46 results about "Fenton reagent" patented technology

The invention discloses a resource utilization method of Fenton iron mud. According to the method, a citric acid-ascorbic acid composite solution is used for soaking Fenton iron mud, hydrothermal liquefaction is carried out in an inert reduction system, ferric iron is reduced into ferrous iron, and a ferrous iron solution generated after reaction can directly form a Fenton reagent with hydrogen peroxide to be reused for Fenton reaction. By the adoption of the method, iron can be completely recycled, resource utilization of the Fenton iron mud is facilitated, the mass of the treated filter residues is only 1 / 10 of that of the iron mud, and the disposal amount of hazardous waste is effectively reduced.

The invention relates to the technical field of wastewater treatment, and discloses an efficient and environment-friendly photo-Fenton oxidation wastewater treatment method which comprises the following steps: performing primary treatment on wastewater through a water inlet and pretreatment unit to remove large-particle impurities; a flocculating agent is added through the flocculation treatment unit to further remove suspended solids; organic matters are efficiently degraded by utilizing ultraviolet light catalysis and a Fenton reagent through the photo-Fenton reaction unit; solid-liquid separation is realized through the separation and drainage unit, and wastewater is discharged after reaching the standard; system operation parameters are monitored in real time and automatically adjusted through the monitoring and control unit, and the treatment effect is ensured; large-recycle-ratio operation is achieved through the recycle-ratio control unit, the reaction efficiency is improved, and consumption of chemical reagents is reduced. According to the method, ultraviolet light catalysis and Fenton reaction are combined, efficient degradation of refractory organics in the wastewater is achieved, and meanwhile through the intelligent control and cyclic utilization technology, the treatment efficiency is improved, and the operation cost is reduced.

The invention provides a method for preparing fulvic acid through Fenton oxidation, and belongs to the technical field of fulvic acid preparation. The preparation method comprises the following steps: firstly, mixing a biomass raw material with water, and performing hydrothermal treatment to obtain a solid-liquid mixture; adding a Fenton reagent into the solid-liquid mixture, and then sequentially carrying out oxidation treatment, alkaline extraction and acidic precipitation to obtain a crude fulvic acid solution; and finally, purifying the crude fulvic acid solution to obtain the fulvic acid. According to the method, firstly, the biomass raw material is subjected to hydrothermal treatment, the hydrothermal treatment product is subjected to Fenton oxidation, hydroxyl free radicals (. OH) generated by a Fenton reagent effectively destroy C-C bonds and C-O bonds in the biomass structure, continuous decomposition and conversion of the hydrothermal product can be effectively promoted, generation of the target product fulvic acid is facilitated, the reaction time is shortened, and the yield is increased. And the production efficiency is improved.

The application discloses a method for recovering nickel and phosphorus from electroless nickel plating waste liquid, and the method comprises the following steps: preparing nickel sulfate through extraction and stripping, and preparing iron phosphate through Fenton oxidation and precipitation; compared with the prior art, the method is characterized in that the waste liquid is pretreated, insoluble solid particles in the waste liquid are removed, emulsification of an extractant caused by particles in a subsequent extraction process is prevented, damage to extraction oil is avoided, and the extraction efficiency is ensured; in addition, the extractant used in the method can be recycled, secondary pollution is avoided, and the method is economical and practical; in the method, main pollutants in waste water are all converted into important chemical raw materials, recycling is realized, sulfuric acid and Fenton reagents used are all converted into terminal products, difficulty of end waste water treatment is not increased, clean production is met, the treatment cost is low, the product has high added value, and the method has strong practicability.

