131 results about "Sodium persulfate" patented technology

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for improving the leaching rate and the carbon adsorption rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; a green oxygen activating agent and hydrogen peroxide are sequentially added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore, ore pulp activating liquid is formed, and the green oxygen activating agent is a mixture of calcium oxide, sodium persulfate and soluble bivalent iron salt; and adding a gold leaching agent into the ore pulp activation solution, adjusting the pH value of the ore pulp to 9-12, carrying out stirring gold leaching treatment, filtering to obtain a leaching solution, and then adding activated carbon to adsorb and extract gold. According to the method, a stronger oxidation environment is provided, meanwhile, the residual concentration of arsenate radicals in the solution is effectively reduced, the leaching rate of gold and the adsorption rate of activated carbon are greatly increased, excellent oxidation performance and environment friendliness are shown, and a more sustainable high-sulfur-arsenic gold ore pretreatment process is provided.

The invention discloses a method for preparing battery-grade lithium phosphate and iron phosphate by recycling waste lithium iron phosphate batteries, and belongs to the technical field of lithium ion battery recycling. The method comprises the following steps: mixing and calcining black powder recovered from the waste lithium iron phosphate battery and sodium persulfate; adding water for dissolving, filtering to obtain a water leaching solution A and leaching residues, washing the leaching residues with water, and calcining at high temperature to obtain battery-grade iron phosphate; adding a sodium hydroxide solution into the water extract A, and reacting to obtain a water extract B; adding a trisodium phosphate solution into the water immersion liquid B, performing suction filtration after reaction to obtain lithium phosphate and filtrate, and cleaning and drying the lithium phosphate to obtain battery-grade lithium phosphate; and freezing and denitrifying the filtrate to obtain a denitrified solution, and adding the denitrified solution into the sodium hydroxide solution for recycling. The filtrate is recycled in the whole production process, zero loss of the lithium element is theoretically realized, the iron element is prevented from entering the solution, the preparation steps of the lithium phosphate are simplified, and the method has the advantages of economy and environmental protection.

The utility model discloses a pesticide wastewater advanced treatment device which comprises a first-stage oxidation tower, a second-stage main reaction tower and a third-stage delay reaction tower which are sequentially arranged, a water outlet of the first-stage oxidation tower is communicated with a water inlet of the second-stage main reaction tower, and a water outlet of the second-stage main reaction tower is communicated with a water inlet of the third-stage delay reaction tower; the primary oxidation tower comprises a first tower body, a water inlet pipe, a first hydrogen peroxide adding pipe and an ozone jet device, the water inlet pipe is communicated with the first tower body, the first hydrogen peroxide adding pipe is communicated with the water inlet pipe, and the ozone jet device is mounted on the first tower body to introduce ozone into the first tower body; the secondary main reaction tower comprises a second tower body, a sodium persulfate dosing pipe and an ozone aeration disc; the sodium persulfate dosing pipe is communicated with a water inlet of the second tower body; the ozone aeration disc is arranged at the bottom in the second tower body; the third-stage delay reaction tower comprises a third tower body and a second hydrogen peroxide adding pipe, and the second hydrogen peroxide adding pipe is communicated with a water inlet of the third tower body.

The invention relates to the technical field of switch valves, in particular to a switch valve for sodium persulfate production, which comprises a gas source, a valve body assembly and a sealing assembly, the valve body assembly comprises a valve body, the valve body comprises a hollow cylinder and a connecting rod, and the connecting rod is vertically connected to the outer wall of the hollow cylinder; a transmission channel and an airflow channel are arranged in the connecting rod and penetrate through the outer wall of the hollow cylinder; the sealing assembly comprises a second air source valve and a sealing ring, and the sealing ring is made of an elastic material; a plurality of cavities are formed in the sealing ring and are communicated with the airflow channel; the second air source valve is communicated with the air source, the outside and the airflow channel; by additionally arranging the additional airflow channel, intermittent inflation and deflation can be carried out by utilizing an air source when medium flow is generated in a discharging state, and sodium persulfate crystallized on the surface of the sealing ring is repeatedly extruded and stretched by combining with an elastic material, so that the sodium persulfate is crystallized and broken and then is taken away by a medium flow; and an emergency leaking stoppage effect can also be achieved.

