362 results about "Ion adsorption" patented technology

The invention discloses a steam condensation type adsorption tower device system for extracting lithium from plateau salt lake brine, and belongs to the technical field of salt lake lithium extraction processes. A condenser of a multi-effect evaporation system and a traditional adsorption tower are coupled into a whole, the optimal temperature in the salt lake brine lithium adsorption process is achieved, and the lithium ion adsorption efficiency of the adsorption tower is improved; latent heat of vaporization released by condensation of secondary steam generated in a last-effect evaporator in a multi-flow tube bundle directly heats salt lake brine for adsorption and desorption processes, so that the adsorption rate of lithium in the salt lake brine is increased, fresh water required by a subsequent desorption process can be preheated, and the energy consumption cost of lithium extraction from the salt lake is reduced; the temperatures of an adsorbent and salt lake brine at different positions in the adsorption tower are optimized by reasonably arranging the flow of the condensation heat exchange tube bundle, the temperature of the adsorbent and the salt lake brine is gradually increased from top to bottom in the adsorption tower, and the temperature in the adsorption tower is increased from top to bottom to compensate the reduction of the adsorption rate caused by the reduction of the lithium ion concentration.

The invention discloses a La < 3 + >-doped lithium manganese oxide lithium ion sieve as well as a preparation method and application thereof, and belongs to the technical field of salt lake lithium extraction. The preparation method comprises the following steps: by taking Mn2O3 and LiOH as raw materials, carrying out hydrothermal reaction to generate LiMnO2, mixing the LiMnO2 with La2O3, grinding and calcining to form a La < 3 + >-doped spinel structure precursor La-LMO, and carrying out acid pickling to prepare La-HMO. La < 3 + > replaces part of Mn < 3 + >, the average valence state of manganese is improved, meanwhile, the structural stability of the manganese is enhanced through the high bond energy of La-O bonds, the number of exposed manganese atoms is reduced, manganese solution loss caused by Mn < 3 + > disproportionation reaction in the acid treatment process is effectively inhibited, the adsorbed oxygen content and active sites are increased, and the lithium ion adsorption capacity is remarkably improved. The material has high-selectivity adsorption capacity on lithium ions in salt lake brine in a strong alkaline environment, the manganese solution loss rate is obviously lower than that of traditional HMO, the cycle life is remarkably prolonged, and the industrial application potential is remarkably improved. The preparation process of the lithium ion sieve is simple, the raw material cost is low, and the technical bottlenecks that an existing manganese-based lithium ion sieve is poor in structural stability and high in manganese solution loss are solved.

The invention discloses a mine water fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method of the fluorine removal agent comprises the following steps that aluminum salt, calcium salt, magnesium salt and ferric salt are added into water to be stirred, then a chelating agent, a hydroxy carboxylic acid compound and a dispersing agent are added, the mixture is heated to 40-60 DEG C to be stirred and dispersed, and heat preservation is conducted. The preparation method gets rid of the constraint of traditional calcium salt, introduces the chelating agent, the hydroxy carboxylic acid compound and the dispersing agent on the basis of controlling the compatibility of the materials and the synthesis reaction process, and utilizes the excellent fluorine ion adsorption performance and flocculation settling performance of the aluminum-calcium-magnesium-iron-based quaternary metal material to improve the fluorine ion adsorption performance of the aluminum-calcium-magnesium-iron-based quaternary metal material. Quaternary metals are assembled into a long-chain porous structure through chelation, the specific surface area and the pore volume are further increased, the contact area with fluorine ions in mine water is increased, and the porous structure adsorbs complexing groups to achieve the purposes of rapid coordination, strong adsorption, precise chelation, flocculating settling and efficient removal of fluoride in mine water.

The invention provides an intelligent prediction method of an ion adsorption type rare earth ore metallogenic target region based on a deep neural network, and provides a novel convolutional neural network model RCACNet fusing cross-level cavity features and attention, and the model adopts a deep residual network as a backbone network. The densely connected cavity space pyramid pooling module, the cross-level feature fusion module and the convolution block attention module embedded in the backbone network are fused, and through cooperative work of the four modules, complex challenges such as similar spectrum, variable scale and fine features of the ion adsorption type rare earth ore target can be effectively handled; therefore, high-precision segmentation is realized.

