311 results about "Phosphate ion" patented technology

The invention relates to bionic matrix hydrogel for constructing bone organs and a preparation method of the bionic matrix hydrogel. The bionic matrix hydrogel is prepared from a bone acellular extracellular matrix, a salmon DNA (Deoxyribose Nucleic Acid) network and a calcium phosphate oligomer under the combination of photo-crosslinking and self-assembly physical crosslinking. The acellular extracellular matrix in the bionic matrix hydrogel can simulate organic components in natural bones, the calcium phosphate oligomer can simulate inorganic components in the natural bones, and sufficient phosphate ions can be provided for biomineralization due to introduction of a DNA network. The biomimetic matrix hydrogel can replace Matrigel to act in bone organoid culture, provide a living environment similar to bone tissue for three-dimensional culture cells, enhance substance exchange and signal transduction between cells, promote proliferation, adhesion and osteogenic differentiation of bone marrow mesenchymal stem cells, and further accelerate the process of biomineralization. The invention provides an optional new material for preparing the functional bone organ.

The invention discloses a positive electrode material of an upward flow type electrochemical dephosphorization system, and the preparation method comprises the following steps: preparing a polyaniline-coated ZIF-8 derived carbon loaded magnesium-aluminum double-metal hydroxide electrode material, and the preparation process comprises ZIF-8 carbonization in a nitrogen atmosphere, aniline oxidation polymerization, and loading of magnesium-aluminum double-metal hydroxide by a coprecipitation method; the electro-adsorption positive electrode material belongs to a polyaniline magnesium aluminum double-metal hydroxide mesoporous synergistic platform in ZIF-8 derived carbon, and has a nano frame with strong pore accessibility and high electrochemical activity; the synergistic process comprises attraction of polyaniline to phosphate ions and trapping of the magnesium-aluminum double-metal hydroxide. The electrode prepared by the method has a unique mesoporous framework, a large number of phosphorus removal sites are obtained on the surface of the electrode, a rapid ion storage behavior mainly based on a capacitance control process is realized on a solid-liquid interface, phosphate in water can be effectively separated in an electro-adsorption system, and the method is a pollution control process with a clear mechanism.

The invention provides a method for degrading organic phosphorus and recycling phosphorus in water in an ozone oxidation system. According to the method, a mode of adding iron or iron salt solution step by step is innovatively adopted, so that the degradation rate of phosphorus-containing organic matters in water, the generation rate of phosphate radicals and the removal of total phosphorus in water are remarkably improved. Besides, the treatment effect is evaluated by monitoring the organophosphorus mineralization rate (taking the generation amount of phosphate radicals as an index) and the removal rate of total phosphorus in water, experiments show that the method can increase the organophosphorus mineralization rate by 30% or above, and the removal rate of total phosphorus reaches 95%. Compared with the conventional one-time addition of iron or iron salt, the method has the advantages that the mineralization rate of organophosphorus and the removal rate of total phosphorus are effectively improved through a step-by-step addition strategy, the direct precipitation of an organophosphorus intermediate product is promoted, the use amount of ozone and the addition amount of iron are remarkably reduced, the reaction time is greatly shortened, and the recovery efficiency of phosphorus resources is further improved. The method is low in cost and suitable for advanced treatment of organic phosphorus-containing wastewater in the industries of pesticides, electroplating and the like.

The invention belongs to the technical field of wastewater treatment, and particularly relates to multi-element doped synergistically modified ferrihydrite as well as a preparation method and application thereof, and the ferrihydrite is doped with at least one rare earth element and at least one of an aluminum element and a silicon element; the doping amount of the rare earth elements in the ferrihydrite is 0.5-20wt%; the doping amount of the aluminum element in the ferrihydrite is 0-20wt%; the doping amount of the silicon element in the ferrihydrite is 0-20wt%. Compared with the prior art, the method solves the problems that in ferrihydrite single-element modification in the prior art, although stability is improved through Al / Si doping, element modification in the same period is limited in improvement of the adsorption capacity, and the specific recognition capacity on phosphate radicals cannot be improved; and the anti-interference performance of the rare earth doped in the complex water matrix still needs to be improved. According to the scheme, rare earth and Al / Si doping are combined, so that improvement of phosphorus adsorption stability, adsorption capacity, specific recognition capability and anti-interference performance of ferrihydrite is realized synergistically.

