1271results about How to "Achieve enrichment" patented technology

The preparation process of selenium-rich edible fungus with activated selenium ore as selenium source belongs to the field of biological selenium resource converting technology. Natural selenium ore as the selenium source is crushed, activated and water extracted; the selenium containing water solution is used in compounding culture medium; and edible fungus is cultured to realize selenium conversion and enrichment, with the selenium-enriching cultured mycelium containing organic selenium in 50-600 mg / kg. The present invention realizes the conversion and enrichment of organic selenium while producing edible fungus with rich active polysaccharide content.

The invention discloses a method for quickly starting a completely autotrophic nitrogen removal over nitrite process on sewage on the conditions of constant temperature and low ammonia nitrogen and belongs to the field of city sewage treatment and reutilization. The completely autotrophic nitrogen removal over nitrite (CANON) process is started in a biological filter tank reactor and comprises the following steps: firstly, nitrifying sludge by using an inoculating part, and performing aerobic nitrification start with sufficient oxygen supply to build a nitrosobacteria-dominated and nitrobacterium-dominated microorganism system; inhibiting the growth of nitrobacterium through intermittent aeration / anaerobism and enriching anaerobic ammonium oxidation bacteria; and finally, performing continuous aeration, controlling ammonia nitrogen to be oxidized to a stage of nitrous acid through restrictive oxygen supply, and optimizing microenvironment where nitrosobacteria and anaerobic ammonium oxidation bacteria coexist so as to successfully start the CANON process. By using the method, the problem that the growth enrichment of the anaerobic ammonium oxidation bacteria is slower for a long term can be solved; moreover, the starting way is simple and feasible, and the difficulty of the start of a single-stage autotrophic nitrogen removal system is reduced; and therefore, a method is provided to start the CANON process on stimulated waste water on the conditions of constant temperature and low ammonia nitrogen.

The invention discloses a method of detecting gene mutation based on Blocker primers and ARMS primers, and a kit. According to the invention, corresponding Blocker primers are designed according to an annealing temperature, the Blocker primers are combined with a wild-type template under the annealing temperature of the Blocker to block amplification of the wild type, and simultaneously an ARMS technology is used to reduce amplification of the wild-type background. The method integrates a Blocker enrichment technology and an ARMS fluorescent quantification PCR technology in one reaction system, and thus realizes enrichment and identification for the mutated genes for one step, reduces operation steps, and improves detection sensitivity and singularity.

The invention relates to a method for carrying out desalination and zero-discharge processing of power plant desulphurization wastewater by adopting an electrodialysis technology. The method comprises the following steps: neutralizing, precipitating, coagulating and filtering the power plant desulphurization wastewater and removing CODs (Chemical Oxygen Demands), heavy metals, F-ions, gypsum, silicon dioxide, hydroxide of iron and aluminum and other insoluble particles in waste water; separating C1-ions and other monovalent ions in clear liquid from SO3<2->, SO4<2-> and other divalent ions through nanofiltration; desalinating and concentrating water produced by the nanofiltration by adopting a multistage countercurrent reverse electrodialysis method. The method has the advantages that the concentration of the Cl-ions in nanofiltration concentrated water and electrodialysis freshwater generated by the method is lower, and the nanofiltration concentrated water and the electrodialysis freshwater can be returned for flue gas desulfurization; the content of NaCl in a small amount of electrodialysis concentrated water produced reaches above 12 percent, the bivalent ions and other impurities are removed by nanofiltration, and the electrodialysis concentrated water is further evaporated and concentrated, so that chlorine-alkali industry electrolytes and NaCl salt can be obtained. Through the method, the zero-discharge treatment and the resource utilization of the desulfurization wastewater can be realized.

The invention discloses a method for extracting and purifying DNA, comprising the following steps: 1) pre-treatment: a biological sample is in contact with pre-treated lysis solution, and solid substance adhering to biological cells is removed to obtain rude lysis solution; 2) nucleic acid adsorption: the rude lysis solution obtained in step 1 is mixed with lyse combined liquid and magnetic bead suspension to form a solution system containing magnetic nanosphere-DNA composite body, and the magnetic nanosphere-DNA composite body in the solution system is collected; 3) washing: the magnetic nanosphere-DNA composite body obtained in step 2 is successively washed with a cleaning solution I and a cleaning solution II, and then DNA is dissolved out by spent regenerant. The method provided by the invention has 90% of the DNA extracting efficiency, the extracted DNA can be used in down stream analysis operation, such as STR multiplex amplification, DNA sequencing, DNA quantitation and the like.

