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175 results about "Perchlorate" patented technology

A perchlorate is a chemical compound containing the perchlorate ion, ClO⁻₄. The majority of perchlorates are commercially produced salts. They are mainly used for propellants, exploiting properties as powerful oxidizing agents and to control static electricity in food packaging. Perchlorate contamination in food, water, and other parts of the environment has been studied in the U.S. because of its harmful effects on human health. Perchlorate reduces hormone production in the thyroid gland.

Device and process for recycling perchlorate in firework and cracker waste

The invention discloses a device and a process for recycling perchlorate in fireworks and crackers waste, the process comprises the steps of first-stage washing, first-stage solid-liquid separation, concentration, second-stage washing, second-stage solid-liquid separation and crystallization, the separation, recovery and resource utilization of the perchlorate, aluminum powder and other substances in solid waste can be realized, meanwhile, the waste residue is subjected to innocent treatment, and the recycling of the perchlorate in the fireworks and crackers is realized. The pollution to the environment is reduced; and in the crystallization step, a low-temperature evaporation space is divided into a plurality of units, and the negative effects of overhigh evaporation temperature and sudden temperature increase of perchlorate can be effectively avoided in a manner of changing positions of the cells.
Owner:HUNAN HUAKE ENVIRONMENT DETECTION TECH SERVICES CO LTD

Low-temperature aqueous electrolyte for anchoring I < + > ions based on double-coordination structure and low-temperature four-electron aqueous zinc-iodine battery

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a low-temperature aqueous electrolyte for anchoring I < + > ions based on a double-coordination structure and a low-temperature four-electron aqueous zinc-iodine battery. The low-temperature aqueous electrolyte is a mixed solution of a zinc salt, an electrolyte additive and water, and the low-temperature aqueous electrolyte comprises 2-5 mol / L of the zinc salt and 0.3-0.6 mol / L of the electrolyte additive; the zinc salt is zinc perchlorate or zinc tetrafluoroborate. The low-temperature four-electron aqueous zinc-iodine battery comprises the low-temperature aqueous electrolyte. Compared with the prior art, the invention at least has the following beneficial effects: (1) the corrosion risk caused by chloride ion concentration is reduced; (2) efficient four-electron iodine positive electrode reaction is realized; and (3) obtaining the low-temperature four-electron aqueous zinc-iodine battery.
Owner:HANGZHOU INST FOR ADVANCED STUDY UCAS

Systems comprising multiple catalysts for catalytically removing oxidized contaminants from a fluid and related methods

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.
Owner:THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA +1

Hydrated eutectic electrolyte and preparation method and application thereof

The invention provides a hydrated eutectic electrolyte as well as a preparation method and application thereof. The electrolyte comprises water-soluble zinc salt, deionized water and a deep eutectic solution, the deep eutectic solution is formed by mixing zinc perchlorate and a polar deep eutectic solvent and performing deep eutectic crystallization. The electrolyte has the characteristics of low water activity, low freezing point and efficient induction of uniform deposition of zinc, can be compatible with an iodine-loaded positive electrode and can inhibit dissolution of iodine, and the characteristics are beneficial to inhibition of hydrogen evolution reaction, polyiodine shuttling and other side reactions in the battery circulation process, promote uniform deposition of zinc, protect the integrity of an iodine electrode, and improve the electrochemical performance of the battery. The stable operation of the zinc-iodine battery is ensured; the electrolyte is a zinc sulfate solution containing a ZnClO4 / dimethyl sulfoxide deep eutectic solvent, the solution is combined with free water to form a eutectic structure, the eutectic structure participates in construction of a Zn < 2 + > ion solvation shell, extra intramolecular hydrogen bonds are introduced for the electrolyte, meanwhile, hydrogen bonds among water molecules are weakened, so that the internal energy of the electrolyte is enhanced, the freezing point is reduced, and the flowability is improved.
Owner:GUANGDONG UNIV OF TECH

Method for efficiently removing perchlorate in wastewater based on quaternary ammonium salt assisted ultrafiltration

