47 results about "Chlorohydrocarbon" patented technology

The application discloses a kind of heteropoly acid assisted ball milling modified micron zero-valent iron particles, preparation method and application.The micron zero-valent iron particles are mainly prepared by mixing micron zero-valent iron, heteropoly acid and relatively cheap noble metal compound, and the specific preparation is that micron zero-valent iron, heteropoly acid and noble metal compound are placed in a ball mill jar and a specific atmosphere to carry out ball milling modification to obtain heteropoly acid modified ultra-low ruthenium loaded micron zero-valent iron particles.The particles provided by the application have extremely strong reaction performance on chlorinated hydrocarbons, and the performance does not attenuate for more than 30 cycles, and can achieve complete dechlorination on low concentration and high concentration chlorinated hydrocarbons, which has great water treatment application value.

The invention discloses a filler for repairing chlorinated hydrocarbon pollution and a method for repairing chlorinated hydrocarbon polluted underground water by using the filler. The filler is prepared from the following components in percentage by mass: 65-85% of coarse sand, 1-10% of magnetite, 1-5% of groundwater polluted by chlorinated hydrocarbon, 1-5% of wheat bran, 1-5% of coarse gypsum, 1-5% of ferrous sulfate and 1-5% of limestone. The raw materials of the filler are industrial finished products, are low in price and are suitable for actual site repair. The method for repairing chlorohydrocarbon polluted underground water through biogeochemical conversion by using the filler does not need high temperature and high pressure, and the reaction condition is mild. The used filler and emulsified vegetable oil have the advantages of high safety and environmental friendliness, and do not cause secondary pollution to the underground environment. The generation and accumulation of incomplete dechlorination intermediate products can be obviously reduced, so that the chlorinated hydrocarbon can be completely dechlorinated.

The invention belongs to the technical field of sewage treatment, and particularly relates to a sulfur conversion driven chlorohydrocarbon polluted underground water treatment method. According to the method, the multifunctional biochar is prepared through high-temperature ammonia gas modification, PS can be activated to oxidize and remove chlorinated hydrocarbon, then sulfide reduction is catalyzed to remove residual chlorinated hydrocarbon, a porous structure of BC provides pollutant adsorption and fixation functions, and after MFBC, PS and sulfate reducing bacteria are sequentially added into a chlorinated hydrocarbon pollution medium, the pollution medium is subjected to high-temperature ammonia gas modification to remove the residual chlorinated hydrocarbon. The sulfur-containing species undergo a cyclic conversion process from PS-sulfate ion-sulfide-elemental sulfur-sulfate ion. In the conversion process, various oxidation and reduction active substances can be used for effective detoxification of chlorinated hydrocarbon, and MFBC and sulfate reducing bacteria play a key role in mediating sulfide conversion. According to the method, the chlorohydrocarbon in the high-permeability medium can be rapidly removed firstly, and then the chlorohydrocarbon slowly released by the low-permeability medium can be slowly removed at low cost. And the method is low-carbon and environment-friendly, has no secondary pollution such as heavy metals and has obvious application advantages.

The invention relates to the technical field of molecular biology and environmental biology, and discloses a PCR (Polymerase Chain Reaction) chip and a kit for detecting the expression quantity of functional genes related to microbial degradation of chlorinated hydrocarbon and application of the PCR chip and the kit. The PCR chip comprises a primer pair and a primer pair, the primer pair is used for specifically amplifying dehalogenation functional genes bvcA, cfrA, mbrA, pceA, pteA, tceA and vcrA respectively, the primer pair is used for specifically amplifying reference genes, and nucleotide sequences of the primer pair for specifically amplifying the dehalogenation functional genes are shown as SEQ ID NO. 1 to SEQ ID NO. 14. The PCR chip provided by the invention can specifically amplify seven functional genes related to the degradation of the chlorinated hydrocarbon microorganisms, is good in specificity, high in accuracy and good in repeatability, and can accurately detect the expression condition of the seven dehalogenation functional genes related to the degradation of the chlorinated hydrocarbon microorganisms through a qPCR technology, so that the existence condition of chlorinated hydrocarbon degrading bacteria can be reflected; the method has reliability in the aspects of chlorohydrocarbon polluted site biodegradability evaluation, degradation process research, repair effect verification and the like.

