98 results about "Sulfate radical" 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 discloses a self-template synthesized linear biochar-based bimetallic material as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: pretreating ganoderma lucidum residues, and pyrolyzing in a nitrogen atmosphere to prepare charcoal; and mixing the prepared biochar with cobalt nitrate and sodium molybdate to prepare CoMoO4 nanoparticles with in-situ growth of the biochar, and then washing and drying to obtain the BC-coated CoMoO4 linear biochar-based bimetallic material. Heterojunctions formed by binding sites of cobalt-molybdenum bimetal and biochar in the material form more defect sites, the synergistic effect of the metal and the micro-nano fibrous biochar is exerted, the degradation rate in the application of catalytic degradation of bisphenol A can reach 98.18% or above, a multiple reaction mechanism with sulfate free radicals is jointly shown, and the photocatalytic degradation of bisphenol A is realized. And the method has higher adaptability and effectiveness for complex pollutants.

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 present invention provides a method for preparing silver-coated copper powder, which relates to the technical field of metal powder preparation. This preparation method directly prepares a copper core by chemical reduction method, then uses electroless plating method to grow a silver layer on its surface, and finally uses jet milling to improve the density of the powder. In the present invention, reducing agents with different reduction effects are added twice to reduce copper sulfate, which reduces the initial reaction rate, makes the whole reaction stable, and improves the sphericity of copper crystal nuclei. At the same time, sulfate radicals in the reaction system can form silver sulfate precipitation with silver ions in the subsequent reaction, further slowing down the reduction rate of silver ammonia complex ions and enabling the dense growth of the silver layer. At the same time, the unreacted completely glucose remaining in the reaction system can continue to reduce silver ammonia complex ions when silver ammonia solution is added dropwise later. By strictly controlling the growth rate of silver powder from crystal seeds to particles, the present invention reduces the structural defects caused by rapid growth and improves the performance of the final product.

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 provides a preparation method of ultrahigh-purity copper. The preparation method comprises the following steps: providing a first anode, a first cathode and an electrolyte; the electrolyte comprises the following components: a purified copper salt solution, inorganic acid, an oxidizing agent and an additive, the purified copper salt solution comprises purified copper salt and water, the purified copper salt comprises copper sulfate and copper nitrate, and the molar ratio of nitrate to sulfate in the purified copper salt solution is (1.5-9): 1; the additive comprises any one or a combination of at least two of an alcohol compound, polyacrylamide or a tetrazole compound; and the first cathode and the first anode are immersed in the electrolyte for electrochemical deposition, and the ultra-high-purity copper is obtained. The electrolyte composed of the purified copper salt solution, the inorganic acid, the oxidizing agent and the additive is adopted, the proportion of nitrate radicals to sulfate radicals in the purified copper salt solution is controlled, the impurity content of the sulfur element and the silver element in the electrolyte can be controlled, and preparation of the ultra-pure electrolytic copper is achieved.

The invention belongs to the technical field of chemical water treatment corrosion prevention, and particularly relates to a corrosion prevention treatment method for a nuclear power plant equipment cooling water system metal material. The pH value is controlled to be 9.0-10.5 by adopting a method of slowly releasing lithium when a lithium type and oxyhydrogen type mixed resin purification bed runs, and impurities are removed by virtue of the resin purification bed so as to control chlorine, fluorine and sulfate radical impurity ions to be less than 50mu g / kg; the dissolved oxygen is controlled to be less than 50mu g / kg by adopting a method of nitrogen coverage at the upper part of the high-level water tank and slow oxidation and oxygen consumption of a metal material in an operation process. The problems existing in the aspect of system medium water discharge treatment are eliminated or simplified, meanwhile, the problems of unqualified water quality and corrosion caused by the fact that a high-concentration corrosion inhibitor leaks into other systems in current corrosion inhibition treatment are solved, and the microbial corrosion risk during corrosion inhibitor treatment is reduced.