The invention discloses a method for efficiently removing perchlorate in wastewater based on quaternary ammonium salt assisted ultrafiltration, which comprises the following steps: adding quaternary ammonium salt with the carbon chain length of C12-C16 into perchlorate wastewater, enabling quaternary ammonium cations and perchlorate to form nanoscale floc through hydrophobic interaction, electrostatic attraction and Van der Waals force, and filtering through an ultrafiltration membrane to obtain the perchlorate. The high-selectivity and high-efficiency removal of the perchlorate in the wastewater is realized. The method is simple and convenient to operate, can be completed only by adding trace quaternary ammonium salt and combining the trace quaternary ammonium salt with a conventional ultrafiltration process, does not need complex equipment or a regeneration process, avoids the problem of secondary pollution caused by an adsorption material, and is remarkably improved in environmental friendliness. Meanwhile, the composite material also has good anti-anion interference capability and low flux attenuation. The method is wide in material source, low in cost, easy and convenient to operate, free of regeneration, low in operation cost and free of secondary waste, has good engineering popularization potential and is particularly suitable for on-site rapid treatment and large-scale application of perchlorate wastewater.
Owner:GREATER BAY AREA INST FOR INNOVATION HUNAN UNIV

Medicament for treating wastewater containing perchlorate

The invention provides a medicament for treating wastewater containing perchlorate, which consists of two parts, namely a targeted remover and a guide activator, the core components of the targeted remover comprise dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride and the like. The guiding activating agent comprises one or more of polyferric sulfate, polyferric chloride, polyaluminum ferric chloride and polyaluminum ferric silicate. The treatment agent is simple in component, a large number of perchlorate-loving ion groups contained in the treatment agent can be fully combined with perchlorate in wastewater, the perchlorate is separated out from water in a precipitation mode and then is separated and removed, and the one-step removal rate reaches 95% or above.
Owner:HUNAN ARSENIC ENVIRONMENTAL TECHNOLOGY CO LTD

Treatment equipment and method for stable treatment of perchlorate wastewater

The invention belongs to the technical field of wastewater treatment, and particularly discloses treatment equipment for stable treatment of perchlorate wastewater, the treatment equipment comprises a box body, a flow induction type driving mechanism, a self-adaptive backwashing mechanism and a compensation type water inlet mechanism, and the compensation type water inlet mechanism is arranged in the box body. The liquid level height can be sensed through the floating plate, so that the actual size of the buffer water inlet valve is adjusted; and the water inlet speed of the precise filtering area is kept within a certain range in a negative feedback regulation mode. Moreover, in order to ensure that the water pressure in the front filtering area can drive the self-adaptive backwashing mechanism, the invention also creatively provides a flow induction type driving mechanism, and the self-adaptive backwashing mechanism is driven through a structure similar to a hydraulic motor; in addition, through guiding of the liquid guiding shell, liquid used for back flushing in the piston box can be automatically supplemented.
Owner:HUNAN VAUBAN ENVIRONMENTAL PROTECTION TECH CO LTD

Recovery processing method and recovery processing system for hazardous wastes of fireworks and crackers

The invention discloses a firework and cracker hazardous waste recovery treatment method and system, and the method comprises the following steps: a wastewater treatment step: the wastewater treatment step comprises a chemical precipitation step, an A2O biochemical treatment step, a Fenton oxidation step and a BAF biological filter step, and perchlorate, COD and heavy metal are removed; the waste residue treatment step comprises a wet grinding step, a high-temperature digestion step, a flotation step, a hydraulic cyclone separation step, a wet leaching step and a fractional precipitation step, and carbon powder, titanium, barium, aluminum and magnesium resources are recycled; according to a synergistic coupling mechanism, bottom slag generated in the wastewater treatment step is conveyed to the waste slag treatment step for treatment, and filtrate generated in the waste slag treatment step is conveyed to the wastewater treatment step for treatment. The method is used for carrying out harmless treatment and resource recycling on the hazardous wastes of the fireworks and crackers.
Owner:CENT SOUTH UNIV

1, 3, 4-oxadiazino tetrahydroisoquinoline compound as well as preparation method and application thereof

