612 results about "Polycyclic aromatic hydrocarbon" patented technology

The invention provides a photosensitive resin composition containing a photobleaching aminomethyl anthracene photosensitizer and application thereof.The structural main body anthracene ring of the photosensitizer introduces an aminomethyl functional group to the 9th and / or 10th site: through introduction of the aminomethyl functional group, while the electron cloud density of polycyclic aromatic hydrocarbon is maintained, the maximum absorption wavelength is subjected to red shift, and the photosensitive resin composition is especially suitable for a 405nm illumination system; the initiation efficiency is obviously improved; the exposure energy is reduced; compared with an existing DBA type photoinitiator, the problem of alkoxy carbon-oxygen bond breakage caused by p-pi conjugation of DBA is avoided, generation of small molecule fragments is effectively inhibited, defects are reduced, and the yield is increased. In addition, compared with DPHA and DAcOA, the photosensitizer also shows better solubility and formula compatibility. The preparation method has the characteristics of simple preparation process and low cost, and can be widely applied to the photocuring fields of dry films, paints, coatings, printing inks, forming materials and the like.

The invention relates to the technical field of environmental restoration, in particular to a slow-release material for synergistically restoring heavy metal and organic compound contaminated soil based on modified biochar and microorganisms and an application method thereof.The slow-release material is prepared from, by weight, 50-80 parts of modified biochar, 30-40 parts of sodium alginate, 10-20 parts of gelatin, 5-10 parts of glycerin and 3-5 parts of calcium carbonate. The multi-modified biochar is prepared from, by weight, 300-400 parts of a functional flora mixed solution and 5-10 parts of mixed nutrient elements of glucose, yeast extract and KHPO, and through the synergistic effect of the multi-modified biochar and the functional flora, efficient immobilization (the immobilization rate gt is 60%) of heavy metal (lead, cadmium and chromium) and efficient degradation (the degradation rate gt is 70%) of organic pollutants (polycyclic aromatic hydrocarbon and petroleum hydrocarbon) are achieved.

The invention belongs to the technical field of asphalt pavement repairing, and particularly relates to a local repairing technology of an asphalt pavement, which comprises the following specific contents: detecting a disease range by adopting ground three-dimensional laser scanning or ground penetrating radar, determining a repairing boundary, sampling and detecting the aging degree, the moisture content and the grading type of the asphalt of the original pavement, and determining the repairing quality of the asphalt pavement. According to the method, the bonding strength of the repairing material and the asphalt layer of the original pavement is enhanced by heating and activating the interface of the original pavement and emulsifying the asphalt bonding layer, and matching the repairing material with the shrinkage coefficient of the original pavement and reinforcing and compacting the edge, so that the condition that the repaired position is cracked, loosened and damaged in a short time is avoided; warm-mixed asphalt is adopted, the heating temperature is reduced by 40-60 DEG C, cold-mixed emulsified asphalt is popularized, and the asphalt does not need to be heated, so that release of a large amount of volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs) and dust is effectively avoided, and air pollution is avoided.

The invention relates to a petroleum polluted soil polycyclic aromatic hydrocarbon migration path simulation experiment system, which comprises a main reaction cabin, a mechanical arm collaborative operation module, a multi-mode sensing module, a whole natural environment regulation and control module and an edge intelligent decision-making platform, an annular magnetic suspension track is arranged at the top of the main reaction cabin, and a soil sample chamber is arranged at the bottom of the main reaction cabin; the multi-modal sensing module comprises an EIT (electrical impedance tomography) module, an LIBS (laser-induced breakdown spectroscopy) module and a terahertz time-domain spectroscopy module and is used for measuring global conductivity distribution of soil in a soil sample chamber, inverting the porosity of the soil sample and a pollutant concentration field in pore water, analyzing the concentration of carbon, hydrogen and oxygen elements of pollutants and specifically detecting polycyclic aromatic hydrocarbon molecules; the edge intelligent decision-making platform interacts with the multi-mode sensing module, the full-natural-environment regulation and control module and the mechanical arm collaborative operation module to actively adjust system parameters, and repair intervention is carried out on soil body degradation. And automatic preparation of the polluted soil can be realized, and migration monitoring under different practical engineering application working conditions can be realized.