The invention discloses a gradient digestion, extraction and detection method for microplastics in plant tissues, and belongs to the technical field of plant pollutant detection. The core of the method is that a hydrogen peroxide-based primary digestion solution, a cellulase and pectinase compounded tissue digestion solution and a residual digestion solution composed of a Fenton reagent and sodium bromide are sequentially adopted to perform three-stage digestion on a plant sample under a mild acidic condition so as to thoroughly remove organic matters and completely retain micro-plastics. After digestion, micro-plastics are extracted through filtration, ultrasonic enrichment and concentration, and finally accurate qualitation and quantification are carried out through thermal cracking-gas chromatography / mass spectrometry. The invention synchronously protects the special digestion solution composition and the kit for realizing the method. According to the scheme, the contradiction between incomplete removal of organic matters and damage of a micro-plastic structure in a traditional digestion technology is effectively solved, the unification of efficient impurity removal (gt, 90%) and high recovery rate (greater than or equal to 85%) is realized, and the accuracy and reliability of detection are remarkably improved.

The invention relates to the technical field of beneficiation reagent wastewater purification, and particularly discloses beneficiation reagent wastewater purification equipment which comprises a base plate, a supporting frame is fixedly connected to the top of the base plate, a filtering device is fixedly connected to the top of the supporting frame, and the pollution discharge end of the filtering device communicates with a first pollution discharge pipe. The end, away from the filtering device, of the first blow-off pipe communicates with a mud pump, the outlet end of the mud pump communicates with a second blow-off pipe, the side, away from the mud pump, of the top of the base plate is fixedly connected with a heat utilization device, and the side, away from the heat utilization device, of the top of the base plate is fixedly connected with a heating device. A Fenton reagent cleaning box is fixedly connected to the side, away from the heating device, of the top of the base plate, and the outlet end of the Fenton reagent cleaning box communicates with a third water outlet pipe. According to the beneficiation reagent wastewater purification equipment, the purposes of recycling waste heat in wastewater, improving the energy utilization efficiency and further improving the overall wastewater purification effect are achieved.

The application discloses a kind of plate and frame hot water feeding squeezing process, it is related to sludge treatment process, comprising the following steps: S1, sludge is mixed with modified fenton reagent and is handled, and the conditioning sludge is obtained;S2, the conditioning sludge is put into plate and frame filter press;S3, hot water is injected into the plate and frame filter cavity of plate and frame filter press;S4, water is injected to plate and frame diaphragm filter plate, and the diaphragm squeezing dewatering of conditioning sludge is carried out, and the discharge is completed.The application has the effect of reducing the moisture content of sludge.

The embodiment of the application discloses a flotation reagent preparation method, a flotation reagent and a flotation method of a rare earth ore. The flotation reagent preparation method is characterized in that the method comprises the following steps: mixing a plurality of flotation reagents to obtain a mixed fatty acid collector; adding a sodium hydroxide solution to the mixed fatty acid collector to obtain a collector solution; and electrolyzing the collector solution and oxidizing the collector solution to make the collector solution generate nanobubbles and hydroxyl radicals, thereby obtaining a flotation reagent. The flotation reagent preparation method can simultaneously realize dispersion activation and in-situ oxidation modification of the fatty acid collector, can generate hydroxyl radicals without additional addition of a Fenton reagent, and can avoid problems such as impurity pollution of ore slurry and unstable oxidation effect caused by an exogenous reagent.

The present application relates to wastewater treatment technical field, specifically to a kind of rotating heterogeneous fenton oxidation reaction device and wastewater treatment method, the device includes space three-dimensional metal framework and water distributor, space three-dimensional metal framework inside is equipped with cavity, at least including 1 metal ring, metal ring includes 2 metal sheets and catalyst filled between 2 metal sheets;Each metal sheet is equipped with several holes that pass through the metal sheet;Water outlet of water distributor is set in the cavity inside space three-dimensional metal framework.This device can strengthen the micro-contact area of organic matter in wastewater and fenton reagent, and make mixed solution and catalyst fully contact, increase the contact time of reactants, can increase the rate of heterogeneous fenton reaction transmission and mixing reaction process by 1-3 times, can greatly shorten the mixing reaction time, also can improve the utilization efficiency of catalyst, to reduce the amount of chemical reagent used, while the equipment cost is less, energy consumption is low, and the floor space is also small.

