91 results about "Peroxymonosulfuric acid" patented technology

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 discloses a zinc-sulfur co-doped ZIF-67 derivative composite material as well as a preparation method and application thereof, and belongs to the technical field of advanced oxidation. The composite material is prepared through a coordination-substitution-calcination integrated process. The preparation method comprises the following steps: firstly, mixing a cobalt source and an organic ligand in methanol, and introducing a sulfur source to form a cobalt-based precursor; and drying, grinding with a zinc source, and calcining in an inert atmosphere. According to the method, stable cobalt active sites are replaced by isocrystals of zinc, sulfur doping promotes cobalt and peroxymonosulfate to form a weak oxidizing intermediate, and efficient and high-selectivity degradation of organic pollutants is achieved under the condition that a strong free radical path is not needed. The material is stable in structure and high in water quality interference resistance, is suitable for catalyzing peroxymonosulfate to degrade organic pollutants in a water body, and particularly has remarkable advantages in a complex water body.

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 discloses a tetrathiomolybdate intercalated ternary iron-magnesium-zinc layered double hydroxide catalyst, a preparation method thereof and an application of the tetrathiomolybdate intercalated ternary iron-magnesium-zinc layered double hydroxide catalyst in degrading azo dyes by activating peroxymonosulfate. According to the method, a carbonate intercalated ternary LDH precursor is synthesized through a hydrothermal reaction, interlayer anions are replaced with nitrate and tetrathiomolybdate through ion exchange, and the target catalyst is obtained. In the catalyst, a unique Fe-Mg-Zn ternary metal laminate and a MoS < 2-> intercalation structure cooperatively construct a multi-active center, and MoS < 2-> is used as an electron donor to promote cyclic regeneration of Fe < 3 + > / Fe < 2 + >. The catalyst keeps ultrahigh activity in a wide range of pH (potential of hydrogen) of 3-9, can completely degrade 10 mg / L of acid orange 7 within 5 minutes, and is stable in structure and low in metal dissolution risk. The problems of low activity, slow Fe < 3 + > reduction, metal ion dissolution and the like under neutral and alkaline conditions in an advanced oxidation technology based on peroxymonosulfate are solved, and the method has important application value in the field of printing and dyeing wastewater treatment.

The invention relates to a silver-iron diatom modified carbon nitride (AgFe-CN) photocatalytic material capable of synchronously removing organic pollutants and pathogenic bacteria as well as a preparation method and application of the silver-iron diatom modified carbon nitride (AgFe-CN) photocatalytic material, and belongs to the field of environmental chemistry and material science. The catalyst is prepared through a supramolecular coordination-thermal polymerization method, wherein silver and iron are highly dispersed on a porous carbon nitride substrate in a monatomic form. The monatomic Ag and Fe synergistically construct an electron channel, and jointly endow the catalyst with excellent photocatalytic activity. The preparation method comprises the following steps: combining the catalyst with peroxymonosulfate (PMS) to construct an AgFe-CN / PMS / Vis photocatalytic Fenton-like synergistic system; in the system, the catalyst can lead generation of an advanced oxidation system which takes singlet oxygen as a main component and cooperates with superoxide free radicals and high-valence iron oxygen species, so that efficient and synchronous removal of various organic pollutants and pathogenic microorganisms in the water body is realized. The catalyst is simple in preparation process and mild in condition, and the constructed water treatment method is high in efficiency, high in universality and good in stability and has wide application prospects.

The application discloses a preparation method and application of nitrogen-doped oxygen-rich hierarchical porous carbon, and adopts a one-step co-activation method to prepare the nitrogen-doped oxygen-rich hierarchical porous carbon, which is simple in process and low in energy consumption. The structure and surface chemical performance of the prepared nitrogen-doped oxygen-rich hierarchical porous carbon catalyst are easy to control. The prepared TNS-X material has a large specific surface area and a developed pore structure, which is beneficial to exposure of catalytic sites and diffusion of reactants. Through ammonia and water vapor co-activation, efficient doping of nitrogen atoms and oxygen atoms is realized, the number of catalytic sites is increased, and the catalytic activity is improved. The TNS-800 material exhibits high catalytic performance in a peroxymonosulfate (PMS) activation process, and can completely remove organic pollutants such as acetylaminophenol in a short time.