The application discloses a nano zero-valent iron modified hemicellulose biochar composite material and a preparation method and application thereof. The preparation method comprises the following steps: mixing xylan raw materials and iron oxide, performing ball milling treatment, and then performing a carbothermic reduction process in a microwave pyrolysis device under a nitrogen protection atmosphere and a constant temperature condition, so as to obtain the nano zero-valent iron modified hemicellulose biochar material after cooling. The composite material is prepared by using the above preparation method. The composite material is applied to purification treatment of polluted wastewater containing chlorinated hydrocarbons. The composite material has low raw material cost, simple preparation method, can form stable structure pores, has good adsorption performance and catalytic activity, realizes molecular dispersion of zero-valent iron in a hemicellulose biochar matrix, and improves adsorption and reduction capacity of the composite material on chlorinated hydrocarbon pollutants.

The present application provides a preparation method of an aromatic hydrocarbon oligomer, the preparation method including: subjecting an aromatic hydrocarbon compound to an oligomerization reaction under the catalysis of a chloroaluminate ionic liquid to obtain the aromatic hydrocarbon oligomer, where the oligomerization reaction is carried out in a solvent system, and the solvent is selected from chlorinated hydrocarbon solvents, and the aromatic hydrocarbon compound is selected from fused-ring aromatic hydrocarbons with 2 to 4 rings. The preparation method of the present application can efficiently prepare aromatic hydrocarbon oligomers with simple composition and narrow molecular weight distribution under mild conditions, thereby providing a high-quality precursor for the preparation of high-quality mesophase pitch.

The invention discloses hydrocarbon resin with low dielectric constant and high heat resistance as well as a preparation method and application thereof, and the preparation method of the hydrocarbon resin with low dielectric constant and high heat resistance comprises the following steps: S1, in an organic solvent, adding a polycyclic aromatic hydrocarbon compound and a chlorinated hydrocarbon compound for reaction; s2, adjusting the pH value of a reaction system to be neutral, and removing a water phase; s3, part of the organic solvent is removed through distillation till the set solid content is achieved, and a low-dielectric high-heat-resistance hydrocarbon resin solution is obtained after cooling. The low-dielectric high-heat-resistance hydrocarbon resin solves the problems that traditional hydrocarbon resin is insufficient in rigidity, low in strength, poor in heat resistance and low in glass transition temperature after being cured.

The invention relates to a biochar-loaded nano zero-valent iron repair material as well as a preparation method and application thereof. The biochar loaded nano zero-valent iron repair material is prepared from a persulfate-biochar carrier and metal sulfide modified composite acid stabilized nano zero-valent iron sol, the composite acid is composed of gallic acid and humic acid / fulvic acid; the preparation method comprises the following steps: S1, preparing a persulfate-biochar carrier; and S2, preparing the biochar loaded nano zero-valent iron repair material. The method is applied to groundwater chlorohydrocarbon pollution remediation. According to the method, in the reductive dechlorination process of the nano zero-valent reduced iron, released Fe < 2 + > can strengthen persulfate, Fe < 2 + > is regenerated by utilizing the reduction effect of gallic acid on reacted Fe < 3 + >, and catalytic circulation of iron is maintained; humic acid / fulvic acid is used for efficiently driving the degradation process; and metal sulfide is utilized to catalyze reduction of organic chlorine chemicals, so that the reductive dechlorination performance of the nano-iron material is improved, and the repairing effect of chlorinated hydrocarbon is optimized.

The invention belongs to the technical field of inorganic non-metallic materials, and discloses a 3D printing high-thermal-conductivity precursor converted silicon carbide ceramic and a preparation method and application thereof.The preparation method comprises the following steps that silicon carbide powder, modified B4C nano powder and polycarbosilane powder are added into excessive aromatic hydrocarbon or / and chlorinated hydrocarbon organic solvents according to the proportion, stirring is conducted, and a mixture is obtained; uniformly stirring in an inert atmosphere, putting into a planetary ball mill, carrying out ball milling, setting the rotating speed time, and uniformly mixing the raw materials to obtain slurry; after the solid content of the slurry is adjusted to a set value, a ceramic green body is prepared through 3D printing, the green body is dried and sintered, and a precursor converted silicon carbide ceramic part is prepared; the preparation method comprises the following steps: adding silane coupling agent modified nano Si powder, beta-SiC powder and phenolic resin into ethanol according to a ratio, and uniformly mixing to obtain an impregnation liquid; and carrying out vacuum impregnation on the precursor-converted silicon carbide ceramic piece in the impregnation liquid, and after impregnation is completed, carrying out curing and sintering so as to obtain the silicon carbide ceramic with high mechanical strength and good heat-conducting property.