The invention relates to the technical field of artificial graphite production, and particularly discloses a preparation method of low-expansion high-capacity artificial graphite. According to the invention, the substance with the decomposition temperature of more than or equal to 1200 DEG C is selected as the additive for coking and graphitizing the residual oil, and is converted into the artificial graphite with a closed-pore structure through a specific process, and the artificial graphite is used as the lithium ion negative electrode material, so that the volume expansion in the charge-discharge process can be effectively reduced, the active lithium consumption caused by repeated rupture of an SEI membrane is remarkably reduced, and the service life of the lithium ion battery is prolonged. And the closed-pore structure can also isolate electrolyte invasion and avoid side reaction, and meanwhile, the mesoporous inner wall provides additional lithium ion adsorption and embedding sites to compensate volume density loss caused by pores, so that the overall performance of the lithium ion battery is remarkably improved. In addition, the residual oil is relatively low in cost, the production value of the residual oil is improved when the residual oil is used as a raw material for preparing the artificial graphite, the production cost of the lithium ion battery is reduced, and the method has obvious economic and market advantages.

The invention provides a sodium ion battery capacitor and a preparation method thereof. The sodium-ion battery capacitor comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, the positive pole piece comprises a composite positive pole material, and the composite positive pole material comprises a capacitive material and a layered oxide; the negative electrode plate comprises a composite negative electrode material, and the composite negative electrode material comprises hard carbon and a surface functional group modified porous carbon nanotube. The capacitive material and the layered oxide are synergistically matched to serve as the composite positive electrode material, a three-dimensional porous network structure is formed, and the synergistic effect of the double-electrode-layer capacity and the oxidation-reduction reaction can be improved; the hard carbon and the surface functional group modified porous carbon nanotube are synergistically matched to serve as the composite negative electrode material, so that the sodium ion diffusion path, the electrolyte infiltration area and the charge-discharge efficiency are favorably optimized, and the sodium ion adsorption capacity is improved. The sodium ion battery capacitor has the characteristics of high energy density, high power density, wide temperature range charging and discharging capability and the like.

The invention provides a preparation method of a negative electrode material, the negative electrode material, a negative electrode plate and a battery, and the preparation method comprises the following steps: S1, mixing biomass or a biomass derivative as a hard carbon precursor with sodium silicate, acrylamide, an initiator and a cross-linking agent in a solvent, uniformly stirring, and carrying out a free radical polymerization reaction under a photocatalytic condition to obtain a mixed solution; the first precursor is obtained; s2, the first precursor is soaked in a water-soluble calcium salt solution for a hybrid cross-linking reaction, then acidification is conducted, a second precursor is obtained, and a third precursor of a double-network cross-linked structure is obtained after drying, smashing and sieving; and S3, carbonizing the third precursor in an inert atmosphere, and cooling to obtain the hard carbon negative electrode material, at least solving the technical problems of enhancing the sodium ion adsorption capacity, improving the voltage platform capacity, further improving the electrochemical conversion efficiency and reasonably controlling the cost.

The invention relates to the technical field of modified biochar, in particular to wood vinegar modified biochar, a saline-alkali soil modifier containing the wood vinegar modified biochar and a preparation method of the wood vinegar modified biochar. The invention provides a preparation method of wood vinegar modified biochar, which comprises the following steps: cleaning and drying biochar, adding the biochar into wood vinegar, stirring at room temperature for 0.5-1 hour, adding a potassium permanganate solution, continuously stirring for 2.5-4 hours, carrying out solid-liquid separation, and collecting solids to obtain the wood vinegar modified biochar. The invention further provides the wood vinegar modified biochar, a saline-alkali soil modifier containing the wood vinegar modified biochar and a preparation method of the wood vinegar modified biochar. The saline-alkali soil improver has excellent sodium ion adsorption capacity and plant growth promoting capacity, inorganic acid, organic acid or various microbial strains do not need to be used in the preparation process, the preparation method is simple and feasible, and the saline-alkali soil improver can be widely applied to development and utilization of saline-alkali soil.