The invention relates to the technical field of photocatalytic materials, in particular to a metal single atom loaded defect carbon nitride catalyst and a preparation method and application thereof. The method comprises the following steps: by taking melamine as a nitrogen source, soluble metal salt as a metal source and ethylenediaminetetraacetic acid as a chelating agent, carrying out freeze drying in a solvent system, calcining in a protective atmosphere, and carrying out thermal polymerization, so as to obtain the metal single atom loaded defective carbon nitride catalyst. The metal in the soluble metal salt is copper, iron or manganese. Precise anchoring and high dispersion of metal ions are achieved through complexing of ethylenediamine tetraacetic acid, a stable metal-N coordination structure is formed, metal agglomeration is avoided, a defect structure is constructed synchronously, and the metal monatomic loading capacity is 1 wt.%-7 wt.%. The catalyst can efficiently catalyze and activate peroxymonosulfate and rapidly degrade antibiotic pollutants such as tetracycline, has the advantages of being low in preparation cost, environmentally friendly, high in catalytic activity and high in stability, and is suitable for the field of water pollution remediation.

The invention discloses a method for catalytically degrading dye wastewater based on tetrahedrite. The method comprises the steps that tetrahedrite is subjected to mechanical activation and then mixed with peroxymonosulfate, the mixture is added into dye wastewater, the initial pH of a system is adjusted, a catalytic degradation reaction is carried out, tetrahedrite is recovered after the reaction is finished, and tetrahedrite is obtained. The mass molar ratio of tetrahedrite to peroxymonosulfate is (0.33-6): 1g / mmol; the mass ratio of tetrahedrite to organic residues in the dye wastewater is (10-80): 1. According to the method, active sites on the surface of tetrahedrite are used for adsorbing PMS molecules, PMS is activated through electron transfer to generate active free radicals, singlet oxygen in the active free radicals plays a main role, superoxide free radicals and sulfate free radicals play auxiliary roles, and therefore the catalytic activity and the degradation rate of organic matter in dye wastewater are greatly improved.

The application discloses an electrode material based on MOF@COF / BC and application thereof in wastewater treatment and belongs to the technical field of wastewater treatment. The electrode material is prepared by the following method: NH2-MIL101(Fe), melamine and phthalocyanine molybdenum are dissolved in dimethyl sulfoxide, reaction is carried out at 160-200 DEG C for 10-14 h, the precipitate is collected after reaction, and washing, drying are carried out to prepare NH2-MIL101(Fe)@Mel-MoPc; the biochar and NH2-MIL101(Fe)@Mel-MoPc are mixed in deionized water, ultrasonic treatment is carried out for 8-12 min, stirring is carried out for 10-14 h, then the precipitate is collected by centrifugation, and washing, drying are carried out to prepare the electrode material. The application develops and designs a novel electrode material, which is used for electrocatalytic activation of peroxymonosulfate to degrade OFX wastewater, and the degradation efficiency of the OFX wastewater is greatly improved.

The invention relates to silkworm cocoon-shaped zinc silicate nano-particles and a preparation method and application thereof, and the preparation method of the silkworm cocoon-shaped zinc silicate nano-particles comprises the following steps: preparing a zinc salt aqueous solution; mixing the zinc salt aqueous solution with the tetraethyl silicate solution, and adjusting the pH value to 7.0 to obtain a mixed solution; carrying out a reaction on the mixed solution in a hydrothermal reaction at a temperature of 180-200 DEG C for 12-18 h to obtain a precipitate; and washing and drying the precipitate to obtain the silkworm cocoon-shaped zinc silicate nanoparticles. The invention further provides the silkworm cocoon-shaped zinc silicate nano-particles prepared by the preparation method of the silkworm cocoon-shaped zinc silicate nano-particles and application of the silkworm cocoon-shaped zinc silicate nano-particle activated peroxymonosulfate in degradation of tetracycline antibiotics. The defects in antibiotic wastewater treatment in the prior art are overcome, the prepared silkworm cocoon-shaped zinc silicate nanoparticles provide efficient and stable catalytic performance for peroxymonosulfate, and efficient removal of tetracycline antibiotics is achieved.

