375 results about "Persulfate" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.

The invention relates to the technical field of iron ore tailing resource utilization, in particular to a method for preparing iron oxide yellow by leaching iron ore tailings through an advanced oxidation technology, which comprises the following steps: adding a required amount of iron ore tailing powder into a persulfate solution, stirring to react, adding a reducing agent, boiling, filtering, adding alkali liquor to adjust the pH value, and filtering, thereby obtaining the iron oxide yellow. Pure liquid containing ferrous ions is obtained; taking part of the pure solution containing ferrous ions, and adding a potassium hydroxide solution to obtain an iron oxide yellow seed crystal solution; adding a pure solution containing ferrous ions into the iron oxide yellow seed crystal solution, adding an alkali solution to adjust the pH value, reacting, and separating and drying a product to obtain the iron oxide yellow. According to the method, the persulfate is adopted to leach iron from the iron ore tailings, and the iron oxide yellow is prepared from the leachate; harmless treatment of the iron ore tailings and value-added utilization of valuable resources are achieved, the raw material source of the iron oxide yellow industry is widened, and a wider prospect is provided for development of iron oxide yellow.

The invention relates to the technical field of water pollution control and treatment, and particularly discloses a method for deeply treating wastewater based on an adsorbent, which comprises the following steps of: firstly, introducing a mixed gas of carbon dioxide and air into fly ash water washing liquid, and removing calcium ions in the water washing liquid in a calcium carbonate precipitation form in a continuous introducing process; interference of calcium ions on adsorption and electrodialysis processes in the subsequent treatment process is avoided, heavy metals in the water washing liquid are accurately adsorbed and removed while the iron-sulfur loaded magnetic mesoporous biochar is used for activating efficient oxidation of persulfate, finally, electrodialysis treatment is performed on the water washing liquid by using a self-made bipolar membrane, chlorine in water is taken out, and the heavy metals in the water washing liquid are removed. And the washing liquid can meet the requirement of wastewater discharge.

The invention provides an efficient chloramphenicol degradation method based on Co-Cu-carbon composite nano-catalyst activated peroxymonosulfate, which comprises the following steps: regulating the Co / Cu molar ratio in a bimetal organic framework precursor, and performing pyrolysis to prepare the Co-Cu-carbon composite catalyst with an optimized pore structure, graphitization degree and metal dispersity; peroxymonosulfate is activated by utilizing the synergistic effect of Co / Co and Cu / Cu redox pairs to generate sulfate free radicals, hydroxyl free radicals, singlet oxygen and superoxide free radicals, and direct oxidative degradation of chloramphenicol is promoted by taking a catalyst as an electron transfer bridge; the method realizes rapid and efficient removal of chloramphenicol, high mineralization rate, excellent cycle stability and strong anti-interference capability, and solves the technical problems of low removal efficiency, high cost and easy secondary pollution in the prior art.

The invention provides an oxygen vacancy defect carbon nitride anchored iron atom cluster catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. Iron atoms are anchored in a carbon nitride (Ov-C3N4) structure containing oxygen vacancy defects in a cluster form, and Fe-Ov-C defect bonds are formed between the oxygen vacancy defects in C3N4 and iron atom clusters to stabilize the iron atom clusters, so that the problem of thermodynamic instability of the catalyst is solved while higher atom utilization efficiency is obtained; the Fe-Ov-C defect bond atoms can reasonably regulate and control the electronic structure of the center of an iron cluster d band, so that the catalytic activity and the cycling stability are greatly enhanced; besides, iron atom clusters and persulfate act to cause O-O bond breakage, non-free radical singlet oxygen is formed, and the problem that the catalytic efficiency is sharply reduced due to free radical annihilation in a complex water environment can be effectively solved.

The invention discloses a preparation method of an iron-manganese bimetallic catalytic material by using copper slag. The preparation method comprises two steps of pretreating the copper slag and preparing the iron-manganese bimetallic catalytic material. The iron-manganese bimetallic catalytic material prepared by the method belongs to a porous material, is rich in pores and large in specific surface area, is rich in Fe < 3 + >, Mn < 3 + >, Mn < 4 + > and other active sites on the surface, has the advantages of high catalytic activity, good stability and environmental friendliness, and realizes reduction and high-value utilization of the copper slag. In addition, the prepared iron-manganese bimetallic catalytic material can be used for catalyzing persulfate to form an advanced oxidation system, and is suitable for degradation treatment of organic wastewater such as printing and dyeing wastewater, pharmaceutical wastewater, food wastewater and raffinate.

