134 results about "Gliphosate" patented technology

The invention relates to the technical field of water pollution treatment equipment, and discloses glyphosate production sewage treatment equipment based on biological treatment.The glyphosate production sewage treatment equipment based on biological treatment.The glyphosate production sewage treatment equipment based on biological treatment.The glyphosate production sewage treatment equipment based on biological treatmentcomprises a treatment tank, a water distributor fixedly arranged at the top of an inner cavity of the treatment tank and a supporting ring rotationally arranged in the middle of the inner cavity of the treatment tank; a water outlet is formed in one side of the bottom of the treatment tank in a communicating manner, a biological membrane is mounted on the inner side of the supporting ring, and iron particles are mounted in the biological membrane in an embedded manner; the response characteristic that iron particles are embedded in an elastic biological membrane is utilized, local deformation of the biological membrane is induced through attraction of an electromagnet, membrane holes generate a stretching effect, blocking substances such as colloidal substances and flocculates attached to the membrane holes are effectively loosened and stripped, and the blocking substances are effectively removed by combining rotation of the biological membrane and dynamic cleaning of the water spraying assembly. The double blockage removal mechanism of physical deformation and hydraulic scouring is achieved, and compared with a traditional static cleaning mode, the blockage removal efficiency is higher.

The invention relates to the technical field of organic synthesis, in particular to 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine as well as a synthesis method and application of the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine. The synthesis method comprises the following steps: (1) synthesizing 2-chloro-3-fluoro-4-iodine-5-methylpyridine from 2-chloro-3-fluoro-5-methylpyridine and an iodine elementary substance to obtain 2-chloro-3-fluoro-4-iodine-5-methylpyridine; (2) synthesizing 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine, the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride, the tripotassium phosphate and the (2-formyl phenyl) boric acid, and further synthesizing the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine and the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride. And (3) synthesizing the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine by using the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde and sodium tert-butoxide. The 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine compound constructed by the invention can be used for detecting the content of pesticide residue glyphosate.

The invention discloses a dual-mode optical fiber sensor and a glyphosate content determination and photo-thermal controlled release green conversion system and method. The integrated double-optical-fiber sensor capable of realizing specific detection and efficient degradation of glyphosate pollution comprises a first sensor for realizing glyphosate detection through local plasma resonance and a second sensor for realizing glyphosate degradation through a photothermal effect of a nano material layer. The glyphosate inhibits an enzymatic reaction of tyrosinase on the first sensor, causing an output spectral peak change. The detected solution releases glyphosate oxidoreductase through photo-thermal excitation of the second sensor, glyphosate is degraded into aminomethylphosphonic acid and glyoxylic acid, a degradation solution is generated and recycled for the first sensor, and multiple times of cyclic detection and degradation are achieved. The method has the advantages of simplicity and convenience in operation, small size, high detection sensitivity, low detection limit and the like, the glyphosate pollution detection and treatment efficiency is remarkably improved, and the method has good environmental protection property and economical efficiency.

The invention discloses a ZnTi-LDH modified UiO-66 nano composite material modified electrode rich in defects, a preparation method of the electrode and application of the electrode to detection of glyphosate pesticides. The preparation method comprises the following steps: firstly, treating UiO-66 by adopting a surface controlled decarboxylation defect technology to obtain defect-rich UiO-66, then preparing ZnTi-LDH on the surface of the UiO-66 in situ by adopting a hydrothermal method to obtain the ZnTi-LDH-coated D-UiO-66 heterostructure, and the structure can provide a large specific surface area and rich active sites, simultaneously contains Zr and Ti two metal types capable of complexing with organic phosphine molecules, and can be used for preparing a high-specific-surface-area catalyst. The adsorption and capture of the catalyst on an analyte are greatly improved, and the sensing analysis performance of a corresponding sensor on an organic phosphine pesticide is improved. An electrochemical sensing platform constructed on the basis of the ZnTi-LDH-coated D-UiO-66 nanocomposite modified electrode obtains a wide detection range (0.05-50 [mu] mol L1), a low detection limit of 0.19 [mu] mol / L (S / N = 3) and high sensitivity (1.220 [mu] A.[ mu] mol / L) when glyphosate is detected, and has good selectivity, reproducibility and stability.

