74 results about "Phosphate adsorption" patented technology

The present invention relates to a new iron containing phosphate adsorbent and its use e.g. for treating hyperphosphataemia.

The invention discloses a method for preparing a nitrogen and phosphorus removal adsorbent from sludge of a water plant. The method comprises steps as follows: dewatered aluminum sludge is air-dried, ground, sieved, dried, cooled and then placed in a muffle furnace to be roasted at the temperature of 300 DEG C for 4 h, and activated aluminum sludge is obtained; powdery activated carbon, the activated aluminum sludge and zeolite powder are mixed uniformly in proportion, 100 mL of NaOH with the mass concentration being 2%-3% is added, the mixture is vibrated and modified for 12 h, then dried and taken out to be naturally aged for 2 h, bentonite serving as an adhesive is added for granulation, adsorbent particles are placed in the muffle furnace to be roasted at the temperature of 400 DEG C for 4 h, cooled, washed to be neutral with deionized water and dried at the temperature of 105 DEG C for 2 h, and the adsorbent is obtained. The adsorption material capable of adsorbing nitrogen and phosphorus simultaneously is prepared from the aluminum sludge containing activated carbon and zeolite, the adsorption effect of the aluminum sludge on ammonium and nitrogen in a water body is improved, and good phosphate adsorption performance is kept.

The invention discloses a biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof. The preparation method comprises the following steps of: crushing powder ash air-entrained concrete or defective products of a building block manufacturing factory into particles by using a crusher; sieving to obtain particle materials within different grain size ranges to be used as the biological aerated filter filler. The powder ash air-entrained concrete has the characteristics of small density, high void ratio, large specific surface area and the like, has the characteristics of large phosphate adsorption capacity in water and high loaded microorganism quantity when being used for the biological aerated filter filler, and has the function of simultaneously removing phosphorus and nitrogen.

The invention provides a preparation method and application of a phosphate-group-containing low-molecular-weight water reducing agent for concrete. The preparation method can improve the density of phosphate adsorption groups in the water reducing agent, and the prepared water reducing agent has excellent slump loss resistance, water reducing performance, retarding performance and clay tolerance.The preparation method comprises the following steps: (1) reacting a part of hydroxyl groups in polyether polyol of a specific structure with an alkali metal or alkali metal compound to produce an alkali metal salt of polyether polyol; (2) subjecting the alkali metal salt of polyether polyol and chlorinated polyether of a specific structure to an etherification reaction so as to synthesize a polyether intermediate containing hydroxyl groups; and (3) phosphorylating the hydroxyl groups of the polyether intermediate.

The invention discloses a multifunctional suspended carrier for sewage treatment and a preparation method of the multifunctional suspended carrier, belongs to a material used for water, wastewater, sewage or sludge treatment equipment and particularly relates to a microorganism suspended carrier for water, wastewater or sewage biological treatment. The multifunctional suspended carrier for sewagetreatment is characterized in that aluminum polychlorid production waste residues, quicklime, coal ash and binders are raw materials, and targets are obtained through steps of mixing, curing, drying,granulation, baking and pulverization. The raw materials of the product disclosed by the invention are low-cost industrial wastes, and the resource utilization of the wastes is favorably realized. The main ingredient of the product is aluminosilicate, the aluminosilicate is neutral in water and is favorable for microorganism attaching propagation, phosphoris generated after biological metabolism are fixed on the carrier surface in a phosphate mode, the microorganisms are settled at the bottom of a processor after the phosphate adsorption, and the microorganisms can be always kept in a high-activity state through regularly extracting partial sludge and updating the carrier.

The invention belongs to the field of phosphate-containing sewage treatment, and discloses a method for adsorbing phosphate in sewage by using eggshells. The method comprises the following steps that: first, cleaned and shell-membranes-removed eggshells are dried at a temperature of 102 to 105 DEG C, and are grinded; the grinded eggshells are screened with a sieve of 300 meshes, such that eggshell power with a gain size of less than 300 meshes is obtained; 0.2 to 5g of eggshell powder is added to 50 to 1000mL of sewage with a phosphate concentration of 0.2 to 20mg/L and a pH value of 7 to 10; the resulting mixture is stirred for 8 to 12 hours under a temperature of 10 to 40 DEG C, and with a rotary speed of 50 to 200 rpm, such that the adsorption process is finished. According to the method, the phosphate adsorption is realized with the phosphate absorbability of eggshells. Compared with current common phosphate treatment methods, the method provided by the present invention has characteristics of no secondary pollution, abundant raw material source, low operation cost, and stable phosphate removing effect. The method accords with an environmental protective idea of: restricting waste with waste, and brings in good social benefit and environmental benefit.

