48 results about "In situ adsorption" patented technology

The invention discloses a deep coal rock in-situ gas content and adsorption / free gas proportion calculation method and device, and relates to the field of reservoir resource potential evaluation.The deep coal rock in-situ gas content and adsorption / free gas proportion calculation method comprises the steps that an isotope fractionation model coupled with a double-dispersion pore structure (matrix pores and kerogen pores) and a multi-gas transmission mechanism (viscous flow, Knudsen diffusion and surface diffusion) is constructed; the accumulated analytic gas quantity and the apparent isotope value of the produced gas obtained through solving are fitted with the actually measured accumulated analytic gas quantity and the apparent isotope value of the produced gas, and key parameters corresponding to the optimal fitting result are obtained; and determining the in-situ gas content, the in-situ adsorption gas proportion and the in-situ free gas proportion according to the productivity evaluation parameters at the initial moment corresponding to the optimal key parameters. According to the method, the in-situ gas content, the in-situ adsorbed gas proportion and the in-situ free gas proportion of the deep coal rock are calculated on the basis of an isotope fractionation model coupled with a double-dispersion pore structure and a multi-gas transmission mechanism, so that the gas resource content of the deep coal rock is predicted.

The invention discloses a seawater trace heavy metal on-line monitoring probe error automatic correction method, and belongs to the technical field of marine environment monitoring automatic control, and the method comprises the following steps: obtaining seawater fluid parameters and probe surface microorganism adhesion thickness data; generating a sensitive film deformation prediction parameter according to the data; dynamically synthesizing a seawater osmotic pressure standard solution based on the parameters; an in-situ adsorption efficiency coefficient is obtained through adsorption efficiency verification; comparing the reference efficiency coefficient to calculate an electrochemical compensation parameter of the probe; dynamically adjusting deformation parameters based on the microorganism adhesion thickness to generate a voltage compensation instruction; and finally, outputting probe correction control parameters through correction and superposition of the electrochemical parameters and the voltage instruction. By constructing a feedforward-feedback composite control system, predictive compensation for physical disturbance and real-time feedback calibration based on dynamic osmotic pressure standard liquid are combined, decoupling suppression for multi-source disturbance is achieved, and therefore the autonomous closed-loop control capacity of a probe is established.

The invention discloses a method for preparing a silicon-carbon composite negative electrode material through an electrostatic self-assembly technology, and belongs to the technical field of lithium ion battery negative electrode materials. According to the invention, lignin is used as a biomass carbon source and lauryl sodium sulfate (SDS) and poly (diallyldimethylammonium chloride) (PDDA) are used as activators through a simple electrostatic self-assembly technology; a proper amount of nano silicon and PDDA are subjected to in-situ adsorption, and lignin and SDS are subjected to in-situ adsorption; a self-assembly process is carried out through the positive and negative charge attraction effect among colloidal particles, so that effective compounding of the nano silicon particles and the biomass carbon is realized; and performing vacuum drying, and performing one-stage sintering in a tubular furnace to obtain the silicon-carbon composite negative electrode material. Based on the problems of non-uniform particle size, easy agglomeration and great abrasion of a silicon-carbon composite material in a traditional mechanical synthesis technology, the invention improves the compounding efficiency of the silicon-carbon material and improves the problems of volume expansion of a silicon negative electrode, slow migration rate of lithium ions, poor cycle performance and the like.

The invention provides a preparation method of triphenylchloromethane, and belongs to the technical field of medical intermediates. The preparation method comprises the following steps: preparing a suspension from pure benzene, a composite catalyst and an adsorbent, dropwise adding carbon tetrachloride to obtain a reaction solution, heating the reaction solution to 60-80 DEG C, treating with 808nm laser while stirring, and performing post-treatment to obtain the triphenylchloromethane. The composite catalyst catalyzes pure benzene and carbon tetrachloride to react to generate triphenylchloromethane, hydrogen chloride is released, the adsorbent can adsorb hydrogen chloride in situ, and acid corrosion and catalyst poisoning can be prevented while forward proceeding of the reaction is maintained; the composite catalyst and the adsorbent are used for realizing catalysis-adsorption synergistic promotion of forward proceeding of the reaction, so that the dosage of the catalyst is reduced, the reaction time is shortened, the output of wastewater is reduced, and the reaction yield and the purity of triphenylchloromethane are improved.