The application discloses a continuous system and method for converting low-value glyphosate by-products into high-value chemical products, comprising: pumping low-value glyphosate by-products and alkaline compounds into a constant-temperature conversion kettle for conversion and decomposition, and introducing nitrogen into the top of the constant-temperature conversion kettle to blow off and replace gaseous volatile products generated in the reaction; after gaseous products pass through a buffer tank to capture water vapor, the gaseous products enter a three-stage condenser to recover condensable components into a crude product receiving tank, and the non-condensable components are purified and impurities are removed by an acid absorption system and then utilized; liquid crude product is pumped into a low-temperature vacuum desolventizing kettle to realize separation of condensable components from liquid water, and then enters a two-stage condenser for deep dehydration and separation, and is recovered into a pure product receiving tank. The application realizes a new process for preparing high-purity N,N-diethylmethylamine, and forms a whole-process process system for converting low-value waste materials such as chloromethane, triethylamine and synthetic products thereof into high-value chemical products such as N,N-diethylmethylamine and ethylene.

The utility model discloses a glyphosate crystalline liquid filtering device, which comprises a rack, a driving roller, a driven roller, a vacuum belt, a driving mechanism, filter cloth, a cleaning device and a plurality of guide rollers, the driving roller and the driven roller are respectively and rotatably connected onto the rack, the vacuum belt is connected onto the driving roller and the driven roller, and the vacuum belt is connected onto the driving roller and the driven roller. The guide rollers are rotationally connected to the rack, the filter cloth is of an annular structure and is sequentially connected to the multiple guide rollers, the filter cloth surrounds the outer side of the vacuum belt, and a part of the filter cloth is attached to the upper surface of the vacuum belt to form an attached part; the driving mechanism is connected with the driving roller and is used for driving the driving roller to rotate so as to drive the vacuum belt to move, so that the vacuum belt drives the filter cloth to move; and the cleaning device comprises a cleaning roller, a cleaning tank and a spray-washing assembly. According to the utility model, the filter cloth can be cleaned and can be prevented from being blocked, so that the filtering effect of the filter cloth is prevented from becoming poor.

The application discloses a temperature-sensitive molecular imprinting sensitive film, a preparation method thereof and application thereof in a glyphosate detection sensor, and belongs to the field of optical sensing technology and environmental monitoring. The application forms an imprinting cavity which is highly complementary to a template molecule in size and spatial configuration in a polymer network, realizes specific identification of a target molecule, and solves the problems of complex sample pretreatment and long detection period of the existing glyphosate detection method. The application introduces a temperature-sensitive material PNIPAM, realizes in-situ, non-destructive and reversible release of the template molecule by temperature control, discards the traditional destructive elution mode, avoids causing serious secondary environmental pollution, avoids the problems of swelling and corrosion of the imprinting cavity caused by strong acid or organic solvent, and causes irreversible damage to the structure of the imprinting cavity, which seriously affects the reuse frequency of the sensor and the detection stability.

The utility model discloses a continuous condensation reaction device for glyphosate processing, which belongs to the related technical field of reaction devices and comprises an outer shell, a main material pipe and a plurality of groups of auxiliary material pipes, the main material pipe is fixedly mounted on the outer surface of the front end of the outer shell, and the auxiliary material pipes are fixedly mounted on the outer surface of the upper end of the outer shell. The main material pipe and the auxiliary material pipes are in through connection through a plurality of conveying pipes, the conveying pipes are in butt joint and fixed through mixers, the lower ends of the conveying pipes are provided with a plurality of outer sleeves, the outer sleeves are in S-shaped through connection, and heating rods are movably installed in the outer sleeves. One ends of the plurality of groups of heating rods are butted and fixed through a connecting plate; the inner pipe body is provided with a pull-out type auxiliary structure, so that the interior of the coil pipe is more convenient to clean, stable output is kept, an auxiliary material mixing structure is arranged, and the material mixing effect is improved under the condition that the raw material conveying speed is guaranteed.

