122 results about "In situ chemical oxidation" patented technology

The invention relates to a remediation technology for organic contaminated soil. According to the remediation technology for the organic contaminated soil, layered stepped type back excavation construction treatment is adopted, a remediation greenhouse has the height limit of 14m, the soil is divided into 3 layers, the soil with the depth of 0-4m is a first layer, the soil with the depth of 4-8m is a second layer, and the soil with the depth of 8-14m is a third layer, wherein the soil with the depth of 0-4m adopts an ex-situ chemical oxidation remediation technology and is transported to a region outside the greenhouse after being remedied, the soil of a region with the depth of 4-8m is excavated one by one every 10m along the remediation greenhouse from inside to outside in the vertical direction and is transported to other regions in the greenhouse for rapid ex-situ chemical oxidation remediation, and meanwhile, the excavation region with the depth of 8-14m is subjected to in-situ chemical oxidation remediation. The remediation technology for the organic contaminated soil has the advantages that the layered stepped type back excavation construction treatment is adopted, and therefore the technology cannot be limited by equipment and can be safer, and the treatment effect can be better.

The invention relates to a preparation method of a lanthanum-doped barium ferrite-polyaniline composite material microwave absorbent. Lanthanum-doped barium ferrite is prepared from nitrate of barium, ferrum and lanthanum and an aniline monomer which serve as main raw materials by a sol gel-self-propagating method; and a lanthanum-doped barium ferrite-polyaniline composite is prepared by an in-situ chemical oxidation method. Due to organic composition of the lanthanum-doped barium ferrite and the polyaniline, advantages of the two components can be maintained; electromagnetic parameters of a material can be cut; microwave absorption frequency band is widened; the material density is reduced; absorption efficiency is improved; comprehensive properties are improved; the problems of high thickness, heavy weight, narrow frequency band, low absorbability and the like of the single ferrite wave-absorbing material are solved; thin, light, wide and strong requirements of a wave-absorbing coating are met; and the lanthanum-doped barium ferrite-polyaniline composite material microwave absorbent is an ideal and high-performance microwave absorbent.

The invention discloses a water dispersing carbon nanometer pipe and making method of modified conductive polyaniline derivant surface, which is characterized by the following: dissolving the water-soluble phenylamine derivant monomer into inorganic acid solution; adding carbon nanometer pipe to be dispersed evenly through ultrasound; oxidizing and polymerizing to coat the water-soluble conductive phenylamine derivant on the carbon nanometer pipe surface evenly acted by oxidizer through original position chemistry; obtaining the product with simple and feasible method, strong controllability as well as good water dispersion and superior conductivity; fitting for making high-strength, antistatic and microwave-adsorbing material as mass transmitting and transferring carrier for special functional nanometer element and different systems; displaying wide applying prospect in the material science, nanometer technique and life science.

A conductive elastomeric foam composite is presented, comprising an elastomer foam and polypyrrole, thiophene, or aniline and derivatives thereof. The foam is manufactured by first diffusing an oxidant into the dense polymer phase of a solvent-swollen foam and then diffusing pyrrole or pyrrole derivative vapor or solution into the dried foam, resulting in an in situ chemical oxidative polymerization of pyrrole at the oxidant site. Only about 5 wt % of conductive polymer is required for observing an insulator to conductor transition. The conductivity of the composite foam can be effectively controlled between 10-7 and 10-1 S / cm by varying either the amount of oxidant used and / or the copolymer composition.