The present invention belongs to the field of Fenton reagents and wastewater treatment, specifically relating to a composite photo-Fenton catalyst for in-situ H₂O₂ supply, a preparation method, and its application in wastewater treatment. The composite photo-Fenton catalyst disclosed in the present invention comprises glucose oxidase immobilized on a mesoporous Fe-g-C₃N₄ carrier, wherein the mesopores of the Fe-g-C₃N₄ carrier have a pore size of 10 to 30 nm; the molecular weight of the glucose oxidase is 300 to 3000. The composite photo-Fenton catalyst Fe‑g‑C3N4 / GOD of the present invention can catalyze glucose in wastewater to produce H2O2 in situ for photo-Fenton degradation under light conditions. It not only has high photocatalytic degradation efficiency, but also maintains high catalytic activity in a wide pH (3-11) and temperature (20°C-50°C) range. It is suitable for treating a wide range of wastewater types and has low pretreatment requirements for wastewater, without the need for additional H2O2 addition. Less sludge is generated after sewage treatment, and Fe‑g‑C3N4 / GOD is easy to recycle and reuse, greatly reducing the cost of sewage treatment by traditional Fenton methods.

The present application relates to wastewater treatment technical field, specifically to a kind of heterogeneous fenton oxidation reaction device and wastewater treatment method;The device includes spatial three-dimensional metal framework, spatial three-dimensional metal framework inside is equipped with cavity, at least including one metal ring, metal ring is equipped with several holes passing through the metal ring, the component of metal ring includes single metal and / or metal oxide with catalytic effect;It also includes water distributor, the water outlet of water distributor is arranged in the cavity inside the spatial three-dimensional metal framework.The device can strengthen the micro-contact area of organic matter in wastewater and fenton reagent, and make mixed liquid and metal ring fully contact, increase the contact time of reactants, the rate of transmission and mixing reaction process can be increased by 1-3 times, the material mixing and reaction time is greatly shortened, energy consumption is reduced, reagent dosage is saved, the utilization efficiency of reagent is improved, catalyst catalytic efficiency, and the advantages of small floor space.

The invention discloses a process for treating organic wastewater in a chemical park, and belongs to the technical field of wastewater treatment. The process comprises the following steps: adjusting the pH value of pretreated wastewater to 3-4, pumping the pretreated wastewater into a Fenton reaction tank, adding H2O2 and an iron-based Fenton reagent into the Fenton reaction tank, and allowing the pretreated wastewater to remain in the Fenton reaction tank for 0.5-1.2 hours under light conditions; then, effluent from the Fenton reaction tank enters a degassing and neutralization tank, is stirred to remove oxygen generated by the Fenton reaction, and is transported to a second regulating tank through a water pump, wherein the pH value is adjusted to 7-8, a precipitant is added, and the pretreatment is stirred for 30 minutes, followed by static precipitation for 2-4 hours, and a supernatant is separated; and the supernatant is subjected to ultrafiltration. The process effectively removes organic pollutants and heavy metal pollutants in the organic wastewater in the chemical park through the combined process of "pretreatment+Fenton oxidation+coagulation precipitation+ultrafiltration", and the effluent meets the pollutant emission standard of a municipal sewage treatment plant, wherein the COD removal rate is above 96%.

The present application relates to sewage treatment technical field, especially to a kind of sewage treatment method and sewage treatment system based on upflow stirring mode high-efficiency saving reagent for effluent after biochemical treatment, utilize packing in system large circulation and carry out pollutant enrichment, improve local pollutant concentration, promote the chain reaction of advanced oxidation;Using ferrous sulfate pre-adding method improves local ferrous concentration, enhances ferrous catalytic ability, promotes reagent mixing by upflow mixing method, reduces waste reagent caused by effluent hydrogen peroxide residue, while treating the pollutant adsorbed by packing, regenerate packing, finally achieve the purpose of reducing fenton reagent dosage, suitable for treating various biochemical tail water.