The invention discloses a method for degrading benzo (alpha) pyrene in water by using gamma rays, belongs to the technical field of sewage treatment, and aims to solve the technical problem that the degradation efficiency and the degradation degree of the benzo (alpha) pyrene in the water by using the gamma rays in the prior art need to be further improved. An iron circulation-peroxymonosulfate composite system composed of a quaternized porous aromatic material, a sulfonated silicon-based hybrid channel material and a cross-linked beta-cyclodextrin material in a synergistic manner is constructed, and the quaternized porous aromatic material realizes stable enrichment of pollutants and peroxymonosulfate through a positive electricity interface; the sulfonated silicon-based hybrid channel material provides a continuous coordination and electron transfer environment for iron species, the cross-linked beta-cyclodextrin material performs confinement and secondary inclusion on hydrophobic pollutants and intermediates, and the sulfonated silicon-based hybrid channel material, the cross-linked beta-cyclodextrin material, the hydrophobic pollutants and the intermediates form a mutually linked reaction path in structure and function, so that construction and maintenance of a reaction micro-domain and continuous organization of the reaction path are realized, and the hydrophobic pollutants and the intermediates are subjected to continuous coordination and electron transfer. Therefore, the degradation efficiency and the cycling stability of pollutants are remarkably improved.

This invention provides a method for the degradation of bisphenol A (BPA) by persulfate activated by tea residue and iron filings. The method includes: freeze-drying and pulverizing tea residue to obtain coarse tea residue powder; sieving the coarse tea residue powder to obtain tea residue powder; mixing the tea residue powder with iron-containing substances to obtain an iron-containing tea residue mixture; adding the iron-containing tea residue mixture to a solution containing persulfate and BPA to initiate a chemical reaction; and measuring the BPA content to obtain the measurement results. This invention utilizes tea residue to replace pure tea polyphenols, constructing a persulfate degradation system activated by tea residue and iron filings, achieving a high-efficiency removal of 93.7% of BPA. This not only maintains the complexation and reduction advantages of tea polyphenols but also realizes the resource utilization of waste. It provides a low-cost, green, and sustainable technical path for BPA pollution control, with significant environmental and economic benefits.

Various formulations of a disinfectant are disclosed. The disinfectant includes an amount of potassium peroxymonosulfate, at least one organic acid, and at least one surfactant. The disclosed disinfectant can exist in both powder form and liquid form, and can also be in kit form having a variety of form factors. These disinfectant formulations offer higher efficacy and lower toxicity when compared with disinfectants known in the art, and when compared with potassium peroxymonosulfate alone.

The invention belongs to the technical field of sewage treatment, and particularly relates to preparation of an iron-carbon material-persulfate composition and application of the iron-carbon material-persulfate composition to degradation of perfluorooctanoic acid in a water body. The iron-carbon material-persulfate composition provided by the invention comprises an iron-carbon material and peroxymonosulfate, the iron-carbon material comprises a carbon material and vulcanized nano zero-valent iron loaded on the carbon material; the mass ratio of the iron-carbon material to the peroxymonosulfate is (0.1-2): (0.1-2). The method for degrading the perfluorooctanoic acid in the water body, provided by the invention, comprises the following steps: putting an iron-carbon material-persulfate composition into the water body containing the perfluorooctanoic acid, and degrading the perfluorooctanoic acid in the water body. According to the degradation method provided by the invention, the iron-carbon material and the peroxymonosulfate are utilized to generate a synergistic effect, the degradation effect on the PFOA in the water body under the environment concentration is good, the method has practical application value, secondary pollution is not caused in the degradation process, and the method is an effective method for removing the PFOA.

The invention discloses modified biochar, a preparation method and application of the modified biochar in organic wastewater treatment, and belongs to the technical field of material preparation. Microalgae powder, thiourea and sodium bicarbonate are modified by a one-step complete mixing method, then low-temperature drying is performed, and the algae-based biochar is prepared through carbonization in an oxygen-free high-temperature environment. The prepared modified biochar can activate a peroxymonosulfate system to rapidly degrade tetracycline pollutants in sewage, and the removal rate of the tetracycline pollutants within 40 min can reach 94% or above. The preparation method and the pollutant removal process are simple in step, efficient in performance and free of additional active metal addition, secondary pollution is avoided, good economic and environmental benefits are achieved, and the actual application value is outstanding.