A process for the production of iron phosphate, comprising the following steps: (1) Mixing an iron phosphide waste, an acidic liquid, an oxidizing agent and an adsorbent with stirring, heating to leaching and subjecting the resulting mixture to solid-liquid separation to obtain a first filtrate and a first filter residue; (2) Adding an alkaline liquid to the first filtrate to adjust the pH of the first filtrate, maintaining a temperature of the resulting mixture, and subjecting the resulting mixture to solid-liquid separation to obtain a second filter residue and a second filtrate; and subjecting the second filter residue to heat treatment to obtain iron oxide; (3) Subjecting the iron oxide to high-energy ball milling and adding a surfactant for activation to obtain a slurry; (4) Adding an extraction agent and an acidic liquid to the second filtrate obtained in step (2), carrying out an extraction and separation on a resulting mixture and subjecting a resulting organic phase to back-extraction to obtain phosphoric acid; and (5) Mixing the slurry obtained in step (3) with the phosphoric acid, heating to enable a reaction, subjecting the resulting mixture to solid-liquid separation to obtain a solid, and washing and sintering the solid to obtain the iron phosphate; where in step (1) the iron phosphide waste comprises a mixture of FeP and Fe2P; in step (1) the acidic liquid contains at least two from the following group: nitric acid, sulfuric acid and hydrochloric acid; In step (1) the oxidizing agent is at least one selected from the group consisting of hydrogen peroxide, oxygen, nitric acid and sodium persulfate; wherein in step (2) the alkaline liquid is at least one selected from the group consisting of a NaOH solution, a KOH solution, ammonia water, a urea solution, NH4Cl, NH4HCO3, Na2CO3 and NaHCO3; In step (2) the pH of the first filtrate is adjusted to 2.5 to 5; and In step (5) the molar ratio of Fe in the slurry to P in the phosphoric acid is 1:1–2; heating to enable a reaction is carried out at a temperature of 50 °C to 80 °C for 20 to 60 min; and the iron phosphate has a D 50 from 2 µm to 6 µm, a tapped density of 0.80 g / cm³ 3 up to 1.30 g / cm³ 3 , and a specific surface area of ​​4 m² 2 / g up to 8 m 2 / g indicates.

The present application relates to the technical field of combustible substance detection in ammonium nitrate, and provides an automatic device for detecting combustible substance in ammonium nitrate, which comprises a reagent storage unit for storing ammonium nitrate sample, sodium persulfate reagent and phosphoric acid reagent; a CO2 infrared analyzer is connected with the reagent storage unit, the CO2 infrared analyzer can receive the reagent supplied by the reagent storage unit and determine the content of CO2 after the combustible substance in the ammonium nitrate sample is oxidized by the sodium sulfate reagent to form CO2; a controller controls the reagent storage unit to supply the reagent to the CO2 infrared analyzer, and receives and analyzes the content information of CO2 determined by the CO2 infrared analyzer to obtain the content of combustible substance in ammonium nitrate. The automatic device for detecting combustible substance in ammonium nitrate provided by the present application realizes efficient detection of combustible substance by using wet oxidation-infrared quantitative technology.

Disclosed in the present invention are an acrylate emulsion for a polymer cement waterproof coating, a raw material composition thereof, a preparation method therefor, and a use thereof. The raw material composition comprises the following components in parts by weight: 3-4.5 parts of sodium dodecyl diphenyl ether disulfonate, 1.5-2.5 parts of acrylamide, 2-4 parts of fatty alcohol polyoxyethylene ether, 2-4 parts of polyethylene glycol dimethacrylate, 1-2 parts of acrylic acid, 0.5-1 part of titanium triisostearoylisopropoxide, 40-60 parts of acrylate, 0.5-1 part of sodium persulfate, 50-60 parts of deionized water, and 0.1-0.3 parts of a 10% sodium hydroxide solution. The acrylate emulsion prepared by the present invention has excellent performance and good dispersibility, and a polymer cement waterproof coating prepared by using the emulsion of the present invention has lower viscosity and better workability.