The invention relates to an in-situ chemical oxidation restoration construction method for organic contaminated soil and belongs to the field of soil restoration. The construction method comprises the steps of 1, leveling; 2, positioning; 3, drilling; 4, oxidizing agent preparation; 5, oxidizing agent injection; 6, activating agent preparation; 7, activating agent injection; and 8, maintenance. Through in-situ agent injection restoration of contaminated soil, soil structure damage caused by soil excavation is avoided, and restoration cost is reduced. Through activating agent injection, the oxidizability of an oxidizing agent can be improved, and restoration efficiency can be improved. The influence radius of agents is increased by means of the high-pressure jet grouting technique, and low-permeability contaminated soil can also be well restored. A restored site can still be used for secondary development and utilization, recycling application of land is achieved, and great economical benefits and social benefits are realized. The construction method is wide in application range, reliable in restoration effect, economical and feasible, can be used for restoring contaminated sites which can not be excavated, and can also be applied to contaminated sites with poor soil permeability.

The invention discloses an organic contaminated site reinforced repair system which comprises an extraction system, a medicament injection system, a heating system and a blocking repair layer. According to the organic contaminated site reinforced repair system, the in-situ thermal desorption technology and the chemical oxidization technology are combined, meanwhile, a repair material layer is added, the repair material layer is prepared from slow release oxidization materials and mainly prepared from persulfate, natural clay materials, nonmetallic mineral, cement and the like, and sulfate radical produced after persulphate reaction can be fixed. By means of the repair system, on one hand, the organic contaminated site in-situ thermal desorption repair cost can be reduced; on the other hand, the in-situ chemical oxidation repair efficiency can be improved, secondary pollution can be reduced, accordingly, the repair cost is reduced, and the repair efficiency is improved.

The invention belongs to the technical field of hydrogel materials and discloses polypyrrole nano composite conductive hydrogel and a preparation method thereof. The method comprises the following steps of a, using pyrrole as a monomer and dopamine as a dopant for in-situ chemical oxidative polymerization to prepare a polypyrrole nano material; b, uniformly mixing the polypyrrole nano material, modified gelatin and a photoinitiator in a solvent, and carrying out ultraviolet light initiation polymerization to obtain the polypyrrole nano composite conductive hydrogel. The modified gelatin is obtained by modifying gelatin with methacrylic anhydride. According to the hydrogel material, by modifying polypyrrole with dopamine, the polypyrrole nano material is obtained; the polypyrrole nano material can be well dispersed in a hydrogel matrix material and meanwhile can stably exist under the hydrogen bond action with hydrogel molecules. The prepared conductive hydrogel has excellent conductivity and stable chemical property, and the mechanical property of the hydrogel is improved.

The invention provides a method for improving the stability of a fuel cell catalyst and the utilization rate of the catalyst, which belongs to the technical field of fuel cells. A layer of conductive polyaniline with conjugated large pai bond structure is modified on the carbon surface of a Pt / C (platinum / carbon) catalyst through the in-situ chemical oxidation polymerization method, on the one hand, migration, aggregation and growth of Pt nano-particles on the surface of a carbon carrier can be prevented by utilizing strong interaction between polyaniline and the Pt nano-particles, and the stability of the catalyst can be further improved; on the other hand, the polyaniline is an excellent proton-electron conductor and simultaneously has excellent oxygen permeability, by covering the polyaniline on the carbon carrier, the probability of exposing the Pt nano-particles on a three-phase reaction interface of the fuel cell can be increased, and the utilization rate of the catalyst can be further improved. The method is simple and easy for operation, the production cost is low, and the catalyst prepared by adopting the invention can be applied in the fuel cells taking proton exchange membranes as electrolytes. The fuel cells manufactured by using the invention can be widely applied in electric vehicles, various spacecrafts, portable electronic equipment such as cameras, notebook computers, electric toys and the like.