The invention provides a 1, 3, 4-oxadiazino tetrahydroisoquinoline compound as well as a preparation method and application thereof, and belongs to the technical field of heterocyclic compounds for medicines. The method comprises the following steps: by taking an azomethine imine substrate and a styrene oxide substrate as raw materials and cobalt perchlorate hexahydrate as a catalyst, adding the raw materials and the catalyst into a reaction solvent, reacting overnight at normal temperature, and performing column separation to obtain the 1, 3, 4-oxadiazino tetrahydroisoquinoline compound. According to the application, the reaction condition is mild, the selectivity is high, excellent cytotoxicity is shown on HeLa cervical cancer cells and A549 lung cancer cells, the half death inhibition ratio (IC50) value on tumor cells reaches the nanomole level, and the application has a good anti-cancer drug application prospect.
Owner:SHAOXING UNIVERSITY

Nitrogen-rich energetic ionic salt compound based on bis-(5-aminotetrazole) boron

The invention discloses a nitrogen-rich energetic ionic salt compound based on bis-(5-aminotetrazole) boron. The nitrogen-rich energetic ionic salt compound comprises bis-(5-aminotetrazole) boric acid guanidine salt (I), bis-(5-aminotetrazole) boric acid aminoguanidine salt (II) and bis-(5-aminotetrazole) borane perchlorate (III), the structural formulas of the compounds are shown as (I)-(III). The compound can be used for mixed explosives and fuel-rich propellants.
Owner:XIAN MODERN CHEM RES INST

Perchlorate selective electrode based on electron / ion dual-channel material and preparation method of perchlorate selective electrode

The invention discloses a perchlorate selective electrode based on an electron / ion dual-channel material and a preparation method of the perchlorate selective electrode. The electron / ion dual-channel material is synthesized by polymerizing part of polypyrrole on the surface of Mxene and introducing long-chain alkyl substituted quaternary ammonium salt, and the material combines the dual-channel characteristics of ion enrichment and conductivity, and can significantly improve the perchlorate detection capability. Experimental results show that a perchlorate selective electrode made of the dual-channel material shows extremely high selectivity and ultra-low detection limit recognition on perchlorate, the lowest detection limit can reach 12.4 mu g / L, meanwhile, the response time is extremely short (-4s), and therefore sensitive and rapid detection on the perchlorate under the complex water body condition can be achieved. The perchlorate selective electrode provided by the invention has the characteristics of wide detection linear range, low detection limit, strong anti-interference capability, simplicity in operation, high efficiency, rapidness, low cost and the like when being used for detecting perchlorate. Therefore, the method has a wide application prospect.
Owner:HUNAN UNIV +1

Electrolyte additive for improving reaction performance of electrolyzed water, electrolyte, electrolyte solution and method for improving reaction performance of electrolyzed water

The invention belongs to the technical field of electrolyzed water, and particularly relates to an electrolyte additive for improving the reaction performance of electrolyzed water, an electrolyte, an electrolyte solution and a method for improving the reaction performance of electrolyzed water. The additive comprises nonmetal oxosalts (sulfate, phosphate, borate, selenate, silicate, carbonate, perchlorate, trifluoroacetate and the like) and an aqueous solution of the nonmetal oxosalts, and is used as an electrolyte additive for water electrolysis reaction with KOH or NaOH as an electrolyte. The invention provides application of oxysalt to improvement of oxygen evolution activity and stability of electrolyzed water. In particular, the device is also suitable for electrolytic reactions carried out at high and low temperatures. Due to the addition of the oxysalt, the oxygen evolution reaction potential is reduced, the charge transfer resistance is reduced, the electron transmission rate is increased, and relatively high chemical reaction kinetics is achieved, so that the reaction activity is favorably improved.
Owner:SHENZHEN HINGEAR ENERGY CO LTD

Hydroxyl-free lead dioxide-based nitric oxide absorbent and preparation method thereof

The invention belongs to the technical field of adsorption materials, and particularly relates to a hydroxyl-free lead dioxide-based nitric oxide absorbent and a preparation method thereof. The method comprises the following steps: preparing a mixed solution of perchloric acid and lead perchlorate, standing to form a saturated solution, and performing electrodeposition by using the saturated solution as an electrolyte to obtain a lead dioxide deposition layer; and cleaning, drying and crushing the sediments, drying the sediments in an air dry oven with an air exchange function, and calcining the sediments at high temperature to form a target product. The obtained absorbent has the characteristics of hydroxyl-free structure, nanoscale particle size, high porosity, excellent adsorption performance and the like. Test results show that the absorbent has good selective adsorption capacity on NO2, and the adsorption efficiency can reach 85% or above. The material is suitable for nitrogen oxide interference absorption in the determination process of the hydrocarbon content in coal, and has important application value.
Owner:LONGYUAN (BEIJING) CARBON ASSET MANAGEMENT TECH CO LTD