The invention discloses a method for deep oxidation and digestion of wastewater containing metallic paint, which belongs to the technical field of wastewater treatment. The method comprises the following steps: a first step of adjusting the pH of the wastewater containing metallic paint with a 10% by mass hydrochloric acid solution, then adding a Fenton reagent to adjust the system to neutrality, thereby obtaining oxidized wastewater; a second step of adding a water treatment agent to the oxidized wastewater, stirring the wastewater at a speed of 100-200 r / min for 3-5 minutes under light, allowing the wastewater to settle for 1-1.5 hours, and performing sand filtration to complete the treatment; and a dual oxidation treatment of Fenton oxidation and treatment with the water treatment agent is performed to achieve deep treatment, thereby achieving good treatment effect on the wastewater containing metallic paint. When the water treatment agent acts on the wastewater, the residual organic matter can be treated by modifying the photocatalytic performance of the carrier, and the introduced quaternary ammonium salt cations can flocculate pollutant particles by electrostatic adsorption, thereby improving the treatment effect.

This invention proposes a Fenton reagent, a polishing slurry, a polishing method for diamond substrates, and a diamond polishing sheet. The invention provides a Fenton reagent comprising a hydrogen peroxide solution and a ferrous salt-containing composition; the ferrous salt-containing composition comprises: a ferrous salt, a host molecule, and a guest molecule; the host molecule has a hydrophobic cavity structure, capable of encapsulating the guest molecule through non-covalent interactions, and exhibits chemical stability in the Fenton reaction system; the guest molecule has a conjugated π system and can coordinate with Fe. Using the Fenton reagent and abrasive particles of this invention as a polishing slurry, diamond is polished under visible light irradiation, ensuring that the Fe content in the polishing slurry is maintained. 2+ A stable concentration ensures a stable supply of hydroxyl radicals, resulting in a high-quality diamond surface.

The present disclosure relates to a metal-containing ZSM-5 molecular sieve and a preparation method and application thereof, the method comprising: S1, mixing a silicon source, an aluminum source, an alkali source, seeds and water to obtain a first mixture; S2, mixing an active metal source, a peroxide, water and the first mixture and then performing a hydrothermal reaction; wherein the peroxide is selected from one or more of sodium persulfate, hydrogen peroxide and Fenton reagent; and the metal in the active metal source is one or more of nickel, copper, zinc, manganese, lanthanum and cerium. The method of the present disclosure uses a peroxide to synthesize a molecular sieve without using a template containing amine nitrogen, thereby avoiding amine nitrogen wastewater discharge, achieving clean production of the metal-containing ZSM-5 molecular sieve, and enabling preparation of a ZSM-5 molecular sieve having an active metal component distributed in the molecular sieve channel, which, when used in a diesel catalytic cracking reaction, has a relatively optimal yield of low-carbon olefins.

The application discloses an inorganic shielding agent for eliminating the influence of residual flocculants in machine-made sand on the workability of concrete and an application method thereof. The inorganic shielding agent is composed of hydrogen peroxide and ferrous salt. In the mixing process of concrete or mortar, the shielding agent is added into mixing water, polycarboxylic acid water reducing agent and other raw materials, and hydroxyl radicals generated by Fenton reagent are used to rapidly degrade residual polyacrylamide (PAM) in machine-made sand by using the mixing and time provided by the mixing process, so that the competitive adsorption and tackifying effect of the residual PAM on the polycarboxylic acid water reducing agent are eliminated, and the workability of the concrete is restored. The application has the advantages of high efficiency, rapidness, low cost and simple operation, and the reaction product is harmless to the environment, and is suitable for large-scale industrial application.

The invention relates to the technical field of electro-Fenton catalytic membranes and organic polluted wastewater treatment, in particular to a preparation method and application of a derived goethite electro-Fenton catalytic membrane. An electro-Fenton catalyst with carbon nanotubes (CNTs) as a functional substrate is loaded on a polytetrafluoroethylene basement membrane, oxygen is subjected to an oxygen reduction reaction on the substrate CNTs to generate H2O2, the H2O2 and lattice iron (equivalent to Fe) in goethite alpha-FeO (OH) derived by a hydrothermal method form a'Fenton reagent ', and a Fenton reaction is further carried out to generate hydroxyl free radicals with strong oxidizing property. The prepared derivative goethite electro-Fenton catalytic membrane is stable in structure, alpha-FeO (OH) is not prone to falling off, iron ions are not prone to being leached out, the contact efficiency of pollutants and strong oxidizing free radicals is effectively improved in a circulation flow operation system, and efficient mineralization detoxification of the pollutants is achieved. The electro-Fenton catalytic membrane disclosed by the invention is simple in preparation process, and can realize energy-saving and efficient wastewater purification in the application of pollutant degradation.