The invention discloses an in-situ chemical oxidation restoration method for chlorinated olefin-polluted soil and underground water, comprising the following steps of: putting a permeable reactive barrier in a reactive tank and transversely arranging a compound potassium permanganate release system in the permeable reactive barrier, wherein the compound potassium permanganate release system is prepared from paraffin, silica sand and potassium permanganate; then diluting a high-concentration TCE (Trichloroethylene) liquor on line to keep the concentration of chlorinated olefin between 0mg / L and 100mg / L, controlling the flow speed of the TCE liquor in the reactive tank at 71.4cm / d, and guiding the TCE liquor to flow in from the water inlet end of the reactive tank and flow out from the water outlet end of the reactive tank after flowing through the permeable reactive barrier to finish water treatment. When the method is used for water treatment, the removal rate of TCE after two days can reach 100% and the removal rate of the TCE can be kept at 100% through continuously restoring for thirty-three days. The method disclosed by the invention has a short restoration cycle and no secondary pollution and can be used for restoration for a long term; the potassium permanganate, the paraffin and the silica sand are cheap and easy to get; and a good chlorinated olefin treatment effect can be achieved on the premise of rational cost so that the prospect is broad.

The invention comprises a preparation method of composite anode material for lithium element sulphur secondary battery, belonging to the field of chemical energy storage battery. The composite material is formed by taking element sulphur as electrode active center and conductive polymer polythiophene with excellent in-situ chemical oxidation polymerization conductivity as shell. The concrete preparation method comprises adding anhydrous chloroform in element sulphur and anhydrous ferric chloride, mixing uniformly, putting into a controllable low temperature reaction kettle, and slowly adding monomer thiophene by adopting in-situ chemical oxidation polymerization process to clad polythiophene on the surface of sulphur granules to form the composite product with uniform granules. The composite anode material prepared by the inventive method has high electrochemical activity, and the battery packed by the material has large discharge specific volume and long cycle life, thus having advantage in new system of large volume energy storage battery.

The invention discloses an in-situ oxidation medicine and a pollution soil in-situ oxidation remediation method. The in-situ oxidation medicine comprises components sodium persulfate, calcium oxide, an iron-containing compound, a surfactant and a cosolvent according to the weight ratio of (60-70):(20-30):(10-15):(5-10):(1-5). The mediation method comprises the following steps: (1) dividing a pollution area; (2) arranging points and drilling wells; (3) preparing a medicine; (4) injecting the medicine. By adopting the pollution soil in-situ oxidation remediation method, the problems can be solved. The in-situ oxidation medicine and the pollution soil in-situ oxidation remediation method are easy to operate, the time and labor can be saved, and an address structure is not damaged.

The invention provides a method for manufacturing a solid polymer electrolytic condenser and belongs to the technical field of electronic elements. The method is characterized in that a first conducting polymer layer is prepared on the surface of tantalum pentoxide electrolyte, a second conduction polymer layer is prepared on the surface of the first conducting polymer layer, intrinsic conductive polymer is prepared on the first conducting polymer layer through the in-situ chemical oxidative polymerization method, the second conducting polymer layer is prepared through conducting polymer suspension liquid, and a middle adhesion layer is prepared between the first conducting polymer layer and the second conducting polymer layer through silane. The electrolytic condenser manufactured through the method is stable in electrical property like capacitance, leak currents, ESR and loss under various complex environments, and has high high-temperature resistance, high-humidity resistance and high-voltage resistance abilities.

The invention relates to a carbon-material supported catalyst for an acetylene hydrochlorinate reaction. The catalyst mainly comprises active components and a supporter, the active components of the catalyst are palladium chloride, the loading capacity of the active components is 0.01-15wt%, and the supporter of the catalyst is one of a carbon nano tube, carbon fibers, graphene and other carbon materials. The supporters of the catalyst is prepared by adopting an in-situ chemical oxidative polymerization pretreatment method and a soaking method, and the activity of the catalyst is evaluated and tested under the condition that the feed gas space speed is 120h-1, the feed gas proportion is that V(HC1):V(C2H2)=1-2, pressure is normal, and reaction temperature is 100-200 DEG C. The carbon-material supported catalyst has the advantages that the prepared catalyst is environmentally friendly, the components of the catalyst are simple and stable, and the catalytic activity is high; the conversion percent of acetylene is larger than 96%, and the selectivity of chloroethylene can reach more than 99%.