The invention provides a surface modification method for a lithium-rich manganese-based positive electrode material, which comprises the following steps of: washing by using a peroxide-containing aqueous solution, properly increasing the washing temperature (preferably 40-80 DEG C), regulating the reaction pH value to 1-7, accurately controlling the ratio of acidity to free radical oxidation reaction, and optimizing the interface stability, oxygen vacancy density and Li < + > diffusion rate, thereby obtaining the lithium-rich manganese-based positive electrode material. Meanwhile, the dosage of peroxide (preferably persulfate) is reduced, the reaction time is shortened, the modification efficiency is improved, the raw material consumption is reduced, and the production cost is reduced.

The invention discloses a sewage treatment process for organic wastewater, and belongs to the field of sewage treatment.The sewage treatment process comprises the following steps that S1, wastewater containing nitrogen-containing organic phosphonic acid metal complexes is pumped into a dielectric barrier discharge reactor, and P-C bond energy is reduced through high-energy electron bombardment; s2, adding a modified layered metal hydroxide containing interlayer co-intercalation carbon quantum dots and persulfate and a composite oxidant of aspergillus niger immobilized microspheres into the wastewater subjected to plasma treatment; s3, deeply adsorbing heavy metal ions in the wastewater subjected to composite oxidation treatment in a gradient magnetic field by utilizing a magnetic layered metal hydroxide material; s4, the wastewater subjected to magnetic adsorption sequentially passes through an anaerobic ammonia oxidation coupling reactor and an aerobic biological membrane-activated sludge system to degrade pollutants; s5, dephosphorizing the wastewater subjected to biological treatment by algae by adopting a layered immobilized phycomycete symbiotic system; and S6, tail end magnetic recovery and effluent disinfection. The invention aims to solve the problems of low decomplexing efficiency and halfway decomplexing in the prior art.

The invention relates to the technical field of degradation-resistant organic wastewater treatment, in particular to a cathode and anode type electro-Fenton coupling wastewater treatment device and method.The cathode and anode type electro-Fenton coupling wastewater treatment method comprises the steps that a titanium electrode or a BDD electrode is adopted in an anode module, 0.05-0.5 mol / L sulfate radical serves as electrolyte, and persulfate is electrically synthesized in situ; a cathode module is a porous carbon electrode, and # imgabs0 # is generated through aeration at the speed of 0.5 L / min to 2 L / min; the space between the cathode modules is filled with three-dimensional invasive plant source biochar catalytic particle electrodes, the H-type double-chamber electrolytic tank separates a cathode chamber and an anode chamber through a proton membrane, and the method comprises an intermittent type (firstly adsorbing trace pollutants and then oxidizing, and biochar is renewable) and a continuous type (synchronously adsorbing and degrading high-concentration wastewater, and pretreating to improve biodegradability). The device realizes the cooperation of adsorption and electrocatalytic oxidation, efficiently treats refractory wastewater, promotes the recycling of invasive plants, and has both environmental protection and economic values.

The invention discloses a biomass carbon loaded manganese dioxide catalyst as well as a preparation method and application thereof. The biomass carbon loaded manganese dioxide catalyst comprises a carrier and MnO2 loaded on the surface of the carrier, and the carrier is carbonized biomass obtained by performing alkali treatment and hydrogen peroxide treatment on biomass and then carbonizing the biomass in an inert atmosphere. The supported catalyst prepared by the method has proper valence and morphology, a MnO2 mixed phase appears, more oxygen vacancies are generated, generation of free radicals in the activation process of peroxymonosulfate (PMS) is facilitated, PMS can be effectively activated to remove organic pollutants, and the activation efficiency of MnO2 on PMS and the operation stability of MnO2 in a packed column are greatly improved. Compared with a traditional method for adjusting the oxygen vacancy of MnO2, the method for loading the biochar is relatively controllable, simple in mode and low in cost.