The present application relates to the technical field of biological stimulation remediation of chlorinated organic pollutants in aquifer, and discloses a chlorinated hydrocarbon remediation material, a preparation method thereof and a method for in-situ remediation of chlorinated hydrocarbon in aquifer. The chlorinated hydrocarbon remediation material contains organic matter A, organic matter B and organic matter C, the organic matter A wraps the organic matter B and the organic matter C; the molecular weight of the organic matter A is 1000-30000, the molecular weight of the organic matter B is 200-2000, and the molecular weight of the organic matter C is 100-400. The method for preparing the chlorinated hydrocarbon remediation material comprises the following steps: S1, under the protection of inert atmosphere, first mixing the organic matter A with an organic solvent, and then second mixing the obtained first mixed solution with the organic matter B and the organic matter C; S2, drying the second mixed solution obtained in step S1. The chlorinated hydrocarbon remediation material can maintain solid-phase reduction dechlorination components for a long period of operation, and the effective slow-release period thereof can be significantly increased.

The invention discloses a simulation test system and a simulation test method for a process of phytoremediation of chlorinated hydrocarbon pollutants, the simulation test system comprises a plant experiment box, a water supply system, a monitoring assembly, a liquid recovery bottle and an imaging system, the water supply system, the plant experiment box and the liquid recovery bottle are sequentially connected in series through a hose; the imaging system consists of a lighting lamp box, a camera and a computer; the plant experiment box is used as a main body, so that the influence of plants on the distribution of pollutants in a porous medium in different growth environments can be flexibly simulated, and the change of physicochemical property parameters around a root system can be monitored in real time; by tracking the change of the distribution condition of pollutants in a two-dimensional system, the pollutant removal process of phytoremediation is studied, and the removal effect and action mechanism of different plant growth regulation and control technologies, solubilization strengthening technologies and the like on organic pollutants of plants in a simulated porous medium are verified.

The invention belongs to the technical field of paint removers, and particularly relates to a star-structure silane sealing agent, a water-based paint remover and a preparation method and application of the star-structure silane sealing agent and the water-based paint remover. According to the invention, a star-shaped structure silane sealing agent with annular polysiloxane as a core and polyol as a side arm is designed and synthesized, the star-shaped structure silane sealing agent is added into a water-based paint remover, the annular polysiloxane shields and blocks volatilization of polar components in the paint remover, and the polyol side arm is combined with the polar components through hydrogen bond acting force, so that the water-based paint remover is formed. The volatilization failure of alcohol, ester or ketone solvents in the high-temperature paint removal process is avoided, the paint can be removed at a higher temperature, and the paint removal time is shortened. The polyol on the side arm of the sealing agent also has the effect of chelating inorganic ions, so that corrosion caused by deposition of metal ions in the aluminum alloy and influence of precipitation of calcium and magnesium ions in water on the emulsification effect of the oil phase component are avoided. In addition, the water-based paint remover does not contain organic solvents such as chlorinated hydrocarbon, phenols, acetone and the like, and has no influence on the health of operators and the environment.

The application provides a method for degrading chlorohydrocarbon in water by using illite reinforced ball-milling sulfidation micro zero-valent iron, which comprises the following steps: first, a buffer solution with pH=7 is prepared by using 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid, and an oxygen-free aeration treatment is performed; then, illite and S-mZVI bm are mixed to prepare a particle mixture, and the particle mixture is sealed and stored in the buffer solution with pH=7; finally, chlorohydrocarbon pollutants are added into the particle mixture of illite and S-mZVI bm , and a sealed oscillation reaction is performed, so that the concentration of the chlorohydrocarbon in the reaction system is determined. The application directly reinforces the activity of S-mZVI bm material by using illite, which is a clay mineral widely distributed in nature, so that the defects of S-mZVI bm , such as large particle size, slow degradation rate and decreased activity in the later reaction stage, are effectively solved, and the long-term reaction activity of the particles is ensured. The raw materials are green and environmentally friendly, the process is simple, and the materials are easy to obtain.