The invention relates to the technical field of bone tissue materials, and discloses a metal-doped biomimetic mineralized dECM cryogel and a preparation method and application thereof.The preparation method of the cryogel comprises the steps that firstly, hyaluronic acid and methacrylic anhydride are mixed in a solvent, the pH value is adjusted, a reaction is conducted, and methacrylic acid hyaluronic acid is obtained; then under the condition of a photoinitiator, mixing the methacrylic acid hyaluronic acid with an acellular extracellular matrix, and performing freezing and crosslinking treatment to obtain the cryogel, and finally, soaking the cryogel in a mineralization solution containing Ca < 2 + > and / or Mg < 2 + >, adding a buffer solution containing phosphite ions, incubating, and washing to obtain the crystal gel. The biomimetic mineralized dECM cryogel prepared by the method disclosed by the invention is good in ion release stability, can significantly improve the migration ability of HUVECs, contributes to promoting proliferation of rMSCs and improving the osteogenic differentiation potential of the rMSCs, and can be used for regeneration and repair of bone defects.

An electrolyte membrane for a battery that cycles lithium ions includes a sulfide-based solid electrolyte, a polymer binder, an inorganic filler, an inorganic lithium salt, and an ionic liquid. The sulfide-based solid electrolyte includes lithium sulfide (Li2S) and at least one element selected from the group consisting of phosphorus (P), tin (Sn), silicon (Si), germanium (Ge), boron (B), gallium (Ga), and aluminum (Al). The ionic liquid includes substantially equimolar amounts of a cation and an anion. The cation includes a complex of lithium (Li+) and an ethylene glycol dimethyl ether, an imidazolium ion, a piperidinium ion, a pyrrolidinium ion, an ammonium ion, a phosphonium ion, or a combination thereof. The anion includes an arsenate ion, a phosphate ion, a sulfonylimide ion, a borate ion, a chlorate ion, or a combination thereof.

The invention relates to the field of fertilizers, in particular to a special fertilizer for disease-resistant crops and a preparation method thereof.The special fertilizer comprises a nutrient core, a microbial agent coating and a medium trace element coating from inside to outside; the nutrient core comprises the following components in parts by weight: 35-40 parts of a nitrogen fertilizer, 20-25 parts of a phosphate fertilizer, 15-20 parts of a potassium fertilizer, 3-5 parts of a synergist and 1-1.5 parts of molasses; the microbial agent coating layer comprises 1-2 parts of a liquid microbial solution, 1-2 parts of a microbial protective agent and 3-5 parts of a microbial agent carrier; the medium trace element coating layer comprises 5-10 parts of a medium trace element fertilizer and 0.8-1.6 parts of a coating agent. According to the disease-resistant crop special fertilizer provided by the invention, the medium trace elements are added in an external wrapping manner, so that the condition that the effectiveness of nutritional ingredients is reduced due to chemical reaction between metal cations of the medium trace elements and phosphate ions in a phosphate fertilizer in a fertilizer production process is avoided.

The invention belongs to the technical field of preparation of phosphorus removal agents, and particularly relates to a composite phosphorus removal agent and a preparation method and application thereof. The composite phosphorus removal agent comprises a honeycomb carrier and microspheres, the microspheres are loaded on the honeycomb carrier; the microspheres are prepared from the following raw materials: polyvinylidene fluoride particles, graphene oxide, ZrOCl2 and phosphorus-accumulating bacteria. The composite phosphorus removal agent comprises a honeycomb carrier, microspheres and microcapsules, wherein the microspheres and the microcapsules are loaded on the honeycomb carrier; capturing phosphate radicals in a water body by the microspheres and carrying out biological phosphorus removal and adsorption phosphorus removal; the honeycomb carrier also has the effect of adsorbing phosphate; and the two synergistically remove phosphate in the water body, so that the phosphorus removal effect of the phosphorus removal agent is improved, and the burden of the water body is not increased.