The invention discloses sludge biochar as well as a preparation method and application thereof, and belongs to the technical field of sludge resource utilization. According to the method, the excess sludge of a municipal sewage treatment plant is used as a raw material, efficient sludge dehydration is achieved through gravity concentration, ferric chloride-thiourea combined chemical conditioning and a filter pressing technology, obtained dehydrated sludge cakes are subjected to high-temperature pyrolysis in an inert atmosphere through a tubular furnace, and the sludge biochar material is prepared. The prepared sludge biochar is used for an advanced oxidation system activated by peroxymonosulfate so as to efficiently degrade organic pollutants. According to the method, the raw materials are easy to obtain, the process is simple and convenient, the sludge dewatering performance is remarkably improved, reduction, harmlessness and resource utilization of the sludge are achieved, environmental, social and economic benefits are considered, and a novel technical path is provided for collaborative treatment of the sludge.

The application discloses a phosphate-enhanced cobalt monatomic catalyst system and application thereof in removal of halogenated pollutants. The phosphate-enhanced cobalt monatomic catalyst system comprises a cobalt-based monatomic catalyst with a Co-N2O2 coordination structure, a peroxymonosulfate and a phosphate. The phosphate-enhanced cobalt monatomic catalyst system is used for the first time, in which the phosphate is used as a synergistic component instead of an inhibiting factor, and is combined with the cobalt-based monatomic catalyst and the peroxymonosulfate, so that the degradation efficiency of the halogenated pollutants is remarkably improved.

The application provides a construction process for ex-situ chemical oxidation remediation of high-viscosity organic contaminated soil, and comprises the following steps: adding quicklime and inorganic porous structure material into the organic contaminant, crushing and screening after mixing and stirring; adding biochar, crushing and screening after mixing and stirring again; spreading the product obtained in the previous step, and turning and stirring; adding humic acid, organic waste mixture and peroxymonosulfate into the mixture after the previous step, and mixing and stirring uniformly; and curing under natural conditions. The application solves the problem of high viscosity and high water content of the organic contaminated soil by controlling the adding sequence of different reagents, reduces the water content of the clay soil, makes the clay soil loose, and makes the organic contaminant in the clay soil be oxidized by the oxidation reagent, so that the remediation effect is achieved.

The invention belongs to the technical field of sewage and wastewater treatment, and particularly relates to a photo-Fenton-like self-adaptive catalyst for laterally activating peroxymonosulfate as well as a preparation method and application of the photo-Fenton-like self-adaptive catalyst. The Cu-doped Zn3In2S6 photocatalyst with an asymmetric active center is constructed, and a lateral photo-Fenton reaction is triggered through polarization charge transfer and self-adaptive sulfur vacancy, so that peroxymonosulfate (PMS) is efficiently activated, and efficient degradation of novel pollutants (such as tetracycline and the like) is realized. Specifically, self-adaptive sulfur vacancies generated by Cu doping induction are utilized to form asymmetric active sites, the sites can realize lateral adsorption activation of the PMS and change the activation path of the PMS, and meanwhile, the activation efficiency of the PMS is enhanced through polarization charge transfer, so that the generation amount of reactive oxygen species (ROS) is remarkably increased, the efficiency of photo-Fenton reaction is improved, and the catalytic activity of the photo-Fenton reaction is improved. Broad-spectrum applicability to various pollutants is shown, the dissolution amount of Cu ions in practical application is lower than the national standard (1t, 1.0 mg / L), and the application potential is huge.

An oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst and preparation method thereof and application thereof in removing sulfadiazine in water body The heterojunction catalyst takes molybdenum oxide (MoO 3‑x ) as a base material, and MoS2 is in-situ grown on MoO 3‑x , and the mass fraction of MoS2 in the heterojunction catalyst is 10-25%. The catalytic material adopted in the application promotes the transfer of charges through the formation of a heterojunction and surface oxygen vacancies, thereby realizing excellent sulfadiazine removal performance. The oxygen-enriched vacancy MoO 3‑x @MoS2 heterojunction catalyst photocatalytic activation of peroxymonosulfate for removing sulfadiazine in water body has the advantages of simple operation, low cost, wide pH application range, strong anti-interference ability, stable catalytic performance, high sulfadiazine removal efficiency, etc., and has a good application prospect for sulfadiazine wastewater treatment.