The invention provides a double-liquid shallow-mixing in-situ chemical oxidation repair method for contaminated soil and groundwater and belongs to the technical field of contaminated soil and groundwater repair methods. The method comprises the following steps of (1), site leveling and zone measuring, (2), surface crushing and screening and cofferdam building, (3), shallow mixing equipment assembling and debugging, (4), agentia dispensing, wherein an oxidizing agent is dispensed to a first dispensing station, a catalyst, an inhibiter and a pH modifier are dispensed to a second dispensing station, and a double-liquid dispensing system is formed; (6), adding and shallow mixing construction of the double kinds of liquid dispensed to the first dispensing station and the second dispensing station, (7), surface layer curing, (8), agentia reaction and monitoring and (9) self-inspection and acceptance. According to the method, mixing equipment with an excavator and professional mixing heads and the double-liquid dispensing system are adopted, in-situ mixing can be achieved while an agentia solution is added, the reaction period is short, and the problem of the shallow contamination of the soil and groundwater can be solved.

The invention discloses a preparing method of conductive composite material of polythiofuran or derivant-multiwall carbon nanometer pipe, which comprises the following steps: disposing the surface of multiwall carbon nanometer pipe; dispersing in the chloroform; adsorbing monomer on the multiwall carbon nanometer pipe; adding initiator to polymerize; obtaining the product; changing the kind of substituted base of thiofuran ring to adjust the solubility.

The invention relates to an enhanced in-situ chemical oxidation repairing technology of soil and underground water. The enhanced in-situ chemical oxidation repairing technology comprises the steps offield measurement, repairing equipment construction, oxidation reagent injection, air injection, biopreparate injection, gas-liquid separation and tail gas treatment. Oxidation reagents are conveyed to a polluted part by using a dosing pump through a horizontal reagent injection well, reaction gas is conveyed to a gas-liquid separation device by an extraction pump through a horizontal extraction well, and separated gas is removed through a plasma purifier; and after reagent injection is conducted, gas injection is conducted on a horizontal gas injection well through a gas injection pump, and after a certain period, biopreparate is injected into the polluted part through the dosing pump. According to the enhanced in-situ chemical oxidation repairing technology of the soil and the underground water, the removing rate to the total petroleum hydrocarbon in a polluted site with the concentration of the total petroleum hydrocarbon (less than C16) being high can reach over 90%, the single well repairing area is large, the application range is wide, and secondary pollution is low.

The invention provides a preparing method of a magnetic-electro dual function nanofiber membrane, which can be used for a scaffold material for tissue engineering. Fe3O4 magnetic nanoparticles are dispersed in a polymer spinning solution, magnetic nanopolymer fiber can be obtained by an electrospinning technique, and conductive high polymer monomers are polymerized at the surface of magnetic electrospinning nanofiber by an in-situ chemical oxidation method to obtain the magnetic-electro dual function nanofiber membrane. The nanofiber membrane prepared by the method has well conductivity and magnetism, and has a promotion action for cell proliferation.

The invention relates to an organic polluted soil and underground water restoring method. Pollutants of soil and underground water are organic pollutants. The treatment method comprises two parts that (1) the A area is an overlapping polluted area of the soil and the underground water and adopts an in-situ chemical oxidation restoring technology method; and (2) only an underground water polluted area exists in the B area, and a pump-and-treat technology method is adopted. According to the organic polluted soil and underground water restoring method, restoring work of the soil and the underground water in different areas is conducted in a mode that various restoring technologies are combined, thus, it can be guaranteed that the construction period is shortened, and the cost is reduced, while it can be guaranteed that good restoring effects of the soil and the underground water are achieved, cross pollution and agent waste cannot be caused.