The invention relates to a lanthanide oxide electrochemiluminescence aptamer sensor with dual signal amplification for detecting acetamiprid as well as a preparation method and application of the lanthanide oxide electrochemiluminescence aptamer sensor. According to the sensor, terbium-doped europium oxide (Eu2O3: Tb < 3 + >) modified by gold nanoparticles (Au NPs) is used as a luminous body, and the electrochemical luminescence performance can be remarkably improved through multiple mechanisms: on one hand, the Au NPs can effectively promote generation of more sulfate free radicals; on the other hand, the surface defect passivation effect and the efficient synergistic effect of energy transfer jointly achieve effective amplification of signals. In addition, the wool ball-shaped Ag NPs is used as a plasma resonance signal amplification source, so that the ECL intensity of the sensor is further enhanced. The prepared electrochemical luminescence sensor with the dual signal amplification effect is used for detecting acetamiprid (ACE), has a wide linear range and a low detection limit, and has a wide application prospect in detection of acetamiprid residues in a water environment.

The utility model provides a device for rapidly measuring the content of sulfate radicals, and relates to the technical field of water quality detection of water for polycrystalline silicon production. An inlet of the metering pump is connected with a sampling pipeline, and an outlet is connected with a conveying pipeline; the sampling pipeline is connected with the sample container; the conveying pipeline is connected with an inlet of the reaction container; the metering pump is provided with a detection mechanism which can detect the amount of samples conveyed by the metering pump; a detection reagent can be introduced into the reaction container, and the detection reagent is used for reacting with a sample to generate a colored product; the photoelectric detector is arranged close to the reaction container and is used for detecting the absorbance of the colored product; and the input end of the data processor is electrically connected with the output end of the photoelectric detector and the output end of the detection mechanism. Compared with an ultraviolet spectrophotometry, the method for determining the sulfate radical content of the water for polycrystalline silicon production based on the spectrophotometry has the advantages of higher detection precision and more convenient operation.

The invention discloses a device and a method for synchronously removing heavy metals and organic matters in industrial wastewater, and particularly relates to the technical field of water treatment.A complexing agent is used for promoting manganese dioxide on the surface of manganese sand to activate peroxymonosulfate to generate high-activity sulfate free radicals and persulfate free radicals, so that the oxidative degradation efficiency of organic pollutants is improved; meanwhile, residual manganese dioxide formed in the reaction process has good heavy metal adsorption performance, and the mass transfer and reaction rate of pollutants is enhanced by combining the dynamic fluidized contact effect of manganese sand particles in the fluidized bed reactor. According to the process provided by the invention, various organic pollutants and heavy metal ions in the wastewater can be synchronously and efficiently removed under a mild condition, the problems of low treatment efficiency, complex process flow, secondary pollution and the like in a traditional method are avoided, and the process has a good application prospect and popularization value; the technical challenges of complex components and high treatment difficulty of industrial wastewater can be effectively handled.

The invention discloses a treating agent for organic pollutants in sewage as well as a preparation method and application of the treating agent in the technical field of sewage treatment, and adopts a phosphorus / B introduction dual strategy to realize accurate control of doping positions and proportions of P and B elements on a molecular level; according to the present invention, the synergistic enhancement effect of the catalyst on the aspects of active sites, charge transfer and free radical generation ability is improved, the precursor structure is induced to generate the porous structure during the pyrolysis process, and the specific surface area of the catalyst and the diffusion mass transfer of the reactant can be easily enhanced, and the prepared treatment agent can be used in the PMS system advanced oxidation technology industrial sewage treatment method, according to the treatment method, potassium hydrogen persulfate and a specific treatment agent are synergistically used, the generation efficiency of sulfate free radicals and hydroxyl free radicals in a PMS activation system is remarkably improved, efficient recovery of the heterogeneous catalyst is achieved in a multivalent metal ion bridging mode, the loss rate of the catalyst is reduced, and the utilization rate of the catalyst is increased. And secondary pollution of the catalyst to the effluent is also avoided.

The invention provides a saline-alkali soil improver with a high-activity surface and application, and belongs to the technical field of saline-alkali soil improvement. Under the ultrasonic condition, a sulfur source is pre-loaded into biomass, under the action of sulfate free radicals, the surface of hydrothermal carbon is etched in the hydrothermal reaction process, the specific surface area and porosity are increased, and meanwhile, part of fractured C-C bonds provide active sites for sulfur doping; meanwhile, alginate and Fe < 3 + > are cross-linked to form a hydrogel network, hydrothermal carbon is wrapped, sulfur stability is enhanced, direct contact between the material and soil is reduced, functional groups of the material are protected, efficient ion exchange in the membrane is achieved, and meanwhile the action duration of the material is prolonged. Through a triple mechanism of'exchange desalination-soil agglomeration-nutrient synergism ', physical, chemical and biological characteristics of the saline-alkali soil can be improved, crop growth is promoted, the content of heavy metals in the soil is reduced, carbon immobilization is enhanced, the bioavailability and toxicity of pollutants are reduced, and the structure and function of an ecological system are restored.