The invention provides a novel D-A-D type fluorescent probe material as well as a preparation method and application thereof. The fluorescent probe material has good stability, the preparation process is simple, and the synthesis condition is mild. Moreover, the D-A-D type fluorescent probe material has good solubility and stability, and a complex of the D-A-D type fluorescent probe material and zinc ions can identify pyrophosphate ions with high selectivity and high sensitivity. The interference of phosphate ions, hydrogen phosphate ions, dihydrogen phosphate ions, fluorine ions, chloride ions, nitrate ions, acetate ions, sulfate ions and carbonate ions is avoided; after the zinc ion complex of the D-A-D type fluorescent probe material is combined with PPi, the fluorescence intensity is remarkably enhanced, the D-A-D type fluorescent probe material has a higher signal-to-noise ratio, in-situ imaging detection of a target object in living cells or tissues is realized, the defects of a traditional molecule and ion detection method are overcome, and the D-A-D type fluorescent probe material is suitable for being widely applied to the field of biological imaging. # imgabs0 #

The invention discloses a repairing agent for repairing a heavy metal polluted solution by strengthening enzymatic phosphate precipitation under an acid rain condition, the repairing agent comprises sodium alginate, phytase and sodium glycerophosphate, and the mass ratio of the sodium alginate to the phytase to the sodium glycerophosphate is (1-3): (2-5): 50. The invention further discloses a method for repairing a heavy metal polluted solution by adopting the repairing agent. The repairing agent disclosed by the invention has the characteristic of higher enzyme activity when being applied under an acid rain condition, phosphate ions required by phosphate precipitation can be formed, and the repairing agent is remarkably beneficial to strengthening the stability of the precipitation; the heavy metal ions are adsorbed through functional groups carried on the surface of sodium alginate, removal of the heavy metal ions in the solution is accelerated, the risk of migration and diffusion of the heavy metal ions can be greatly reduced, and favorable conditions are created for improving the curing efficiency.

The invention relates to the technical field of sewage defluorination, and discloses a sewage defluorination method for enhancing coagulative precipitation by using residual activated sludge microorganisms, which comprises the following steps: (1) activated sludge microorganism adsorption; (2) removing fluorine by coagulating sedimentation and microbial flocculation; the method comprises the following steps: (1) a polymerization stage: adding a fluorine removal agent into a coagulative precipitation tank, and carrying out mixed reaction on the fluorine removal agent and fluoride, phosphate ions and the like in sewage to form a polymer; (2) a flocculation stage: adding cation PAM and activated sludge microorganisms into a coagulative precipitation tank, and further performing chemical flocculation and microbial flocculation; (3) a precipitation stage: chemical sludge and biological sludge generated in the coagulative precipitation tank are precipitated to realize sludge-water separation, and the sludge is discharged to a sludge storage tank; and (3) sludge dewatering. According to the method, the reutilization of residual activated sludge microorganisms of a sewage plant is realized, and the fluorine removal effect of a conventional coagulating sedimentation method is enhanced through adsorption of the activated sludge microorganisms on fluorides and microbial flocculation.

The invention belongs to the technical field of fluorescent sensing materials, and particularly relates to a ratio metering type fluorescent probe based on a metal organic framework (MOF) material as well as a preparation method and application of the ratio metering type fluorescent probe. The probe material emits blue light, after 2, 6-dipicolinic acid (DPA) is added, the DPA enhances fluorescence emission of Tb < 3 + > and inhibits emission of coumarin through an antenna effect, the fluorescence intensity ratio (I548 / I429) between two emission bands is changed, a good linear response relation is shown in the concentration range of 0-90.0 mu M, the detection limit is 0.13 mu M, and high-sensitivity ratio type detection of the DPA is achieved. After detection is finished, phosphate radical (PO4 < 3->) ions are added, so that the antenna effect can be effectively quenched, the initial fluorescence state is recovered, and meanwhile, the method can be used for detecting the concentration of phosphate radicals. After DPA is added again, reactivation can be realized, so that recycling can be realized, and the limitation of disposable use of a traditional fluorescent probe is broken through.

The present solution provides a preparation method for a three-dimensional structured ferrous phosphate pigment with corrosion early warning capability, including following steps: preparing a ferrous ion-containing solution for providing ferrous ions, where the ferrous ion-containing solution includes a soluble ferrous salt and a surfactant but no oxidizing ions, and the ferrous ion-containing solution is maintained in an acidic environment; preparing an initial mixed solution for providing phosphate ions and ammonium ions; and performing ultrasonic refinement, heating, and holding on the intermediate mixed solution using an auxiliary device with ultrasonic oscillation and microwave heating functions to obtain a final mixed solution; and filtering out precipitates from the final mixed solution, and then transferring the precipitates to a vacuum environment for high-temperature heating treatment to obtain a three-dimensional structured ferrous phosphate pigment with corrosion early warning capability.