The invention discloses a preparation method for a cationic aqueous polyurethane / polypyrrole conductive composite. According to the invention, aqueous polyurethane emulsion is used as a substrate, and a series of aqueous conductive materials are prepared by using an in-situ chemical oxidative polymerization process. The preparation method comprises the following steps: with isocyanate, polymer polyol and a cationic chain extender as raw materials, carrying out polymerization, cooling, neutralization and water dispersion so as to prepare a cationic aqueous polyurethane dispersion; and then with the aqueous polyurethane as the substrate, subjecting the conductive materials to in-situ chemical oxidative polymerization on the surface of substrate micelle under the action of an oxidant so as to prepare the cationic aqueous polyurethane / polypyrrole conductive composite. With the method provided by the invention, functionalization of conduction of the aqueous polyurethane dispersion and environment-friendliness are realized, and the prepared composite has stable conductivity and high conductance. The prepared composite has a nanometer particle size and excellent performance; through adjustment of a formula, the composite can be used both in conductive materials and in fields like anti-static materials.

The invention discloses a preparation method for a sustained release potassium permanganate microcapsule, comprising the following steps that (1), stearic acid is arranged in a reactor, absolute ethyl alcohol is added to the reactor, the reactor is heated in water bath, the solution in the reactor is sufficiently stirred until the stearic acid is completely dissolved; (2), polyethylene glycol 4000 and potassium permanganate are added to the reactor, potassium permanganate is homogeneously dispersed in the solution through ultrasound, the ultrasound is stopped, the solution is stirred and naturally cooled to the temperature of below 35 DEG C, and the reaction is finished after solid is completely dissolved out; and the mass ratio of potassium permanganate to stearic acid is 1:1-1:3. The preparation method for the sustained release potassium permanganate microcapsule solves the problems of low utilization rate of oxidant, high non-preference consumption and mass transfer of oxidant in the process of removing underground water pollutants by the in-situ chemical oxidation of liquid and powder potassium permanganate, and realizes the purposes of sustained release, effective transmission and efficient oxidation of the oxidant.

The invention discloses a polypyrrole coated hard carbon cathode material and a preparation method thereof. The polypyrrole coated hard carbon cathode material adopts a hard carbon sphere as the substrate, which is coated with a polypyrrole layer. The preparation process comprises: taking glucose as the carbon source, preparing a hard carbon sphere material by a hydrothermal calcination method, taking ferric chloride hexahydrate as the oxidant, and preparing the polypyrrole coated hard carbon cathode material by an in-situ chemical oxidation method. The process involved in the invention is simple, has good repeatability, and has no need of adding additives. The prepared composite material has good electrical conductivity, thus being in favor of bringing the electrochemical performance of the lithium ion battery cathode material into play.

The invention discloses a preparation method of a compound electrochromic thin film. The method includes: adding water to a monomer, doping acid and an oxidation-reduction indicating agent to prepare a polymerization reaction solution, using an in-situ chemical oxidation polymerization method to compound the oxidation-reduction indicating agent with conductive polymer to obtain a conductive polymer / oxidation-reduction indicating agent compound electrochromic solution, and using the solution to form the electrochromic thin film on transparent conductive glass or a porous film through spin coating, spraying, lifting or printing film forming. The preparation method has the advantages that the color reaction of the oxidation-reduction indicating agent in the electrochromic process of the conductive polymer is utilized to improve the color changing performance of a conductive polymer electrochromic material, different macromolecule doping acids are used in the in-situ chemical polymerization reaction to obtain the water-soluble compound electrochromic solution, and the compound electrochromic thin film good in electrochromic performance is obtained finally.

The invention discloses a preparation method of a polyaniline / stretchable fabric electrode material, an obtained material and applications of obtained materials. The preparation method comprises the following steps: 1) enabling a stretchable fabric substrate to soak in an acidic aqueous solution containing aniline monomers; 2) dropping an aqueous solution of an oxidizing agent into the mixed system obtained in the step 1) under a stirring condition, carrying out an in-situ chemical oxidation polymerization reaction, cleaning and naturally drying an obtained product to obtain a pre-electrode material; 3) placing the pre-electrode material in a three-electrode system device and making the pre-electrode material serve as a working electrode to carry out an electrochemical polymerization reaction, cleaning and naturally dry an obtained product, and then obtaining a polyaniline / stretchable fabric electrode material. The prepared polyaniline / stretchable fabric electrode material has good tensile performance and flexibility, and also has good electrical conductivity, and has great potential application values in the fields of wearable electronic equipment, supercapacitors and the like.