The application discloses an oil dechlorination agent, a preparation method and application thereof. The dechlorination agent comprises a supported nickel-based catalyst, the supported nickel-based catalyst comprises an active component and a carrier, the active component is loaded on the carrier, and the active component at least comprises a first active component nickel. The dechlorination agent prepared by compounding the nickel-based catalyst and the adsorbent has good dechlorination effect, the oil dechlorination rate can reach more than 98%, and the adsorbent can adsorb generated HCl in situ, thereby avoiding the corrosion of HCl on equipment.

The invention provides a polluted site heavy metal vertical migration monitoring device and method. The monitoring device is provided with a barrel-shaped frame and bottom supporting legs, an adsorption resin layer is arranged on the barrel-shaped frame, an isolation medium layer and a filtering medium layer are arranged on the upper portion and the lower portion of the adsorption resin layer respectively, and a sensor is arranged on the filtering medium layer. The monitoring structure is arranged in a soil layer needing to be monitored, soil particles are intercepted by the filter medium layer, vertically migrated heavy metal ions are adsorbed by the adsorption resin layer, the ion content difference change of the upper and lower layer sensors is monitored, and the saturation condition of the resin layer is judged. And when the monitoring time is up, controlling the bottom of the resin layer to be closed, pumping an eluent to elute heavy metal ions and regenerate the resin, collecting the eluent, and analyzing and calculating the vertical migration amount of the heavy metal in the soil layer in a certain period. Heavy metal ions passing through the section in the water infiltration process are collected by adopting a resin in-situ adsorption method, so that monitoring is realized, and the method has the advantages of simple layout, reutilization and the like.

The invention discloses a method for producing high-purity doxorubicin through fermentation of streptomyces peucedanum var. Peucedanum X121-56-2 and in-situ extraction of LX-20 resin, which comprises the following steps: preparing a high-density seed solution through a specific seed culture medium and a culture process, and then inoculating the high-density seed solution into a fermentation culture medium containing a composite carbon and nitrogen source and LX-20 macroporous adsorption resin; and fermenting under the conditions of controlled temperature, pH, ventilation and dissolved oxygen. In the fermentation process, adriamycin is adsorbed by LX-20 resin in situ, the yield is effectively increased, and the extraction process is simplified. The specific strain is combined with the LX-20 resin technology for the first time, the adriamycin yield can reach 530 mg / L at the maximum under the 15L tank scale, the purity of a crude product directly extracted from the resin can reach 58%, and the method has the outstanding advantages of being high in yield and purity, low in cost, easy to amplify and the like.

The application discloses a MgAl layered double metal oxide supported Cu-based catalyst and a preparation method thereof and application of the catalyst in preparation of low-carbon alcohols from biomass synthesis gas in-situ adsorption of CO2. The catalyst is prepared by using modified MgAl-LDH powder prepared by co-modification of polymethyl methacrylate and calcium oxide as a carrier and Cu-based multi-metal oxide as an active component, and the catalyst has high total carbon conversion (20% to 30%) and high low-carbon alcohol yield (≥60%) in the reaction of preparing low-carbon alcohols from biomass synthesis gas, by virtue of high adsorption of CO2 of MgAl layered double metal oxide obtained after calcination of the catalyst and high dispersion of Cu-based multi-metal oxide on the carrier. The catalyst preparation method is simple, low in cost and easy to realize large-scale preparation, and provides an ideal selection for industrial production of low-carbon alcohols from biomass synthesis gas.