The invention discloses a Raman spectrum joint classification and quantification method based on a prior fusion double-flow network, and belongs to the technical field of spectral analysis and chemometrics. The method comprises the following steps: acquiring Raman spectrum original data, and preprocessing to obtain standardized spectrum data; raman spectrum prior information is extracted, and a prior information double-flow network containing classification and quantitative flow sub-networks is constructed; standardized data and prior information are input, classification preheating-combined fine tuning training is adopted, conflict is relieved by combining dynamic weighting and PCGrad, and samples are expanded through a physical consistency strategy synchronously; processing unknown samples by using the trained network, and outputting categories and component contents; according to the method, weak peak information is mined through double-flow architecture and cross-flow attention, derivative noise is suppressed, classification-quantification performance is balanced through double-task optimization, and small sample overfitting is solved through physical expansion; on a polycyclic aromatic hydrocarbon data set, classification and regression indexes are superior to those of a traditional method, the low-concentration / weak-peak scene precision and robustness are better, and the engineering application prospect is good.

The invention discloses a method for preparing humic acid by graded oxidation and depolymerization of lignite, which comprises the following steps: weighing lignite, adding hydrogen peroxide for oxidation pretreatment, filtering and vacuum drying to obtain primarily oxidized lignite named as PTSL; and carrying out a deep oxidation experiment on the obtained PTSL by using a mixed gas of ozone and oxygen, after the oxidation reaction is finished, carrying out centrifugal filtration on the mixture, and collecting a liquid sample. The lignite is subjected to gradient oxidation depolymerization in a graded oxidation mode, the green oxidant hydrogen peroxide firstly oxidizes and breaks weak bridge bonds and side chain structures in the lignite without damaging aromatic ring structures, then the lignite is further deeply oxidized through the strong oxidant ozone, polycyclic aromatic hydrocarbon structures in the lignite are gradually damaged, and the content of the polycyclic aromatic hydrocarbon in the lignite is reduced. The step-by-step oxidative depolymerization of the organic matters in the coal is realized. According to the method, the organic matter conversion rate and the humic acid yield of the lignite can be improved, and the impurity content in the humic acid is reduced.

The invention discloses a Pseudomonas nicosulfurones bacterial strain and an application of the Pseudomonas nicosulfurones bacterial strain in degradation of phenanthrene and benzopyrene. According to the invention, a degradation strain Pseudomonas nicosulfurensis DY-8, which takes phenanthrene and benzopyrene as carbon sources, is obtained by domestication, separation and identification from petroleum-polluted soil in Ningbo. The invention also relates to a method for preparing the degradation strain Pseudomonas nicosulfurensis DY-8 with phenanthrene and benzopyrene as carbon sources. The DY-8 can utilize phenanthrene and benzopyrene as carbon sources, and after the DY-8 is cultured in an inorganic salt culture solution with the initial concentration of phenanthrene and benzopyrene being 50 mg.L <-1 > and 25 mg.L <-1 > respectively for 7 days, the degradation rates of phenanthrene and benzopyrene can reach 70% or above. Therefore, the strain has good application potential in the aspect of bioremediation of polycyclic aromatic hydrocarbon.