The invention provides a preparation method of polyaniline / montmorillonite composite adsorbent with a sheet structure, which belongs to the technical field of preparation of polymeric nanocomposites. According to the preparation method, polymer acid with a doping function is adopted for modifying the surface of montmorillonite, the characteristics of unique two-dimensional structure and huge specific surface area of the montmorillonite are utilized, and an in-situ chemical oxidative polymerization method is adopted to organically combine polyaniline with the montmorillonite, thus obtaining the composite material with the sheet structure. The preparation method provided by the invention is simple in preparation technology and controllable in condition; and the prepared polyaniline / montmorillonite composite material is low in cost, has the characteristics of high adsorption and environment friendliness, is capable of markedly improving the adsorption efficiency and the adsorption capacity of the polyaniline to organic anionic dye and heavy metal ions, and is suitable for the fields of industrial wastewater treatment and the like.

The invention discloses a high-strength antifreeze conductive polypyrrole hydrogel and a preparation method thereof, and belongs to the field of polymer materials. The high-strength antifreeze conductive polypyrrole hydrogel is obtained by in-situ chemical oxidative polymerization of a pyrrole monomer in a hydrogen bond-enhanced polymer network, multiple freezing and thawing cycles, and partial displacement of moisture in the gel by a low freezing point medium. The method is wide in raw material source and easy to operate and facilitates industrial production. The high-strength antifreeze conductive polypyrrole hydrogel prepared with the method has good electrical conductivity and mechanical properties, can withstand a relatively wide temperature range, and is unlikely to lose water, shrink and freeze. The high-strength antifreeze conductive polypyrrole hydrogel can withstand subzero 20 DEG C for 72 hours without being frozen, can be placed at 80 DEG C for 4 hours without drying and shrinking, and has an electrical conductivity of 0.5-1.5 S / m, a tensile strength of 0.5 MPa and a compressive elastic modulus of 200 kPa.

The invention provides an oil-water separation material with pH responsiveness and a multi-stage structure and a preparation method of the oil-water separation material. The method comprises the following steps of taking aminobenzene as a monomer, perfluorooctanoic acid as a dopant and ammonium persulfate as an oxidizing agent, taking a polyester screen mesh, porous sponge, cotton fabric, cotton and the like respectively as base materials, synthesizing a polyaniline composite material with a micro / nano multi-stage structure by adopting an in-situ chemical oxidation polymerization method, wherein the oil-water separation material has a large quantity of micro stagger polyaniline fiber on an overall woven mesh structure. Polyaniline and sponge are mutually compounded to form a novel materialwith super-hydrophobic / super-oleophilic performance. The polyaniline composite material synthesized in one step by adopting an aminobenzene in-situ chemical oxidation polymerization method is used for oil-water separation, the synthetic process is simple, and the raw materials are easy to obtain; the oil-water separation material has universality and can be applied to multiple kinds of base material surfaces; the material can be used for carrying out oil-water separation of an oil / water / oil three-phase system through adjusting and controlling a pH value, different organic solvents in water are absorbed, and can be discharged in an basic solvent without needing to draw support from external force.

The invention discloses an electric heating enhanced in-situ chemical oxidation remediation device for an organic contaminated site, and the device comprises an injection heating unit, an electric enhancement unit, an extraction unit and a monitoring unit, wherein the monitoring unit is connected with the heating unit, the electric enhancement unit and the extraction unit so as to perform real-time monitoring and control. With the adoption of the manner, according to the electric heating enhanced in-situ chemical oxidation remediation device for the organic contaminated site, an in-situ chemical oxidation technology is coupled with an electrokinetic remediation technology, and an electric field is applied to contaminated soil, so that the effect of promoting migration of substances in thesoil can be achieved; the device has the remarkable advantages of being capable of being used for low-permeability soil and free of secondary pollution; meanwhile, the thermal function is added in theinjector, the agent utilization rate and the remediation effect are remarkably improved, the technology application scene is wider, cost waste is effectively avoided, and the defects existing in an original in-situ chemical oxidation technology are overcome.