The invention discloses a Fe-N-C monatomic catalyst with an adjustable pyrrole nitrogen ratio as well as a preparation method and application of the Fe-N-C monatomic catalyst. According to the catalyst, ZIF-8 serves as a precursor, and accurate regulation and control of the proportion of pyrrole nitrogen in the Fe-N-C catalyst are achieved by regulating and controlling the proportion of 1, 10-phenanthroline and 2-methylimidazole in the precursor. By introducing a proper amount of pyrrole nitrogen, the electron density of a Fe active center can be enhanced through a strong electron donating effect of the pyrrole nitrogen, and a strong polarization electric field is induced to be formed, so that the adsorption and activation capability on peroxymonosulfate is remarkably improved, a non-free radical path dominated by singlet oxygen is promoted, and the removal rate of emerging pollutants such as sulfamethoxazole in 30 min exceeds 97%. According to the invention, collaborative optimization of catalytic activity and structural stability is realized, and the catalyst shows excellent catalytic performance and cycling stability in a wide pH range and in an actual water body, and has important actual application value.

The invention discloses a preparation method and application of a porous core-shell iron-nitrogen-carbon catalyst, and belongs to the technical field of advanced oxidation water treatment.According to the method, the catalyst is prepared by combining metal organic framework coordination pre-assembly with high-temperature pyrolysis, and a core-shell structure with an iron cluster coated with a nitrogen-doped carbon layer is formed; the structure can effectively inhibit the dissolution of iron ions, improve the dispersity of active sites, and significantly enhance the performance of the catalyst for activating peroxymonosulfate (PMS) through the electron transfer effect from the shell layer to the core part. Compared with the prior art, the preparation method disclosed by the invention is simple, low in cost and environment-friendly, and the obtained catalyst can efficiently activate PMS to degrade refractory organic pollutants in water without additional energy.

The invention provides a selective lithium extraction method for maintaining an olivine structure in a raw material containing lithium manganese iron phosphate, and relates to the technical field of chemical metallurgy, the selective lithium extraction method comprises the following steps: (1) mixing a raw material containing LiMnxFe (1-x) PO4, a solvent and an oxidizing agent to obtain mixed slurry; wherein 0 < x < = 0.85; the oxidizing agent is selected from any one or a combination of at least two of potassium permanganate, a peroxymonosulfate-containing compound and a peroxydisulfate-containing compound; (2) carrying out stirring reaction on the mixed slurry obtained in the step (1) to leach out lithium, so as to obtain a reacted material; wherein the lithium manganese iron phosphate keeps an olivine structure in the stirring reaction. The method provided by the invention realizes the target of selective lithium extraction, and has the advantages of small acid-base loss, low energy consumption, good product quality and good application prospect.

The application discloses a magnesium-doped cobalt-nitrogen co-modified biochar composite material and a preparation method and application thereof, and belongs to the technical field of sewage treatment. The preparation method comprises the following steps: pyrolyzing agricultural waste under an inert atmosphere to obtain biochar; and through an impregnation-pyrolysis process, soluble cobalt salt, magnesium salt and a nitrogen source are combined with the biochar to obtain the magnesium-doped cobalt-nitrogen co-modified biochar composite material. According to the application, the electronic structure of cobalt is regulated through magnesium doping, and a stable Co-N x and Mg-O-Co interface is formed by combining nitrogen coordination, so that the activation capacity of the composite material on peroxymonosulfate is enhanced. When the material activates peroxymonosulfate, thiamethoxam is efficiently degraded through a free radical and non-free radical synergistic path, and the material has the advantages of low metal ion leaching rate, wide pH adaptation range, strong anti-interference capacity and the like, and exhibits excellent degradation performance on neonicotinoid insecticides such as thiamethoxam in a complex water environment.