The application provides a method for continuously removing impurities in a neodymium-iron-boron waste hydrochloric acid optimum solution in situ and application thereof, and the method comprises the following steps: adding the oxidized hydrochloric acid optimum solution into an overflow reactor, controlling the adding speed to make the oxidized hydrochloric acid optimum solution mix with the bottom liquid in the overflow reactor, adjusting the pH of the mixed solution of the hydrochloric acid optimum solution and the bottom liquid in the overflow reactor to a set value by using a neutralizing agent, so that the content of free iron ions in the mixed solution is lower than a set concentration, thereby obtaining a neutralized solution, and the obtained neutralized solution is aged to obtain a rare earth solution from which impurity elements are removed. The method realizes the hydrolysis and co-precipitation of iron and aluminum elements, and realizes the in-situ adsorption of impurity elements such as fluorine and boron by using the strong adsorption capacity of the hydrolysis product to fluorine and boron, thereby realizing the efficient removal of impurities such as iron, aluminum, fluorine and boron in the hydrochloric acid optimum solution. The method also reduces the entrainment loss of rare earth elements in the process of removing impurity elements, and improves the filtration performance of the impurity removal residue.

The application provides a preparation method of triphenyl chloromethane and belongs to the technical field of pharmaceutical intermediates. The preparation method comprises the following steps: obtaining a suspension by using pure benzene, a composite catalyst and an adsorbent, then adding carbon tetrachloride drop by drop to obtain a reaction liquid, stirring and treating the reaction liquid with 808 nm laser when the reaction liquid is heated to 60-80 DEG C, and then performing post-treatment to obtain the triphenyl chloromethane. The composite catalyst catalyzes the reaction of pure benzene and carbon tetrachloride to generate triphenyl chloromethane and release hydrogen chloride, and the adsorbent can adsorb hydrogen chloride in situ, thereby preventing acid corrosion and catalyst poisoning while maintaining the forward progress of the reaction. The composite catalyst and the adsorbent realize catalysis-adsorption synergistic promotion of the forward progress of the reaction, thereby reducing the catalyst consumption, shortening the reaction time, reducing the wastewater generation amount, improving the reaction yield and the purity of the triphenyl chloromethane.

The invention discloses a method for in-situ preparation of anhydrous ferric trichloride and application, and the method comprises the following steps: placing ferric trichloride hexahydrate in a reactor, introducing hydrogen chloride gas, and then heating and evaporating to remove crystal water in the ferric trichloride hydrate under the conditions that the reaction temperature is 70-100 DEG C and the vacuum degree is 0.01-0.03 MPa to obtain the anhydrous ferric trichloride. After the reaction is completed, the system is cooled, and NO introduced into the reactor and anhydrous ferric trichloride are subjected to a gas-solid adsorption chemical reaction so as to be absorbed and removed. In the process, hydrolysis of Fe < 3 + > is inhibited by the introduced hydrogen chloride gas, so that the obtained anhydrous ferric trichloride has higher activity and adsorption capacity. The problem of deliquescence of anhydrous ferric trichloride in the application process is solved, nitric oxide gas can be adsorbed in situ, and the purpose of flue gas purification is achieved.

This invention discloses a self-sustaining air-conditioning decorative wall hanging based on phase change thermal induction and in-situ surface adsorption, belonging to the field of passive air conditioning technology for human living environments. It includes a functional decorative panel assembly with a three-dimensional microscopic adsorption texture layer attached to its substrate surface; a thermal induction airflow guiding backplate, disposed on the back of the functional decorative panel assembly, forming a vertical acceleration airflow duct; a phase change heat storage material, attached to the inner side of the thermal induction airflow guiding backplate or integrated into the thermal induction airflow guiding backplate material, forming a conical structure with a high center and low sides in the vertical acceleration airflow duct; an adsorption purification module installed within the vertical acceleration airflow duct; and a volatile organic compound (VOCs) adsorption grid attached to the inner side of the functional decorative panel assembly. Utilizing the indoor temperature difference and the latent heat released by the phase change heat storage material, a thermal buoyancy field is formed within the vertical acceleration airflow duct, driving indoor air flow. This invention achieves self-sustaining air conditioning of the decorative wall hanging without electricity or noise.

The invention belongs to the technical field of antibiotic degradation photocatalysts, and provides a double-Z-type C3N4 / CuS / MnO2 ternary composite nanometer heterojunction material and a preparation method and application thereof in order to remarkably improve the antibiotic removal performance of C3N4. CuS nanoflowers are deposited on the surface of C3N4 through a chemical coprecipitation method, and then MnO2 nanoparticles continue to be deposited on the surface of C3N4; wherein the loading capacity of the CuS nanoflowers is 30%, and the loading capacity of the MnO2 is 1%-6%. The efficiency of in-situ adsorption and photocatalytic degradation of tetracycline (TC) of C3N4 / 30CuS / 3MnO2 is greatly improved, and the tetracycline degradation efficiency within 50 min is as high as 93% and is about 2.97 times of that of C3N4. The C3N4 / 30CuS / 3MnO2 with the double-Z type heterostructure has a huge removal potential in the aspect of organic pollutants.