The invention provides a method for treating discharge wastewater of a waste lithium battery, which comprises the following steps: S1, pulping a lithium cobalt oxide material by using discharge wastewater, and adding a first oxidant for reaction to obtain primary oxidized slurry; s2, mixing the primary oxidized slurry with high-grade matte nickel, and adding a second oxidizing agent for reaction to obtain secondary oxidized slurry; s3, the secondary oxidation slurry and an iron circulation activating agent are mixed for acid leaching, a liquid phase is taken after solid-liquid separation, and metal leaching liquid containing nickel and cobalt is obtained; wherein the first oxidizing agent comprises persulfate, the second oxidizing agent is selected from hydrogen peroxide, and the iron circulation activating agent is at least one of sodium hydrosulfite or sodium pyrosulfite. According to the method, short-range efficient selective recovery of valuable metals is realized through cooperation of lithium cobalt oxide and high nickel matte, the influence on the environment is greatly reduced, and the economic cost of the process is reduced.

The invention discloses a sustainable purification method based on nanobubbles, and relates to the technical field of water treatment. The sustainable purification method based on the nanobubbles comprises the following steps: preparing a nanobubble solution through a nanobubble generator; mixing the nano-bubble solution with hydrogen persulfate to activate the hydrogen persulfate, and promoting decomposition of the hydrogen persulfate on a nano-bubble interface to generate free sulfate radicals; the peroxydisulfate is used for water treatment and purification after being activated. By means of the innovative structural design and the utilization of the characteristics of the nano bubbles, the oxidative degradation efficiency is improved, meanwhile, the purification capacity can be kept as long as several months, low-energy-consumption, pollution-free and sustainable green environment restoration is achieved, and an efficient, environment-friendly and economical new way is provided for water pollution treatment.

The invention discloses a method for oxidation treatment of winery wastewater, and belongs to the technical field of environmental protection. The winery wastewater treatment method comprises the following steps: mixing winery wastewater and persulfate to form a reaction solution, and then carrying out ultrasonic cavitation treatment on the reaction solution to generate hydroxyl free radicals and persulfate free radicals. The treatment method disclosed by the invention has the advantages of simple process, high safety and low cost, and shows a good application prospect in the environmental protection fields such as winery wastewater treatment and similar wastewater treatment.

The invention relates to an in-situ dynamic soil and underground water arsenic pollution remediation technology based on an iron arsenate-based material. According to the technology, iron arsenate is generated in situ in a polluted area through the synergistic effect of innovatively designed slow-release ferrite capsules and oxidants such as persulfate, and efficient immobilization of arsenic is achieved. Meanwhile, the electrochemical regulation and control technology and an intelligent monitoring feedback system are fused, the underground water oxidation and reduction conditions are dynamically optimized, the remediation process is precisely regulated and controlled, and the method adapts to the complex polluted environment. The technology has the advantages of being efficient, economical, environmentally friendly, high in intelligent degree and the like, and arsenic pollution in soil and underground water can be effectively remedied.

The invention provides iron-manganese composite oxide modified biochar (FM-SBC) as well as a preparation method and application thereof, and relates to the technical field of modified biochar. The method comprises the following steps: drying, grinding, modifying, drying and pyrolyzing excess sludge of a secondary sedimentation tank of an urban sewage treatment plant, and modifying the excess sludge by using an iron-manganese composite oxide to obtain the iron-manganese composite oxide modified biochar. The iron-manganese composite oxide modified biochar can be used as an efficient catalyst of persulfate (PS), provides technical support for treatment of refractory organic wastewater by enhancing the catalytic effect and enhancing efficient degradation of refractory organic pollutants such as azo dyes, and is of great significance to sustainable development of the environment.