The invention discloses a purification process of ganoderma lucidum spores powder. The process comprises the following steps: removing shells of shell-broken ganoderma lucidum spores powder; after immersing by a 20-95% ethanol solution in volume fraction and water, separating shells to obtain a shell-broken ganoderma lucidum spores powder filtrate and shells of ganoderma lucidum spores powder; concentrating and drying the filtrate to obtain purified ganoderma lucidum spores powder; preparing shell alcohol extract solid powder, dichloromethane extract solid powder, ethyl acetate extract solid powder, shell aqueous extract solid powder, normal butanol extract solid powder, water phase powder or chitosan from shells of ganoderma lucidum spores powder by virtue of a comprehensive recycling process. According to the invention, ineffective component (shells) of the spores powder is separated and effective components (polysaccharide, triterpene and the like) are enriched by breaking shells and purifying, so that the content of the effective components of the purified ganoderma lucidum spores powder is remarkably improved and the effect is remarkably enhanced. The shells are comprehensively utilized, so that the economic benefit is improved.

The invention discloses a reagent for extracting and purifying DNA, comprising the following substances: preprocessing lysis solution with pH of 7.4-8.5: water serves as solvent, and solute comprises the substances with the following final concentration: 10-100mM of buffer salt, 0.5%-5% of surface active agent, 1-100mM of chelating agent, 50-150mM of soluble salt, and 0.2-4mg / ml of protease K; pyrolysis combined liquid with pH of 6.4-7.4: water serves as solvent, and solute comprises the substances with the following final concentration: 20-150mM of buffer salt, 3-8 of MChaotropic salt, 1-10% of surface active agent, 0.5-4% of amphoteric ion detergent, 10-100mM of chelating agent and 15-30% of alcohol; cleaning solution I: water serves as solvent, and solute comprises the substances with the following final concentration: 4-6 of MChaotropic salt, 25-50% of alcohol and 10-100mM of chelating agent; cleaning solution II is 75% of ethanol water solution; spent regenerant is TE (10mM Tris-HCl, 1mMEDTA, and pH is 8.0); magnetic bead suspension is nanoscale silicone coated magnetic microsphere (50-100mg / ml).The DNA extracting efficiency is as high as 93.67% by adopting the reagent.

The invention relates to a graphene oxide-based composite membrane for treating radioactive wastewater and a preparation method thereof.According to the membrane, a porous carrier is pre-modified through a silane coupling agent, and the graphene oxide-based composite membrane is prepared from a polydopamine and graphene oxide compound by adopting a vacuum filtration method.The method is characterized in that a polydopamine bionic self-assembly technology and a graphene oxide sheet are compounded, the size dimension of a membrane nanochannel is accurately adjusted, the selectivity or the rejection rate of the membrane on radionuclide ions is increased, and concentration and removal of radionuclide are achieved.According to the graphene oxide-based composite membrane for treating the radioactive wastewater and the preparation method thereof, the preparation process is simple and easy to operate, good repeatability is achieved, the water flux and ion rejection rate of the composite membrane are significantly increased, the separating property of a long-time operating membrane is stable, and a wide application prospect in the fields such as membrane-method radioactive wastewater treatment and heavy metal wastewater treatment is achieved.

The present invention discloses a continuous flow shortcut nitrification-anaerobic ammonium oxidation biological denitrification method based on granular sludge, and an apparatus. The method comprises: 1) carrying out sludge inoculation culture, and carrying out an active sludge adaptation period; 2) starting a shortcut nitrification-anaerobic ammonium oxidation reaction; 3) performing an anaerobic ammonium oxidation granular sludge formation and growth period; and 4) performing a stable operation period of a granular sludge continuous flow system. The apparatus comprises a water inlet tank, a bioreactor, a sedimentation tank and a hydraulic screen filter, wherein the water inlet tank, the bioreactor, the sedimentation tank and the hydraulic screen filter are sequentially communicated, the influent of the water inlet tank is communicated with high ammonia nitrogen wastewater, the effluent is communicated with the bioreactor, the concentrated sludge on the bottom of the sedimentation tank is communicated with the bioreactor through a sludge reflux pump, a fixation filler, a stirrer, a filtration screen and an aeration head communicated with an air compressor are arranged inside an anoxic reactor, the sedimentation tank is provided with a clear overflow port communicated with the hydraulic screen filter through a pipeline, the effluent of the hydraulic screen filter is the final effluent, and the retained granular sludge refluxes to the bioreactor.