The invention discloses a dechlorination method of a wet-process phosphoric acid process, and belongs to the technical field of dechlorination of wet-process phosphoric acid. The method comprises the following steps: adding ground phosphorite into a reaction tank A, carrying out decomposition reaction on the phosphorite and high-temperature slurry to obtain slurry a, pumping the slurry a into a reaction tank B, adding concentrated sulfuric acid and a sodium persulfate solution, activating sodium persulfate in the inherent high temperature, strong acid and Fe2 environment, carrying out oxidation dechlorination reaction, and carrying out solid-liquid separation to obtain low-chlorine phosphoric acid and phosphogypsum; finally, the reaction tank B is connected with a tail gas washing system, water is used for circulating washing, then alkali liquor is used for countercurrent washing, and the pollution discharge standard is met. The oxidation dechlorination process is integrated in the wet-process phosphoric acid production process for the first time, chloride ions are efficiently oxidized into chlorine to be removed by utilizing the strong oxidizing property of sodium persulfate, the dechlorination rate can reach 95% or above, the chlorine content in phosphoric acid is remarkably reduced, equipment corrosion is relieved, the product quality is improved, and the method is simple in process, low in energy consumption, low in cost, green, environmentally friendly and suitable for industrial production. The method is suitable for industrial application.

The present application relates to the technical field of water treatment, and particularly relates to a coal chemical industry reverse osmosis concentrated water treatment method, wherein the coal chemical industry reverse osmosis concentrated water is adjusted in pH value, and then sequentially filtered by a positively charged HCRNF membrane and a negatively charged NF245 membrane to realize acid nanofiltration desalting; the concentrated water obtained by the positively charged membrane and the negatively charged membrane is treated by a sodium persulfate system activated by ultraviolet light, and then returned to a front-end RO concentrated water treatment unit; the water produced by the positively charged membrane is desalted by RO1 reverse osmosis membrane deep treatment, and the produced water meets the discharge / recycle standard; and the concentrated water of the reverse osmosis membrane enters an evaporation crystallization unit. The present application takes into account efficient removal of COD and effective separation of salt, reduces energy consumption, significantly inhibits the risk of irreversible membrane surface pollution, and provides core technical support for improving the treatment efficiency and system stability of the nanofiltration unit.

The invention relates to the technical field of sewage treatment, in particular to a high-fluorine desulfurization wastewater resourceful treatment method and device.The treatment method comprises the steps that S1, preliminary fluorine removal is conducted, specifically, metal salt and coagulant aids are added into wastewater under the acidic condition for a reaction; s2, performing ultrafiltration treatment; s3, deep fluorine removal: carrying out deep adsorption on ultrafiltration effluent by using Fe / Al modified resin; s4, primary electrolysis; s5, acidification reaction: adding sulfuric acid into the system, adjusting the pH to be acidic, and controlling the temperature for reaction; s6, primary low-temperature salt extraction: performing vacuum negative-pressure evaporative crystallization, and performing centrifugal drying to obtain a sodium persulfate solid; s7, secondary electrolysis: carrying out secondary electrolysis on the centrifugal mother liquor in the step S6; and S8, secondary low-temperature salt extraction: performing vacuum negative-pressure evaporative crystallization, and performing centrifugal drying to obtain a sodium persulfate solid. According to the treatment method, the produced water can be recycled, high-value resource utilization of salt in the wastewater is realized, and the treatment cost is reduced.

The invention provides a reagent for treating steel industry membrane concentrated water and a water treatment method, and relates to the technical field of waste liquid treatment.The steel industry membrane concentrated water treatment reagent is prepared from, by mass, 0.8-4.5 parts of a first oxidizing agent, 0.5-3.5 parts of a second oxidizing agent and the balance auxiliary reagents, the first oxidizing agent is composed of 0.3-2.5 parts of sodium peroxide and 0.5-3.5 parts of ozone, the second oxidizing agent is 0.5-3.5 parts of sodium persulfate, and the dosage of the reagent is 3-15 g / L. Ozone is introduced by adopting an ultra-fine bubble technology; when the reagent is used for a water treatment process, ozone and sodium peroxide have a synergistic effect, so that the effect of reducing the COD value in membrane concentrated water is enhanced; an ozone ultra-fine bubble technology is adopted, so that addition of an additional catalyst can be avoided; according to the technology, the COD value of the membrane concentrated water can be effectively reduced, other suspended solids and heavy metal ions are treated, and reuse water meeting the standard is obtained.