The invention discloses an oil dechlorinating agent and a preparation method and application thereof, the dechlorinating agent comprises a supported nickel-based catalyst, the supported nickel-based catalyst comprises an active component and a carrier, the active component is supported on the carrier, and the active component at least comprises a first active component nickel. The dechlorinating agent formed by compounding the nickel-based catalyst and the adsorbent is adopted, the dechlorinating effect is good, the dechlorinating rate of oil products can reach 98% or above, the adsorbent can adsorb generated HCl in situ, and corrosion of HCl to equipment is avoided.

The invention discloses a catalytic material in-situ adsorption / desorption analysis system and method based on nuclear magnetic resonance analysis characterization, and relates to the technical field of instrument preparation and in-situ analysis. Comprising a catalytic material sample batch processing device, a water-free and oxygen-free sample transfer device and an in-situ solid nuclear magnetic analysis device. According to the invention, a multi-channel parallel batch parallel processing mode is adopted, so that the sample processing and analysis efficiency is effectively improved, and accurate temperature control and vacuum degree control are realized.

The invention relates to the technical field of electroplating waste liquid treatment, in particular to a resourceful treatment method for electroplating waste liquid. The trace metal impurities in the waste liquid are adsorbed in situ by the phosphonic acid chelating resin in a strong acid system and are converted into the heterogeneous catalyst, and the continuous / pulse combined feeding strategy of potassium hydrogen peroxymonosulfate is matched, so that deep mineralization of stubborn organic matters and accurate separation of impurities such as iron and nickel are realized; and high-purity copper sulfate pentahydrate crystals are prepared through copper type resin buffering and a specific crystallization process on the premise of not introducing exogenous impurities. The method is free of secondary pollution, realizes high-valued total recovery of ultra-pure resources in the electroplating waste liquid, has remarkable economic and environmental benefits, and is suitable for resource treatment of the PCB and semiconductor electroplating waste liquid.

The application discloses a high-nickel positive electrode material based on a zirconium-based organic metal skeleton UiO-66 dynamic protection mechanism and a preparation method and application thereof. 4+ In the process of battery electrochemical cycle, the porous structure of UiO-66 is used to in-situ adsorb electrolyte corrosion components and capture dissolved transition metal ions, and Zr 4+ is released to in-situ dope into the positive electrode surface layer lattice, so that the dual dynamic synergistic protection of interface passivation and lattice pinning is simultaneously realized. The method effectively inhibits lithium-nickel cation mixing, lattice oxygen precipitation, micro-crack expansion and transition metal dissolution of the high-nickel positive electrode, and significantly improves the structural stability and long cycle life of the material. The application has a simple process, is compatible with the existing battery manufacturing process, and has a good industrial application prospect.

The present invention provides a clean coal and a preparation method thereof, belonging to the technical field of coal products. The method comprises the following steps: (1) dispersing starch in water, stirring evenly, and then fully gelatinizing the mixture; (2) adding a sulfur-fixing agent to the gelatinized liquid, and centrifuging to obtain a starch gelatinized liquid containing the sulfur-fixing agent; (3) crushing the coal to obtain coal particles; (4) transporting the coal particles to a fluidized bed, spraying the starch gelatinized liquid containing the sulfur-fixing agent on the particles while the particles are suspended, and drying to obtain coal particles adsorbed with the sulfur-fixing agent and gelatinized starch. The method dissolves a soluble sulfur-fixing agent in the starch gelatinized liquid, and then in situ adsorbs the starch liquid onto the coal particles, so that the soluble sulfur-fixing agent is uniformly adsorbed into the coal. The sulfur in the coal reacts efficiently in situ with the adsorbed soluble sulfur-fixing agent, effectively improving the combustion efficiency and sulfur-fixing effect of the coal, while not causing any negative effects on the boiler.