The invention relates to the technical field of waste catalyst resource utilization, in particular to a waste SCR denitration catalyst based heavy metal adsorbent and a preparation method thereof.The preparation method comprises the following steps that a waste SCR denitration catalyst is placed in a mixed solution of sulfuric acid and organic acid to be subjected to acid leaching treatment, and after filtering and drying treatment, the waste SCR denitration catalyst is obtained; catalyst powder subjected to acid leaching treatment is obtained; mixing the catalyst powder subjected to acid leaching treatment with a mineral material, adding a metal oxide, and carrying out ball milling treatment in a high-energy ball mill; and adding an organic binder into the ball-milled powder, and uniformly mixing to obtain the heavy metal adsorbent. Through the steps of chemical extraction, physical mixing, activity excitation and the like, the waste SCR denitration catalyst is converted into the composite material with the efficient heavy metal ion adsorption capacity, efficient resource utilization of the waste SCR denitration catalyst is achieved, and meanwhile a new solution is provided for water body heavy metal pollution treatment in China.

The invention belongs to the technical field of lithium ion adsorption materials, and relates to a preparation method of a multi-element co-doped lithium-aluminum layered double hydroxide and a lithium extraction adsorbent. The invention discloses a preparation method of a multi-element co-doped lithium-aluminum layered double hydroxide. The preparation method comprises the following steps: (1) dissolving an aluminum salt, a lithium salt and a low-valence metal element salt in water to obtain a precursor solution; (2) slowly adding a bio-based precipitant to adjust the pH value, and heating and stirring for reaction to obtain a precursor colloidal solution; (3) adding a modifier containing a non-metallic element X to adjust the pH value, carrying out ultrasonic dispersion, and transferring to a microwave reaction kettle to carry out a microwave reaction; the lithium-aluminum layered double hydroxide co-doped with the low-valence metal element M and the non-metal surface modification element X is obtained. According to the method, the diffusion rate and the adsorption performance of lithium ions are remarkably improved; according to the lithium extraction adsorbent disclosed by the invention, the adsorption efficiency and selectivity of lithium ions in salt lake brine with a high magnesium-lithium ratio are remarkably improved.

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 provides a chitosan composite material and a compound feed additive, and relates to the technical field of feed additives. The chitosan composite material comprises cross-linked chitosan and a porous carrier, the cross-linked chitosan is coated on the surface of the porous carrier; the porous carrier comprises a first porous carrier and a second porous carrier, the average particle size of the first porous carrier is 80-150 [mu] m, and the average particle size of the second porous carrier is 10-30 [mu] m. The chitosan composite material disclosed by the invention has relatively good heavy metal ion adsorption performance and can be used as a feed additive.

The invention relates to the technical field of saline-alkali soil improvement, and discloses a preparation method and application of a compound fertilizer. The method comprises the following steps: crushing and mixing gypsum stone with more than or equal to 85% of sulfate and fly ash with more than or equal to 25% of calcium oxide according to a ratio of 2: 1 to form an alkaline mixture with the total content of calcium and magnesium being more than or equal to 60%; the method comprises the following steps: chelating humic acid (a carboxylic acid group is greater than or equal to 40%) with a citric acid solution according to a ratio of 3: 2 to prepare an organic acid buffer solution with the pH value of 8.0-9.5; and mixing the alkaline mixture, a buffer solution and a nitrogen-phosphorus-potassium compound fertilizer (18-12-10) according to a ratio of (60-76%): (8-15%): (16-25%), adding a silica sol dispersing agent, sterilizing, fermenting, granulating and forming. The compressive strength of the obtained fertilizer particles is larger than or equal to 15 N, and when the fertilizer particles are applied in cooperation with acid irrigation water, the soil sodium ion adsorption rate can be increased by 30%-50%, the pH value is reduced by 0.5-1.5 units, and the crop yield is increased by 15%-25 The saline-alkali soil conditioner has the functions of reducing salt, regulating acid and promoting growth, and is suitable for improvement of moderate and severe saline-alkali soil.