The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a method for separating molybdenum and rhenium from molybdenum smelting waste acid by using resin, which comprises the following steps: adding a phosphorus source into the molybdenum smelting waste acid, and then adjusting the acidity to an acid environment in which the hydrogen ion concentration is greater than or equal to 1mol / L; molybdenum and rhenium in the molybdenum smelting waste acid with the acidity adjusted are separated through weak-base anion exchange resin, and a rhenium product with the lower molybdenum impurity content is obtained. According to the method, the phosphorus source is added into the molybdenum smelting waste acid, so that phosphate ions are hydrolyzed from the phosphorus source, molybdenum can be effectively prevented from being adsorbed by the alkalescent anion exchange resin, the selectivity of the anion exchange resin to rhenium is greatly improved, and the rhenium recovery rate and the molybdenum-rhenium separation effect are improved; the problems that in the prior art, ion exchange resin is difficult to adapt to molybdenum-rhenium separation under the high molybdenum concentration, the rhenium recovery rate is low, the rhenium-molybdenum separation effect is poor, and a high-molybdenum-concentration solution cannot be treated are solved.

The invention relates to a preparation method of iron phosphate, and discloses low-sulfur porous iron phosphate and a preparation method thereof. The preparation method of the low-sulfur porous iron phosphate comprises the following steps: providing a mixed solution which contains iron ions, phosphate ions and sulfuric acid; controlling the temperature of the mixed solution to be 60-80 DEG C, and preserving heat and aging for 10-20 hours to obtain slurry containing iron phosphate; extracting a solid from the slurry and washing for multiple times; the washed solid is subjected to microwave drying, the drying temperature is set to be 350-400 DEG C, and the frequency is set to be 2400-2500MHz. The preparation method is short in technological process and low in energy consumption, and the prepared iron phosphate is low in sulfur content, is of a porous structure, is applied to a battery, facilitates permeation of an electrolyte and intercalation and deintercalation of lithium ions, and can enable the battery to have high circularity.

The invention discloses a novel bacillus, the preservation number of which is CGMCC (China General Microbiological Culture Collection Center) No. 1.62901, and the preservation date of which is September 20, 2024. Gene identification shows that the strain belongs to a new microbial species in taxonomy. Researches show that the strain has nitrogen fixation capacity, can grow in a Mengjinna inorganic phosphorus culture medium, exerts phosphorus dissolving capacity, converts insoluble phosphorus elements which are difficult to absorb and utilize by organisms into dissolved phosphate ions which can be efficiently absorbed and utilized by plants, and provides a large number of nutrient substances for crop production; in addition, the strain has good endurance capacity to low-temperature and high-salt environments, and can play an environment restoration function in the low-temperature environments or saline-alkali areas. Therefore, the novel bacillus disclosed by the invention has better application potential and prospect in the aspects of agricultural production (microbial phosphate solubilization) and environmental restoration.

The invention provides a resource utilization method of a lithium-containing mother solution and a resource utilization device of the lithium-containing mother solution. The resource utilization method of the lithium-containing mother liquor comprises the following steps: providing the lithium-containing mother liquor containing lithium ions and sulfate ions; mixing the lithium-containing mother solution with a phosphate solution, and performing lithium precipitation treatment to obtain lithium-containing slurry; carrying out solid-liquid separation treatment on the lithium-containing slurry to obtain pre-adsorption liquid and a first solid material; adsorbing lithium ions in the adsorption pre-solution by adopting a titanium adsorbent to obtain an adsorption tail solution; and carrying out concentration and crystallization treatment on the adsorption tail liquid, wherein the ratio of the amount of substance of lithium ions in the lithium-containing mother solution to the amount of substance of phosphate ions in the phosphate solution is 3: (0.7-0.8). The resource utilization method of the lithium-containing mother liquor can improve the lithium recovery rate and the purity of the recovered product.