The invention relates to the technical field of environmental remediation, and particularly discloses a method for remedying chlorinated hydrocarbon pollution, a chlorinated hydrocarbon pollution remediation agent and application, and the method comprises the steps that an injection point is arranged on a chlorinated hydrocarbon pollution site; preparing a sodium persulfate solution with the mass concentration of 7.5%-15%, and preparing a mixed solution of ferrous sulfate with the mass concentration of 1.6%-3.2% and sodium pyrophosphate with the mass concentration of 1.25%-2.5%, namely an iron pyrophosphate mixed solution; drilling is carried out according to the set injection points, drilling is carried out to the pollution depth of the chlorinated hydrocarbon pollution site, and a sodium persulfate solution is sprayed from deep to shallow; spraying a ferric pyrophosphate mixed solution in the same manner, after 7-14 days of chemical oxidation remediation, spraying 5-10 L of emulsified vegetable oil, and naturally remediating for 30-35 days. According to the method, the concentration of chlorohydrocarbon pollutants in chlorohydrocarbon polluted site soil and underground water is remarkably reduced.

The invention relates to a continuous production method of carbon tetrachloride, which comprises the following steps: mixing and vaporizing perchlorinated hydrocarbon and chlorine, and carrying out chlorination reaction at the temperature of 200-500 DEG C under the pressure of 0.6-1 MPa to obtain a crude product; performing gas-liquid separation on the crude product, returning the gas to the mixed vaporization step for recycling, and rectifying the liquid to obtain a carbon tetrachloride product; and returning other products obtained by rectification to the mixed vaporization step for recycling. In the production process, the raw materials are perchloro and chlorine, no hydrogen element participates in the production process, the required temperature and pressure conditions are relatively low, the reaction conforms to the concept of green chemistry, and the utilization rate of chlorine atoms in the whole process is 95% or above.

The invention relates to a compound surfactant, a repairing material and a method for repairing chlorinated hydrocarbon pollutants. The compound surfactant is simple in component, good in solubilizing effect, green and low in toxicity, can effectively reduce the surface tension of an aqueous solution when being dissolved in water, and has relatively high low-temperature water solubility. The repairing material has a good solubilizing effect on hydrophobic chlorinated hydrocarbon, and when the repairing material is used for repairing the chlorinated hydrocarbon pollutants, the problems that in the prior art, a surfactant is poor in solubilizing effect on the chlorinated hydrocarbon pollutants in the underground water environment, cannot be suitable for the underground low-temperature application environment, has secondary pollution and the like are effectively solved.

The invention belongs to the technical field of environmental functional materials, and particularly relates to a cobalt-nitrogen modified zero-valent iron ternary nitride material, preparation thereof and application of the cobalt-nitrogen modified zero-valent iron ternary nitride material in removal of chlorinated hydrocarbon. The invention provides a cobalt nitrogen modified zero-valent iron ternary nitride material which can be used for removing chlorinated hydrocarbon in a water body. Zero-valent iron serves as a matrix, cobalt powder, sodium amide and zero-valent iron powder are mixed through a mechanochemical method, ball milling is carried out under the inert atmosphere, and the cobalt-nitrogen synergistic modified ternary nitride structure is formed. The cobalt powder and the sodium amide are doped into the surface and the interior of the zero-valent iron, so that the zero-valent iron generates lattice strain, the chlorohydrocarbon dechlorination capacity is improved, the preparation process is simple, low in cost, free of pollution and suitable for large-scale application, and the problems of low degradation efficiency and poor selectivity in chlorohydrocarbon pollution treatment are solved.

This invention discloses a method and apparatus for enhancing microbial catalytic degradation of chlorinated hydrocarbons in groundwater using a pulsed electric field, relating to the field of groundwater pollution remediation technology. By introducing microbial stimulants, including nutrients and electron donors, into the polluted groundwater area to enhance the activity of functional microorganisms, and applying a pulsed electric field to create a dynamic potential gradient, the method promotes pollutant migration and microbial metabolism, achieving a stepwise degradation of chlorinated hydrocarbons from highly chlorinated intermediates to low-chlorinated intermediates and ultimately to non-toxic alkanes. Simultaneously, monitoring data such as pollutant concentration, environmental parameters, and microbial activity are collected, and the pulsed electric field parameters and stimulant addition strategy are dynamically adjusted based on this data to match external stimulation with dechlorination requirements. This promotes the continuous and efficient conversion of highly chlorinated hydrocarbons to low-chlorinated hydrocarbons and ultimately to non-toxic alkanes, improving electron utilization efficiency and system stability, shortening the remediation cycle, and reducing energy consumption and the risk of secondary pollution.