The invention belongs to the technical field of wastewater treatment, and discloses an efficient evaporative crystallization treatment process for zinc-containing wastewater, which comprises the following steps: 1) adding a hydrogen peroxide solution into the zinc-containing wastewater, and applying ultrasonic waves to carry out ultrasonic enhanced oxidation; 2) stopping ultrasonic treatment, introducing sulfate radicals into the zinc-containing wastewater, adjusting the pH value, precipitating, separating the precipitate, adding a chelating agent and an anti-scaling agent into the zinc-containing wastewater, stirring for reaction, separating the precipitate, and then performing microfiltration to obtain pretreated zinc-containing wastewater; 3) feeding the pretreated zinc-containing wastewater into a multi-stage flash evaporation system to obtain a zinc-containing concentrated solution; 4, the zinc-containing concentrated solution is fed into a crystallizer, microbubbles are introduced, meanwhile, ultrasonic waves are applied to enhance gas-liquid interface disturbance to promote crystallization, crystals are separated from crystallization liquid and then dried, and the zinc salt is obtained.The technology achieves the multiple purposes of low scaling rate, low energy consumption, high recovery rate and high zinc salt purity, and has excellent industrial implementability and popularization value.

The invention discloses a high-concentration sulfate acid pit water treatment method based on an acid-resistant SRB biological cathode, which comprises the following steps: enabling acid pit water to pass through a grid and then enter a regulating reservoir; introducing the wastewater in the regulating tank into a biological membrane electrochemical device for electrochemical reaction; oxidizing Fe < 2 + > in the wastewater into Fe < 3 + > on a titanium-based IrO2 anode plate and releasing electrons in an anode chamber; in the cathode chamber, an acid-resistant SRB bacterial film loaded on the surface of the carbon felt electrode reduces SO4 < 2-> into S < 2-> by utilizing transferred electrons; cO2 microbubbles are introduced into the liquid in the cathode chamber to react with S < 2-> to generate sulfur precipitates, and the reacted mixed liquid enters a cyclone separator to realize gas-solid separation; and carrying out hydrolysis reaction on Fe < 3 + > in the effluent of the anode chamber to generate Fe (OH) 3 precipitate, mixing the Fe (OH) 3 precipitate with sodium silicate, and calcining to convert the mixture into magnetic alpha-Fe2O3. The method can effectively remove SO4 < 2-> and recover iron sludge.

The present invention discloses a method for treating chlorine-containing waste acid water. Zinc suboxide or zinc calcine is added to the chlorine-containing waste water for neutralization. Different neutralizing agents are added to the chlorine-containing waste water for neutralization, followed by primary and secondary zinc precipitation. Sulfate radicals in the chlorine-containing waste water are completely recovered in the form of basic zinc sulfate, while chlorine remains in the waste water. This achieves the recycling of sulfuric acid and avoids chlorine enrichment and secondary dechlorination. No gypsum slag is generated during the treatment of chlorine-containing waste water by the present invention. The entire reaction process is mild, energy-efficient, safe, and environmentally friendly. The auxiliary materials used in the treatment method are low-cost, no expensive reagents or a new evaporation system are required, and the industrial output value is high and economical.

The application discloses a high-concentration sulfate radical acid mine water treatment method based on acid-resistant SRB biological cathode, which comprises the following steps: after the acid mine water is filtered through a grid, the acid mine water is fed into an adjusting tank; the wastewater in the adjusting tank is fed into a biological membrane electrochemical device to perform an electrochemical reaction; in an anode chamber, Fe 2+ in the wastewater is oxidized into Fe 3+ and releases electrons; in a cathode chamber, the acid-resistant SRB bacterial membrane loaded on the surface of a carbon felt electrode utilizes the transmitted electrons to reduce SO4 2‑ into S 2‑ ; CO2 micro-bubbles are fed into the liquid in the cathode chamber to react with S 2‑ to generate sulfur precipitate, and the mixed solution after the reaction is fed into a cyclone separator to realize gas-solid separation; Fe 3+ in the water in the anode chamber generates Fe(OH)3 precipitate through a hydrolysis reaction, the Fe(OH)3 precipitate is mixed with sodium silicate, and is calcined to be converted into alpha-Fe2O3 with magnetism. The method can effectively remove SO4 2‑ and recover iron mud.