The invention belongs to the technical field of in-situ remediation of contaminated soil, and relates to an in-situ electric reinforced persulfate remediation method and device for heavy metal-organic matter combined contaminated soil. In the method, heavy metals in a soil medium are migrated out of a soil environment under the action of an electric field while the migration of persulfate is promoted by an electric technology, and the soil temperature is continuously increased by electric field heat along with the proceeding of an electric experiment, so that the activation of the persulfate is realized, and the degradation of pollutants is promoted; under the combined action of the electric field force and active substances generated by the persulfate, remediation of the heavy metal-organic matter combined contaminated soil is achieved. The problems that at the present stage, persulfate is short in migration distance in a soil medium and low in activation efficiency, and the remediation effect of heavy metal-organic matter combined contaminated soil is poor are solved, heavy metal-organic matter synchronous removal is achieved, meanwhile, electric field heat is utilized to the maximum extent, the defect of energy waste of an electric technology is overcome, and the application prospect is wide. And the removal efficiency of pollutants is effectively improved.

The present application relates to a kind of methods for removing heavy metal complex in wastewater, comprising the following steps, S1 configuration PMS composite reagent, the PMS composite reagent is made by including the following weight percentage of raw material ball milling, persulfate 50~90%, sulfite 5~30%, hypochlorite 5~20%;S2 in the heavy metal complex-containing industrial wastewater join the PMS composite reagent obtained in the S1, heavy metal in heavy metal complex is Cu, and one or several of Co, Cr, Ni, Pb and Zn, complex in heavy metal complex is one or several of EDTA, NTA, citric acid, oxalic acid, tartaric acid, sorbic acid, stirring is dissolved, and lye is added to maintain the pH of industrial wastewater to 9.5~11.0, and carries out fenton-like oxidation and breaks the complex reaction, after reaction, aftertreatment is obtained, and the regenerated water is obtained.The present application achieves the purpose of removing heavy metal complex in wastewater by the method of in-situ activation of persulfate without additional catalyst or the application of electricity, ultraviolet and other energy.

The present invention discloses a method for degrading organic pollutants by synergistic action of persulfate, ultrasound and stirring, which includes: S1, adjusting the pH of the wastewater containing organic pollutants to 3.00 - 10.60 and then adding persulfate, or adjusting the pH of the wastewater containing organic pollutants to 3.00 - 7.70 and then adding persulfate and metal ions, where the metal ions are one or more of Fe<supgt;3+< / supgt>, Cu<supgt;2+< / supgt>, Al<supgt;3+< / supgt>, Ag<supgt;+< / supgt>, Ni<supgt;2+< / supgt>, Mg<supgt;2+< / supgt>, Ca<supgt;2+< / supgt>, Co<supgt;2+< / supgt>; S2, placing the wastewater obtained in S1 in an ultrasonic device, performing ultrasound and simultaneously starting stirring under the condition that the ultrasonic temperature is 25 - 55 °C, and completing the degradation of the organic pollutants in the wastewater after 5 - 120 min of ultrasonic stirring treatment. The present invention has a significant enhancement effect on the degradation efficiency under the action of ultrasound and mechanical stirring, in synergistic action with persulfate, can strengthen the degradation technology, and can provide a reference for the field of industrial wastewater treatment.

The invention discloses a biomass doped incineration fly ash composite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing incineration fly ash and corncob biomass, adding an alkaline solution, stirring, filtering, washing to be neutral, drying, grinding and screening; and transferring the screened composite material into a tubular furnace for pyrolysis to obtain the biomass doped incineration fly ash composite catalyst. According to the prepared biomass-doped incineration fly ash composite catalyst, due to the introduction of the charcoal, the catalytic performance of the catalyst is improved, and meanwhile leaching of metal ions is reduced. In a persulfate system, the tetracycline removal agent shows relatively good anti-interference capability on tetracycline removal, keeps a removal rate of 90% or above when the pH value is in an alkaline range, and shows remarkable anti-interference capability on Cl <-> and other coexisting ions. In addition, a leaching experiment shows that the heavy metal leaching concentration of the catalyst in a reaction solution is far lower than the national emission standard.

The present invention provides a composition for remediating petroleum hydrocarbon-contaminated soil and its use. The composition comprises a peroxide, a persulfate, and a free radical initiator. By adding an initiator to a dual oxidant system comprising peroxide and persulfate, the use of catalysts and chelating agents can be avoided, resulting in a high degradation rate for petroleum hydrocarbons in the soil. It is believed that the addition of the initiator can stimulate the persulfate and calcium peroxide to generate active free radicals, generating SO4· ‑ They stimulate each other and work together to achieve the purpose of repairing soil contaminated by organic matter.