The invention discloses a glyphosate soluble concentrate and a preparation method, and the glyphosate soluble concentrate comprises the following raw material components in parts by weight: 30-40 parts of glyphosate, 10-15 parts of isopropylamine, 8-12 parts of a composite synergist, 2-3 parts of an anti-freezing agent, 0.05-0.1 part of a pH regulator, 2-3 parts of an additive, 0.1-0.5 part of a defoaming agent, 1-2 parts of a loading agent and 40-50 parts of water. Compared with the prior art, the glyphosate soluble concentrate prepared by the invention has the advantages that the propoxylated quaternary ammonium salt and the ethyoxyl alkyl phosphate are mixed according to a certain mass ratio to form the synergist, so that the pesticide effect of glyphosate is remarkably improved. Meanwhile, the aluminum pillared clay is introduced to load the glyphosate and is cooperatively used with the polydopamine-sodium alginate compound, so that the prepared glyphosate soluble concentrate has relatively high leaf deposition rate and rain wash resistance and also has excellent ultraviolet resistance.

The present invention relates to the field of environmental protection and water pollution control, and discloses a preparation method of zirconium-cobalt bimetallic phthalocyanine and its application in degrading glyphosate in water bodies. Specifically, zirconium-cobalt bimetallic phthalocyanine catalyst is prepared by a solvothermal method using zirconium salt and cobalt phthalocyanine as raw materials and organic acid as a regulator. Its catalytic performance is regulated by optimizing the dosage of the regulator. The prepared catalyst can activate peroxymonosulfate, and the degradation rate of glyphosate in water bodies reaches 80% - 100%. The present invention discloses the preparation of a zirconium-cobalt bimetallic phthalocyanine catalyst and its application in the degradation of glyphosate in water bodies, which has broad application prospects in the field of water environmental protection.

The invention provides a cerium-based metal organic framework as well as a preparation method and application thereof, the cerium-based metal organic framework is obtained by uniformly mixing a cerium salt solution and a regulator, then carrying out a primary microwave heating reaction, then adding a ligand, carrying out a secondary microwave heating reaction, and then washing and drying, the cerium salt is ceric ammonium nitrate, and the ligand is cerium nitrate. The ligand is terephthalic acid, and the regulator is acetic acid. According to the method, the UiO-66 (Ce) with bionic Lewis acid sites is designed through microwave-assisted heating and by utilizing acetic acid to regulate the local chemical environment of the UiO-66 (Ce), so that the activity of hydrolase is greatly improved, a large number of oxygen vacancies can be induced, the activity of oxidase is improved, efficient degradation of glyphosate is realized, and the method has a wide application prospect in the aspects of glyphosate hydrolysis and detection.

This invention relates to the field of wastewater purification and treatment devices, and discloses a high-efficiency purification and treatment device for glyphosate production wastewater, including a neutralization tank and a filter tank. The filter tank is fixedly installed at the top of the neutralization tank and is connected to the neutralization tank. Multiple partitions are fixedly installed inside the neutralization tank, and the partitions have through grooves. The through grooves are staggered. A rotating shaft is rotatably installed inside the neutralization tank. A motor is fixedly installed at the bottom of the neutralization tank, and the output end of the motor is fixedly connected to the bottom end of the rotating shaft. The multiple partitions divide the inner cavity of the neutralization tank into multiple chambers. By setting multiple partitions, this invention divides the inner cavity of the neutralization tank into multiple chambers. Each chamber is equipped with stirring blades, which improves the mixing effect of wastewater and reagents. The wastewater gradually flows downward through the through grooves on the partitions. The staggered through grooves lengthen the flow path of the wastewater, thereby improving the mixing effect of wastewater and reagents.

The invention relates to the technical field of analytical chemistry, and discloses a method for determining the glyphosate content in water by high performance liquid chromatography. The method comprises the following steps: preparing a standard substance series solution and a quality control sample solution covering a predetermined concentration range; performing physical and chemical pretreatment on the target water sample to obtain a purified sample. Then, respectively injecting the purified water sample and the standard substance solution into a chromatographic system for separation, and collecting original chromatographic signals; retention time and peak area parameters of a glyphosate characteristic chromatographic peak are extracted, a quantitative calibration relation is established by using standard product data, and accordingly, the peak area of a target water sample is converted into a preliminary result of glyphosate concentration. And finally, introducing a quality control sample to carry out quality control verification, carrying out validity judgment on the preliminary result according to the generated quality control index, and outputting a final glyphosate content measured value. According to the method, the accuracy and reliability of a measurement result are ensured, and the interference risk caused by a complex water sample matrix is reduced.