The present invention provides a method for the efficient mineralization of organic pollutants by series electrochemical method, which belongs to the field of water treatment technology. 1 O2+SO4 ·– ‑TRS system, the system adopts a two-electrode DC power supply, and sequentially includes a singlet oxygen degradation system and a sulfate radical degradation system; the singlet oxygen degradation system uses a Fe / CNT electrode as a cathode and a Ti4O7 as an anode; the sulfate radical degradation system uses a Fe / CA electrode as a cathode and a Ti4O7 as an anode. 1 O2) and sulfate radicals (SO4 ·‑ ) 1 O2+SO4 ·– The TRS system can achieve 90-100% mineralization of sulfonamide antibiotics (SAs) within 30 minutes, which is much higher than that of the single 1 O2 / HO · / SO4 ·– ‑AOP system.

The invention discloses a vibrio devilis JHS2 strain and application thereof, and belongs to the technical field of microorganisms. The vibrio velutina JHS2 provided by the invention is separated and screened from a natural seawater environment of a Yitai golden beach sea area in China, the strain can efficiently and directionally degrade SC-FUC, a degradation product has a relatively high sulfate radical retention rate and very concentrated molecular mass distribution, and under the conditions that the growth temperature is 30 DEG C, the salinity is 3%, the pH value is 7.5 and the inoculum size is 3%, the yield of the SC-FUC is increased, and the yield of the SC-FUC is increased. The degradation rate of the strain on SC-FUC reaches 68.04%, the mass fraction of sulfate radicals of a degradation product is 33.78%, the relative molecular mass distribution range is within 600Da, and the sea cucumber fucoidin oligosaccharide with the DP being 2-4 can be prepared.

The invention provides a method for degrading organic matters in wastewater by using sulfate free radicals, and relates to the technical field of sewage treatment. The method for degrading the organic matters in the wastewater by using the sulfate free radicals comprises the following steps: S1, pre-enrichment and mechanical energy triggering; s2, self-triggering activation and targeted degradation; and S3, performing adaptive process control. According to the technology, the reaction is driven by wastewater flowing mechanical energy through a self-triggering mechanism, energy consumption is greatly reduced, targeted enrichment of pollutants and in-situ utilization of free radicals are achieved through an interface micro-reaction field, the degradation efficiency and anti-interference performance can be improved, the whole process is environmentally friendly, and the operation cost is lower.

The invention belongs to the technical field of isotope recovery and separation, and discloses a method for recovering high-abundance C13 carbon dioxide from C13 urea based on acidic constant-temperature hydrolysis. According to the method, the hydrolysis rate of the C13 urea is maintained by selecting proper dilute sulfuric acid concentration, sulfate radicals and urea are prevented from forming an adduct by controlling the dilute sulfuric acid concentration, the release efficiency of the 13CO2 is increased, the reaction rate is controlled, and side reaction is avoided. The invention further provides a set of reaction device for recycling 13CO2 through acidic constant-temperature hydrolysis of C13 urea under reduced pressure, the gas-liquid phase contact area and residence time are remarkably increased by arranging the rectifying column, visual water removal and low temperature are realized through the water removal column and the condenser pipe, the problems of external CO2 pollution, high impurity air content and relatively high water content are solved, and the method is suitable for industrial production. And high abundance recovery of the 13CO2 is ensured.