The invention discloses a sludge drying and incinerating integrated zero-discharge treatment system and treatment process, belonging to the technical field of harmless treatment of sludge. The treatment system is composed of a garbage storage pit, an air separation device, a garbage-sludge incinerator, a cyclone separator, a waste heat boiler, a bag-type dust remover, a turbo-generator set, a two-stage drier, a dried sludge storage bin, a fine powder separator, a condenser, a steam-water separator, and a carbon dioxide purifying and catching system. According to the invention, the dried sludge burns sufficiently in oxygen-rich atmosphere, the auxiliary fuel is saved, the incinerating waste heat is efficiently recovered and utilized, CO2 in discharged flue gas is cooled, purified, compressed and liquefied to ultimately obtain high-purity CO2 which can be used for industrial application, other impurities are recovered, dioxin and other extremely toxic substances are collected separately and conveyed to qualified divisions for unitized treatment, the purposes of treating a waste with another waste and promoting harmless treatment with resource treatment are realized, the waste treatment cost is lowered and the energy utilization rate is improved.

The invention discloses a triazine weedicide, and metabolite molecular engram polymer microspheres, a preparation method and an application thereof, which relate to molecular engram polymer microspheres and a preparation method and an application thereof and are used for solving the problem that the conventional molecular engram polymer can only specially absorb one kind of substance and realizing the effect of separating and enriching a plurality of triazine pesticide residues in a sample respectively. The molecular engram polymer microspheres are prepared by the following steps of: dissolving double template molecules and methacrylic acid into acetonitrile; oscillating; adding trimethylolpropane trimethylacrylate and azobisisobutyronitrile; performing ultrasonic treatment, charging nitrogen, removing oxygen and sealing; and heating in a constant-temperature water bath, cooling, grinding, sieving, eluting and drying. The molecular engram polymer microspheres are applied to a filling material of a solid phase extraction column. A product obtained in the invention has the advantages of high specificity, large absorption amount, wide application range, simple method and low cost. High specific separating and enriching characteristics on the triazine weedicide are achieved, the recovery rate is 65-110 percent, and the requirement of multiple residues can be met.

The invention relates to a riverbank ecological buffering band and a construction method for the same. The construction method comprises the following steps of (1) selecting a construction area, (2) adjusting gradient of the construction area, (3) determining a group construction scheme, and (4) planting plants according to the group construction scheme. The invention further provides a riverbank ecological buffering band constructed according to the method. Plants are optimized without a change of an original soil layer structure of the riverbank buffering band, and sewage can be stopped and controlled before entering the river way; resistance of the sewage is increased when the sewage flows through the buffering band, working time of the sewage between the buffering band and plant roots and the soil micro-bial community can be increased; pollutants can be removed; water and soil loss can be reduced; load of pollutants flowing into the river can be reduced; and land resources can be conserved and environment can be beautified.

The invention provides a system and a method for gasification melting of household refuse and treatment of household refuse leachate. The system comprises a household refuse pretreatment system, a refuse energy recovering system and a refuse leachate concentration and flue gas treatment system, wherein the household refuse pretreatment system comprises a household refuse stock bin, a household refuse crusher, a household refuse sieving machine and a household refuse extrusion dehydrator which are sequentially connected; the refuse energy recovering system comprises a fluidized-bed gasifier, a cyclone melting furnace, a waste heat boiler and an air-supplying and oxygen-enriching system matched with the fluidized-bed gasifier, the cyclone melting furnace and the waste heat boiler; the refuse leachate concentration and flue gas treatment system comprises a leachate concentrating system, a flue gas purifying device and a wastewater treatment device. According to the system, the heat value of the refuge is increased by a pretreatment process; an oxygen-enriching gasifier and a high-temperature cyclone melting furnace technology are used as a recovering system of refuge energy; the refuge leachate is concentrated by using medium-temperature flue gas exhausted by the waste heat boiler; the concentrated leachate is sprayed into the high-temperature cyclone furnace for harmless treatment.