The invention discloses a method for preparing a smoke dust filtering material by recycling waste aramid fiber fabric, and relates to the technical field of high polymer materials. When the smoke dust filtering material is prepared, waste aramid fiber fabric is cut, washed and dried, and then reacts with 3-chloropropyl isocyanate and dibutyl (allyl) phosphine in sequence to prepare modified aramid fiber; the preparation method comprises the following steps: enabling graphene oxide powder to react with 3-aminopropyltrimethoxysilane to prepare pre-modified graphene oxide, and then enabling the pre-modified graphene oxide to react with 3-aminopropyltrimethoxysilane and mercaptopropyltrimethoxysilane to prepare modified graphene oxide; the modified aramid fibers and the modified graphene oxide are mixed and then subjected to electrostatic spinning, and an aramid nanofiber membrane is prepared; and immersing the aramid nanofiber membrane into a 2, 2-dimethoxy-2-phenyl acetophenone solution, and carrying out ultraviolet radiation, so as to obtain the smoke dust filtering material. The smoke dust filtering material prepared by the invention has good filtering performance, flame retardant property, antibacterial property, mechanical property and heavy metal ion adsorption performance.

Specifically, firstly, montmorillonite (MMT) powder is stripped into a nanosheet layer by using an ultrasonic dispersion technology, a two-dimensional layered structure of the nanosheet layer forms rich nanoscale ion channels, and an efficient path is provided for ion directional migration in salinity gradient power generation; meanwhile, after the cellulose is stripped and dispersed by a DMSO solution, a uniform polymer network is formed, the uniform polymer network is used as a substrate material to improve the mechanical strength of the film, and the interfacial ion adsorption and conduction capability is optimized through hydrophilic groups. When the MMT nanosheet and the cellulose suspension are mixed, the MMT nanosheet and the cellulose suspension form an interpenetrating network structure through physical winding and electrostatic interaction, ordered stacking is achieved through vacuum filtration, and finally the composite film with both ion selectivity and structural stability is formed on the substrate. The preparation process is high in material adaptability, green and controllable in preparation process, high in competitiveness in large-scale production and practical application and beneficial to popularization.

The invention discloses a prospecting exploration method for ion adsorption type heavy rare earth ore in middle and low mountainous areas, and belongs to the technical field of geological mineral exploration. According to Y, Dy and Nb abnormity and Y-Nb combination abnormity areas such as water chemical exploration and soil chemical exploration of a working area, high-silicon, potassium-rich, alkali-rich and sphene-rich heavy rare earth secondary mineral mineralization mother rocks are preferably selected, and a favorable mineralization area of the ion adsorption type heavy rare earth ore is delineated by combining characteristic parameters that Y / Ce is greater than 0.9 and Dy / Ce is greater than 0.2; screening south and east-south-east abrupt slope (gradient of about 30 degrees) areas by utilizing a GIS spatial analysis technology, overlapping favorable mineralization areas of the ion adsorption type heavy rare earth ore, and comparing and determining an ion adsorption type heavy rare earth ore prospecting target area in a working area; whether mineralization abnormity exists in the heavy rare earth ore prospecting target area or not is verified by using a manual impact sampling drill and a rare earth ion leaching-titration qualitative analysis method; chemical samples are preliminarily collected, 15 components of ion phases are analyzed, whether heavy rare earth ore bodies exist or not is judged and evaluated, the prospecting exploration range of the ion adsorption type heavy rare earth ore is determined, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved. According to the method, the mineralization prospective area of the ion adsorption type heavy rare earth ore can be rapidly delineated in a large range, the prospecting target area is narrowed, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved.

The invention discloses a method for extracting lithium by using lithium ion battery electrode material original halide, which comprises the following steps: S01, mixing a lithium ion battery electrode material, water and a lithium removal agent according to a mass ratio of 1: (10-50): (0.1-5), reacting at 20-90 DEG C for 1-72 hours, and treating to obtain lithium-poor electrode powder I; s02, mixing the powder I, an activating agent and salt lake raw brine according to the mass ratio of 1: (0.1-15): (3-200), and reacting for 1-100 hours at the temperature of 5-80 DEG C to prepare a lithium-rich electrode material; and S03, the lithium-rich electrode material is subjected to lithium removal according to the step S01, a lithium-rich solution and a lithium-poor electrode material are obtained through separation, and the lithium-poor electrode material can be recycled in the step S02. According to the method, the ion screening characteristic of an electrode material crystal structure is creatively utilized, vacancy defects are formed through controllable lithium removal so as to enhance lithium ion adsorption kinetics, and meanwhile, a selective lithium transmission channel is constructed by means of transition metal valence regulation and control. Compared with a traditional process, efficient extraction of lithium resources is achieved. The process has the advantages of being environmentally friendly, low in cost and high in lithium adsorption efficiency, is suitable for the scene of extracting lithium from the salt lake original brine with different components, can promote directional migration and adsorption of lithium ions through the valence state regulation reaction of the electrode material, and provides an innovative technical scheme for extracting lithium from the salt lake original brine.