Perchlorate-doped modified anti-perovskite material as well as preparation method and application thereof

The invention discloses an anti-perovskite material. In particular to a perchlorate-doped modified anti-perovskite material as well as a preparation method and application thereof. The anti-perovskite material has efficient quantum luminescence efficiency, has a wide application prospect in the photoelectric field, is high in conductivity, and has a wide application prospect in a solid electrolyte material of a solid-state lithium battery.
Owner:JINGGANGSHAN UNIVERSITY

Method for treating perchlorate-containing wastewater

The invention belongs to the technical field of wastewater treatment, and provides a method for treating wastewater containing perchlorate, which comprises the following steps of: adding mixed quaternary ammonium salt into the wastewater, reacting the mixed quaternary ammonium salt with the perchlorate in the industrial wastewater to generate perchlorate quaternary ammonium salt precipitate, and filtering to remove the perchlorate quaternary ammonium salt in the wastewater to realize the enrichment of the perchlorate, the perchlorate in the industrial wastewater can be reduced to 0.02 mg / L or below. According to the process provided by the invention, the perchlorate in the wastewater is directly recycled in the form of the perchlorate quaternary ammonium salt precipitate, and the recycled perchlorate quaternary ammonium salt precipitate can be used as an oxidant for producing fireworks, so that the perchlorate quaternary ammonium salt is reused, and high-added-value recycling is realized.
Owner:HUNAN LINGTON ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

Purification treatment device for perchlorate wastewater

The utility model discloses a perchlorate wastewater purification treatment device, which comprises a reduction tank for carrying out biochemical reduction treatment on bacteria, an oxidation tank for carrying out biochemical oxidation treatment on bacteria, a sedimentation tank and a clean water tank, and the reduction tank, the oxidation tank, the sedimentation tank and the clean water tank are sequentially communicated. The device comprises a reduction tank for carrying out biochemical reduction treatment on bacteria, an oxidation tank for carrying out biochemical oxidation treatment on the bacteria, a sedimentation tank and a clean water tank which are communicated in sequence, low-cost and high-efficiency treatment of perchlorate can be realized through a combination mode of'bacterial biochemical reduction-bacterial biochemical oxidation-precipitation ', and the process is simple.
Owner:CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD

Integrated perchlorate treatment equipment

The utility model discloses integrated perchlorate treatment equipment which comprises a water storage tank connected with a sewage discharge pipe, a lifting pump is arranged in the water storage tank, and an integral box shell is arranged at the output end of the lifting pump. The middle water tank, the quartz sand filter, the activated carbon filter, the ion exchanger, the pipeline mixer, the precision filter and the two-stage reverse osmosis structure are arranged in the integral box shell and are connected with the output end of the air flotation machine; the bottom end of the air flotation machine is connected with a sludge box through a guide pipe; a plate filter press is arranged at the output end of the sludge box; a plurality of medicament storage tanks are further arranged and are respectively connected with the reservoir, the air flotation machine, the ion exchanger and the pipeline mixer through output pipes. The device disclosed by the utility model is reasonable in structural arrangement, can avoid external interference, is beneficial to improving the overall safety performance, prolongs the service life of the overall structure, does not cause material waste, improves the sewage treatment efficiency, has few byproducts and reduces the treatment cost.
Owner:李静筠

A method and application for removing perchlorate pollution in water using agricultural waste

The present invention discloses a method and application for removing perchlorate contamination from water bodies using agricultural waste. This method uses activated sludge and agricultural waste, or activated sludge, vegetable oil, and agricultural waste, to treat perchlorate-contaminated water bodies, using at least one of static and dynamic treatment methods. This method has the following advantages: waste recycling, turning waste into valuable resources; low cost and simple process; bioremediation without secondary pollution; and simultaneous achievement of multiple benefits, achieving multiple goals at once. Therefore, this method has broad application prospects in the treatment of perchlorate-contaminated water bodies.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY

Device and process for recycling perchlorate from fireworks and firecracker waste