The invention relates to the technical field of environmental protection, in particular to application of an ethylene waste alkali solution to preparation of sodium carbonate, the ethylene waste alkali solution is used as a raw material, and an ethylene waste alkali solution treatment device is used for preparing a sodium carbonate product with the purity of 99% or above. The method comprises the following steps: providing a sodium sulfate solution through a sodium sulfate supply device by taking ethylene waste alkali liquor as a raw material; according to the method, sodium ion exchange resin is used as a raw material, an ammonium bicarbonate solution and a sodium chloride solution are supplemented into the sodium ion exchange resin at the same time, the ethylene waste alkali liquid is used as the raw material, and NH4HCO3, NaCl and Na2SO4 are input at the same time when Na < + > ions in the sodium ion exchange resin are insufficient, so that exchange of the Na < + > ions and the NH4 < + > ions is accelerated, and sodium carbonate with the purity being 99% or above is prepared. The problems that in the prior art, sodium carbonate prepared by taking ethylene waste alkali liquor as a raw material contains sodium sulfate and the purity of sodium carbonate is not high are solved.

This invention relates to the field of water pollution remediation technology, specifically providing an iron-titanium co-loaded resin material, its preparation method, and its application. The preparation method of the iron-titanium co-loaded resin material includes the following steps: preparing an Fe-loaded resin intermediate by shaking and soaking a sulfonic acid-based cation exchange resin with an iron ion solution; preparing an iron-titanium composite modified resin intermediate by shaking and soaking the Fe-loaded resin intermediate with a titanium ion solution; and stirring the iron-titanium composite modified resin intermediate with a mixed treatment solution containing sodium persulfate and sodium hydroxide, washing until neutral, and drying to obtain a composite resin material co-loaded with iron oxide and titanium oxide. This iron-titanium co-loaded resin material can significantly reduce manganese ion concentration when applied to groundwater purification and can be used in in-situ groundwater remediation projects.

The invention discloses a sewage filtration treatment method, which belongs to the field of sewage treatment, and comprises a pretreatment stage, a composite membrane filtration stage, an advanced oxidation-adsorption coupling filtration stage, a deep purification stage and a resource recovery stage, and is characterized in that suspended particulate matters and part of organic matters are removed by adjusting the pH value of sewage and adding a modified diatomite adsorbent; carrying out pressure filtration through a three-stage composite membrane assembly to obtain a primary filtrate; then, a ferrous ion-sodium persulfate-ozone-ultraviolet synergistic oxidation process is adopted, coupling filtration is achieved in combination with a double-layer modified activated carbon filter layer, and then deep purification is completed through ion exchange and ultraviolet disinfection. According to the sewage filtering treatment method, adsorption, filtering and advanced oxidation technologies are efficiently coupled, the treatment effect and the resource utilization rate are considered, operation is easy and convenient, running is stable, the content of COD, suspended particulate matter and ionic pollutants in sewage can be effectively reduced, and the sewage filtering treatment method is suitable for various industrial and domestic sewage treatment scenes.

The application provides a kind of nickel hydroxide and its preparation method, advanced oxidation reagent and application in water treatment, belong to catalytic technology field.The preparation method includes the following steps: S1, NaOH solution and nickel salt solution are mixed to obtain first mixed solution, then the pH of the first mixed solution is adjusted to 11-12, and the second mixed solution is obtained by standing treatment under room temperature condition;S2, the second mixed solution is activated at 50-60 DEG C, and the precipitate is separated;S3, the precipitate is washed and dried to obtain beta type nickel hydroxide.The nickel hydroxide obtained by the preparation method has excellent activation sodium percarbonate and / or sodium persulfate effect, and can improve its removal efficiency of organic pollutants.