The invention discloses a cobalt-free lithium-rich manganese-based positive electrode material based on bulk phase anion doping modification and a preparation method thereof, the chemical formula of the positive electrode material is 0.7 LiNi < 1-x > Mn < x > O < 2-0.3 > Li < 2 > Mn < O3 >, x is greater than 0 and less than 1, and the molar doping amount of PO4 < 3-> is 0.5-3%. The preparation method comprises the following steps: dissolving a nickel source, a lithium source, a manganese source and phosphate in deionized water to prepare a metal ion mixed solution, adding a dispersing agent, and uniformly stirring to obtain a dispersed solution; dissolving a complexing agent into deionized water to obtain a complexing agent solution; adding a complexing agent solution into the dispersion solution, and uniformly stirring to obtain a mixed solution; and carrying out spray drying and sintering to obtain the positive electrode material. The positive electrode material is a cobalt-free lithium-rich manganese-based positive electrode material which is doped with phosphate ions in a bulk phase or co-doped with the combination of the bulk phase and the body surface, so that the first coulombic efficiency of 0.1 C of the positive electrode material can reach about 80%, the capacity retention rate of 1C can reach 90% or above, and the positive electrode material has excellent electrochemical performance.

The invention discloses a method for preparing ferromanganese phosphate MnxFe (1-X) PO4, which comprises the following steps of: mixing a manganese pyrophosphate complex solution and an iron phosphate complex solution, and decomplexing to form ferromanganese phosphate precipitate; wherein the manganese pyrophosphate complex is formed by manganese III ions and pyrophosphoric acid; the iron phosphate complex is formed from phosphate ions and iron III ions. According to the preparation method of the ferromanganese phosphate, the ferromanganese phosphate product can be stably obtained, and the proportion of Mn to Fe in the ferromanganese phosphate can be adjusted according to needs.

The invention relates to the technical field of compound fertilizers, in particular to a slow-release long-acting compound fertilizer and a preparation method thereof. According to the slow-release long-acting compound fertilizer, N-isopropylacrylamide modified carrageenan-humic acid is used as a carrier material to wrap a nitrogen-phosphorus-potassium fertilizer to form an inner-layer compound, and an outer layer is a nano-hydroxyapatite-molecular sieve doped phenyl silicone resin composite material. After being applied into soil, the outer layer material is slowly degraded to form micropores under the action of pH value, water and microorganisms, and water permeates into the micropores. N-isopropylacrylamide in the inner layer has temperature responsiveness, molecular chains shrink at high temperature to accelerate release of nutrients, and the molecular chains stretch at low temperature to slow release. The outer molecular sieve can temporarily store nutrient ions, and hydroxyapatite is degraded to release phosphate ions. A hydrogen bond network is formed between the inner and outer layers to enhance structural stability and regulate nutrient release. In the release process, nutrient ions need to break through a hydrogen bond network and generate reversible ion exchange with the molecular sieve, and accurate regulation and control of nutrient release are achieved.

The utility model relates to the technical field of organic wastewater treatment, and discloses a magnesium-carbon primary battery reaction tank which comprises a reaction tank, a water inlet pipe is arranged inside the left side of the reaction tank, a water outlet pipe is arranged inside the right side of the reaction tank, and a first slag discharge tank and a second slag discharge tank are arranged inside the upper side of the reaction tank. A negative plate magnesium plate and a positive plate carbon plate are arranged in the reaction tank, a sludge scraper is arranged in the reaction tank, and the bottom end of the water inlet pipe is fixedly connected with a sludge accumulation hopper. According to the utility model, magnesium ions react with ammonia nitrogen and phosphate in the wastewater to generate magnesium ammonium phosphate precipitates, so that multiple purposes are realized, the content of hydrogen ions in the wastewater is reduced, the acidity of the wastewater is relieved, the content of ammonia nitrogen and phosphate ions is directly reduced, and the production cost is reduced. The burden of nitrification, denitrification and biochemical phosphorus removal of a subsequent biochemical system is relieved, and meanwhile, the dosage of phosphorus removal in deep treatment is reduced.

The invention discloses a preparation method of a compact-structure and high-compaction type iron phosphate material, and relates to the technical field of lithium ion, and the preparation method comprises the following steps: S1, mixing iron phosphate slag obtained after lithium extraction of a battery with iron phosphate waste, and dissolving in a sulfuric acid solution to obtain a solution A; s2, adding an alkaline solution to adjust the pH to generate a precipitate B; s3, dissolving in a sulfuric acid solution to obtain a solution C, and filtering to obtain ferrophosphorus liquid; s4, adding a phosphoric acid solution to obtain a mixed solution; s5, adding deionized water; s6, raising the temperature, reacting until the solution is converted into white suspension, and keeping the temperature to obtain an iron phosphate dihydrate precursor; s7, drying the iron phosphate dihydrate precursor at the temperature of 100-200 DEG C, and then calcining at the temperature of 400-600 DEG C for 2-5 hours to obtain anhydrous iron phosphate; according to the method, ferrophosphorus liquid is adopted, iron ions and phosphate ions are provided, the pH and the concentration of a system are adjusted, and the iron phosphate material with a compact structure is obtained through programmed heating.