The present invention provides a time-varying prediction method and system for chloride ion erosion in concrete under marine exposure environments. The method includes: obtaining the parameters required for the concrete prediction model; determining a suitable time-varying diffusion coefficient model according to the exposure conditions and the parameters to obtain a reference diffusion coefficient and an aging factor; determining a suitable cumulative model of time-varying boundary conditions according to the cumulative property of the chloride ion adsorption capacity on the concrete surface under the exposure conditions with respect to the exposure time to obtain an initial surface chloride ion concentration and an empirical coefficient; solving the chloride ion transport model in the concrete to achieve the prediction of the chloride ion concentration under specified exposure environments and exposure times. The system is used to implement the above prediction method. The present invention can accurately predict the chloride ion concentration distribution in concrete under medium- and long-term chloride exposure conditions, and further predict the service life of the concrete structure.

The invention discloses a method for researching the corrosion resistance behavior of zinc alloy based on a first principle. The method comprises the following steps: firstly, retrieving a zinc primitive cell model from a material database and carrying out structure optimization; performing crystal face cutting, cell expansion and re-structure optimization to obtain a zinc plate model; then aluminum atom random replacement doping processing is carried out, and optimization is carried out to obtain a doping model; performing static self-consistent calculation to obtain surface energy, and screening out the most stable doping model; fixing two layers of atoms at the bottom of the most stable doping model, performing chloride ion adsorption calculation and structure optimization, and calculating adsorption energy to determine a most stable adsorption site; and finally, carrying out electronic structure calculation of state density and a work function, and representing the corrosion resistance of the zinc alloy. According to the method, a zinc alloy corrosion micromechanism is deeply analyzed, theoretical guidance is provided for component optimization and corrosion resistance improvement, and compared with a traditional experimental method, the research and development cost and time are remarkably reduced, the research efficiency is improved, and the method has important theoretical and practical application value.

The invention provides application of sodium citrate as a retardant in ion adsorption type rare earth ore seepage leaching, and relates to the technical field of nonferrous metal mining. The application provided by the invention comprises the following steps: in the in-situ ore leaching process of the ion adsorption type rare earth ore, injecting a sodium citrate solution as a retardant in the downward direction of a diversion hole excavated in the rare earth ore and in other areas needing closure and speed control in advance, so as to reduce the seepage rate of the ore leaching agent in the areas and realize regulation and control of the seepage direction. According to the invention, the leaching liquid can be prevented from seeping downwards through the flow guide holes so as to improve the liquid yield, the seepage extraction of a mineral leaching agent on wider areas such as a semi-weathered layer is enhanced, the mineral leaching blind area is effectively reduced, and the leaching efficiency is improved.

According to the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flowing electrode charging method, after a positive / negative flowing electrode is charged to adsorb ions, the potential difference of a system is improved by utilizing charges loaded on the surface of the positive / negative flowing electrode, so that the adsorption capacity on opposite-polarity charge ions is enhanced; meanwhile, an ultrasonic field is coupled to one side of a current collector of the flow electrode capacitive deionization device, and the collision contact frequency and the ion migration rate among active particles are improved by utilizing acoustic streaming and acoustic cavitation effects generated by ultrasound, so that the adsorption efficiency and the charge loading capacity of the flow electrode are improved. Compared with the prior art, the invention has the following beneficial effects: 1, the electric potential difference between the positive electrode and the negative electrode is increased by utilizing charges loaded on the surface of the flowing electrode, and the electric field driving force and the attraction force to anisotropic charge ions are enhanced, so that the ion adsorption efficiency is improved; and 2, the ultrasonic field is coupled with the flow electrode capacitive deionization device, so that the collision contact frequency and the ion migration rate among active particles in the flow electrode are improved, and the charge loading capacity of the flow electrode is further improved. And 3, compared with the traditional flow electrode capacitive deionization technology, the capacitive deionization seawater desalination device adopting the ultrasonic enhanced flow electrode charging method has the advantages that the average desalination rate is improved by 223.78% or above, and the charge efficiency is improved from 70% or below to 90% or above.

