85 results about "Phosphate loading" patented technology

The invention provides a positive pole piece which is characterized by comprising a positive pole current collector, a buffer conducting layer and a positive pole active layer in a sequential stacking mode. The buffer conducting layer comprises phosphate, a first conductive agent and a first binder. The phosphate has the following general formula: LiMPO4, wherein M is selected from one of Fe, Mn and Co or a composite of a plurality of Fe, Mn and Co. The thickness of the buffer layer is 2-50 millimeters, and the grain size of the first conductive agent is smaller than 75 millimeters. In the buffer conductive layer, the phosphate content is 40-90wt%, the first conductive agent content is 5-10wt%, and the first binder content is 5-50wt%. Meanwhile, the invention further discloses a preparation method of the positive pole piece and a battery adopting the positive pole piece. The battery prepared from the provided positive pole piece has good over-charging performance and the safety of the battery is greatly promoted.

An absorbent article of the present invention may comprise a backsheet and a wetness indicator composition. The wetness indicator composition may comprise a stabilizer, a colorant, and a matrix. And, a wetness indicator sample, according to the Wetness Indicator Sample Test (Phosphate), may have a phosphate content of 10% or less. Further, the wetness indicator sample, according to the Wetness Indicator Sample Test (Nitrogen), may have a nitrogen content of 3% or less.

The invention discloses a method for analyzing total phosphorus in an industrial sewage sample, which comprises the following steps of: diluting a sewage sample to a proper concentration; fetching 8ml of the diluted sample, adding 1ml of potassium persulfate solution, and shaking uniformly; covering with a cover under normal pressure at 120 DEG C and heating for 30 minutes; taking out the product and performing water cooling to room temperature; adding 0.3ml of 10% ascorbic acid solution, and adding 0.3ml of molybdate solution; shaking uniformly, and standing for 15 minutes; pouring the product into a cuvette; measuring the absorbance by taking water as a reference in a wavelength of 710nm; and inquiring the content of phosphorus on a working curve after deducting the absorbance of a blank test, wherein the content of phosphate is the phosphorus content inquired from the working curve divided by the volume of the water sample. The method disclosed by the invention overcomes the shortcomings of the prior art, and measures the content of total phosphorus through ultraviolet visible spectrophotometer equipment under normal pressure according to the principle of an ammonium molybdate spectrophotometric method for measuring total phosphorus; and moreover, the operation process of the method is simple, the inspection cost is lowered, the safety is improved, and the result is reliable.

The invention relates to the field of aluminum alloy surface treatment, in particular to an aluminum alloy silicon-free efficient degreasing fluid and a preparation method thereof, which can be used for solving the problem that an aluminum alloy degreasing agent forms gel easily, adheres to the surface of the substrate and is difficult to remove in the presence of silicate in the prior art. The silicon-free efficient degreasing fluid comprises an alkali metal hydroxide, phosphate, a buffering agent, a corrosion inhibiting agent, a surfactant and the like, and comprises the balance of water besides silicate, wherein the pH value is 10-12; the working temperature is 40-60 DEG C; the alkali oxide content is 1-10 g/L; the phosphate content is 8-30 g/L; the buffering agent content is 5-20 g/L;the corrosion inhibiting agent content is 0.5-3 g/L; and the surfactant content 0.5-5 g/L. In the invention, the degreasing fluid is prepared by uniformly mixing alkali metal oxide, phosphate, a buffering agent, a corrosion inhibiting agent, a surfactant and water. The silicon-free efficient degreasing fluid has superior decontamination capability, and can be widely used for cleaning the surfacesof various aluminum alloy workpieces.

The invention provides a compound bacterial agent for purifying a black and odorous water body and a preparation method thereof. The compound bacterial agent comprises the following components: actinomycetes, bacillus subtilis, nitrifying bacteria, lactic acid bacteria, candida utilis and pseudomonas aeruginosa in a weight ratio of 2:2:2:1:1:1. The invention has the following advantages: the COD content, ammonia nitrogen content and phosphate salt in the black and odorous water body can be effectively reduced, and the odor of the black and odorous water body can be eliminated; and meanwhile, by adding the ammonia nitrogen removal strain, the transparency of the water body can be gradually improved.