The application discloses a preparation method of a cobalt-based biochar composite material and application of the cobalt-based biochar composite material in persulfate oxidation, and comprises the following operation steps: a proper amount of sodium alginate is weighed, calcined, activated and dried to obtain a derived original biochar SA; after the SA is used as an adsorbent to adsorb cobalt ions, drying is performed to obtain a cobalt-containing biochar CoSA; the CoSA is uniformly ground with urea, pyrolysis is performed, washing, filtering and drying are performed, and vacuum drying is performed to obtain a cobalt-based biochar composite material CoNBC based on sodium alginate; and the activation method is that the SA is mixed with potassium hydroxide, ground in a jade mortar for 5-30 min, and then activated in ultrapure water for 1-8 h.The raw material used in the application is environment-friendly, the preparation process is simple, the cobalt-based biochar composite material obtained has excellent catalytic capacity for persulfate, can effectively control the precipitation of transition metals, reduces pollution, and greatly improves the utilization rate of metal elements.

The invention provides a low-consumption wet smelting process for flotation zinc oxide concentrate, which comprises the steps of pretreatment, low-acid leaching and post-treatment, and specifically comprises the following steps: adjusting the mass concentration of the raw material flotation zinc oxide concentrate to be 15-45%, adding an ultrasonic-synergistic stripping agent, and stirring uniformly; reacting for 5-45 minutes under an ultrasonic stirring condition to obtain ore pulp a; the ultrasonic-synergistic stripping agent is prepared from alkylbenzene sulfonate, octylphenol polyoxyethylene ether and persulfate; a decarburizing agent and a particle enhancer are added into the ore pulp a, the pH value is adjusted to 8.5-9.5, fine air is introduced for 5-10 min, and zinc oxide concentrate b is obtained through solid-liquid separation; waste electrolyte and / or waste acid are / is added into the zinc oxide concentrate b for a leaching reaction, and leaching liquid c is obtained; and the leaching solution c is subjected to neutralization iron removal and zinc powder replacement impurity removal, and then a zinc ingot is obtained.

The invention discloses a method for repairing organic compound contaminated soil by ball milling, which improves the repairing efficiency and comprises the following steps: (1) feeding the contaminated soil into a feeding machine; the feeding machine has a preliminary crushing function, and the contaminated soil is crushed into particles with the diameter smaller than 15 mm, so that follow-up ball milling is facilitated; (2) the contaminated soil is conveyed into a dry ball mill through a feeding machine, and first-stage ball milling is carried out; and (3) adding persulfate into the dry ball mill, and carrying out second-stage ball milling to degrade organic matters in the polluted soil, so that the polluted soil reaches the qualified standard.

The present invention discloses a BC-BiOBr-O V The invention discloses a preparation method of a nanocomposite material. The preparation method uses sawdust as raw material, H2SO4 solution as solvent, and adopts a calcination method to prepare BC; uses Bi(NO3)3·5H2O, BC and KBr as raw materials, and ethylene glycol as solvent, and then adopts a solvothermal method to combine biochar carbonized from sawdust with BiOBr rich in oxygen vacancies, thereby constructing BC-BiOBr-O with stable structure, large specific surface area, strong visible light response ability, high carrier separation efficiency and abundant catalytic active sites. V Nanocomposite materials, the obtained BC‑BiOBr‑O V Nanocomposites have the advantages of stable structure, large specific surface area, strong visible light response ability, high carrier separation efficiency and abundant catalytic active sites. They are expected to be used in the photocatalytic activation of persulfate (hereinafter referred to as PS) to degrade organic pollutants.