The present invention belongs to the technical field of water treatment, and mainly mentions a device for treating sulfate radicals in the brine system of the chlor-alkali industry. It includes: a base; a reaction tank fixedly connected to the base; a water inlet device fixedly connected inside the reaction tank, the water inlet device is fixedly connected and communicated with a liquid inlet pipe, and the reaction tank is fixedly connected to the liquid inlet pipe; a water outlet tray hermetically and rotatably connected inside the reaction tank, a number of drain holes are provided on the water outlet tray, an ion exchange resin layer is arranged inside the reaction tank, and the bottom of the reaction tank is fixedly connected and communicated with a liquid outlet pipe. By rotating the water outlet tray, the position of the drain holes on the water outlet tray is continuously changed, the flow area of the brine in the ion exchange resin layer is changed, so that the brine evenly flows through the ion exchange resin layer, reducing the probability of the brine having a flow dead angle, improving the uniformity of the reaction between the ion exchange resin layer and the brine, and further increasing the probability of removing sulfate ions in the brine.

The application discloses a method for degrading VOCs by using a high-level oxidation coupling wet washing process. x The strong active species such as sulfate radicals and hydroxyl radicals generated by activating the PMS solution by the catalyst are degraded into small molecules, even carbon dioxide and water. In the application, the oxidant is added into the reactor body drop by drop by using a peristaltic pump, so that the removal rate of VOCs and the stability of the mineralization rate are effectively improved, the utilization rate of the oxidant is improved, and the process is low in energy consumption, simple in operation and difficult to cause secondary air pollution.

The application discloses a method for preparing modified carrageenan by using a slurry method and application thereof. The method comprises the following steps: uniformly mixing potassium salt, deionized water, an oxidant and carrageenan to obtain a slurry, preparing modified carrageenan by using the slurry oxidation method, and improving the stability of the modified carrageenan in the oxidation degradation reaction through the electrostatic action between potassium ions and sulfate radicals in the carrageenan, so that the content of the sulfate radicals in the modified carrageenan is improved. The method uses a single hydrogen peroxide oxidant, has simple and efficient preparation, low solvent consumption, is green and environment-friendly, and has the dual advantages of low molecular weight and high sulfate radical content of the prepared modified carrageenan, and has a wide application prospect in the field of anticoagulation.

The invention discloses a rare earth radioactive slag reduction and barium sulfate slag recycling method based on transformation and decomposition of barium sulfate. The method comprises the following steps: drying, ball-milling and screening rare earth radioactive slag, adding water into sodium hydroxide, and mixing to obtain rare earth slag; roasting and transforming the rare earth slag under the condition of introducing carbon dioxide; washing the roasted and transformed rare earth slag with water; the washed rare earth slag is subjected to acid dissolution and solid-liquid separation, and high-silicon slag without radioactive elements and an acid solution with the radioactive elements are obtained; sulfuric acid is added into the acid solution step by step for fractional precipitation and radium removal, and barium and radium residues containing radioactive elements and barium sulfate residues without radioactivity are obtained through solid-liquid separation; adjusting the mass ratio of the barium sulfate slag and sodium hydroxide, then carrying out alkali conversion and acid dissolution to obtain a barium chloride solution, and recycling the barium chloride solution for removing sulfate radicals from the rare earth feed liquid. According to the method, barium sulfate in the rare earth radioactive slag can be transformed into more than 95% of soluble barium salt, the amount of the rare earth radioactive slag is reduced by more than 85%, and the barium circulation rate reaches more than 90%.

The present invention relates to a device for electro-slowly releasing sulfate radicals in wastewater removal, which comprises a sulfate radical precipitation unit and a precipitation removal unit connected in sequence, and a sulfate radical detection unit arranged on the upstream pipeline communicating with the water inlet of the sulfate radical precipitation unit; the sulfate radical detection unit is used for detecting the concentration of sulfate ions contained in the raw water before entering the sulfate radical precipitation unit; the sulfate radical precipitation unit is used for releasing barium ions to the raw water according to the detected sulfate ion concentration, so that the barium ions react with the sulfate ions to generate barium sulfate, and the sulfate radical precipitation product water containing barium sulfate is obtained; the precipitation removal unit is used for removing the barium sulfate contained in the sulfate radical precipitation product water to obtain the precipitation removal product water. The present invention can accurately control the release rate of barium ions according to the concentration of sulfate radicals in the water body, and can recover the excessive barium ions in the water, overcoming the secondary pollution caused by the inability to accurately control the dosage of barium ions in the traditional precipitation method, and reducing the amount of sludge generated at the same time.