The invention discloses a multihole calcium carbonate-hydroxyapatite gradient material as well as its preparing method. It converts the calcium carbonate into the base of hydrothermal reaction of the hydroxyapatite and changes the content of the calcium carbonate and phosphate to obtain biomaterials of different conversion ratios. Its surface has a hydroxyapatite thin coat layer and its center has the calcium carbonate- hydroxyapatite with the content gradient 4.5%-33.8%. It has good biocompatibility, high-degree and multihole, and has controllable biodegrading speed.

The invention relates to a method for fast determination of the phosphate content in hairtail surimi and fish paste. The method provided by the invention comprises the following steps: getting a near-infrared spectrum of the phosphate content in the hairtail surimi and the fish paste and predicting the phosphate content in the hairtail surimi and the fish paste. By adopting the method disclosed by the invention, the problem that the existing method for detecting the phosphate content in the hairtail surimi and the fish paste can not detect a large batch of samples in a fast and non-destructive manner can be solved.

The invention discloses a system of detecting contents of nitrite, ammonia-nitrogen, sulfur and phosphate in water based on a camera. The system comprises an acquisition end, a treatment end and a display end, wherein the acquisition end comprises a light source system, a sample cell and the camera; a control chip of the camera is in data connection with the treatment end; and the treatment end isin data connection with the display end. According to the system, the ordinary camera is used for substituting a spectrophotometer for data acquisition; the color strength of a colored matter solution is determined according to a color difference between the solution and a blank sample; image data obtained by the acquisition end is RGB (red, green and blue) color model data; the treatment end converts the RGB color model data into Lab color model data; a color difference value is calculated according to the Lab color model data; a relation curve between the color difference value and a concentration of a detection object is established for measuring a solution with an unknown concentration; and the system is ingenious in design, adopts universal image acquisition equipment, integrates a graphic processing technology and data processing capability of a computer and can be widely applied.

The present invention discloses an inorganic high-temperature resistant and antistatic coating. The coating is mainly prepared from constituents of the following contents (percentages by weight): 30 to 60% of phosphate, 5 to 25% of silicasol, 2 to 10% of boric acid, 25 to 45% of water, 2 to 5% of titanate coupling agent, 8 to 18% of conductive mica powder and 5 to 10% of aluminium powder mixed with zinc oxide. Dihydric phosphate water solution is prepared from the following substances at least, and the phosphate consists of one or several of aluminium dihydrogen phosphate, aluminium hydrogen phosphate, magnesium dihydrogen phosphate, magnesium hydrogen phosphate, zinc dihydrogen phosphate and zinc hydrogen phosphate. The ratio of P to M (M refers to metal elements) in the phosphate is from 1.2 to 2.6. The conductive mica powder and the aluminium powder mixed with zinc oxide are processed by the titanate coupling agent before being added to a base material.

The invention provides a non-phosphorus solid slow-release corrosion inhibitor. The non-phosphorus solid slow-release corrosion inhibitor comprises 20%-30% of boric acid, 25%-35% of borax, 10%-20% of Na2O, 15%-25% of SiO2, 5% of Na2SO4 and 5% of (NH4)6Mo7O24. The corrosion inhibitor provided by the invention is the non-phosphorus corrosion inhibitor, the content of phosphate in water is decreased beneficially, and the eutrophication risk of receiving water is reduced; aiming at the acidic water quality (pH is larger than or equal to three), the medium-high-salinity water quality (the content of Cl- is smaller than or equal to 0.5mol/L) and the medium-high-alkalinity water quality (the content of CaCO3 is smaller than or equal to 250mg/L), the corrosion inhibitor is researched and developed, and corrosion of carbon steel materials in the acidic water quality environment, the medium-high-salinity water quality environment and the medium-high-alkalinity water quality environment can be effectively inhibited; and the corrosion inhibitor belongs to a slow-release medicament, and the corrosion inhibition effect of the medicament lasts for 30 days or more.