The invention discloses a method for processing low-content non-ferrous metal materials to extract non-ferrous metals: (1) pretreatment: processing the low-content non-ferrous metal materials into powder materials with a water content not higher than 10% and a particle size of -60 mesh; ( 2) Preheating: Preheat the mixture of reducing agent and chlorinating agent and low-content non-ferrous metal materials to 500-800°C respectively; (3) High-temperature chlorination roasting: add to the preheated low-content non-ferrous metal materials 0~6wt% reducing agent and 4~10wt% chlorinating agent, carry out the chlorination roasting of valuable metals; roasting temperature 800~1100 ℃, roasting time 30~60min; (4) Valuable metal chloride capture recovery: chlorine After the high-temperature flue gas from chemical roasting is collected to remove mineral dust, it is cooled and wet-type collected to recover valuable metal chlorides. The economical and efficient extraction of valuable metals in low-content nonferrous metal materials is realized.

The invention discloses a composite polypropylene microporous membrane, and a preparation method and application thereof, and provides a device for preparing the composite polypropylene microporous membrane. According to the preparation method, a coating layer is introduced to the surface of one side or both sides of a membrane slice by a coating system during preparation of a biaxially oriented polypropylene microporous membrane, and the coating layer is stretched in both longitudinal and transverse directions or only in the transverse direction to achieve the preparation of the composite polypropylene microporous membrane. The method simplifies the production process of the composite polypropylene microporous membrane and improves the performance of the polypropylene microporous membrane. The composite polypropylene microporous membrane is used in a lithium battery, and since the coating layer is a polymer or a composition capable of forming a gel with an electrolyte, the cycle and safety performance of the lithium battery can be improved. The composite polypropylene microporous membrane is used for gas separation, and separation and enrichment of different gases can be achieveddue to different permeability coefficients of the coating layer to different gases.

The invention discloses an ultrasonic remediating method for heavy metal polluted soil / slurry, which comprises the following steps of: performing ultrasonic cavatition on the slurry so as to scatter soil aggregates and resolve heavy metals combined with soil particles into pore water; after ultrasonic effect is stopped, adsorbing nearly all the heavy metals on the fine particles according to the characteristic that the competitive adsorption capacity of the fine particles is stronger than that of coarse particles; and separating the coarse and fine particles with a vibration sieve so as to obtain clean coarse particles and heavy metal-enriched fine particles, wherein the coarse particles after being simply dehydrated can be used as soil materials; and the fine particles after being subjected to slurry-water separation treatment and then solidification / stabilization treatment can be safely used and sanitarily landfilled. The method is high in treatment efficiency, can treat the soil / slurry by adopting a continuous operation way, and is low in treatment cost. The obtained coarse particle material has good engineering properties; and the obtained a few of fine particle materials containing a large amount of heavy metals can be effectively treated and controlled in pollution by adopting a solidification method.

The invention discloses a method for extracting and purifying spittle DNA, which comprises the following: 1) a step of pre-treatment, which is to contact the spittle with pretreatment lysis solution, remove solid matters adhered onto cells and obtain coarse lysis solution; 2) a step of nucleic acid absorption, which is to mix the coarse lysis solution obtained by the step 1) with lysis binding solution and magnetic bead suspension to form a solution system containing magnetic nano microsphere and DNA composite and is to collect the magnetic nano microsphere and DNA composite from the solutionsystem; and 3) a step of washing, which is to wash the magnetic nano microsphere and DNA composite obtained by the step 2) with washing liquid I and washing liquid II in turn, and dissolve out DNA byusing eluent. When the method provided by the invention is used, the DNA extraction efficiency may reach 90 percent, the extracted DNA can be used in short tandem repeat (STR) composite amplification, DNA sequencing, DNA quantification and other downstream analysis and operation.