To provide a fully-continuous synthesis method of glyphosate.SOLUTION: In the present invention, high-purity glyphosate is prepared by using a fully-continuous system in which a feed pump, a plurality of micromixers, a plurality of microchannel reactors, a dynamic rotary reactor, a buffer tank, a back pressure valve, a continuous reaction-kettle-type reactor, and a continuous crystallizer are sequentially connected, in which glycine is used as a raw material.EFFECT: According to the present invention, stable fully-continuous industrial production is achieved, no external intervention is required during the process, the efficiency of time and space is high, the number of operators and the labor intensity are greatly reduced, the production cost is greatly reduced, complicated operations in the conventional reaction-vessel process, a rapid rise of temperature in the kettle and the risk of material ejection are avoided, production safety is improved, the quality of glyphosate products is ensured, the operation of the apparatus is stable, the reaction time is short, the reaction yield is high, and the quality of the product is stable.SELECTED DRAWING: Figure 1

A layer structure having a solid substrate having a surface, the surface carrying a layer including a molecularly imprinted polymer, wherein the molecularly imprinted polymer is adapted to bind a glyphosate analyte, wherein the glyphosate analyte is selected from glyphosate, a glyphosate degradation product, a metabolite of glyphosate or a metabolite of the degradation product of glyphosate, wherein a fluorescence characteristic of the molecularly imprinted polymer changes upon binding of the glyphosate analyte. Further, a method for detecting a glyphosate analyte in a sample includes: providing the layer structure having the molecularly imprinted polymer; providing a fluidic contact of the layer structure with the sample or an organic extract of the sample; measuring a fluorescence property of the layer structure; and estimating a concentration of glyphosate or of the glyphosate related analyte at least semi-quantitatively.

The invention belongs to the technical field of pesticide wastewater treatment and resource recovery, and discloses a method for recovering salts from glyphosate production wastewater, which comprises the following steps: collecting factory glyphosate wastewater, and supplementing calcium ions into the wastewater; adding hydrogen peroxide, and carrying out ultraviolet irradiation to generate hydroxyl radicals; continuously stirring in the whole reaction process, so that the glyphosate and the derivatives thereof are subjected to molecular transformation and self-assembly under the induction of hydroxyl radicals to generate precipitates; after the reaction is finished, carrying out suction filtration, washing and drying to recover precipitates, so as to obtain an organic-inorganic hybrid salt product; the treated supernate can be recycled for a next batch of reaction for multiple times, so that continuous treatment is realized. The method is easy and convenient to operate, mild in condition, free of additional pH adjustment and low in agent dosage; the total recovery rate can be remarkably increased through circular treatment, the method has good resource recovery potential on glyphosate wastewater, and a new idea can be provided for reduction and recovery of high-salt and high-concentration organic wastewater.

A process for preparing ammonium sulfate from recovered ammonia in glyphosate is characterized in that a device consists of a deamination tower reboiler, a fraction water tank, a tail gas cooler, a deamination tower overhead condenser, a deamination tower feeding buffer tank, a deamination tower and a tail gas absorption tower which are communicated through pipelines according to specific logic to form a closed-loop system; the process flow comprises the following steps: a gas phase at the top of a mother liquor tower supplies heat to a reboiler, then condenses and enters a fraction water tank, the gas phase is cooled by a tail gas cooler and condensed by a condenser at the top of a deamination tower, a liquid phase enters a buffer tank and circulates to the deamination tower, the gas phase is introduced into a tail gas absorption tower, sulfuric acid is used as an absorption liquid to generate ammonium sulfate for reuse, and materials at the bottom of the deamination tower are recycled. The process realizes efficient recovery of ammonia resources and preparation of ammonium sulfate, synchronously recovers other useful components, reduces energy consumption through gradient utilization of energy, has both environmental protection and economic benefits, and is suitable for a resource recycling scene in glyphosate production.