The invention belongs to the technical field of groundwater environmental pollution remediation, and particularly relates to a polydisperse iron-carbon emulsion for removing high-salt and high-ammonia-nitrogen groundwater chlorinated hydrocarbon pollution and a preparation method and application thereof. The polydisperse iron-carbon emulsion with excellent dispersity, stability, rheological property and reaction activity is synthesized by taking polydisperse sulfurized zero-valent iron, biochar and a nano-emulsion as raw materials and combining high-speed shearing and rheological property characterization on the basis of specific process parameters and processes. The polydisperse iron-carbon emulsion can realize efficient removal of chlorinated hydrocarbon pollutants under complex underground water environment conditions such as high salt and high ammonia nitrogen. Meanwhile, the inhibition effect of high ammonia nitrogen on the reaction activity can be effectively resisted, the degradation efficiency on pollutants is effectively guaranteed, and the stability and adaptability of a remediation system under complex hydrochemical conditions are improved.

This invention belongs to the field of groundwater remediation technology and discloses a method for treating chlorinated hydrocarbon-contaminated groundwater using biochar in synergy with zero-valent iron (ZVI). The method includes the following steps: (1) mixing biomass with iron-containing materials and then pyrolyzing the mixture under oxygen-limited conditions at a temperature of 700-900°C to obtain biochar-ZVI material; (2) injecting the biochar-ZVI material into the chlorinated hydrocarbon-contaminated groundwater to be treated for reaction, with the reaction time lasting at least 7 days, thereby achieving the treatment of chlorinated hydrocarbons in the chlorinated hydrocarbon-contaminated groundwater; wherein the pH value of the chlorinated hydrocarbon-contaminated groundwater does not exceed 11. The biochar-ZVI material prepared using the specific process of pyrolysis at 700-900°C can effectively treat chlorinated hydrocarbons in chlorinated hydrocarbon-contaminated groundwater. The synergistic chemical effect between biochar and ZVI significantly increases the electron capacity of zero-valent iron in the reaction and enhances the reaction activity.

The invention discloses a solid adsorbent for selective adsorption of condensate oil chlorinated hydrocarbon. Raw materials of the solid adsorbent comprise an oil phase and a water phase, wherein the oil phase is prepared from the following components in parts by weight: 8 to 10 parts of octadecyl methacrylate, 1 to 3 parts of butyl methacrylate, 1 to 3 parts of diallyl phthalate and 0.5 to 1.0 part of cross-linking agent; the water phase is prepared from the following components in parts by weight: 0.5 to 1.0 part of an initiator, 0.1 to 1.0 part of a dispersing agent and 30 to 80 parts of water. According to the invention, rigid monomer divinyl phthalate is introduced into an acrylate polymerization system, so that a solid adsorbent with a stable three-dimensional porous structure is successfully constructed, and specific adsorption is enhanced through a polar effect while physical adsorption sites are increased; therefore, the solid adsorbent can efficiently adsorb chlorinated hydrocarbon pollutants in condensate oil in a high-capacity mode, and rapid separation and selective removal of the chlorinated hydrocarbon pollutants in an oil phase are achieved.

The invention belongs to the technical field of groundwater remediation, and relates to a method for remedying chlorohydrocarbon polluted groundwater by coupling ozone micro-nano bubbles with a circulating well, which comprises the following steps: installing a circulating well in a simulation tank, filling the tank with medium sand to simulate a groundwater aquifer medium, then introducing trichloroethylene sewage with a set concentration, and constructing a groundwater pollution simulation system; ozone micro-nano bubbles are generated; and coupling the ozone micro-nano bubbles with the aerodynamic circulation well to carry out underground water remediation. According to the method, volcanic rock is used as a catalyst, ozone micro-nano bubbles and a pneumatic circulating well technology are creatively fused, and typical chlorinated hydrocarbon-trichloroethylene polluted underground water is treated in a targeted mode. Experimental comparison shows that compared with traditional hydrogen peroxide or metal salt catalysis, the method has the advantages that on the basis of saving the cost, the remediation period can be remarkably shortened, the pollutant removal rate is increased, secondary pollution is reduced, the underground water remediation process is accelerated, the dual goals of energy conservation and high efficiency are achieved, and the method has important practical application value and wide popularization prospects.