The invention discloses an electroplating sludge iron resource recovery method based on acid leaching-resin selective adsorption, and relates to the field of dangerous solid waste resource treatment.The electroplating sludge iron resource recovery method comprises the following steps that S1, collected electroplating sludge and sodium salt are evenly mixed, roasted, cooled, washed and filtered, and washing liquid and filter residues are obtained; s2, adding water into the filter residues obtained in the S1, uniformly mixing, then mixing with an acid solution, carrying out an acid leaching reaction, and carrying out solid-liquid separation to obtain an acid leaching solution; according to the electroplating sludge iron resource recycling method based on acid leaching-resin selective adsorption, selected specific chelating resin is large in iron ion adsorption capacity and excellent in selectivity under the low pH, competitive interference of coexisting ions such as Cu < 2 + > can be effectively overcome, and the iron recycling rate can reach 99% or above; the adsorption step is carried out under the strong acidic condition and is matched with the characteristics of the electroplating sludge pickle liquor, the pH does not need to be greatly adjusted, the process is simplified, and the cost is reduced.

The invention discloses a modified hard carbon material, a preparation method thereof and a battery, and relates to the technical field of battery negative electrode materials. The preparation method comprises the following steps: forming a hard carbon layer by taking grafted silicon dioxide as a template, coating the hard carbon layer with a soft carbon layer, coating the soft carbon layer with silicon dioxide, performing confinement carbonization, and removing the template. Wherein the grafted silicon dioxide contains hetero atoms S, and the hard carbon layer contains hetero atoms P. During preparation, a silicon dioxide template grafted with 3-mercaptopropyltriethoxysilane is prepared by a reverse micelle method, a phenolic resin precursor is coated to form the hard carbon layer, P is introduced through modification of triglycidyl phosphate, then an asphalt-based soft carbon layer is coated, and carbonization is performed to obtain the modified phenolic resin. And removing silicon dioxide to obtain the target material. According to the material, active sites and interlayer spacing are increased through precise doping of S and P, volume expansion is relieved through cooperation of soft carbon and hard carbon, ion adsorption is enhanced through oxygen groups, and the material shows high capacity and excellent cycle stability in secondary batteries such as potassium ions and the like and is suitable for the field of novel energy storage batteries.

The invention relates to the field of microorganism screening, in particular to a microorganism screening method capable of improving saline-alkali soil crop stress resistance and application thereof.The microorganism screening method comprises the following steps that S1, in saline-alkali soil with Na < + > larger than 0.6% and pH 8.5-10.0, suaeda glauca rhizosphere soil and root system tissue are collected and inoculated to 0.6 moL / L NaCl, and the saline-alkali soil is inoculated to a culture medium; in a liquid culture medium with the pH value of 8.0, through a gradient saline-alkaline stress enrichment-bifunctional bacterium collaborative screening technology and in combination with an embedding matrix and modified biochar compounded microbial screening agent, compared with the prior art, salt ion adsorption, flora survival rate improvement, root system nitrogen fixation and phosphate solubilizing bacterium standard-reaching rate improvement and crop biomass increase are synchronously realized, and the yield of the crops is increased. And moreover, the toxicity of salt ions is remarkably reduced, the soil micro-ecology is systematically optimized, and the method has a wide application prospect in marginal land agricultural development and saline-alkali soil ecological restoration.

The present application relates to a kind of sea sand chloride solidifying agent and its application method, the solidifying agent includes solidifying agent A and solidifying agent B;The solidifying agent A is proportioned according to the raw material of weight parts as follows: modified hydrotalcite 2~5 parts, ultrafine silica powder 0.05~0.2 parts, water 30~120 parts;The solidifying agent B is proportioned according to the raw material of weight parts as follows: metakaolin 1~4 parts, calcium hydroxide 0.1~0.3 parts, water 45~180 parts.The present application is attached to the surface of sea sand by modified hydrotalcite with ion adsorption effect and forms inner solid layer, can effectively absorb the chloride ion released by sea sand;While using calcium hydroxide to excite metakaolin with sheet shape and form stable outer solid layer, can effectively prevent the shedding of inner solid layer material;The generated hydrated calcium silicate and hydrated calcium aluminate gel can also absorb the chloride ion solidified from the escape of inner solid layer, further improve the chloride ion solidification effect.