A composition for the oxidative color change of keratinous fibers, comprising – based on its total weight – (a) one or more per compounds from the group consisting of sodium percarbonate, potassium percarbonate, sodium perborate and potassium perborate in a total amount of 0.5 to 14.0 wt.%, and (b) one or more persulfates from the group consisting of ammonium persulfate, potassium persulfate and sodium persulfate in a total amount of 5.0 to 60.0 wt.%, and (c) less than 10.0 wt.% water, characterized in that it contains 3.0 to 12.0 wt.% sodium percarbonate, and contains 7.0 to 16.0 wt.% ammonium persulfate, and contains 20.0 to 45.0 wt.% potassium persulfate, and contains 1.0 to 6.0 wt.% sodium persulfate.

The invention discloses a uranium-containing wastewater treatment method which comprises the following steps: step 1, heating a uranium solution to 70-90 DEG C, adding a preset mass of sodium sulfate and sodium persulfate, controlling the pH value of the solution in the reaction process to be 1.5-2.0, reacting for 2-4 hours, and then carrying out liquid-solid separation to obtain uranium-precipitated mother liquor and impurity-removed slag; step 2, adding sodium hydroxide into the uranium precipitation mother liquor, adjusting the pH value of the solution to 7-8, and filtering to obtain low-iron impurity sodium diuranate precipitate and uranium-containing wastewater; step 3, adding ferric salt and / or ferrous salt and sodium persulfate into the uranium-containing wastewater, controlling the pH value of the solution to be 2-5, heating to 60-95 DEG C, and reacting for 1-3 hours; and 4, the pH of the solution in the step 3 is continuously adjusted to 7-9, filtering separation is conducted after the reaction is conducted for 1-2 hours, uranium-containing iron slag and qualified wastewater are obtained, the uranium content in the qualified wastewater is lower than 0.1 ppm, and the COD value is lower than 100 ppm. The invention aims to realize purification of uranium and removal of COD in uranium-containing wastewater generated in the uranium extraction process.

The invention discloses a system and a method for deeply oxidizing sulfur-containing waste lye at low temperature and normal pressure, and belongs to the technical field of petrochemical wastewater treatment. According to the technical scheme, the method comprises the following steps: 1) preparing peroxide by taking one of sodium persulfate or a mixed solution of ammonium sulfate, hydrogen peroxide and sulfuric acid as a raw material; 2) preparing a peroxide solution, and adjusting the concentration and the pH value; (3) carrying out oxidation reaction on the peroxide and the waste alkali liquor in the presence of a catalyst; the method and the system for deeply oxidizing the waste alkali liquor containing high-concentration S < 2->, phenols and COD (Chemical Oxygen Demand) at low temperature and normal pressure by utilizing peroxide are particularly suitable for the waste alkali liquor with high pH value and complex organic matters, and the problems of high energy consumption and high investment of the traditional high-temperature and high-pressure wet oxidation process are solved.

The invention discloses a method for oxidative degradation of chlorinated paraffin-52 in a solution by using sodium persulfate. The method comprises the following steps: (1) preparing a chlorinated paraffin-52 stock solution; (2) adding an oxidizing agent sodium persulfate; (3) carrying out an oxidation reaction process; (4) collecting a sample; (5) sample pretreatment; and (6) determining the concentration of the sample. According to the method disclosed by the invention, the sodium persulfate and short-chain and medium-chain chlorinated paraffin in the chlorinated paraffin-52 are subjected to oxidation reaction under the oxidation action of the sodium persulfate, C-Cl bonds and C-H bonds of the chlorinated paraffin-52 are destroyed, and the chlorinated paraffin-52 is converted into low-toxicity or non-toxic small organic molecules, so that the concentration of the chlorinated paraffin-52 in the solution is remarkably reduced. In the reaction process of the sodium persulfate and the chlorinated paraffin-52, no auxiliary raw material or catalyst needs to be added, and the removal rate of the chlorinated paraffin-52 reaches 85% or above. Compared with existing traditional repairing, sodium persulfate oxidation has the multiple advantages of being efficient, environmentally friendly, low in cost, easy and convenient to operate and the like.