The invention provides a method and system for video enrichment. The method comprises the steps that modeling analysis is carried out on each frame of image in an original video image, and the regional positions of a foreground and background are judged; a binary image is built; each object in the foreground is tracked to obtain an event body; the event body and event body information are stored in a foreground image database; the event body stored in the event body database is divided into event pieces according to preset time intervals, and feature information of the event pieces is obtained; cluster classification is carried out on the event pieces; video enrichment display is carried out; background images are sampled. According to the method and system for video enrichment, event bodies are extracted from a monitoring video automatically, classification and searching are carried out automatically for enrichment display, and therefore video enrichment is achieved, storage space and time needed for watching the video are saved, similar event bodies can be quickly searched out, and browsing and storage of monitoring videos are greatly facilitated.

The invention provides a method for purifying and recycling high arsenic polluted acid wastewater. A main technique process comprises steps: filtering polluted acid, performing acid concentrating by membrane distillation and recycling condensed water, performing reduction on the concentrated acid, and then cooling to separate out arsenic trioxide, then sulfidizing to perform deep arsenic and heavy metal removing, and finally, removing fluorine and chlorine by ion exchange to obtain acid with low impurity and recycling for a system. The processing method effectively combines a traditional distillation technology and a membrane technology and can realize high quality recycle of purified water without affecting a smoke washing effect. The concentrated acid subjected to membrane distillation is subjected to efficient sulfidizing and then subjected to fluorine and chloride removing by ion exchange, thus providing guarantee for recycle of the concentrated acid. Enriching and concentrating of arsenic can be realized, the arsenic is reduced by a reducing agent, liquid is cooled and crystallized after reducing, 60 percent to 70 percent of arsenic is finally removed in a form of As2O3 from the polluted acid, the effective opening of the arsenic in a smelting system is realized, dosage of a subsequent sulfidizing or neutralizing agent can be greatly reduced, operation cost is reduced, an arsenic filter cake and waste residue are reduced, and secondary pollution risk to the environment is reduced.

The invention discloses a method for extracting purified DNA from human exfoliative cells. The method comprises the following steps: 1) pretreating: contacting the human exfoliative cells with pretreating lysate to remove the solid matters adhering to the biological cells to obtain coarse lysate; 2) nucleic acid adsorbing: mixing the coarse lysate obtained in the step 1) with lysis integrated liquid and magnetic bead suspension to form a solution system containing a magnetic nano microsphere-DNA compound and collecting the magnetic nano microsphere-DNA compound in the solution system; and 3) washing: washing the magnetic nano microsphere-DNA compound obtained in the step 2) with washing liquid I and washing liquid II respectively and then dissolving out the DNA with eluent. The efficiency of extracting DNA by the method can reach 90% and the extracted DNA can be applied to such downstream analysis operations as STR (short tandem repeat) multiplex amplification, DNA sequencing, DNA quantifying and the like.

The invention belongs to the field of antimony smelting arsenic alkali residue treatment and particularly discloses a wet-method recycling and harmless treatment process for antimony smelting arsenicalkali residue. The process adopts a whole-wet-method treatment process and mainly comprises the eight working procedures of breaking, dissolving for leaching, oxidation for antimony outlet, purification for impurity removing, transition for crystallizing, reduction for arsenic sinking, evaporative crystallization and secondary residue harmless treatment. Recycling and harmless treatment of the arsenic alkali residue, zero emission of waste residue and waste water and up-to-standard discharge of exhaust gas are thoroughly achieved, the long-term plagued arsenic alkali residue environmental pollution problem in the antimony smelting industry in China is thoroughly solved, and the environmental risk caused by stacking the arsenic alkali residue is eliminated; and meanwhile, separation, enrichment and effective recovering of valuable elements are achieved.

The invention discloses a single-stage whole process autotrophic denitrification sewage treatment device and a technique thereof. The device comprises a reactor, a water outlet pump, a stirrer, a separation membrane component and an aeration membrane component, wherein the separation membrane component is arranged at the central part inside the reactor; the aeration membrane component consists ofa membrane tube which is wound on the inner wall of the reactor; and an air inlet pipe is connected with the aeration membrane component, and a water inlet of a water outlet pump is connected with theseparation membrane component by a pipeline. The method mainly comprises: the dissolved oxygen is controlled to be about 0.5-1.0mg / L, and partial short-cut nitrification is carried out on ammonia nitrogen under the action of ammonia-oxidizing bacteria; and then, aeration is stopped, denitrification is completed by anaerobic ammonium oxidation, and clean outlet water can be obtained by membrane separation. The invention leads the aeration membrane and the separation membrane to be arranged inside the same reactor to form a membrane aeration separating reactor, thus coupling bubble-free aeration, membrane separation and biological degradation. By utilizing the characteristics of high efficiency and easy control of membrane aeration, the good short-cut nitrification of nitrogenous effluent can be realized.