The invention relates to high-efficiency phosphorus removal biochar, a preparation method and an application thereof. The preparation method includes the following steps: S1. mixing dolomite powder and pulverized coal to obtain a mixture, then adding the mixture into surplus sludge, shaking, filtering and drying to obtain a solid; S2. pyrolyzing and cleaning the solid at 600-1000 DEG C; and S3. adding the cleaned solid into a rare earth metal salt solution, shaking, filtering and drying to obtain the high-efficiency phosphorus removal biochar. The preparation method fully utilizes the characteristic of high biomass content in surplus sludge, converts the surplus sludge into a high-efficiency adsorbent capable of treating phosphorus-containing wastewater, realizes resource utilization of waste, solves the problem of incomplete treatment of surplus sludge in the traditional method, and simultaneously obtains an environment-friendly product with economic value; and the obtained phosphorusremoval biochar has strong phosphate adsorption capacity, with the phosphate removal rate being above 95%, and the adsorption capacity being above 91mg/g.

The invention discloses a preparation method of a wool fabric with a flame-retardant function. The preparation method comprises the steps of preparing nano composite sol by taking ethyl silicate as a hydrolysis precursor and inorganic phosphate as a flame-retardant additive; adsorbing nano silicon dioxide composite phosphate on the wool fabric through sol-to-gel conversion; carrying out after finishing on the wool fabric by means of the synergistic effect of silicon and phosphorus to obtain a favorable flame-retardant effect. A nano sol-gel finishing technology is adopted in the preparation method, so that the consumption of phosphorous components can be greatly reduced, the flame-retardant efficiency can be increased, and the industrial production can be favorably realized.

The invention relates to a method for preparing a high temperature-resistant bismuth vanadate pigment. The method comprises S1: taking a bismuth vanadate raw material, adding water into the bismuth vanadate raw material, carrying out fast stirring to obtain a dispersion liquid, and adding an acid into the dispersion liquid to adjust pH to 2.0-3.3, S2: after the dispersion liquid is completely dispersed to form slurry, heating the slurry to a temperature of 50 to 100 DEG C at a certain heating rate, and adding a solution containing SiO3<2-> and OH<-> into the slurry drop by drop at the constant temperature in 20-50min until the pH is 12.0-12.5, and S3: adding an acid into the solution to adjust solution pH to 6-7, carrying out precipitation, filtering the precipitates, washing the precipitates, adding the precipitates into a PO4<3->-containing solution, carrying out uniform mixing and carrying out drying to obtain the high temperature-resistant bismuth vanadate pigment. According to the method, pH is adjusted through a simple process, a loose layer-compact layer-loose layer silicon dioxide layer is gradually formed on the surface of the bismuth vanadate and a phosphate is used and is adsorbed in the silicon dioxide layer so that the high temperature-resistant bismuth vanadate pigment is prepared on the surface of a plastic product.

The invention relates to a composite material of formaldehyde in situ absorption and intercalation with assembling function and a preparation method thereof, which pertains to chemical material field. The invention is characterized in that: the components of the invention by weight percentage are 0.1 to 90 percent of diatomite, 0.1 to 90 percent of acid phosphate and 0.1 to 90 percent of organic amine. The invention takes diatomite as carrier and adsorbent, and the diatomite is adsorbed and inlayed with acid phosphate through calcination. The obtained material is reacted with the organic amine to form a layer of organic amine phosphate on the surface of the diatomite; at last, the finished product is obtained by decompression drying, smashing and grinding. The product is characterized by stable chemical properties, high thermal stability, non-volatile property, high reaction activity with formaldehyde and high capture ability for formaldehyde. When being applied to production of wood-based panel, the invention can not only be taken as filler, but also as formaldehyde scavenger, which has no effect on physical properties of the wood-based panel and no secondary pollution.