The invention discloses a method and kit for utilizing a Mo-Sb antiluminosity method to detect a content of orthophosphate in water. The method comprises blending ammonium molybdate, antimony potassium tartrate and ascorbic acid to make a color developing agent, adding the color developing agent into a to-be-measured water sample to blend the color developing agent, then adding benzene sulfonic acid to enable the pH to be 0-1, fully blending and standing for over 3min, utilizing a spectrophotometer to measure the absorbance at the position of 880nm, and obtaining the content of orthophosphate in the to-be-measured water sample through an absorbance value according to a pre-measured standard curve. According to the method, by improving a strong acid medium, operation in measuring orthophosphate in the Mo-Sb antiluminosity method is simplified, danger is lowered, the detection speed is improved, and field operation is facilitated.

The invention discloses a harmless and recycling integrated treatment system for discharged fecal sewage of a train. The system comprises a pretreatment system, a resource recycling system, a treatment system and a sterilizing system, wherein the pretreatment system is connected with the resource recycling system, the resource recycling system is connected with the treatment system, and the treatment system is connected with the sterilizing system; the pretreatment system comprises an excrement storage pool, a hydrolysis acidification pool and a centrifugal separator; the excrement storage pool is connected with the hydrolysis acidification pool in parallel, and the top of the hydrolysis acidification pool is provided with a water passing pipe which is communicated with the excrement storage pool; a submersible sewage pump is arranged in the excrement storage pool, and the excrement storage pool is connected with the centrifugal separator through the submersible sewage pump; the centrifugal separator is respectively connected with the hydrolysis acidification pool and the resource recycling system through a slag outlet pipe and a water outlet pipe. By adopting the integrated treatment system, not only can the recycling of ammonia nitrogen and phosphate in the fecal sewage be realized, but also the content of ammonia nitrogen and phosphate in the sewage entering the subsequent procedures can be reduced, so that the sewage is easier to treat and likely to reach the standard, and the cost is reduced.

The present invention relates to a chemical oxidation liquid for an aluminum alloy. The chemical oxidation liquid has a pH value of 4.0-6.0 and is composed of the following components of: molybdate, phosphate, fluoride, a manganese compound, organic acid (salt) and water, wherein the molybdate content in the solution is 1.0-15 g/L, the phosphate content is 0.5-10 g/L, the manganese content is 0.1-3 g/L, the fluoride content is 0.5-5 g/L and the organic acid (salt) content is 0.3-5 g/L. The solution provided by the present invention can be produced at room temperature, and is subjected to impregnation treatment to form an oxide film with a good binding force. All components in the chemical oxidation liquid are non-toxic or low-toxicity compounds and are free of heavy metals such as hexavalent chromium, cadmium and lead, and the components in the solution are free of noble metals and are conventional commercial products, so that the cost is low. After the oxidation process, a sealing process is omitted, thus simplifying process, and the production is convenient to control. The solution provided by the present invention can be used for the oxidation treatment of deformed aluminum alloy products such as aluminum alloy profiles.

The invention pertains to a method for treating an effluent to be treated in order to reduce its phosphates content, said method comprising a step of anoxic biological treatment of said effluent to be treated, producing a first effluent, a step of aerobic biological treatment of said first effluent, producing a second effluent, a step of recirculating at least a part of said second effluent to the inlet of said anoxic biological treatment step, a step of liquid/solid separation of at least a part of said second effluent, producing a treated effluent and a first denser effluent, a step for producing volatile fatty acids including a wet heat treatment, at a temperature of 100° C. to 350° C., for a residence time of between 10 and 180 minutes, of at least a part of said first denser effluent, a step of anaerobic biological treatment of at least a part of the effluent coming from said wet heat treatment step, and a step of recirculating at least a part of the effluent coming from said anaerobic biological treatment step to the inlet of said anoxic biological treatment step.