The invention belongs to the technical field of chemical wastewater treatment, and in particular relates to a white carbon black production wastewater treatment technology. The technology comprises the steps of pretreating white carbon black production wastewater so that the water quality of the treated wastewater can reach the water quality requirement of a membrane treatment system; carrying out membrane filtration so that enriching sodium sulfate in the wastewater is enriched at one side of a membrane until the content of sodium sulfate is not less than 10% and the produced water at the other side reaches a recycle water index and is recycled to a production system for reuse; carrying out freezing crystallization on the thick water to separate out mirabilite, separating out the crystallization mother liquor so as to obtain the mirabilite and returning the crystallization mother liquor back to a membrane concentration system, and thermally dehydrating the mirabilite so as to obtain anhydrous sodium sulphate which is not less than 98% and used for selling; or evaporating and crystallizing the thick water with the sodium sulfate being not less than 10% through directly utilizing an evaporator so as to separate out the anhydrous sodium sulphate. The water source recycling and chemical raw material recovery are realized through low energy consumption. Through cooperatively using two technologies, the energy consumption for treating each tonnage of wastewater can be greatly reduced, and the water recovery rate of a whole treatment system is not less than 92%; the sodium sulfate content of an anhydrous sodium sulphate product is not less than 98%.

The invention relates to a method for preparing a thioamide-based chelating nanofiber for adsorbing heavy metal ions by combining an electrostatic spinning technology with a chemical grafting technology. The method comprises the following steps of: preparing a nanofiber from polyacrylonitrile which has high chemical stability, is easily subjected to electrospinning and is taken as an initiative raw material of reaction by the electrostatic spinning technology, pre-crosslinking, and performing thioamidation to prepare the chelating nanofiber for adsorbing the heavy metal ions. The fiber membrane of the prepared chelating nanofiber has good appearance, uniform diameter, high mechanical property, heat stability and solvent resistance, and high property of adsorbing the heavy metal ions such as gold, silver, lead, mercury, palladium, cadmium and the like. By the technology, the preparation process is simple, production equipment is low-cost, and the chelating nanofiber has low requirement on production conditions, and high properties, so the chelating nanofiber has high practical value, the content of the heavy metal ions which are produced due to industrial development and harm human health is reduced, and the chelating nanofiber has a wide application prospect for solving the livelihood problem.

The invention relates to a waste incineration fly ash sintering reduction treatment technique which is especially applicable to treatment and disposition of waste incineration fly ash of which the salt content is lower than 20%. The fly ash is added with a dechloridation fusing assistant to intensify the volatilization of heavy metals and the decomposition of dioxin, heavy metals and chlorine salt are intensively concentrated in secondary fly ash within a relatively low temperature range, and then the secondary fly ash is washed by water so as to further realize concentration of pollutants and reduction of the fly ash. The water-washed fly ash is returned to a rapid sintering device so as to completely degrade dioxin type pollutants; water-washing liquid is evaporated and concentrated to recycle the salt by using the afterheat of a sintering system, the concentrated liquid and mud obtained by evaporation and the obtained sintered body are safely buried or recycled. The treatment technique disclosed by the invention is relatively simple in overall process and equipment, the energy consumption and the treatment cost are relatively low, the environmental friendliness of the obtained end product is improved, and the long-term potential impacts of the fly ash on the environment are minimized.

The invention discloses a micro plastic separation, enrichment and concentration device comprising an air pump, an aeration branch pipe, a separator, a screen net, a connector, an inlet branch pipe, an overflowing branch pipe and a storage groove. One end of the aeration branch pipe is connected with the air pump, and the other end of the aeration branch pipe communicates with the interior of theseparator. One end of the overflowing branch pipe is connected with an overflowing outlet in the upper portion of the separator, the other end of the overflowing branch pipe communicates with the storage groove, and the screen net is fixed above the storage groove through the overflowing branch pipe. One end of the inlet branch pipe is connected with an inlet in the lower portion of the separator,and the other end of the inlet branch pipe communicates with the interior of the storage groove. The micro plastic continuous separation and enrichment device is simple in structure, a separation method is efficient, convenient and fast and stable in operation, the recycling efficiency of micro plastic is improved, and continuous flotation, automatic separation and concentration and enrichment ofsediment and the micro plastic in soil are realized.