The application belongs to the technical field of photothermal conversion materials, and particularly relates to a photothermal conversion coating, a preparation method thereof and a photothermal conversion device. The preparation method of the photothermal conversion coating comprises the following steps: obtaining a porous substrate, adsorbing an initiator in the porous substrate in situ to obtain a modified porous substrate, and performing a gas phase polymerization reaction on the modified porous substrate with a conjugated polymer monomer and a chlorine source to form a chlorine-doped photothermal conversion coating on the surface of the porous substrate in situ. In the preparation method of the photothermal conversion coating, the initiator is adsorbed in the porous substrate in situ, and the conjugated polymer monomer is diffused in the form of gas on the surface layer of the substrate, so that the monomer is polymerized in the pores of the substrate in situ, and the combination firmness of the coating and the substrate is improved. Meanwhile, the structuralization and doping effects improve the utilization rate of the coating to light energy, so that the photothermal conversion coating has the characteristics of high solar spectrum absorption efficiency, wide light absorption range, high absorption degree and high utilization rate, and exhibits super strong photothermal effect.

The invention discloses a method for directionally regulating and controlling a composite catalyst in a lithium battery pyrolysis process, and relates to the technical field of lithium batteries, and the method comprises the following operation steps: S1, raw material selection: selecting one or more of cobalt nitrate, nickel sulfate and manganese chloride as a metal salt precursor, selecting a molecular sieve as a carrier raw material, and preparing a precursor; deionized water, ammonia water and citric acid are selected as auxiliary raw materials; s2, active component loading: weighing a metal salt precursor according to a preset proportion, adding the metal salt precursor into deionized water, and stirring under a constant-temperature water bath condition of 40-60 DEG C until the metal salt precursor is completely dissolved to form a precursor solution; according to the method for directionally regulating and controlling the composite catalyst in the lithium battery pyrolysis process, the transition metal oxide-molecular sieve composite catalyst is designed, and a catalytic regulation node is moved forwards to a lithium battery pyrolysis reaction stage, so that the limitation of tail end treatment of traditional pyrolysis tail gas is broken through; and the directional decomposition of the electrolyte and the binder and the in-situ adsorption of the harmful gas are synergistically carried out.

The invention relates to a synthesis method and a synthesis processing system of quinclorac oxadiazon, and belongs to the technical field of pesticide synthesizing.The synthesis method comprises the steps that firstly, through mediation of a silane coupling agent, nanometer copper oxide particles are evenly loaded in mesopores of an adsorption type molecular sieve, and then the adsorption type molecular sieve, 3, 7-dichloro-8-quinolinecarboxylic acid and N, N-dimethylformamide are mixed to form the quinclorac oxadiazon. According to the present invention, substances such as N, N-dimethylformamide and the like are subjected to acyl chloride, esterification and transposition rearrangement reactions, the copper oxide nanoparticles in the adsorption type molecular sieve and N, N-dimethylformamide achieve the synergistic effect, and can form the active intermediate with thionyl chloride, such that the activation energy of the acylating chlorination reaction is reduced, and the acylating chlorination reaction time is shortened; the mesoporous structure of the MCM-41 molecular sieve can adsorb hydrogen chloride gas generated in the acylating chlorination reaction in situ through Van der Waals' force and capillary coagulation, the conversion rate of the acylating chlorination reaction is improved, and the in-situ removal of hydrogen chloride can also reduce the use amount of an acid-binding agent triethylamine in the subsequent esterification reaction, so that the generation of triethylamine hydrochloride by-products is reduced, and the material loss is reduced.

This invention discloses a fluorite crystal impurity leachate based on microbial metabolites and its preparation process, relating to the field of fluorite crystal impurity leachate preparation technology. The raw materials include: microbial metabolic fermentation broth, chelation solution, synergistic solution, modified glucosamine magnesium phosphate microsphere slurry, modified hydroxyapatite nanosphere slurry, modified hydroxypropyl methylcellulose ether slurry, and deionized water. In this invention, the addition of modified glucosamine magnesium phosphate microsphere slurry significantly improves the dispersibility and stability of the microspheres, enabling in-situ adsorption of free fluoride ions in the system, eliminating the inhibitory effect of fluoride ions on microbial metabolism, and simultaneously helping to stabilize the pH of the leaching system, providing a suitable environment for impurity leaching. It also synergistically enhances the solid-liquid separation effect without reducing the grade of fluorite concentrate. The addition of modified hydroxyapatite nanosphere slurry provides excellent selective adsorption capacity, preferentially adsorbing difficult-to-remove impurities such as quartz and silicates, improving the precision of deep impurity removal.