The invention discloses a method for increasing the leaching rate of refractory gold, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: adding sodium persulfate, sodium percarbonate and ferrous chloride into ore pulp during alkali pretreatment; a gold leaching agent is introduced, the pH value of the ore pulp is adjusted to be within 9-12, gold leaching is conducted, and leaching of refractory gold is completed; the adding concentration of sodium persulfate is 0.01 mol / L-1 mol / L, the adding concentration of sodium percarbonate is 0.01 mol / L-0. 5 mol / L, and the adding amount of ferrous chloride is 50% of the adding amount of sodium persulfate. According to the method, high-activity free radicals are generated through sodium persulfate and sodium percarbonate under the alkaline condition, deep oxidation damage is conducted on an ore inclusion structure, and the leaching efficiency of gold is remarkably improved. Meanwhile, sodium carbonate generated by sodium percarbonate can stabilize the alkaline environment of the solution, the flowability of ore pulp and the contact efficiency of an oxidizing agent and mineral particles are improved, and the leaching efficiency of gold is improved.

The application relates to the technical field of soil remediation, in particular to a device for in-situ remediation of organic contaminated soil, which comprises a power supply, a high-pressure pump, an air extractor and a buried unit, the buried unit comprises a plurality of buried groups which are spaced apart along a first direction alpha, and each buried group comprises a plurality of buried pieces which are spaced apart along a second direction beta; the buried pieces are made of iron and are used for generating ferrous ions to activate persulfate and generate iron ions after the activation reaction; the buried pieces comprise liquid inlet buried pieces and suction buried pieces, the cavities of the liquid inlet buried pieces are communicated with the output end of the high-pressure pump, the high-pressure pump is used for pumping sodium persulfate solution into the cavities of the liquid inlet buried pieces, the cavities of the suction buried pieces are communicated with the input end of the air extractor, and the air extractor is used for sucking water in the soil; the sodium persulfate solution is activated by adopting direct current and an iron-based catalyst, and the organic pollutants in the soil can be effectively degraded.

The utility model belongs to the technical field of waste incineration fly ash treatment, and relates to a softening treatment system for fly ash washing filtrate. Comprising a fly ash pulping tank, a primary washing tank, a decalcification tank, a heavy metal removal tank, an NF device and an MVR system which are connected in sequence, the primary washing tank is connected with the sodium sulfate dispensing tank, the decalcification tank is connected with the sodium carbonate dispensing tank, and the heavy metal removal tank is provided with a heavy metal removal agent feeding port; a concentrated liquid outlet of the NF device is connected to the fly ash pulping tank, and a produced water outlet of the NF device is connected to the MVR system. A primary centrifugal machine is arranged between the primary washing tank and the decalcification tank, a decalcification centrifugal machine is arranged between the decalcification tank and the heavy metal removal tank, a UF device is arranged between the heavy metal removal tank and the NF device, and a heavy metal removal centrifugal machine is arranged between the heavy metal removal tank and the UF device. Through cooperative treatment of sodium sulfate, sodium carbonate and the NF technology, the concentration of sulfate ions and calcium ions is reduced, and the problems that an MVR system is prone to scaling and energy consumption is increased are effectively solved.

The invention discloses a micromolecular oil-based gel breaker as well as a preparation method and application thereof, and belongs to the technical field of product oil pipeline maintenance. The micromolecular oil-based gel breaker is selected from one or two of the following effective components in parts by weight: 1-10 parts of triethanolamine, 1-10 parts of sodium persulfate, 1-10 parts of sodium hydrogen sulfate and 1-10 parts of sodium sulfite, and 80-100 parts of water is used as a solvent. Compared with the existing gel breaker, the small molecule oil-based gel breaker has the advantages that the gel breaking time is shortened by 30-50%, and the shortest time can reach 15 minutes; by using weak acid and weak base, the corrosion to the carbon steel pipeline is low; meanwhile, the gel breaker mainly aims at phosphate aluminum salt gel and alkyl phosphate gel left in the pipeline, depends on the acid-base effect and the oxidation-reduction effect to act respectively or achieve the chemical synergistic effect, the formula of the gel breaker can be selected according to actual requirements, and the pertinence is high; the gel breaker provided by the invention also has the advantages of excellent environmental friendliness and controllable cost.