The invention provides a method for preparing a MnCo2O4 catalyst from a phosphate radical modified precursor and application of the MnCo2O4 catalyst, uniform doping of phosphate radical ions in a MnCo2O4 crystal is realized through a synergistic effect of molecular modification and subsequent calcination of a phosphate radical functional group on a cobalt-manganese hydroxide precursor, so that the defects of surface modification are fundamentally overcome, and the application range of the MnCo2O4 catalyst is widened. The method has the advantages of simple preparation process, short reaction time, mild conditions, strong controllability and good repeatability, and is suitable for the fields of efficient water treatment and environmental restoration. Phosphate radical impregnation is carried out at the cobalt manganese hydroxide precursor stage, so that phosphate radicals enter an MnCo2O4 spinel bulk phase structure in the subsequent calcination process, stable bulk phase modification is realized, and the thermal stability and structural integrity of the material are remarkably improved; phosphate radicals have an adjusting effect on a metal cation coordination environment, valence optimization of Mn and Co can be induced in the calcination process, the proportion of Mn < 3 + > / Mn < 4 + > and balance of Co < 2 + > / Co < 3 + > are improved, and the material has more high-activity sites capable of participating in persulfate activation reaction.

The application discloses a vaccine and a preparation method thereof, and the preparation method comprises the following steps: mixing an acidic protein antigen solution containing a phosphate buffer solution with an aluminum adjuvant to make the molar ratio of phosphorus and aluminum below 0.9, so as to obtain an acidic protein vaccine; or mixing the aluminum adjuvant with a solution containing phosphate ions to make the molar ratio of phosphorus and aluminum above 0.2, and then mixing the aluminum adjuvant with an alkaline protein antigen solution containing a phosphate buffer solution, so as to obtain an alkaline protein vaccine; wherein the acidic protein antigen is any kind of protein antigen with a net negative charge; and the alkaline protein antigen is any kind of protein antigen with a net positive charge. According to the preparation method, the molar ratio of phosphorus and aluminum is adjusted to a specific range according to the net charge of the protein antigen, so that the isoelectric point of the aluminum adjuvant can be effectively changed, the charge carried by the aluminum adjuvant is opposite to the charge carried by the protein antigen, and then the aluminum adjuvant and the protein antigen are attracted to each other through electrostatic interaction. The vaccine antigen prepared by the method has high antigen adsorption rate and good stability, the preparation method is simple, and the method is suitable for industrial application.

The invention provides a sulfur-pyrite synergistic nitrogen and phosphorus removal composite filler as well as a preparation method and application thereof. The sulfur-pyrite synergistic nitrogen and phosphorus removal composite filler is of a three-dimensional porous structure prepared by melting and granulating sulfur and pyrite. Firstly, pyrite powder is subjected to acidification pretreatment, surface oxides are washed away, the pyrite powder is added into molten sulfur after being dried and screened, the pyrite powder is rapidly stirred to be uniform, and the pyrite powder is naturally cooled to be prepared into composite particles. Sulfur and pyrite with the main component of FeS2 in the composite filler serve as electron donors for autotrophic denitrification, iron ions generated through oxidation can react with phosphate radicals to form iron phosphate precipitates, and therefore the purpose of synchronous nitrogen and phosphorus removal is achieved.

The present invention refers to a process for producing white UV-absorbing surface-reacted calcium carbonate doped with a titanium species, comprising the steps of providing a calcium carbonate-comprising material, a calcium phosphate selected from monocalcium phosphate and / or dicalcium phosphate, and at least one titanium comprising substance, treating the calcium carbonate-comprising material with the calcium phosphate in an aqueous medium to form an aqueous suspension and grinding the aqueous suspension at a pH value of at least 4.2 to form an aqueous suspension of surface-reacted calcium carbonate, wherein the calcium carbonate-comprising material and the calcium phosphate in combination have a calcium ion to phosphate ion molar ratio (Ca2+:PO43−) in the range from 1.75:1 to 100:1, and wherein the at least one titanium comprising substance is added before and / or during and / or after the treatment step and / or before and / or during the grinding step.