The application discloses a medicament and a method and system for treating the odor of oil and gas field acidification wastewater, and the medicament for treating the odor of oil and gas field acidification wastewater comprises sodium persulfate, hydrogen peroxide and ferrous sulfate, wherein the molar ratio of the sodium persulfate to the hydrogen peroxide is greater than or equal to 10:1, and the molar ratio of the sodium persulfate to the ferrous sulfate is greater than or equal to 2:1. The application adds two closed tank bodies as oxidation reaction kettles between a gas-liquid separator and a waste liquid pool, the two closed tank bodies are respectively used for adding Fenton reagent for primary oxidation treatment and adding the medicament for secondary oxidation treatment, different oxidation processes are selected according to the detection result of the odor concentration of the oil and gas field acidification wastewater, the odor content in the oil and gas field acidification wastewater is reduced, the application can not only effectively reduce the odor concentration in the oil and gas field acidification wastewater, but also can avoid odor overflow in the conveying process.

The present invention relates to a method for treating wastewater containing amantadine hydrochloride based on the Fenton method, belonging to the technical field of water treatment. The method for treating wastewater containing amantadine hydrochloride based on the Fenton method comprises the following steps: obtaining a Fenton-like reagent; adding the Fenton-like reagent to the wastewater containing amantadine hydrochloride for oxidative degradation to obtain the treated wastewater; wherein, the Fenton-like reagent is composed of an iron-manganese bimetallic ion complex and hydrogen peroxide; the iron-manganese bimetallic ion complex is prepared by hydrothermal treatment using a divalent iron salt, a divalent manganese salt, a fluorine-containing imidazolium salt ionic liquid compound and a carrier material. By using a specific Fenton-like reagent to oxidatively degrade the wastewater containing amantadine hydrochloride, the present invention significantly improves the oxidative degradation efficiency and oxidative degradation ability of the amantadine wastewater, providing a new means for the treatment of amantadine wastewater.

The invention relates to a treatment method of nitrate wastewater. The composite carbon source obtained by resourceful treatment of the water-based cutting waste liquid is used for carrying out nitrate wastewater treatment. The resourceful treatment method comprises the following steps: (1) carrying out acid precipitation treatment on the water-based cutting waste liquid, and standing; (2) reacting the lower-layer treating fluid obtained by standing in the step (1) under the action of a Fenton reagent, standing and filtering; (3) mixing the filtrate obtained by filtering in the step (2) with a nitrogen source and a phosphorus source to obtain a mixed solution, and performing hydrolytic acidification treatment to obtain a composite carbon source; and (4) mixing the composite carbon source obtained in the step (3) with nitrate wastewater to obtain a second mixed solution, and then carrying out denitrification treatment. The harmful water-based cutting waste liquid with high toxicity, high CODCr (Chemical Oxygen Demand) and poor biodegradability is recycled into a composite carbon source, the COD (Chemical Oxygen Demand) removal efficiency is high, the composite carbon source can be used as a carbon source during denitrification treatment of nitrate wastewater while wastes are effectively treated, the environmental pollution is reduced, and the resource recycling is realized.

The application discloses an enhanced Fenton process for treating dimethyl sulfoxide-containing wastewater. The method comprises the following steps: pretreating dimethyl sulfoxide-containing wastewater by a high-frequency electromagnetic water treatment device, and then feeding the magnetized wastewater into a Fenton reactor, and adding FeSO4 solution and H2O2 solution in batches to perform Fenton oxidation treatment. The application utilizes a magnetic field to increase the activity of water, so that water molecules are no longer tightly wrapped around dimethyl sulfoxide, and the action between hydroxyl radicals and dimethyl sulfoxide in the subsequent Fenton reaction is promoted. Meanwhile, FeSO4 and H2O2 are used as Fenton reagents, and the reaction process does not need to be adjusted for acid, the use amount of reagents can be reduced, and the treatment effect is stable and efficient.