The present application relates to a kind of Ru / WNP / R-CeO2 catalyst for catalytic oxidation of chlorinated hydrocarbon and its preparation method and application.The catalyst is composed of highly dispersed Ru, W nanoparticle (WNP) and CeO2 carrier.It is prepared by hydrothermal method combined with excess impregnation method: first, prepare rod-shaped RCeO2 carrier and WNP toluene dispersion, then load WNP and Ru active component in turn by stepwise impregnation, and obtain by drying and calcining.The catalyst can completely oxidize high concentration (1000 ppm) of dichloromethane or chlorobenzene to HCl / Cl2, CO2 and H2O at lower temperature (300~350 ℃).Compared with prior art, the present application has the advantages of high catalyst activity, good selectivity, simple preparation method, wide industrial application prospect in the field of chlorinated organic waste gas purification, etc.

The application discloses a preparation method of a reactive temperature-resistant hyperbranched organosilicon resin containing chlorohydrocarbon groups, and belongs to the field of organic polymer chemistry. In the application, the siloxane monomer containing chlorohydrocarbon groups and the siloxane monomer not containing chlorohydrocarbon groups are first hydrolyzed into cores in water, and then the siloxane monomer containing or not containing chlorohydrocarbon groups, water, a solvent and a catalyst are added for condensation growth, and then a capping agent is added for continuous reaction. After the reaction is completed, the solution is subjected to neutralization, filtration and purification treatment, and thus the reactive temperature-resistant hyperbranched organosilicon resin containing chlorohydrocarbon groups is obtained. The preparation method is simple, the proportion of the non-active group and the active group can be regulated according to different application requirements, the method is simple and controllable, and large-scale production can be realized. The obtained organosilicon resin contains two active groups, i.e., reactive hydroxyl groups and hydrocarbon group chlorines, has a highly branched structure, has higher thermal stability and chemical stability, and has the advantages of high functionality, low viscosity, good solubility and low surface free energy.

The invention relates to the field of polluted water treatment, and particularly discloses a method for removing pollutants in underground water by activating sodium persulfate with activated carbon in cooperation with multivalent iron. The method comprises the following steps: taking underground water containing pollutants, and adjusting the pH value to an acidic condition to obtain acidified polluted water; adding activated carbon, multivalent iron and sodium persulfate into the acidified polluted water, and carrying out in-situ oxidation reaction; the multivalent iron comprises at least two of zero-valent iron powder, ferrous sulfide and ferrous disulfide. According to the method, sodium persulfate is activated by multivalent iron, high-concentration ROS is generated on the interface of the sodium persulfate, meanwhile, activation of the sodium persulfate can be promoted by adding activated carbon, a high-pollutant-concentration microenvironment is formed by utilizing the adsorption advantage of high specific surface area of the activated carbon, and pollutant degradation is promoted in cooperation with the multivalent iron. By adopting the method, the polluted underground water containing the chlorinated hydrocarbon and the polycyclic aromatic hydrocarbon can be efficiently and permanently treated.

The invention discloses bacillus cereus ZYL and application of the bacillus cereus ZYL in degradation of chlorinated organic pollutants. A degrading bacterium provided by the invention is a gram staining positive bacterium and can be metabolized by utilizing dichloromethane; under the condition of pure culture, the bacterium has better degradation capability on dichloromethane under the condition that the pH value is 6.0-8.0, and can completely degrade 35 mg / L dichloromethane within 96 hours under the conditions that the pH value is 7.0 and the temperature is 30 DEG C; the strain can grow and degrade the substrate by using dichloromethane as a carbon source and an energy source, has certain environmental adaptability, and can be used for repairing chlorinated hydrocarbon polluted atmosphere and polluted environment.