The invention discloses a method for preparing porous activated carbon based on pulse electrochemical activation, the porous activated carbon and application, and the method comprises the following steps: preparing a working electrode plate from carbon powder, and placing the working electrode plate in an electrolyte for pulse electrochemical square wave circulation treatment, wherein the electrolyte is an aqueous solution containing sulfuric acid, persulfate, sulfate and a cationic surfactant, stripping, cleaning and drying to obtain the porous activated carbon. According to the preparation method, the carbon powder is prepared into the working electrode plate, and the working electrode plate is subjected to pulse electrochemical square wave circulation treatment in the electrolyte containing the sulfuric acid, the persulfate, the sulfate and the cationic surface active agent, so that the porous activated carbon with large specific surface area, high electro-adsorption capacity and good conductivity can be prepared; when being used as a raw material for preparing a capacitive deionization electrode, the composite material shows good conductivity, high desalination capacity and high desalination rate, can be widely used for electro-adsorption desalination, and is high in use value and good in application prospect.

The invention provides a nickel-manganese oxide composite material, a preparation method and application, and belongs to the technical field of environmental functional materials and water pollution control, and the preparation method comprises the following steps: adding terephthalic acid, nickel nitrate hexahydrate and manganese chloride tetrahydrate into N, N-dimethylformamide, stirring and mixing, dropwise adding a NaOH solution, transferring into a high-pressure reaction kettle, carrying out a hydrothermal reaction, filtering, washing, and drying to obtain the nickel-manganese oxide composite material. After the reaction is completed, centrifugally washing a mixture in the inner container of the high-pressure reaction kettle, and drying in vacuum to obtain a NiMn-MOF material; and placing the NiMn-MOF in a porcelain boat, calcining, and naturally cooling to room temperature to obtain the nickel manganese oxide composite material. The nickel manganese oxide material prepared by the method shows excellent catalytic activation performance on persulfate, and can realize efficient and rapid degradation of bisphenol A.

The application discloses a kind of iron monatomic catalysts with controllable sulfur content and coordination mode and its preparation method and application, nitrogen-allyl thiourea and thiocyanic acid are respectively used as sulfur-containing organic ligand and sulfur-containing supramolecular precursor, chelate with iron ion, and use the hydrogen bond interaction between melamine and cyanuric acid, complete supramolecular self-assembly process;And high-temperature pyrolysis is carried out under argon atmosphere, and iron monatomic catalysts with controllable sulfur content and coordination mode can be prepared.The application also includes the application of iron monatomic catalysts with controllable sulfur content and coordination mode in removing organic pollutants such as p-chlorophenol and antibiotics in water.Iron monatomic catalysts with controllable sulfur content and coordination mode can improve the activation efficiency of persulfate, the content and selectivity of active oxygen species generated, and achieve efficient degradation of p-chlorophenol under different anion-cation, humic acid and pH conditions, while having good recycling performance.

This disclosure relates to a method for producing composite particles. The method comprises contacting catalyst particles, an oxidizing agent, and a plurality of monomers. The oxidizing agent is a peroxide, a persulfate, or ozone, and the catalyst particles are or comprise a material having Fenton or Fenton-like catalytic activity. The catalyst particles catalyze the disproportionation of the oxidizing agent to produce oxygen-radical species, which then initiate a polymerization reaction, thereby polymerizing the plurality of monomers, thereby forming a polymer shell around the catalyst particles. The present invention extends to composite particles produced by the method, an apparatus containing the composite particles, and the use thereof.

The invention discloses a carbon-based loaded bimetallic catalyst which is obtained by loading nano zero-valent iron and nano zero-valent palladium on biochar, and metal iron and palladium are sequentially loaded on the biochar according to a reaction sequence. The solid-phase catalyst is prepared by loading the nanoscale zero-valent bimetallic material on the surface of the biochar material with a certain particle size, and can be used for catalytic reduction degradation of halogenated organic matters in water; metal iron and palladium are sequentially loaded according to a reaction sequence, so that the problems of insufficient reduction of metal palladium and uneven loading caused by the fact that the two metals fight for adsorption sites are avoided, and the stability and reactivity of the composite catalytic material are improved; the porous structure of the biochar carbon-based material and the characteristic of rich organic functional groups on the surface are fully utilized, the metal loading capacity is increased, the contact sites of pollutants and the catalyst are greatly increased when halogenated organic pollutants are degraded, the degradation effect of halogenated organic matters in water is greatly improved, and the catalyst can also be used for catalyzing persulfate to oxidize organic matters.