The present invention relates to a new iron containing phosphate adsorbent and its use e.g. for treating hyperphosphatemia.

The invention relates to a porous interpenetrating network poly N-isopropylacrylamide/zirconium alginate gel ball, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a comonomer solution containing polyethylene glycol; (2) preparing a mixed solution of calcium chloride and ammonium persulfate; (3) dropping the solution obtained inthe step (1) into the mixed solution in the step (2) uniformly, introducing N2 to perform protection, soaking the gel ball after reacting for several times to obtain a porous interpenetrating networkpoly N-isopropylacrylamide/calcium alginate gel ball; and (4) putting the gel ball in the step (3) into a zirconium oxychloride solution, soaking, cleaning, filtering, freeze-drying and finally obtaining the porous interpenetrating network poly N-isopropylacrylamide/zirconium alginate gel ball. The gel ball contains Zr<4+> with extremely strong affinity on anions and a porous structure, so the gelball can effectively adsorb phosphate in water, and the adsorption quantity is up to 46.5 mg-P/G. Moreover, the gel ball has an interpenetrating network structure and higher stability, so even if thegel ball is reused for 5 times, the adsorption capability is only reduced by 8.7 percent.

The invention discloses a preparation method of a phosphate adsorbent with high adsorption selectivity, which specifically comprises the following steps: (1) ultrasonically dispersing modified attapulgite in water to obtain an attapulgite suspension; (2) adding humic acid and zirconium dioxide into the attapulgite suspension, stirring to obtain a mixed material, heating the mixed material in a water bath, and drying and sieving the heated mixture to obtain a mixture A; (3) adding polyhydroxyalkanoate into a volatile organic solvent, stirring until the polyhydroxyalkanoate is completely dissolved in the organic solvent, then adding the mixture A in the step (2) into the organic solvent, and continuously stirring until the mixture A is completely dispersed in the solvent; and (4) when the solution is in a semi-solid state, extruding the solution into a plurality of granular materials, and after the volatile organic solvent in the granular materials is completely volatilized, cleaning anddrying the granular materials to obtain the phosphate adsorbent. The phosphate adsorbent disclosed by the invention has high adsorption selectivity on phosphate.

The invention provides a ruthenium water oxidation catalyst and a preparation method and application of the catalyst. The ruthenium water oxidation catalyst has a structure described as a general formula I. According to a flexible chain in an axial ligand of the ruthenium water oxidation catalyst, the degree of spatial freedom is increased, and the distance between the ruthenium water oxidation catalyst and a light-sensitive agent can be freely adjusted, so that the electron transfer from the catalyst to the light-sensitive agent is regulated. Moreover, according to the ruthenium water oxidation catalyst, a phosphate adsorption group is introduced into the axial ligand, so that the adsorption property of the catalyst is improved, and the catalyst is difficult to desorb.

The invention relates to a forsterite adsorbent for sewage treatment and a preparation method thereof. According to the technical solution, the preparation method comprises the following steps: by taking 50 to 80 percent by weight of forsterite fine powder, 10 to 30 percent by weight of attapulgite clay and 10 to 20 percent by weight of ferroferric oxide magnetic powder as raw materials, adding 50 to 65 percent by weight of a hole-forming agent to the raw materials, and uniformly mixing to obtain a mixture; putting the mixture in a granulator, adding 20 to 30 percent by weight of water to the mixture, and granulating to obtain spherical blanks having a particle size of 3 to 5mm; drying the spherical blanks at 80 to 120 DEG C for 18 to 24 hours and firing at 950 to 1150 DEG C for 1 to 5 hours to obtain the forsterite adsorbent for sewage treatment. The forsterite adsorbent for sewage treatment is cheap and easily available in raw materials, and has the characteristics of simple preparation process and environmental friendliness. The forsterite adsorbent for sewage treatment is large in specific surface area, high in strength and free of modification, and has a good adsorption effect on heavy metal ions and phosphate.