The present invention discloses a device and process for recycling perchlorate in fireworks and firecracker waste, comprising the steps of primary water washing, primary solid-liquid separation, concentration, secondary water washing, secondary solid-liquid separation and crystallization. The device can achieve the separation, recycling and resource utilization of perchlorate, aluminum powder and other substances in the solid waste, while simultaneously performing harmless treatment on the waste residue to reduce pollution to the environment. In the crystallization step, the low-temperature evaporation space is divided into a plurality of units, and the position of the units is changed to effectively avoid the negative effects of excessively high evaporation temperature and sudden temperature increase of the perchlorate.
Owner:HUNAN HUAKE ENVIRONMENT DETECTION TECH SERVICES CO LTD

Carbodiimide additives for improving performance of PVC compounds

A heat stabilizer additive for reducing thermal degradation and / or surface resistivity of plasticized PVC compounds comprising: 1.0-25.0 wt % of a carbodiimide; and 75.0-99.0 wt % of a heat stabilizer comprising: (1) zinc-containing component selected from neutral or overbased zinc salts of C1-C24 linear, branched, cyclic aliphatic or aromatic organic acids, zinc diketonates, zinc alcoholates, zinc oxide, zinc hydroxide, zinc phosphite, zinc perchlorate, zinc carbonate and mixtures thereof, or metal-free nitrogen-containing compounds selected from thiourea, triethanolamine, 6-amino-1,3-dimethyl-uracil, 6-amino-1,3-di-n-propyl-uracil, 6-amino-1,3-di-n-butyl-uracil, 6-amino-1,3-diethyl-thiouracil, 6-amino-1,3-di-n-butyl-thiouracil or mixtures thereof, and optionally (2) co-stabilizers selected from hydrotalcites, zeolites, nitrogen-containing compounds, organic phosphite esters, diketones, and mixed metal compounds; and polymer compounds comprising: 30.0-89.0 wt % of a PVC homopolymer or PVC copolymer; 10.0-69.0 wt % of a primary plasticizer comprising an epoxidized natural oil or it's blends with epoxidized fatty acid monoesters; 0.01-5.0 wt % of the carbodiimide; and 0.3-5.0 wt % of the heat stabilizer.
Owner:GALATA CHEM LLC

Automatic ammonium perchlorate packaging line

The invention belongs to the technical field of ammonium perchlorate packaging, and relates to an automatic ammonium perchlorate packaging line. The device comprises a conveying mechanism and a filling mechanism. The filling mechanism comprises a storage barrel, an elastic rubber ring and a coil spring; the storage barrel is arranged above the conveying mechanism in an up-down moving mode, and the elastic rubber ring is connected with the lower end of the storage barrel. The end of the inner side of the coil spring is fixedly connected with a winding wheel. And a connecting shaft is rotationally mounted in the filling mechanism. A limiting assembly is arranged between the connecting shaft and the winding wheel. The coil spring is tightened and sequentially wound on the winding wheel to block the filling opening, the filling opening is the smallest at the moment, the limiting assembly releases limiting on the winding wheel, the coil spring is gradually loosened under the elasticity of the coil spring till the elastic rubber ring abuts against the inner wall of the bottle opening of the packaging bottle, the filling opening can be automatically matched with the bottle opening of the packaging bottle, and the filling safety is guaranteed. The filling efficiency can be improved, and the automation level of ammonium perchlorate packaging can be improved.
Owner:DALIAN GAOJIA CHEM

Preparation method of tofacitinib key intermediate

The invention belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of a tofacitinib key intermediate. According to the present invention, the diphenyl glycolic acid tropine ester is adopted as the starting material, and the diphenyl glycolic acid tropine ester is obtained under the action of the photosensitizer and the perchlorate in cooperation with the irradiation of the high-pressure mercury lamp, such that the technology has characteristics of simple preparation, no use of the expensive catalyst, safety, environmental protection, and avoiding of the risk of the standard exceeding of the heavy metal content, and is suitable for the large-scale production.
Owner:SHANDONG NEW TIME PHARMA CO LTD

Production of sanitizing fluid using in situ electrolysis

A system, comprising: a chlorine source in form of an electrolysis unit to generate an insitu generated active chlorine; wherein a concentration of perchlorate is not more than half of a concentration of chlorate; and pH of a fluid containing in-situ generated active chlorine is more than 7.4; a buffer tank to store a concentrate of in-situ generated active chlorine as a free available chlorine (FAC); a fluid distribution system to supply FAC in form of an in-use fluid to the cabinet; wherein the system is configured to clean and disinfect an article with the fluid while complying with national and international standards for food safety, operator's safety and regulatory requirements regarding the use of biocides.
Owner:APPLIED PHAGE GMBH