The present application belongs to the technical field of soil pollution remediation, and particularly relates to a biodegradable sodium persulfate microcapsule, a preparation method and application thereof. The present application mixes an aqueous phase solution formed by chitosan acetic acid aqueous solution and sodium persulfate and an oil phase solution containing an emulsifier, the aqueous phase solution is dispersed in the oil phase in the form of small droplets to form a water-in-oil system, and then cross-linking solidification and organic solvent elution are performed to obtain the biodegradable sodium persulfate microcapsule with chitosan as a wall material and sodium persulfate wrapped therein. Since chitosan has good adsorption, the biodegradable sodium persulfate microcapsule can adsorb polycyclic aromatic hydrocarbon pollutants in soil; the active groups generated by activation of sodium persulfate have strong oxidizing properties and can degrade polycyclic aromatic hydrocarbons; the biodegradable sodium persulfate microcapsule has good slow-release effect, can slow down the severity of the reaction between the active groups and polycyclic aromatic hydrocarbons, and reduce the impact on the soil environment and microorganisms.

The invention discloses a green deplating solution for a photovoltaic welding strip and a valuable metal separation and recovery method. The deplating solution is an aqueous solution, and solutes comprise a main oxidizing agent, a green acidic auxiliary agent, a complexing cosolvent and a copper special corrosion inhibitor; the main oxidant is selected from sodium persulfate, ammonium persulfate and ferric nitrate; the green acidic auxiliary agent is selected from sulfamic acid, methanesulfonic acid, tartaric acid and citric acid; the complexing cosolvent is selected from sodium chloride, ammonium chloride and thiourea; and the corrosion inhibitor is selected from benzotriazole, methyl benzotriazole and 2-mercapto benzimidazole. The waste welding strip is subjected to an immersion reaction at the temperature of 20-60 DEG C, tin, lead and / or silver enter the solution in the form of complex ions, and a copper substrate is kept bright and clean; and after solid-liquid separation, gradient recovery of silver extraction by replacement, lead separation by temperature difference crystallization and tin precipitation by hydrolysis can be adopted, or total replacement recovery by adding excessive zinc-based displacer can be adopted. The separation and recovery method is rapid in deplating, free of white films, low in copper loss and suitable for silver-containing and silver-free solder strips.

The invention provides an electrode assembly for a submarine microbial fuel cell, a preparation method and a device, belongs to the technical field of fuel cells, and solves the technical problem of low synergistic energy supply efficiency of a cathode and an anode of a fuel cell. The co-treatment anode is treated by urea and sodium persulfate; the ternary composite cathode is electrically connected with the co-processing anode through a wire; the co-processing anode releases electrons in seabed sludge through an oxidation reaction of microorganisms on organic matters, and the electrons are transmitted to the ternary composite cathode through a wire; a seabed sludge and seawater interface is used as a natural proton exchange membrane to realize a proton and electron transfer path between the anode and the cathode; the electrode assembly generates a potential difference through electron transfer and redox reaction and outputs energy. The method is suitable for preparing the electrode of the submarine microbial fuel cell.