The application provides a method for Agrobacterium-mediated genetic transformation of oil palm, and the method uses embryogenic callus of oil palm as explants, adopts Agrobacterium-mediated mode, and selects the most suitable Agrobacterium liquid concentration, immersion time, co-culture time, acetosyringone concentration and antibiotic concentration in the transformation process. An expression cassette containing an EPSPS mutant gene is used as a screening marker, and glyphosate is used as a screening agent to select glyphosate-resistant callus. The screening efficiency of the application is higher than that of the traditional hpt / hygromycin screening system. Meanwhile, the effectiveness of the EPSPS / glyphosate screening system in the genetic transformation of oil palm is proved, which marks the first application of the system in the genetic transformation of oil palm and provides a valuable tool for promoting the research of the important economic crop.

The present invention "Application of up20 sequence in enhancing gene expression and method thereof" belongs to the field of molecular biology technology. On one hand, the present invention provides the application of up20 sequence as shown in SEQ ID NO.1 in enhancing gene expression, and based on the new application of up20 sequence, provides a method for enhancing gene expression and a method for enhancing glyphosate resistance. The present invention has experimentally confirmed that up20 sequence can at least double the expression and enzyme activity of GUS gene in Arabidopsis or tobacco, and up20 sequence can significantly enhance the expression of glyphosate resistance gene. aroA20 Gene expression to improve transformation aroA20 Glyphosate resistance in recombinant Escherichia coli strains expressing the gene.

The invention discloses an enzyme for metabolizing glyphosate as well as a gene promoter and application thereof. According to the invention, the glyphosate tolerant germplasm Kitaake is screened for the first time. Moreover, the glycosyl transferase gene GRGT1 (Os04g0206500) which plays a key role in improving the glyphosate tolerance is identified in Kitaake for the first time, and the gene expression level under the stress of glyphosate is remarkably improved due to deletion of a single base A at a site 803 in a promoter region of the glycosyl transferase gene GRGT1 (Os04g0206500). The GRGT1 protease can catalyze a glycosylation reaction between glyphosate and two glycosyl donors UDP-glucose and UDP-glucuronic acid to generate low-toxicity derivatives M331 and M345, so that the residue of glyphosate in rice is reduced. The invention systematically discloses a glyphosate-resistant glycosylation metabolism mechanism of rice, discovers a new glyphosate metabolism gene, and provides a basis for creating efficient resistant germplasm resources.

The utility model discloses continuous drying equipment for glyphosate. The continuous drying equipment comprises a drying tower, a feeding device, a crushing device, an air heating device, a cyclone separator, a bag-type dust collector, an induced draft fan and a spraying dust collector, wherein the feeding device is connected with the drying tower and is used for conveying glyphosate wet powder into the drying tower, the crushing device is connected to the bottom of the drying tower, an air outlet of the air heating device is connected with the crushing device, an outlet of the drying tower is directly or indirectly connected with an inlet of the cyclone separator, and an outlet of the cyclone separator is connected with an outlet of the drying tower. An air outlet of the cyclone separator is connected with an inlet of the bag-type dust collector, an air outlet of the bag-type dust collector is connected with an inlet of the induced draft fan, and an outlet of the induced draft fan is connected with an inlet of the spraying dust collector. According to the utility model, the discharged hot air can be dedusted, and glyphosate powder can be prevented from being carried in the discharged hot air, so that the environmental pollution can be avoided, and the influence on the health of people can be avoided.

The present invention discloses a dual-recognition fluorescent molecular probe and its preparation method and application in the detection of lead ions and / or glyphosate, relating to the technical field of the detection of lead ions and the pesticide glyphosate. The dual-recognition fluorescent molecular probe of the present invention is a Schiff base type probe with dicyanoisophorone and benzoylhydrazine as fluorescent groups. The present invention also relates to the application of the dual-recognition fluorescent molecular probe in the sensing detection of lead ions. The complex of the dual-recognition fluorescent molecular probe and lead ions can be used for the sensing detection of glyphosate. The raw materials of the dual-recognition fluorescent molecular probe provided by the present invention are easily obtained and the operation is simple. The present invention realizes the quantitative detection of lead ions / or glyphosate by the different functions demonstrated by the probe through ultraviolet and fluorescence spectra, with strong reversibility, can be recycled multiple times, and has good selectivity, is not easily affected by other metal ions, has a low detection limit. In addition, it also shows excellent application imaging in animals such as cells and zebrafish.