Preparation method and application of deep eutectic electrolyte based on DL-alanine

The invention provides a preparation method and application of a hydrated deep eutectic electrolyte based on DL-alanine. The hydrated deep eutectic electrolyte is composed of DL-alanine, zinc perchlorate hexahydrate and H2O. The introduction of DL-alanine breaks through a hydrogen bond network among water molecules in a traditional electrolyte, greatly inhibits the activity of free water and reduces the freezing point; meanwhile, DL-alanine enters a primary solvation shell of Zn < 2 + >, so that the activity of free water is reduced, particularly, a series of interface side reactions caused by H2O at high temperature are remarkably reduced, and the characteristic of availability in a wide temperature range is realized. The hydrated deep eutectic electrolyte prepared by the invention is simple to prepare, low in cost, green and environment-friendly, and suitable for large-scale industrial production. Compared with the traditional electrolyte, the hydrated deep eutectic electrolyte disclosed by the invention can realize dendrite-free long-term stable circulation of a zinc negative electrode, and an assembled zinc ion capacitor can stably operate in a wide temperature interval of-40 to 60 DEG C and can be circulated for more than 60000 times.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Ni-based energetic metal organic super-hydrophobic composite membrane and preparation method thereof

The invention belongs to the technical field of super-hydrophobic materials, and provides a Ni-based energetic metal organic super-hydrophobic composite membrane and a preparation method thereof, and the composite membrane is a super-hydrophobic energetic composite membrane Ni-4N-SA-W-Br with double functions of super-hydrophobic protection and damage energy release. The preparation method comprises the following steps: dissolving 4-amino-1, 2, 4-triazole in ethanol, adding nickel perchlorate hexahydrate to obtain a suspension, carrying out centrifugal separation to obtain blue powder, carrying out hydrophobic modification by using stearic acid, adding water and then adding water-based resin to obtain a composite coating, and spraying to obtain the super-hydrophobic composite membrane. The structure of the Ni-based energetic metal organic complex is characterized, the performance of the super-hydrophobic composite membrane is tested, and the performance of the super-hydrophobic composite membrane is tested through an initial contact angle test, a friction contrast experiment and an energy release characteristic contrast experiment. The result shows that the Ni-4N-SA-W-Br is an energy-containing metal organic super-hydrophobic composite film with the damage energy release dual functions, which has excellent super-hydrophobic characteristic, durable characteristic and energy release characteristic.
Owner:ZHONGBEI UNIV

Modified activated carbon for removing perchlorate in water for sheep farming and method for preparing the same

ActiveCN119633761BImprove adsorption capacityStrong electrostatic attractionSheep farmingCarboxyl radical
The application provides a modified activated carbon for removing perchlorate in water for sheep farms and a preparation method thereof, relates to the field of water treatment, and the method carries out reaction on activated carbon in a citric acid aqueous solution, uniformly loads a carboxyl layer on the surface of the activated carbon, and obtains preliminarily modified activated carbon; carries out reaction on the preliminarily modified activated carbon in an alkaline polydimethyl diallyl ammonium chloride aqueous solution, and strong cation quaternary ammonium salt is adsorbed on the surface of the carboxyl layer through electrostatic action, thereby obtaining secondarily modified activated carbon; and carries out reaction on the secondarily modified activated carbon in a triethylenetetramine aqueous solution, so that triethylenetetramine molecules are further combined to the strong cation quaternary ammonium salt through electrostatic adsorption, thereby obtaining the modified activated carbon for removing perchlorate in water for sheep farms, the adsorption capacity of the activated carbon for solutes with negative charges is significantly enhanced, and the treatment efficiency of the overall farm environment on perchlorate is improved.
Owner:SHAANXI UNIV OF SCI & TECH

A hydrophobized thiol-modified silver nanostar paper-based material and its preparation method and application