The application relates to a plasma adsorption dual-action industrial wastewater degradation equipment and a method thereof, and belongs to the technical field of environmental protection. Adsorption and desorption can be synchronously carried out, production efficiency is improved, power consumption and electrode loss are greatly reduced, and treatment of high-concentration and large-flow sewage is realized. The treatment depth of the application is excellent, the oxidation potential of plasma discharge can easily reach more than 20 electron volts, the oxidation potential of fluorine, which is the highest in chemical substances, is only 3.2 electron volts, and the higher oxidation potential means better treatment effect. Normal temperature and pressure operation, low operation cost. The application is suitable for most water quality (no requirements for the PH value, salinity and ammonia nitrogen of water), and the technology has excellent universality. Traditional adsorption technology inevitably produces a large amount of solid waste, and the treatment difficulty and treatment cost are high, which has become a pain point in the industry. The application avoids the generation of solid waste while improving the degradation efficiency of organic matters and reducing energy consumption.

The invention discloses a lithium manganate conductive material and a preparation method thereof, and the lithium manganate conductive material comprises a lithium manganate inner net layer which is a nano network layer formed by connecting lithium manganate crystal grains; the graphene and / or carbon nanotube conductive carbon outer net layer is deposited on the surface of the inner net layer. The lithium manganate crystal grains are uniform and fine, and the crystal grains are of a continuous net-shaped arrangement structure. Dissolving and mixing the polymer nanofiber, manganese salt, lithium salt and M-doped salt to form gel, drying, and carrying out two-stage programmed heating calcination in an oxygen-containing atmosphere to obtain a lithium manganate nano inner net layer; ultrasonically dispersing the lithium manganate nano inner net layer in water, adding acidified carbon nanotubes and / or graphene oxide dispersion liquid, and depositing the acidified carbon nanotubes and / or graphene oxide dispersion liquid on the surface of the inner net layer to form a conductive carbon outer net layer. The obtained lithium manganate conductive material has a continuous large-area two-dimensional network structure, shows high conductivity, high specific capacity and excellent cycling stability, and can be widely applied to the fields of lithium ion batteries, electrochemical lithium extraction, lithium ion adsorption and the like.

The invention provides a steam explosion cotton stalk fiber ecological restoration material and a preparation method thereof, and belongs to the technical field of modified materials. Comprising the following raw materials in parts by weight: 5-10 parts of modified tailings; 47-60 parts of modified steam blasting cotton stalk fibers; the modified tailings are a material which is modified by polydopamine and a silane coupling agent and then is coated with an acrylic copolymer; the modified steam explosion cotton stalk fiber is a material prepared by mixing cotton stalk powder subjected to steam explosion with a fermented enzymolysis compound, polymerizing and modifying tannic acid, coupling humic acid, rosmarinic acid and amino cyclodextrin, and then reacting with trimellitic anhydride. According to the prepared steam explosion cotton stalk fiber ecological restoration material, a colloidal hard shell is formed on the surface layer after spray seeding, a protection blanket is formed and tightly attached to a restoration face, the wind-water erosion resistance of the material is improved, the materials can be converted into nutrients needed by plant growth, the good heavy metal ion adsorption and fixation capacity is achieved, the soil quality is effectively improved, and the ecological restoration effect is good. And the method has very important significance.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The invention provides preparation and application of a dechlorinated freund's salt precipitate, and relates to the technical field of sewage treatment. The dechlorinated freund's salt precipitate is prepared by adding CaO and NaAlO2 into a NaCl solution, stirring, mixing and reacting at room temperature, filtering, and drying the precipitate. According to the method, the defects in the prior art are overcome, the prepared dechlorination freund's salt precipitate can achieve a good heavy metal ion adsorption effect with a small dosage under the weak alkaline condition, and the purification effect on coking circulating water is comprehensively improved.