The invention discloses a tobacco stalk biochar soil conditioner capable of reducing the content of heavy metals in tobacco, improving the tobacco quality and improving the soil environment, as well as an improvement method for tobacco field soil. The tobacco stalk biochar soil conditioner is prepared by mixing the following raw materials in parts by weight: 40-60 parts of tobacco stalk biochar and 40-60 g of a passivant. The tobacco stalk biochar soil conditioner is easy to obtain raw materials, simple in preparation method and low in cost, can effectively reduce the content of heavy metals in tobacco, and can improve the quality of tobacco field soil; a large number of waste tobacco stalks generated in tobacco growing areas are adopted as the raw material, the resource recycling of waste materials is realized, the sustainable development of the tobacco industry is facilitated, and the tobacco stalk biochar soil conditioner is suitable for large-scale popularization and application in the field of tobacco growing.

The invention relates to a method for mixed production of light-weight aromatic hydrocarbon by use of catalytic cracking diesel and C10<+> distillate oil. The method comprises the following steps: firstly mixing the catalytic cracking diesel and the C10<+> distillate oil with hydrogen, performing a hydrofining reaction to remove sulfur and nitrogen, saturate olefin and appropriately saturate aromatic hydrocarbon; then, extracting a hydrofining product by using an extraction solvent to obtain extract oil containing rich aromatic hydrocarbon and raffinate oil containing rich alkane; using the raffinate oil as a clean diesel oil concoction component, and performing rectification separation on the extract oil to obtain aromatic hydrocarbon extract oil; performing a hydrocracking reaction on the aromatic hydrocarbon extract oil, performing cutting separation on a hydrocracking product, using a distillate oil product greater than 195 DEG C as the clean diesel oil concoction component, feeding the distillate oil product smaller than 195 DEG C as an aromatic hydrocarbon raw material into an aromatic hydrocarbon treatment device to obtain a light-weight aromatic hydrocarbon product and a clean gasoline concoction component. By adopting the method provided by the invention, the yield of the light-weight aromatic hydrocarbon is increased, and meanwhile high-quality clean fuel oil is obtained and the high additional value utilization of the C10<+> distillate oil is achieved.

The invention belongs to the technical field of detection and relates to a pretreatment method for biogen amine neurotransmitter and / or metabolites thereof. The method comprises the following steps of: performing derivatization on a sample containing the biogen amine neurotransmitter and / or the metabolites thereof, and carrying out online solid-phase extraction on derivatization products. On the basis, the invention also relates to a detection method for the biogen amine neurotransmitter and / or the metabolites thereof, a detection kit and application thereof. The pretreatment method has the advantages that impurities in the derivatization products can be eliminated, and after being enriched, the derivatization products with proper concentration are transferred into the following detection steps. The detection method has the advantages that the content of the biogen amine neurotransmitter and / or the metabolites thereof in a biological sample can be fast and accurately measured, and the detection sensitivity is high.

The present invention belongs to the technical field of air purification, and particularly relates to a graphene oxide / titanium dioxide-active carbon three-dimensional composite material and a preparation method thereof, wherein a graphene oxide / titanium dioxide composite material is directly and densely adhered onto the surface of an active carbon filtration screen or a carbon fiber net so as to obtain the three-dimensional composite material. According to the present invention, the graphene oxide / titanium dioxide-active carbon three-dimensional composite material can provide excellent adsorption performance and excellent photocatalytic degradation performance on formaldehyde, wherein photocatalytic degradation is performed after formaldehyde is adsorbed, such that the actual removal of the formaldehyde can be achieved, and the secondary pollution caused by the desorption of the formaldehyde can be prevented; and after the adsorption degradation treatment is performed with the composite material of the present invention, the removal rate of the low concentration formaldehyde (concentration of 1.0 mg / m<3>) in the home within 10 h is up to 82.5-95.6%.