The invention discloses a europium-based coordination polymer nanosphere and a preparation method and application thereof. The preparation method of the europium-based coordination polymer nanosphere comprises the following steps of adding EuCl3.6H2O, H2BDC and polyvinylpyrrolidone to mixed solvent formed by mixing N, N-dimethylformamide and absolute ethyl alcohol, and conducting stirring till the materials are fully dissolved; then, transferring a mixed solution into a reaction still provided with a polytetrafluoroethylene inner container, and putting the reaction still in a drying oven at the temperature of 150 DEG C to leave the reaction still standing still for 12 hours; and then sequentially conducting cooling, centrifugalization, washing and vacuum drying, so that the europium-based coordination polymer nanospheres are obtained. A to-be-detected water body is added to fluorescent material suspension liquid prepared from the europium-based coordination polymer nanospheres; after being mixed uniformly, the materials are left standing still; and then a fluorescence spectrophotometer is adopted for detection, and the content of phosphate in the to-be-detected water body can be obtained. The europium-based coordination polymer nanosphere is stable in performance, not prone to photobleaching, good in water solubility, capable of effectively detecting the content of the phosphate in the water body, simple in synthesis method and low in raw material cost.

The invention provides a method for detecting the content of phosphates of different types in a complex sodium phosphate product, comprising: diluting the complex phosphate product with pure water, eluting the solution in gradient by an ion chromatograph, separating the phosphates of different types in a sample, and determining a response value; preparing four groups of standard solutions of sodium orthophosphate, sodium pyrophosphate, sodium polyphosphate and sodium trimetaphosphate in a concentration range of 2-20mg/L, determining the corresponding area response values of the standard solutions by the ion chromatograph under same conditions, and calculating by the formula FI=cI/SI; selecting a average value of FI of the four groups of solutions of each component, to determine a correction factor of each component, and finally, calculating the content of each component in the complex sodium phosphate products. The product provides a method for simultaneously detecting the content of phosphates of different types in a complex sodium phosphate product by a simple method and a precision apparatus. The detection result is good in repeatability and stability. The method is suitable as a common quantitative analysis method.

The invention provides a nano-dephosphorizer lanthanum carbonate hydrate, La2(CO3)3.nH2O, 1 <= n <= 8. The invention also provides a preparation method of the nano-dephosphorizer lanthanum carbonate hydrate. The method includes steps of: 1) adding an ionic liquid to a metal lanthanum ion solution with stirring to form a mixed solution; 2) adding a precipitant to the mixed solution to perform a precipitation reaction, and performing after-treatment to a reaction product to obtain the nano-dephosphorizer lanthanum carbonate hydrate, which is more than 100 mg/L in maximum saturation adsorption capacity and has strong removal capability on low-content phosphorus components in ecologic water domains, living or industrial wastewater, etc. After treatment, content of phosphates in the water sample can reach national first-level emission standard of phosphates. The nano-dephosphorizer has important significance for alleviating the gaining pressure of phosphorus environment pollution and a problem of daily production and domestic water.

The invention relates to a determination method of phosphates, especially relates to a visual colorimetry for determination of phosphates. The visual colorimetry is used to solve problems of the prior art. The visual colorimetry, which is a novel method for determination of phosphates, needs no expensive equipment, is easy to operate, and can be used to measure the content of phosphates in water. The method comprises the following steps: standard colors are prepared, wherein standard solutions with different amounts of phosphates are subjected to chromogenic reaction, blue complex compounds of phosphomolybdenum blue are produced, photos of the complex compounds with different color shades are taken by an OLYMPUS digital camera, the standard colors are produced by printing, and then each standard color is sandwiched by two piece of glasses with a thickness of 1 to 2mm and is sealed by sealant; corresponding relation of the color of the standard colors and the content of phosphates is revised by subjecting a serious of standard solutions with known concentrations of phosphates to chromogenic reaction, so that deviations of the standard colors in the processes of photographing, printing and sealing are eliminated; and then samples are subjected to chromogenic reaction, and are compared with the standard colors to determine the content of the phosphates of the samples to be determined.