The invention discloses a hydrophobized thiol-modified silver nanostar paper-based material, a preparation method, and an application thereof, and belongs to the field of perchlorate detection. The method comprises the following steps: first, using NaCl to displace citrate modified on the surface of a silver nanostar sol, and then removing excess chloride ions to obtain the displaced silver nanostar sol; then, using 4-aminothiophenol to perform thiol modification on the displaced silver nanostar sol to obtain the thiol-modified silver nanostar sol; and finally, loading the thiol-modified silver nanostar sol on filter paper by vacuum filtration to obtain a paper-based substrate. The paper-based substrate is then hydrophobized using polydimethylsiloxane to obtain the hydrophobized thiol-modified silver nanostar paper-based material. The method is simple and reliable, and can achieve trace and rapid detection of perchlorate in water by synthesizing an AgNS structure with high plasmon activity, and then performing thiol modification, loading the paper-based substrate, and hydrophobizing the paper-based substrate.
Owner:SHAANXI UNIV OF SCI & TECH

Qualitative and quantitative method for liensinine perchlorate

PendingCN121954894Agenerate accuratelyAccurate identification and generationColor/spectral properties measurementsReference sampleChlorate ion
The invention relates to a qualitative and quantitative method for liensinine perchlorate. The qualitative method comprises the following steps: weighing 1mg of liensinine perchlorate and 1mg of liensinine, uniformly grinding and tabletting the liensinine perchlorate and the liensinine with 100mg of potassium bromide respectively, acquiring an infrared spectrum of 4000-400cm <-1 > by adopting an infrared spectrometer, and comparing spectrograms to find that the peak shapes of the liensinine perchlorate and the liensinine are similar, the peak shapes of the liensinine perchlorate and the liensinine perchlorate are common characteristic peaks and the peak shapes of the liensinine perchlorate are unique characteristic peaks of the liensinine perchlorate and the liensinine are common characteristic peaks and the peak shapes of the The quantitative method comprises the following steps: weighing a series of liensinine perchlorate reference substances with different masses, uniformly grinding and tabletting the liensinine perchlorate reference substances and 100mg of potassium bromide respectively, collecting an infrared spectrum, carrying out integration on a 625cm <-1 > characteristic peak to obtain a peak area, and drawing a standard curve by taking the peak area as a vertical coordinate and taking the sampling mass of the reference substances as a horizontal coordinate; the method comprises the following steps: weighing a sample to be detected, collecting an infrared spectrum, integrating a 625cm <-1 > characteristic peak to obtain a peak area, substituting the peak area into the standard curve equation, calculating the mass of the liensinine perchlorate in the sample, and substituting the mass into the content calculation formula to obtain the content of the liensinine perchlorate in the sample. The method is good in precision, repeatability and stability, wide in linear range, high in linear correlation coefficient and high in recovery rate, the problem that liensinine interference cannot be avoided in an existing content determination method is effectively solved, whether liensinine perchlorate is generated or not can be qualitatively judged, and the quantity of liensinine perchlorate generated can be quantitatively detected; and a feasible new method is provided for production process optimization and quality evaluation of liensinine perchlorate.
Owner:FUJIAN UNIV OF TRADITIONAL CHINESE MEDICINE +3

Reactor for degrading perchlorate wastewater

The utility model discloses a reactor for degrading perchlorate wastewater, which comprises a resin adsorption unit, a biological culture unit and a washing liquid preparation unit which are connected through pipelines to form a closed loop system. The resin adsorption unit comprises an adsorption tank which is used for loading ion exchange resin and serves as a main body part for wastewater treatment; the biological culture unit comprises a biological culture tank which is internally provided with a microbial community and filler and is used for domesticating and culturing microorganisms; the alkali liquor preparation unit comprises an alkali liquor preparation tank and a stirrer and is used for preparing alkali liquor; the resin adopted by the utility model can be efficiently regenerated for multiple rounds, so that the treatment cost is reduced. The reaction condition requirement is mild, and the used device and equipment are simple and easy to implement. The reaction is rapid, and perchlorate in the wastewater can be efficiently degraded under the condition that new pollution is not introduced. A biological regeneration mode is adopted, so that the problem of secondary pollution caused by traditional chemical regeneration is avoided, meanwhile, the resource utilization efficiency is improved, and the operation cost of using a large number of chemical agents is reduced.
Owner:DALIAN UNIV OF TECH ENVIRONMENT ENG RES & DESIGN INSTIT UTE