like to obtain a pellet material, the pellet material is subjected to roasting treatment, then roasted slag is subjected to wet cooling, aluminum in the red mud enters a liquid phase, and iron and titanium are reserved in water-cooled slag; then the water-cooled slag is subjected to magnetic separation, and an iron-rich phase and a titanium-rich phase are obtained; the iron-rich phase is directly subjected to resource utilization; and the titanium-rich phase is further acidized, iron is dissolved into supernate, titanium is reserved in a solid phase, and a titanium-containing material is obtained. By means of the method, separation of aluminum, iron and titanium in the red mud can be well achieved, energy consumption and reagent consumption are effectively reduced, the resource recovery rate is increased, the requirement for environmental protection is met, and a new way is provided for efficient utilization of the red mud.

The invention discloses a high-purity and low-damage single-walled carbon nanotube purification method which comprises the following steps: carrying out mechanical shearing treatment on a single-walled carbon nanotube to disperse the single-walled carbon nanotube and open a tube bundle structure to obtain a sheared single-walled carbon nanotube; carrying out pre-oxidation on the sheared single-walled carbon nanotube in a weak oxidizing atmosphere to obtain a pre-oxidized single-walled carbon nanotube; carrying out microwave treatment on the pre-oxidized single-walled carbon nanotube or the acidified single-walled carbon nanotube in an inert atmosphere to obtain a single-walled carbon nanotube subjected to microwave treatment; and acidizing the single-walled carbon nanotube subjected to microwave treatment to obtain the acidized single-walled carbon nanotube. The method is simple in process, mild in condition, easy to amplify and suitable for industrial production. The purity of the obtained single-walled carbon nanotube is higher than 99%, the raman spectrum IG / ID ratio is larger than 150 and higher than that before purification, and the single-walled carbon nanotube is high in structural integrity and suitable for the fields of high-performance composite materials, electronic devices, energy storage and the like.

The present invention belongs to the technical field of reactors, and discloses a recovery device of a reactor and a recovery method thereof. The recovery device of the reactor comprises a reactor, a tank cover is provided on the top of the reactor, a feed port is provided on the top of the tank cover, a liquid inlet is provided on one side of the feed port, a slag outlet is provided at the middle position of the bottom of the reactor, a conveying pipe is provided on one side of the slag outlet, a servo motor is provided at the middle position of the top of the tank cover, a rotating shaft is fixedly connected to the output end of the servo motor, a stirring blade is fixedly connected to the outer surface of one end of the rotating shaft, and a rotating rod is fixedly installed at the bottom of the rotating shaft. The alkali washing liquid remaining in the waste residue after alkali washing of the waste residue is collected, so that the alkali washing liquid is circulated to the inside of the alkali washing chamber, and discharged at the same time, and then acidification is performed to prevent part of the alkali washing reaction liquid from dripping into the acidified reaction liquid and affecting the acidification effect.

This application discloses a biochar-supported silicate composite material, its preparation method, and its application. The preparation method includes the following steps: mixing an inorganic acid solution with biomass, stirring the resulting mixture at 85℃~95℃ until it evaporates to dryness, to prepare acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass-supported silicate composite material; and carbonizing the acidified biomass-supported silicate composite material to obtain the biochar-supported silicate composite material. The preparation method of this application, by pre-treating the biomass with a specific acidification process, enables the prepared biochar-supported silicate composite material to achieve both short-term removal of cationic heavy metals and long-term soil stability, and it exhibits good remediation effects on cationic heavy metals in different occurrence forms.

The invention discloses a coffee fresh fruit primary processing wastewater treatment process and a wastewater treatment system, and belongs to the technical field of wastewater treatment. The method comprises the following steps: preliminarily filtering coffee processing wastewater; feeding the preliminarily filtered wastewater into a polysaccharide reactor, adjusting the pH value to 7-9, stirring, and flocculating and precipitating to complete pretreatment; s3, carrying out regulation-hydrolytic acidification on the pretreated coffee wastewater, carrying out hydrolytic acidification on macromolecular organic substances in the wastewater, and standing for solid-liquid separation; s4, carrying out oxidation-reduction reaction on the coffee wastewater subjected to hydrolytic acidification treatment; then carrying out anaerobic reaction on the coffee wastewater subjected to the micro-electrolysis reaction to degrade organic matters, and carrying out three-phase separation on solid, liquid and gas; then carrying out an anoxic / aerobic reaction on the coffee wastewater subjected to the anaerobic reaction treatment; and then carrying out ozone / UV catalytic oxidation on the coffee wastewater after the nitrification anoxic / aerobic reaction. According to the method, microelectrolysis and biological treatment processes are combined, the acidic polysaccharide and pectin comprehensive wastewater belongs to high-difficulty wastewater, and pollutants in high-concentration coffee fresh fruit primary processing wastewater are effectively degraded.

The application provides an antimony-based composite negative electrode material and a preparation method and application thereof, and relates to the technical field of new energy batteries.The preparation method provided by the application comprises the following steps: mixing antimony metal powder with amorphous carbon, ball-milling, drying and calcining to obtain an antimony-based intermediate; performing acidification treatment on the surface of carbon nanotubes to obtain acidified carbon nanotubes, dispersing the acidified carbon nanotubes in an organic sodium modified solution, stirring, filtering, drying to obtain modified carbon nanotubes; mixing and dispersing the antimony-based intermediate, sodium polyacrylate and the modified carbon nanotubes to obtain a suspension, and then performing spray drying to obtain the antimony-based composite negative electrode material.The preparation method provided by the application can improve the problem of performance decline caused by the capacity attenuation of the antimony metal due to the huge volume expansion in the process of deintercalating sodium ions, and effectively improves the electrochemical performance of the antimony-based negative electrode material.