The application discloses a PO4 3‑ and a preparation method of a flame-retardant epoxy acrylate coating layer of 8-OQ intercalated zinc-aluminum hydrotalcite, and the coating layer. Phosphate ions are intercalated between layers by using the ion-exchangeability between layers, and other intercalation agents are used to increase the intercalation rate of phosphate ions before the phosphate ions are embedded into the layers. 8-hydroxyquinoline as an intercalation agent can effectively expand the interlayer spacing of hydrotalcite, and provide more space for anion exchange. The Zn / Al-PO4 3‑ -LDHs intercalated with 8-hydroxyquinoline has the optimal flame-retardant and mechanical properties of the coating layer of the EA compound system. The hydrotalcite can make the carbon layer more uniform, more dense and more solid, and increase the carbon content of the coating layer, so as to improve the flame retardancy and thermal stability of the composite coating, and provide a new method for the research on the hydrotalcite modified EA fireproof coating.

The invention relates to a vertical flow biological induction dephosphorization system and a dephosphorization process. The system comprises a reactor body, an inner barrel and an outer barrel, wherein the inner barrel and the outer barrel form an inner reaction cavity and an outer reaction cavity; the flow guide device is communicated to the axial bottom end of the inner cylinder; the aeration device is arranged in the flow guide device and is used for aerating upwards; and the dephosphorization agent adding device is used for adding a dephosphorization agent while crushing particles below the flow guide device. By additionally arranging a dephosphorization agent adding device, large-particle-size anaerobic ammonia oxidation particles are crushed, a dephosphorization agent is added at the same time, an alkaline environment created by hydroxyl radicals generated by anaerobic ammonia oxidation reaction and microorganisms are used for synergistically promoting a dephosphorization path, a biological induced crystallization reaction is enhanced, and the dephosphorization effect is improved. According to the invention, calcium and magnesium ions are added into the phosphorus removal agent, the excessive calcium and magnesium ions and phosphate ions in the sewage are promoted to be subjected to a crystallization reaction, the free phosphate ions are converted into phosphorus-containing precipitates, the purposes of phosphorus removal and phosphorus resource recovery can be achieved, the dosage of alkaline agents in the phosphorus removal agent can be reduced, and considerable economic benefits are achieved.

The invention discloses a sustained and controlled release value-added fertilizer containing a bioactive carrier and a preparation method of the sustained and controlled release value-added fertilizer, and belongs to the technical field of sustained and controlled release fertilizers. The slow / controlled-release value-added fertilizer is prepared by compounding a bioactive carrier and an NPK compound fertilizer, wherein the bioactive carrier is prepared from three parts, namely a charcoal-layered double-metal hydroxide composite base material, interlayer intercalation phosphate radicals and surface-loaded humic acid. High-amount uniform loading of layered double hydroxides on the surface of biochar is achieved through a hydrothermal in-situ growth technology, phosphate radicals are stably embedded between layers in a subject-object composite mode, and a humic acid active component is combined to form a novel value-added fertilizer with multiple functions of nutrient slow release, soil improvement and growth stimulation. The fertilizer utilization rate is effectively improved, and the nutrient loss risk is reduced.

The present invention relates to a polishing liquid, and in particular to a polishing liquid for aluminum alloy surface treatment. The polishing liquid for aluminum alloy surface treatment provided by the present invention adopts an alkaline polishing liquid instead of an acidic polishing liquid, thereby avoiding the pollution such as toxic yellow gas generated in the polishing liquid, and also reducing the water pollution generated by phosphate ions and other problems. The polishing liquid for aluminum alloy surface treatment of the present invention is characterized in that the polishing liquid is formulated from the following components: sodium hydroxide, sodium nitrate, a corrosion inhibitor, a surfactant, magnesium sulfate, and the balance is water. Among them, the corrosion inhibitor is composed of glycerol and sodium tungstate, and the surfactant is composed of sodium gluconate and sodium dodecyl sulfate. The reflectivity of the 6060 aluminum alloy after polishing with the polishing liquid of the present invention is 96-99.8%, and the weight loss per unit area of ​​the aluminum alloy plate surface after polishing is 7.8-11.6 g / m 2 , the polishing effect is excellent and the polishing process is environmentally friendly.