This invention belongs to the field of antibiotic water pollution treatment technology and discloses a method for enhancing the degradation of antibiotics in water by SPC using precious opal piezoelectric catalysis. The method includes the following steps: (1) mixing precious opal with SPC and adding it to water containing antibiotics, stirring to form a suspension; (2) subjecting the suspension obtained in step (1) to piezoelectric catalytic reaction treatment to obtain purified water after antibiotic degradation. The method of this invention utilizes the synergistic effect of sodium percarbonate and precious opal to further improve the degradation rate of antibiotics. Both sodium percarbonate and precious opal used are environmentally friendly, solving the problems of potential environmental pollution and the need for strong acid reaction conditions associated with classic Fenton reagents. It has advantages such as simple process conditions, thorough degradation, fast degradation speed, and no secondary pollution, and can be widely applied to the degradation of antibiotics in water.

The present invention discloses a photo-Fenton coupled fluidized bed reaction device and a wastewater treatment process, which relates to the technical field of wastewater treatment and includes wastewater regulation and reagent pre-dosing; photo-catalytic-fluidized bed coupled reaction, monitoring the flow rate and pressure drop of the fluidized bed reaction, constructing a fluidization identification model and a fluctuation characteristic vector, judging whether the wastewater purification efficiency in the stable fluidization state is in the optimal range, if deviated, excluding interference factors through the causal method of event sequence, after confirming that it is caused by the flow rate, constructing a flow rate control model including a dynamic buffer boundary, and realizing flow rate control by using a closed-loop control and a hierarchical response mechanism; solid-liquid-gas three-phase separation and catalyst recovery, the reaction device includes: a photo-catalytic reaction module, a fluidized bed reactor module, a Fenton reagent dosing module, a three-phase separation module, a circulation system module and an auxiliary equipment module. The present invention is beneficial to achieving a stable wastewater treatment effect through dynamic flow rate control.

The present disclosure relates to a kind of iron-containing ZSM-5 molecular sieve and its preparation method and application, the method comprises: S1, silicon source, aluminum source, alkali source, seed crystal and water are mixed to obtain first mixture;S2, after iron source, peroxide, water and the first mixture are mixed, hydrothermal reaction is carried out;Wherein, the peroxide is selected from one or several of sodium persulfate, hydrogen peroxide and Fenton reagent.The method of the present disclosure does not use amine nitrogen organic matter and amine nitrogen ligand, and iron component is encapsulated by peroxide, which avoids amine nitrogen wastewater discharge, so as to realize the clean production of encapsulated iron ZSM-5 molecular sieve.

Methods of detecting the presence of one or more fluorinated compounds, including perfluoroalkyl or polyfluoroalkyl substance (PFAS), in a sample are provided. The methods include the steps of chemically treating a sample with an oxidizing agent, such as a persulfate solution or Fenton's reagent, collecting the fluorinated compounds, and detecting the fluorinated compounds using analytical methods.

The utility model relates to the field of environmental protection, in particular to a device for treating microalgae in lakes and rivers by coupling aerobic microorganisms with Fenton, which comprises an artificial sea grass system arranged in the lakes and rivers, an aeration device positioned below the artificial sea grass system and a Fenton oxidation system positioned above the liquid level of the lakes and rivers, the artificial sea grass system provides an attachment carrier for aerobic microorganisms in the water body, the aeration device provides oxygen for the aerobic microorganisms attached to the artificial sea grass system, and the Fenton oxidation system sprays a Fenton reagent to the water body; the artificial sea grass system provides an attachment carrier for aerobic microorganisms in a water body, and the aeration device provides oxygen supply for the aerobic microorganisms attached to the artificial sea grass system, so that a relatively good treatment effect on low-concentration COD (Chemical Oxygen Demand) and biochemically degradable wastewater is achieved; the Fenton oxidation system can simultaneously oxidize COD (Chemical Oxygen Demand) which is difficult to degrade in lakes and rivers, and meanwhile, generated iron floccules also have an excellent treatment effect on microalgae in the lakes and rivers.