The invention discloses a preparation method for constructing nitrogen-sulfur co-doped carbon based on corn straw and application of the nitrogen-sulfur co-doped carbon, and belongs to the technical field of carbon material preparation. The method takes carbonized corn straw as a carbon source, isophthalate as an activating agent and a template, benzimidazole as a nitrogen source and sodium persulfate as a sulfur source, and comprises the following steps: firstly, crushing the cleaned corn straw, sieving with a 500-mesh sieve, then carbonizing, washing and drying in a tubular furnace, then uniformly mixing with isophthalate, benzimidazole and sodium persulfate, and carrying out heat preservation for 2-3 hours to obtain a sample; and transferring into a Joule heating furnace, vacuumizing, and heating to obtain the nitrogen-sulfur co-doped carbon. The obtained nitrogen-sulfur co-doped carbon has rich hierarchical pore structures and defect sites, the specific surface area of the nitrogen-sulfur co-doped carbon is between 1325.57 and 2061.99 m < 2 > / g, and the total pore volume of the nitrogen-sulfur co-doped carbon is between 0.89 and 1.36 cm < 3 > / g. The prepared nitrogen and sulfur co-doped carbon is applied to a zinc ion hybrid capacitor, the specific capacitance is 140mAh / g under the current density of 0.1 A / g, and the energy density is up to 246.67 Wh / kg. The method is simple, compared with a tubular furnace, the method can achieve rapid preparation within several seconds, structural collapse of the carbon material in the activation process can be reduced, introduction of doping elements can be increased, and meanwhile resource utilization of agricultural waste corn straw is achieved.

The utility model relates to the technical field of bridge breaking of sodium persulfate, and discloses a vibration bridge breaking structure for a sodium persulfate wet stock bin, which comprises a bin body, a connecting plate is fixedly connected inside the bin body, a first motor is fixedly connected to the lower surface of the connecting plate, an eccentric wheel is fixedly arranged at the output end of the first motor, and a second motor is fixedly connected to the output end of the eccentric wheel. A fixing shaft is fixedly connected to the upper surface of the eccentric wheel, a rotating block is rotatably connected to the outer wall of the fixing shaft, a connecting rod is fixedly connected to the interior of the rotating block, a connecting block is rotatably connected to the outer wall of the connecting rod, a push rod is fixedly connected to the outer wall of the connecting block, and a vertical plate is fixedly connected to the upper surface of a connecting plate. According to the utility model, the first motor is started to drive the eccentric wheel to rotate, and sodium persulfate is vibrated and dispersed by the vibrating plate through the cooperation of the fixed shaft, the rotating block, the connecting rod, the connecting block, the push rod, the wafer and the spring, so that the effect of keeping the sodium persulfate in a loose state all the time through vibration is achieved, and caking and blockage caused by damp are avoided.

According to the preparation method of the metal modified biomass charcoal catalyst and the application of the metal modified biomass charcoal catalyst to pollutant degradation, the catalyst is prepared by adopting a carbonization method, and tetracycline wastewater is degraded by activating persulfate by utilizing the catalyst. Anhydrous ferric trichloride is used as an iron source, sugarcane leaves are used as a carbon source, the raw material ratio of the anhydrous ferric trichloride to the sugarcane leaves to urea to sodium hydroxide to ultrapure water is 810: 5: 25: 12: 30, and the raw materials are uniformly mixed, dried and sieved. And placing the mixture sample in a tubular furnace, and keeping at 800 DEG C for 2 hours to obtain a catalyst sample. The initial concentration of tetracycline hydrochloride is 20 mg / L, the pH value is 7.0, the concentration of sodium persulfate is 0.5 mM, the concentration of the catalyst is 0.1 g / L, and the degradation rate reaches 87%. The conclusion shows that the modified catalyst prepared from the biomass charcoal loaded iron can effectively catalyze persulfate to degrade tetracycline wastewater.

The application relates to the field of electrochemical energy storage technology, and discloses a sodium ion battery and a positive electrode material composed of the following components: graphene with a mass fraction of 5%-20%; transition metal sulfide with a mass fraction of 50%-70%; and ion sieve functional layer material; and a sodium ion battery preparation method, which comprises the following steps: graphene modification and dispersion: graphene powder is dispersed into a suspension through ultrasonic dispersion, and sodium persulfate and nitric acid are added to perform functionalization treatment on the graphene powder; and transition metal sulfide synthesis, which is applied to portable electronic devices, electric vehicles and large-scale energy storage systems. The sodium ion battery is prepared by compounding functionalized graphene and transition metal sulfide, combining the multi-dimensional network design of the ion sieve functional layer and the carbon nanofiber, optimizing the sodium ion transmission, conductivity and thermal management performance, and significantly improving the energy density, cycle stability and safety.