The invention relates to an organic polluted site soil in-situ chemical oxidation repairing method based on iron cycling regulation. The organic polluted site soil in-situ chemical oxidation repairing method comprises the steps that a mixed solution of natural organic small molecules and hydrogen peroxide is added into to-be-repaired organic polluted site soil; iron minerals naturally existing in the soil is activated through the natural organic small molecules to serve as effective iron sources for decomposing the hydrogen peroxide; and the hydrogen peroxide is efficiently decomposed into hydroxyl free radicals, so that organic polluted site soil in-situ chemical oxidation repairing is achieved. According to the organic polluted site soil in-situ chemical oxidation repairing method based on iron cycling regulation, the iron minerals naturally existing in the soil is activated through the natural organic small molecules, so that the problem that ferrous ions need to be additionally added in a traditional hydrogen peroxide chemical oxidation technology is solved, and the mass transfer problem caused by direct contact between the hydroxyl free radicals produced through hydrogen peroxide decomposition and organic pollutants in the soil is solved; and the method is used for in-situ chemical oxidation repairing of the organic matter polluted soil and has the advantages of being efficient, non-selective, savable in cost, environmentally friendly, free of secondary pollution, and the like.

The invention provides a solid-phase shallow stirring in-situ chemical oxidation repair method for soil and underground water, and belongs to the technical field of soil and underground water repair methods. The solid-phase shallow stirring in-situ chemical oxidation repair method includes the following steps of (1) field leveling and measurement zoning; (2) surface layer crushing and sieving and cofferdam setting; (3) shallow stirring equipment assembling and debugging; (4) solid oxidizing agent and activating agent addition; (5) shallow stirring construction; (6) surface layer curing; (7) chemical reaction and monitoring; and (8) self-inspection and acceptance. The solid-phase shallow stirring in-situ chemical oxidation repair method is suitable for repairing shallow saturated soil and underground water organic pollution and repairing underground water heavy pollution, the problem of being low in parameter of shallow heavy organic pollution chemicals added in the first turn of construction can be solved, and the oxidizing agent K adding ratio upper limit can reach 1.5%-6%. The method is easy and convenient to operate and high in construction efficiency, the reaction period is relatively long, an oxidizing agent and organic matter in the underground water can be reacted in a sustainable mode, and the underground water pollutant concentration regain is effectively prevented.

The invention discloses a preparation method of magnetic polypyrrole. The preparation method comprises the following steps: dissolving FeCl2.4H2O and FeCl3.6H2O in HCl liquor, under protection of N2, dropwise adding into NaOH liquor for stirring and co-precipitating, and then washing by deionized water until the liquor is neutral, drying in vacuum and grinding to obtain Fe3O4 nano particles; adding the Fe3O4 nano particles into deionized water, carrying out ultrasonic treatment in the presence of N2, mechanically stirring after adding FeCl3, mechanically stirring again after adding pyrrole, adding acetone to terminate the reaction after the reaction is ended, and washing reactants by deionized water and acetone for a plurality of times; and finally, drying in vacuum and grinding to obtain magnetic polypyrrole. The invention further discloses a method of adsorbing nitrate in water by magnetic polypyrrole, wherein magnetic polypyrrole is added into water for adsorbing nitrate ions in water, and a magnet is separated after adsorption saturation. According to the invention, an in-situ chemical oxidization method is utilized to synthesize a magnetic polypyrrole adsorbent, the synthetic method is simple, a removing effect is remarkable, and the adsorbent can be regenerated and recycled.