The invention discloses a cavity confinement carbon-based iron monatomic catalytic material as well as a preparation method and application thereof. According to the material, a soft and hard template cooperation strategy is adopted, a hollow mesoporous carbon sphere is used as a carrier to anchor atomic-scale dispersion iron sites, and a nanoreactor with a cavity confinement structure is constructed. Compared with a traditional material, the activation efficiency of the material on peroxymonosulfate (PMS) is improved by about 2.9 times, the degradation performance on phenolic pollutants is remarkably enhanced, and the strengthening effect of a confinement structure on mass transfer and reaction kinetics is verified. Through metal-carrier cooperative regulation and control, singlet oxygen (O) is preferentially generated through the reaction, selective oxidation of organic pollutants is achieved through a non-free-radical path, and the anti-interference capacity in complex water is improved. The method is simple in process and relatively low in cost, and the obtained solid catalyst is easy to separate and recover, is suitable for efficient deep treatment of refractory organic pollutants in rural domestic sewage and industrial wastewater, and has a good application prospect.

The invention belongs to the technical field of environmental pollution remediation, and particularly relates to application of a Bi2WO6 / CuBi2O4 composite material in ultrasonic catalytic degradation of antibiotics in wastewater. The Bi2WO6 / CuBi2O4 composite material is prepared from the following components in percentage by mass: 10 percent to 100 percent of Bi2WO6. The Bi2WO6 / CuBi2O4 composite material prepared by the invention combines ultrasonic and peroxymonosulfate (PMS) to degrade tetracycline in water, and when the ultrasonic power is 500W and the ultrasonic time is 5min, the degradation rate of tetracycline in water can reach 95.67 (+ / -0.28)%.

The present application relates to the field of catalytic composite material, and specifically discloses a composite material for assisting degradation of dye wastewater, and a preparation method and application thereof.The present application takes hydrotalcite and lanthanum salt as the main body, and utilizes the composite of hydrotalcite and lanthanum salt with p-n heterojunction structure prepared by the coprecipitation method.The composite material can assist peroxymonosulfate to oxidatively degrade harmful substances in azo dye wastewater, improve the degradation efficiency of peroxymonosulfate, and the composite material has stable catalytic performance, is simple to use, and can be reused, thereby greatly saving the cost of degrading dye wastewater.The present application effectively solves the problems of unstable catalyst performance, greatly reduced catalytic activity after 2-3 times of use, and increased cost of degrading dye wastewater and complicated operation in the prior art of using photocatalysts to assist peroxymonosulfate to degrade dye wastewater.

This invention discloses a method and system for the synergistic degradation of COD and new pollutants in industrial wastewater based on catalytic reduction-oxidation. The method includes: adjusting the pH of dyeing and printing wastewater containing perfluorinated compounds (PFCs) to alkaline; adding a reducing agent (sulfite) and a catalyst (alkali metal iodide); then carrying out a catalytic reaction under ultraviolet light irradiation and stirring; adding an oxidizing agent (persulfate PMS) and a catalyst (ferrous sulfate) to the effluent after catalytic reduction; and carrying out a catalytic oxidation reaction under light-proof and stirring conditions. The ferrous sulfate activates the PMS to generate sulfate radicals, completely mineralizing the short-chain fluorine-containing intermediates generated in the reduction stage into CO2 and F. ‑ Simultaneously, it degrades residual organic matter. The method of this invention can efficiently and thoroughly degrade perfluorinated compounds in actual dyeing and printing wastewater, and has strong anti-interference ability, low operating cost, and no secondary pollution.

The application discloses a bubble-assisted benzalkonium chloride heterogeneous Fenton-like catalytic degradation method and belongs to the technical field of water treatment in environmental engineering. The method uses ferric nitrate, cobalt chloride, lanthanum nitrate and biochar as raw materials, synthesizes BC / LaFeCo-LDH through a hydrothermal method, uses the BC / LaFeCo-LDH as a heterogeneous Fenton-like catalyst, and is used for activating peroxymonosulfate. Meanwhile, a solid-liquid-gas heterogeneous Fenton-like catalytic system is constructed in combination with a hydrodynamic cavitation reactor. In the system, the exposure degree of benzalkonium chloride is increased by virtue of the bidirectional action of hydrophobic bubbles and the surface of hydrophilic catalysts, the activation rate of peroxymonosulfate is significantly improved, a large amount of singlet oxygen is generated, and the degradation efficiency and reaction rate of benzalkonium chloride are effectively improved. The method provides an effective way for green and efficient degradation of benzalkonium chloride.