The invention discloses a particle red-mud adsorbent preparing method used for phosphate adsorption and belongs to the technical field of environment treatment. The particle red-mud adsorbent preparing method includes preparing acid-activation neutralized red mud under a certain condition, and preparing particle red-mud absorbent by the acid-activation neutralized red mud, straw powder and hydroxypropyl methyl cellulose under a certain condition. The prepared particle red-mud absorbent is used for adsorbing phosphate adsorption. The particle red-mud adsorbent preparing method is simple and practical, and the prepared particle red-mud absorbent is large in specific surface area, has excellent phosphate adsorption capacity and plays an important role in pollution of red mud, recovery of phosphate and waste treatment by waste.

The invention belongs to the technical field of biochar, and particularly relates to ramie biochar as well as a preparation method and application thereof.The ramie biochar for purifying wastewater is prepared from the following raw materials in parts by mass: 1-2 parts of egg shell powder and 1 part of ramie stem powder; the preparation method of the ramie biochar for purifying wastewater comprises the following steps: weighing 1-2 parts of egg shell powder and 1 part of ramie stem powder, mixing to obtain mixed powder, and uniformly crushing; s3, after crushing, keeping the temperature at 650-800 DEG C for 2-3 hours, and carbonizing to obtain ramie biochar; the prepared ramie biochar is used for removing phosphate in water, the adsorption performance can reach 100%, and the ramie biochar adsorbing phosphate can be directly used as a fertilizer with high added value to be added into soil.

The invention relates to a compound medicine as well as a preparation method and an application thereof. The compound medicine is an effective combination of an auxiliary material polymer shell and aneffective component in the shell, wherein the effective component is a phosphorus binding agent, and the auxiliary material polymer shell is PLGA (poly(lactic-co-glycolic acid) or an other polymer material. The medicine can be used as a medicine for specifically adsorbing phosphorus. Compared with the prior art, the compound medicine has the advantages that the excellent phosphate adsorption performance of lanthanum carbonate is fully used, advantages of being non-toxic, rich in ester bonds and freely soluble in lipid of the polymer material are developed, and the compound nano-medicine of PLGA/lanthanum carbonate which is high in biocompatibility and easy to discharge is prepared. The method has simple preparation process and easily controllable conditions; compared with lanthanum carbonate chewable dosage forms which are used for many years, the compound medicine is more suitable for treating hyperphosphatemia.

The invention discloses a treatment system for removing organic phosphates in electroplating wastewater, which comprises a water collecting well, a coarse rack, a primary sedimentation tank, a pH value regulation tank, a mucus protein-phosphate adsorption reactor, a centrifugal separator, a pH value secondary regulation tank, an aeration oxidation tank, a secondary sedimentation tank and a pure water tank. The system creatively utilizes a rotation net tank filled with Chinese yam and taro chips as a surface contact reaction medium; when the organic-phosphate-containing electroplating wastewater contacts the surface contact reaction medium, the organic phosphates in the wastewater and the mucus proteins are subjected to adsorption reaction under the adsorption actions of the rich mucus proteins contained in the Chinese yam and taro so as to generate a phosphate complex. The complex is insoluble in water, and can be removed by the centrifugal separation operation. Meanwhile, the Chinese yam, taro and the like belong to common crops, and can greatly lower the material cost for wastewater treatment when being used as low-value consumables.

The invention discloses a preparation method and application of shell-straw-based calcium-rich biochar. The invention belongs to the technical field of phosphorus-containing wastewater treatment and recycling. The invention aims to solve the technical problem of low adsorption capacity of an existing adsorbent for treating phosphorus-containing wastewater and recycling phosphorus in water. The preparation method comprises the following steps: step 1, soaking, cleaning, airing, grinding and sieving straws and shells; step 2, uniformly mixing shell powder and straw powder, adding deionized water, and magnetically stirring to obtain mixed gel; step 3, drying the mixed gel, and then carrying out roasting treatment in a nitrogen atmosphere; and step 4, naturally cooling to the room temperature, cleaning, drying, grinding and sieving to obtain the shell-straw-based calcium-rich biochar. The prepared calcium-rich biochar has a remarkable effect on phosphate adsorption, the adsorption capacity of the adsorbent reaches 102.5 mg/g through Ca-P precipitation, hydrogen bonds and electrostatic attraction, and phosphorus-containing wastewater is effectively treated.