The invention discloses a sewage treatment process based on ozone and Fenton, and relates to the technical field of nickel wastewater treatment. The problems that in the prior art, high-COD and high-nickel-concentration wastewater is difficult to effectively treat, and particularly Ni < 2 + > is difficult to deeply remove are solved. The process comprises the following steps: S1, pH regulation treatment: introducing nickel wastewater into a treatment tank, pumping the nickel wastewater into a regulation tank, adding sulfuric acid (H2SO4) or hydrochloric acid (HCl), regulating the pH to 2.0-3.0, and uniformly stirring and mixing the acidic nickel wastewater through a stirrer; s2, Fenton oxidation treatment: pumping the mixed acidic nickel wastewater into a Fenton reaction tank, and adding a Fenton reagent, a composite catalyst and a stabilizer. The treatment process can effectively deal with high-COD (Chemical Oxygen Demand) and high-nickel-concentration wastewater through a combined process of pH regulation, Fenton oxidation, alkalization precipitation, catalytic ozonation and flocculent precipitation, and particularly has outstanding performance in the aspect of deep removal of Ni < 2 + >, the final effluent meets the discharge standard, the sludge property is stable, the subsequent treatment is convenient, and dual oxidation is realized: Fenton destroys macromolecules, so that the wastewater can be effectively treated. Ozone treats small molecules, and complementarity is high.

The nickel-containing wastewater treatment system comprises a wastewater collection pool, the outlet end of the wastewater collection pool is connected with a Fenton reaction pool, and the outlet end of the Fenton reaction pool is sequentially connected with a reaction pool and a coagulation pool in the flowing direction of wastewater; the outlet end of the coagulating basin is connected with a flocculation basin, the outlet end of the flocculation basin is connected with a sedimentation basin, a water outlet of the sedimentation basin is connected with a sand filter, and the outlet end of the sand filter is connected with an ion exchanger for adsorbing residual nickel ions; according to the invention, ferrous sulfate and hydrogen peroxide are taken as Fenton reagents, hydroxyl free radicals with strong oxidizing property can be generated under an acidic condition, and complexed nickel is converted into free nickel; then capturing free nickel in water through a flocculating agent and generating large particles to flocculate and settle in a settling pond; and finally, trace nickel ions are separated through a sand filter and an ion exchanger, so that free nickel ions in the wastewater are reduced as much as possible, the sewage treatment quality is improved, and especially the treatment effect on the high-concentration nickel-containing wastewater is improved.

The invention discloses electro-Fenton wastewater purification equipment, and belongs to the technical field of wastewater treatment. Comprising a stirring cavity, a partition plate is fixedly connected to the lower surface of the stirring cavity, a flocculation chamber is fixedly connected to the lower surface of the partition plate, a motor is fixedly connected to the upper surface of the stirring cavity, a rotating rod is fixedly connected to the output end of the motor, and the bottom end of the rotating rod penetrates into the flocculation chamber; the motor is arranged in the flocculation chamber and rotationally connected with the lower surface in the flocculation chamber, and the upper surface of the motor is fixedly connected with a liquid storage cavity; through the collaborative design of gear transmission and an anti-backflow structure, the utilization efficiency of the Fenton reagent and the operation stability of the equipment are remarkably improved. On one hand, a transmission gear on the outer side of the rotating rod is meshed with a driven gear for driving a liquid feeding pipe, so that the liquid feeding pipe synchronously rotates along with the rotating rod and cooperates with a liquid outlet groove on the inner side, a Fenton reagent is annularly and uniformly sprayed to all positions of a stirring cavity, and the problem of non-uniform mixing caused by traditional fixed liquid feeding is solved.