The invention relates to the technical field of water environment ecological restoration and pollution treatment, in particular to a method for synergistically purifying glyphosate-nitrogen and phosphorus combined pollution by inoculating piriformospora indica to strengthen wetland plants. The invention aims to provide a method for synergistically purifying glyphosate-nitrogen and phosphorus combined pollution by inoculating piriformospora indica to strengthen wetland plants, an endophytic fungus-wetland plant symbiotic system is constructed, plant growth promotion and rhizosphere micro-ecological optimization are realized, the problems of low combined pollution water treatment efficiency and poor ecological stability in the prior art are solved, and the method is suitable for industrial production. Through symbiotic system construction and experimental parameter optimization, synergistic and efficient purification of glyphosate, nitrogen and phosphorus in the aquaculture tail water is realized, and the requirements of actual aquaculture tail water environment treatment are met.

The continuous reaction system of glyphosate raw material medicine is connected with acidolysis and dealcoholization reactor, and the acidolysis and dealcoholization reactor is provided with first reaction function section, second reaction function section, third reaction function section and fourth reaction function section from top to bottom, the first reaction function section is a filler section, the adjacent reaction function sections are separated by partition plates, and the partition plates cannot realize the up and down movement of materials. The upper layer of the liquid surface of the fourth reaction function section is connected with the upper end of the third reaction function section through a gas phase pipeline; the upper layer of the liquid surface of the third reaction function section is connected with the upper end of the second reaction function section through a gas phase pipeline. In each function section, each stage of gas phase flows to the upper section from the lower section by pressure difference, and a certain height of gas-liquid contact is maintained in the upper section to carry out mass transfer and heat transfer, the gas-liquid mass transfer and heat transfer are strengthened through stripping and aeration, and the stripping effect is achieved to quickly remove formaldehyde, methylal, chloromethane and other materials in the materials.

The invention relates to a glyphosate hydrolysis kettle waste heat utilization system and method, and the system comprises a high temperature heat exchanger which is connected with a glyphosate primary hydrolysis kettle and is used for cooling a hydrolysis kettle top gas phase and heating a first liquid in the high temperature heat exchanger; the flash tank is connected with the high-temperature heat exchanger and is used for evaporating liquid transmitted from the high-temperature heat exchanger; the compressor is connected with the flash tank and is used for compressing the gas transmitted from the flash tank; and the turbocharger is respectively connected with the compressor and the glyphosate primary hydrolysis kettle and is used for pressurizing the gas transmitted from the compressor to form steam, and the steam is transmitted to the glyphosate primary hydrolysis kettle to serve as a heat source. According to the invention, the gas phase condensation circulating water at the top of the hydrolysis kettle is saved, the comprehensive utilization of the waste heat of the first-stage hydrolysis kettle is realized, the utilization efficiency of energy is greatly improved, and the production and operation cost is reduced.

The invention provides an F and Pd modified single crystal BiVO4 photocatalyst and application of the F and Pd modified single crystal BiVO4 photocatalyst to photocatalytic degradation of glyphosate and synergistic production of H2O2. The preparation method comprises the following steps: dispersing single crystal BiVO4 powder in a deionized water solution to prepare a suspension; adding a fluoride solution into the suspension, stirring for a certain time under illumination, washing and drying to obtain a photocatalyst (BiVO4-F-110) of which F <-> is modified on a crystal face (110) of a single crystal BiVO4 enriched photohole; the preparation method comprises the following steps: dispersing BiVO4-F-110 into a methanol aqueous solution, adding a certain amount of a palladium chloride aqueous solution, continuously introducing Ar, removing O2 dissolved in a suspension, and then carrying out light treatment under a stirring condition; and after illumination is finished, washing and drying the obtained precipitate to obtain the photocatalyst. F ions are selectively modified on the hole-rich crystal face of the single crystal bismuth vanadate, so that glyphosate adsorption can be promoted, photogenerated holes can be effectively captured, the Pd-loaded (010) crystal face can effectively enhance the reduction of O2 to produce H2O2, and the synergistic interaction of pollutant degradation and H2O2 synthesis is further realized.