The invention discloses a method for detecting the content of sulfate radicals in gallium waste liquid, which is characterized in that the sampling amount is reduced from original 10mL to 5mL, the addition amount of concentrated hydrochloric acid is adjusted from 20mL to 5mL, and the pH value of the system is still maintained at 1-2 after the reaction is complete; the barium chloride solution keeps the original procedure dosage (20mL 10%), barium sulfate is ensured to be completely precipitated, and the steps of filtering, washing, firing and weighing are completed according to the original procedure after precipitation. Multiple parallel tests verify that the relative standard deviation of the method is smaller than or equal to 3%, and the production detection precision requirement is met; the method is compatible with the existing standard operation process of an enterprise, adapts to the characteristic of high concentration of gallium waste liquid sulfate radicals, does not need to add equipment or extra training, and can be directly applied to the ground.

The invention provides a tunnel lining concrete self-adaptive damage evaluation method based on the rich sulfate radical effect, and relates to the technical field of tunnel safety prevention and control. Experimental conditions are formulated according to the actual sulfate radical concentration range and the temperature range of a tunnel, and a permeation model is obtained; according to the method, sulfate radical permeation conditions are simulated in a tunnel lining three-dimensional model, point locations with high permeation depths are selected according to simulation results for sampling observation, and the simulation results are corrected, so that the simulation results are corrected by using actual results, and meanwhile, the conditions of the whole tunnel lining are judged by using the corrected simulation permeation depths. Meanwhile, dangerous points are given, the sulfate radical permeation change condition of the lining in long-term use is considered, and damage evaluation is completed in a mode of combining deduction and field data.

The invention discloses iron-cobalt modified biochar as well as a preparation method and application thereof, and belongs to the technical field of organic pollutant treatment, the iron-cobalt modified biochar can remove norfloxacin through an adsorption effect, and can activate peroxymonosulfate to generate sulfate free radicals, so that the norfloxacin is degraded through an advanced oxidation process. Fe and Co on the surface of Co-Fe-BC are used as catalysts, the energy threshold of sulfate free radicals generated by persulfate decomposition can be reduced, and the activation rate of persulfate is increased. The generated sulfate free radicals have high oxidation-reduction potential, can attack norfloxacin molecules in a non-selective manner, and initiate free radical chain reaction through hydrogen atom picking or an electron transfer mechanism, and finally, norfloxacin is mineralized into harmless small molecular substances, such as carbon dioxide and water. The process not only effectively removes norfloxacin, but also reduces the generation of disinfection by-products, and improves the safety of water quality.

The present invention relates to a magnetized modified polypropylene meltblown cloth activation material and a preparation method thereof. The prepared magnetized modified polypropylene meltblown cloth can effectively solve the agglomeration problem of magnetic ferrites in Fenton reactions such as sulfate radical advanced oxidation processes (SR-AOPs), and can activate persulfate in the catalytic system. Degradation and removal experiments have shown that the material has a good removal effect on the antibiotic chlortetracycline. Moreover, the material can relatively easily perform solid-liquid separation from contaminated water bodies under the action of an external magnetic field. The polypropylene meltblown cloth material used is extracted from discarded protective masks, which not only realizes the reuse of waste but also achieves the purpose of using waste to treat pollution.

The invention relates to ferrous phosphate based on mixed acid and iron powder and a preparation method and system thereof.The preparation method comprises the steps that dilute phosphoric acid and dilute sulfuric acid are mixed, pure iron powder is added into the mixed acid according to the ratio of n (p) to n (Fe) being (0.67-1): 1, and an iron dissolving reaction is conducted after a certain temperature is reached; taking the temperature as a starting point, sampling once every time period, analyzing the content of Fe < 2 + > in the obtained sample, and obtaining a ferrous liquid when the content of Fe < 2 + > in the sample reaches 3.5-5.0%; adding ammonia water into the ferrous liquid until the pH value of a reaction system reaches 5.0-6.5 to obtain slurry; and aging the slurry, and carrying out filter pressing, washing and drying to obtain the ferrous phosphate octahydrate. According to the method, the content of sulfate radicals in the obtained product can be effectively controlled while the use amount of phosphoric acid is reduced, the product quality is effectively improved, meanwhile, the thickness distribution uniformity of a ferrous phosphate octahydrate crystal lamellar structure is controlled, the thickness of the lamellar structure is reduced, the product quality is improved, and the compaction density of lithium iron phosphate is improved.