The application provides a method for repairing a chlorinated hydrocarbon contaminated site in situ and application thereof, the method injects polymer particles into the chlorinated hydrocarbon contaminated site for fermentation for a certain time, the polymer particles provide a carbon source and an electron donor required for in-situ microbial growth, meanwhile, the polymer particles inhibit the production of methane by methanogenic archaea in the in-situ microorganisms, help the chlorinated hydrocarbon degrading bacteria in the in-situ microorganisms to compete for the electron donor, improve the utilization of the electron donor by the chlorinated hydrocarbon degrading bacteria, and promote the degradation of the chlorinated hydrocarbon; the polymer particles are biodegradable high molecular polymer particles. By adjusting the particle size of the biodegradable high molecular polymer particles to 10 2 microns, the 10 2 micron biodegradable high molecular polymer particles can selectively inhibit the functional characteristics of the metabolism of methanogenic archaea, help the chlorinated hydrocarbon degrading bacteria to compete for the electron donor, thereby improving the utilization efficiency of the electron donor by the chlorinated hydrocarbon degrading bacteria, and improving the repair effect of the chlorinated hydrocarbon.

The application belongs to the technical field of lithium batteries, and particularly relates to a non-flammable local high-concentration ionic liquid electrolyte containing a chlorinated hydrocarbon diluent and application. The application successfully finds that the non-flammable chlorinated hydrocarbon with lower cost can be used as a diluent of the local high-concentration ionic liquid electrolyte, so as to improve the problems of high viscosity, poor impregnation with a separator and low ionic conductivity of the ionic liquid electrolyte, and can effectively improve the cycle performance, rate performance and safety performance of the lithium battery, and improve the safety of the electrolyte. The chlorinated hydrocarbon can replace the higher-cost hydrofluoroether compound, and then reduce the production cost of the local high-concentration ionic liquid electrolyte. Moreover, the local high-concentration ionic liquid electrolyte using the chlorinated hydrocarbon compound has an electrochemical stability voltage of more than 4.5V, is suitable for a high-voltage positive electrode material, fully develops the battery capacity, and improves the energy density of the battery. Meanwhile, the local high-concentration ionic liquid electrolyte of the application can meet high-temperature operation, and has a wide application scenario.

The invention discloses a sulfur-nickel zero-valent iron material for deep hydrogenolysis dechlorination based on a high-valence sulfur source and application, and belongs to the field of environmental remediation materials. According to the method, a one-step ball milling process is adopted, an iron source, a nickel source and a high-valence sulfur source are subjected to co-ball milling, and the sulfur-nickel co-doped ball-milled zero-valent iron material is prepared. Compared with a conventional material using a low-valence sulfur source, the high-valence sulfur source is introduced, so that the microstructure and the surface chemical state of the material can be remarkably regulated and controlled, the degradation path of the chlorinated hydrocarbon is effectively changed, the chlorinated hydrocarbon is mainly degraded through a deep reduction hydrogenolysis path, and the degradation efficiency of the chlorinated hydrocarbon is improved. And a beta-elimination way which easily generates toxic by-products such as dichloroethylene and vinyl chloride is not used. The material shows more thorough dechlorination capability and higher electronic efficiency in the remediation of chlorinated hydrocarbon pollutants such as trichloroethylene, meanwhile, the dissolution amount of nickel ions is kept extremely low, and the material is environment-friendly. The invention provides a novel technical approach for developing a novel efficient and stable chlorohydrocarbon repair material without accumulation of byproducts.

This invention discloses a modified alumina nanoparticle and a modified composite adsorbent, as well as their preparation method and application, belonging to the field of polymer adsorbent technology. The modified alumina nanoparticle preparation method is as follows: (1) Alumina nanoparticles are added to a dispersion medium, ultrasonically treated, the supernatant is removed, and more dispersion medium is added; (2) A silane coupling agent is added, the mixture is stirred, washed, and dried to obtain the final product. The modified composite adsorbent includes an oil phase and an aqueous phase; the preparation method is as follows: (1) An oil phase is obtained; (2) A suspension is formed; (3) An aqueous phase is obtained; (4) The oil phase is added to the aqueous phase, stirred, aged, cooled, washed, and dried to obtain the final product. In an acrylate-based polymerization system, this invention introduces modified alumina nanoparticles to chemically modify the material surface, increasing the density of surface active sites and enhancing the specific capture ability of chlorinated organic compounds, thereby achieving rapid capture and selective separation of chlorinated hydrocarbons in the oil phase.