The invention discloses a method for detecting vitamin B1 and glyphosate by a nano-enzyme base, which comprises the following steps of: preparing Cu2O / Mn under ultraviolet irradiation by taking Cu2O as a template and manganese ions as donors, preparing Mn-tetra (4-carboxyphenyl) porphyrin (TCPP) nano-enzyme (Cu2O / Mn at TCPP) with weak pseudoperoxidase activity by a hydrothermal method, and enhancing the affinity between the Cu2O / Mn at TCPP and a substrate 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) by vitamin B1 (VB1), more hydroxyl radicals (. OH) are generated, the activity of pseudoperoxidase is remarkably enhanced, and colorless TMB is oxidized to generate a blue solution; due to the interaction of glyphosate and vitamin B1, the addition of glyphosate can effectively inhibit the affinity interaction of VB1 and TMB, thereby inhibiting the catalytic oxidation reaction; according to the present invention, with the increase of the VB1 concentration, the absorbance of the solution is linearly increased, and with the increase of the glyphosate concentration, the absorbance is linearly reduced, such that the new VB1 and glyphosate detection method is established, the detection limits are respectively 0.20 mg / kg and 0.01 mg / kg, and the detection method has characteristics of strong specificity and no interference of other vitamins and pesticides.

The application provides an F, Pd modified single crystal BiVO4 photocatalyst and an application of the photocatalyst in photocatalytic degradation of glyphosate and synergistic production of H2O2. Single crystal BiVO4 powder is dispersed in a deionized water solution to prepare a suspension; a fluoride solution is added to the suspension, and the mixture is stirred under light irradiation for a certain time, washed and dried to obtain F ‑ modified photocatalyst (BiVO4-F-110) on a (110) crystal plane of the single crystal BiVO4 which is rich in photo holes; the BiVO4-F-110 is dispersed into a methanol water solution, a certain amount of a palladium chloride water solution is added, Ar is continuously introduced, dissolved O2 in the suspension is removed, and then the mixture is treated under light irradiation under stirring; after the light irradiation, the obtained precipitate is washed and dried to obtain the photocatalyst. Selective modification of F ions on the hole-rich crystal plane of the single crystal bismuth vanadate can promote the adsorption of glyphosate and effectively capture photo-generated holes, and the Pd loading on the (010) crystal plane can effectively enhance the O2 reduction to produce H2O2, thereby realizing the synergistic effect of pollutant degradation and H2O2 synthesis.

This invention relates to a continuous crystallization method for glyphosate based on spherical seed crystal regulation. The continuous crystallization method includes the following steps: (1) continuously adding an acidic aqueous solution of glyphosate to a primary crystallizer and continuously adding an alkaline solution to control the pH at 1.0-1.8 to obtain a suspension containing primary crystals; (2) continuously adding the suspension obtained in step (1) to a secondary crystallizer and continuously adding an alkaline solution to control the pH at 1.9-3.0 to obtain a suspension containing spherical seed crystals; (3) continuously adding the suspension obtained in step (2) to a tertiary crystallizer, and obtaining glyphosate crystal products through crystal growth. This invention effectively reduces the intensity of secondary nucleation by segmented coupling control of nucleation, morphology regulation and crystal growth during continuous crystallization, and obtains glyphosate crystal products with narrow particle size distribution, large average particle size and good filtration performance.

An embodiment of the present invention provides a combined treatment method and device for glyphosate mother liquor and glyphosate-N-methyliminodiacetic acid (PMIDA) mother liquor. The treatment method includes performing pretreatment on both the glyphosate mother liquor and the PMIDA mother liquor; subjecting the pretreated glyphosate mother liquor to membrane concentration separation; placing the diluted glyphosate solution obtained from the membrane concentration separation on the feed side of forward osmosis; placing the pretreated PMIDA mother liquor on the draw solution side of forward osmosis; performing ion exchange recovery treatment on the concentrated feed solution; and performing membrane concentration separation and recovery treatment on the diluted draw solution. The present invention utilizes the combined treatment method for glyphosate mother liquor and PMIDA mother liquor for resource recycling. At the same time, by using the salt concentration difference between the glyphosate mother liquor and the PMIDA mother liquor, forward osmosis technology is adopted to concentrate the glyphosate mother liquor and dilute the PMIDA mother liquor respectively, greatly improving the subsequent membrane treatment effect.