The invention discloses a chromium-free semi-organic insulating coating suitable for Bi-containing ultrahigh magnetic induction oriented silicon steel without a bottom layer. The chromium-free semi-organic insulating coating is prepared from the following raw materials in percentage by weight: 15 to 25 percent of phosphate aqueous solution, 1 to 15 percent of colloidal silicon dioxide or colloidalaluminum oxide or titanium dioxide, 30 to 60 percent of organic resin, 0.5 to 5 percent of metal oxide and the balance of water, wherein in the phosphate aqueous solution, the content of phosphate is33%, and positive ions are any one or more of Mg, Al, Ca, Zn and Na; in the metal oxide, metal cations are any one or more of Mn, Co, Ni, Al, Ca and Na. After being coated, the coating is dried at the temperature of 300-500 DEG C, resin on the surface layer of a steel plate is segregated, an insulating film cannot be damaged, the coating is good in welding performance, and when the welding speedis 80-120 cm/min, bubbles and air holes are not generated at a weld joint.

The invention belongs to the technical field of activated carbon and in particular relates to a preparation method and an application of sunflower seed husk activated carbon. Sunflower seed husks serve as raw materials, a phosphoric acid activation technology is adopted, mesopore activated carbon and micro-pore activated carbon can be prepared by controlling the concentration of phosphoric acid, an activation temperature and a liquid-solid ratio, and the prepared activated carbon is convenient to operate, low in activation temperature and wide in application range. The mesopore activated carbon and micro-pore activated carbon prepared in the invention are mixed according to a certain ratio so as to be used for treating domestic sewage, the ammonia-nitrogen content is decreased by 12.12%, the phosphate content is decreased by 55.56%, the content of COD (Chemical Oxygen Demand) is decreased by 83.56%, and the treatment effect is excellent.

A source of phosphate for agriculture and food industry comprises a phosphate salt in solid form of formula M_n(HPO4)y.zH2O in which M is Na, K, NH4, n=2, and y=1; or M is Ca, n=1, y=1; or M is Al or Fe, n=2, y=3; and in which z is 0, 1 or 2, wherein said phosphate salt has a phosphate content expressed as a P2O5 content of between 30 and 50% by weight of the phosphate salt, and it has a cadmium content lower than 0.40 ppm.

The present invention relates to a process for increasing the phosphate content of starches of genetically modified plant cells in comparison with starches from corresponding wild-type plant cells by introducing a foreign nucleic acid molecule which codes for a soluble starch synthase II. The present invention furthermore relates to the overexpression of this soluble starch synthase II in the genetically modified plant cells. Furthermore, the present invention relates to rice starch and rice flour with improved quality characteristics, to rice grains comprising this rice starch, and to rice plants on which these rice grains grow.

The invention discloses a device and method for realizing autotrophic nitrogen removal and synchronous phosphorus recovery of domestic sewage by using granular sludge with hydroxyapatite as a crystal nucleus, and belongs to the field of sewage treatment. The device comprises a short-cut denitrification coupling anaerobic ammonia oxidation reactor and a side granular sludge treatment reactor. CaCl2 and phosphate are added into the side treatment reactor, hydroxyapatite is formed to promote conversion of anaerobic ammonia oxidation sludge from floc to granular sludge, and after culture for a certain period of time, the sludge is obviously granulated, so that the settling performance of the sludge is improved, retention and high enrichment of anaerobic ammonia oxidation bacteria are facilitated, and therefore, the denitrification contribution rate is improved, and the energy consumption is reduced. Meanwhile, the content of phosphate in the sludge is increased to 20% or above, and recycling of important resource phosphorus can be achieved through regular sludge discharging.