The invention discloses an electrolyte for a thermal battery and a preparation method of the electrolyte, an adsorbent is magnesium carbonate, and the specific preparation method comprises the following steps: uniformly mixing magnesium carbonate and fused salt according to a certain mass ratio, then carrying out high-temperature infiltration in heating equipment, and after the infiltration is finished, crushing and sieving the electrolyte to obtain electrolyte powder of the thermal battery. The electrolyte is prepared by adopting a one-step infiltration method, and the fused salt can be adsorbed in situ while magnesium carbonate is decomposed, so that the adsorption efficiency of the fused salt is improved; the electrolyte preparation process is simplified, the electrolyte preparation time is shortened, and the electrolyte preparation cost is reduced.

The invention discloses a Janus fabric strain sensor with switchable wettability and a preparation method thereof. The invention belongs to the technical field of stress sensing. The invention designs a Janus fabric strain sensor with switchable wettability to solve the problems that an existing flexible sensor is prone to signal distortion and sweat accumulation interference in a humid environment, and a traditional Janus structure is static and non-adjustable in wettability and poor in environmental adaptability. The sensor is constructed through a swelling and in-situ adsorption process, has a hydrophobic inner layer and a light / thermal response adjustable outer layer, can be changed into a hydrophilic state under ultraviolet irradiation, and is recovered into a hydrophobic state through thermal treatment. The dynamic wetting management of the sensing interface is realized, the signal stability and wearing comfort of the sensor in the complex wet environment are remarkably improved, and the method has important value for developing a new generation of self-adaptive intelligent textiles.

This invention relates to the field of plant extraction technology and discloses a process for extracting rose petals. The process includes: slurrying fresh rose petals and adjusting the pH; suspending a mesh cage filled with macroporous adsorption resin in the slurry; adding a compound enzyme preparation for isothermal enzymatic hydrolysis; utilizing the difference between the mesh cage pore size and the material particle size to achieve physical phase isolation between the resin and the petal residue; and utilizing the resin to adsorb the released aroma components in situ during enzymatic hydrolysis. After enzymatic hydrolysis, keeping the mesh cage in place, inorganic salt electrolytes are directly added to the slurry, and the temperature is raised to boiling for steam distillation. Desorption is achieved through the synergistic effect of thermal field and salting-out, and the distillate is collected to obtain rose essential oil. This invention relieves the inhibition of enzymatic hydrolysis products through in-situ adsorption, improving the conversion rate of bound glycosides. The use of inorganic salt-assisted steam distillation instead of organic solvent elution significantly improves the essential oil yield while retaining key aroma components such as phenylethyl alcohol, avoiding solvent residue.

A method for sulfidation modification of iron-containing solid waste for chromium and thallium fixation belongs to the field of functional materials. Using iron-rich industrial solid waste as raw material, after grinding and sieving, it is activated in a water bath using organic carboxylic acids. Through a complexation reaction, the inert iron structure within the solid waste is activated, yielding a carboxylic acid-activated solid waste intermediate. This intermediate is then mixed with a sulfiding agent and subjected to a sulfidation reaction in a high-sodium environment to obtain a NaFeS2·2H2O compound, which is uniformly loaded onto the surface of the iron-containing solid waste. This material can achieve synergistic fixation of Cr(VI) reduction and in-situ adsorption of Cr(III) within a pH range of 2.5-11, expanding the pH applicability range of simple sulfur-iron reducing agents. It can also achieve the adsorption and fixation of typical toxic metal ions Tl⁺ in the environment. This invention achieves functionalization of the surface of iron-containing solid waste through simple sulfidation reaction control. The preparation process is simple, low-cost, and easy to synthesize in batches, thus realizing the resource reuse of solid waste.

The invention relates to the technical field of zinc hydrometallurgy, in particular to a method for removing trace impurity selenium in a zinc hydrometallurgy solution through in-situ adsorption, which comprises the following steps: S1, adding a strong oxidant into the zinc hydrometallurgy solution containing low-valence Mn < 2 + > ions, and oxidizing the Mn < 2 + > ions to generate MnO2 precipitate; and S2, adsorbing and removing trace impurity selenium in the solution by using high-activity MnO2 generated by in-situ oxidation. The method has a high removal rate (the highest removal rate can reach 98.46%, and the selenium concentration can reach 20 ng / ml or below) for the trace selenium (1-10 mg / L) in the liquid after zinc powder replacement, does not need additional chemical reagents except the oxidizing agent, is easy and convenient to operate, low in treatment cost, suitable for in-situ efficient removal of the trace impurity selenium in zinc hydrometallurgy production, capable of improving the purity of the zinc electrodeposition liquid and environmentally friendly, and the method is suitable for in-situ efficient removal of the trace impurity selenium in zinc hydrometallurgy production and capable of improving the purity of the zinc electrodeposition liquid.

The application discloses a kind of seawater trace heavy metal on-line monitoring probe error automatic correction method, belong to marine environment monitoring automatic control technical field, it includes obtaining seawater fluid parameter and probe surface microorganism attachment thickness data;According to the data generation sensitive membrane deformation prediction parameter;Based on the parameter dynamic synthesis seawater osmotic pressure standard solution;Through adsorption efficiency verification obtains in-situ adsorption efficiency coefficient;Comparing benchmark efficiency coefficient calculates probe electrochemistry compensation parameter;Based on microorganism attachment thickness dynamic adjustment deformation parameter generates voltage compensation instruction;Finally through electrochemistry parameter and voltage instruction's correction superposition output probe correction control parameter.The application is combined by constructing feedforward-feedback compound control system, the predictive compensation to physical disturbance and real-time feedback calibration based on dynamic osmotic pressure standard solution are combined, the decoupling inhibition of multiple source disturbance is realized, so as to establish the self-closing loop control ability of probe.

The application discloses a self-cleaning type aquatic product detection sealing bag and a preparation method and application thereof, and relates to the technical field of food safety detection. The sealing bag is a three-layer composite structure, which is integrally integrated by a food-grade plastic sealing film, a flexible PDMS base and an ABD-MoS2 SERS detection layer through a hot pressing process. The ABD-MoS2 nanosheet is prepared by a CVD one-step method, is stably loaded on the PDMS base by optimizing a wet transfer process, and is hot-pressed with the food-grade plastic sealing film to obtain a finished product. The prepared sealing bag can closely fit the irregular curved surface of aquatic products, realizes in-situ adsorption and detection of target objects, does not need sampling treatment, and is simple to operate. The detection limit of the sealing bag for dye residues such as methylene blue is as low as 10 ‑8 M, which meets the accuracy requirements of aquatic product residue detection, and has self-cleaning and recycling performance. After detection, the sealing bag can degrade the residual target objects under light, and is suitable for detection scenes directly contacting aquatic products.

The invention relates to the technical field of high polymer materials, in particular to a rigidity-increasing nucleating agent with anisotropic shrinkage balance as well as a preparation method and application of the rigidity-increasing nucleating agent. The nucleating agent comprises a carboxylate organic nucleating agent A, a phosphate organic nucleating agent B, an inorganic carrier C and a surface compatible modifier D. The inorganic carrier C is selected from talc, mica powder, basic magnesium sulfate whiskers and a combination thereof and is loaded on the surface of the carrier in an in-situ adsorption or deposition mode to form organic / inorganic composite primary particles. A coating layer with a polyolefin compatible chain segment is formed through surface compatibility modification, and sphere-like secondary particles with controllable particle sizes are formed through spray drying. 0.05-0.5 wt% of the nucleating agent is added into polypropylene and other crystalline polyolefin resins, so that the flexural modulus and the thermal deformation temperature can be maintained or improved, the shrinkage difference in the flowing direction and the vertical direction can be remarkably reduced, the anisotropic shrinkage ratio of a product is improved, the buckling deformation of the injection molding product is remarkably reduced, and the dimensional stability is improved.