The invention discloses a long-afterglow material based on waste PET and a preparation method and application thereof.Organic luminescent substance crown alkene serves as luminescent molecules and is fused and doped into recycled waste PET, the waste PET is upgraded and reconstructed into a persistent luminescent polymer element, PET macromolecular chains are folded front and back to form regular lamellas, and the lamellas are uniformly distributed on the surface of the waste PET, so that the long-afterglow material based on the waste PET is obtained. Excitons are stabilized, and oxygen in the atmosphere is prevented from being quenched. Due to the planar and rigid structure of the polycyclic aromatic hydrocarbon, intramolecular movement can be inhibited, so that non-radiative decay channels are reduced, and the ultra-long afterglow effect is realized. According to the long-afterglow material, pollution of waste materials is reduced, upgrading and recycling of resources are achieved, upgrading and recycling steps are simple and convenient, cost is low, the preparation process is easy to scale, economical and efficient, and the long-afterglow material has good industrial popularization prospects and has important application value in the technical field of plastic upgrading and recycling.

The invention provides a red light and infrared light-emitting compound based on a boron-nitrogen fused ring and application thereof. The invention provides a boron-nitrogen polycyclic aromatic hydrocarbon material of a fused naphthalene ring, and a specific strong electron withdrawing group is introduced to a boron atom para-position. Compared with a compound disclosed in the prior art, the compound provided by the invention introduces a strong electron withdrawing group to a boron atom para-position of boron-nitrogen polycyclic aromatic hydrocarbon of a fused naphthalene ring, so that the emission spectrum of the material can be subjected to significant red shift (red shift from a yellow light band to a red light band and even an infrared band), and red light and even infrared light emission with high luminous efficiency and a narrow band can be realized. An electroluminescent device prepared from the compound provided by the invention shows relatively high luminescent color purity and relatively excellent luminous efficiency, and can meet the requirements of current enterprise production on high-performance luminescent materials.

A preparation method of high-conductivity carbon fiber paper comprises the following steps: performing surface oxidation modification, washing, filtering and drying on carbon fibers, adding the carbon fibers into an aqueous solution of a dispersing agent, forming through a papermaking process to obtain carbon fiber pre-formed paper, impregnating the carbon fiber pre-formed paper into a resin solution, and drying to obtain the high-conductivity carbon fiber paper. And carrying out hot-pressing curing and high-temperature treatment to obtain the carbon fiber paper. Asphalt resin and phenolic resin are used as binders, in the hot-pressing curing stage, the asphalt resin is heated and melted, carbon fibers are uniformly impregnated, a three-dimensional network structure formed by curing and crosslinking of the phenolic resin is fully filled, and a good conductive network is formed; in the high-temperature treatment stage, the asphalt resin and the phenolic resin are co-carbonized, a polycyclic aromatic hydrocarbon structure of the asphalt resin is combined with free radicals generated by pyrolysis of the phenolic resin to generate dehydrogenation reaction, a wider conjugated carbon network is formed, the graphitization degree of the carbon paper is improved, and the conductivity and mechanical strength of the carbon paper are improved; therefore, the composite membrane has a good effect in the proton exchange membrane fuel cell.

The invention relates to a nitrogen-containing bowl-shaped conjugated pH-responsive fluorescent probe and a preparation method and application thereof, the nitrogen-containing bowl-shaped conjugated pH-responsive fluorescent probe is characterized in that the structural formula of the nitrogen-containing bowl-shaped conjugated pH-responsive fluorescent probe is # imgabs0 #, and R is hydrogen, acetyl or p-toluenesulfonyl. Compared with the prior art, the nitrogen-containing bowl-shaped conjugated molecule provided by the invention shows a highly sensitive response characteristic in an acid-base medium. Due to the introduction of nitrogen atoms, the electronic structure of molecules is obviously changed, lone pair electrons of the nitrogen atoms can participate in the reaction, and the protonation behavior is obvious under the acidic condition. After protonation, the fluorescence intensity of the molecule is obviously enhanced, and the emission wavelength has obvious red shift, so that the probe has important application value in the aspect of developing a high-sensitivity acid-base sensor. In addition, the nitrogen-containing polycyclic aromatic hydrocarbon compound also shows application prospects in the fields of organic light-emitting diodes, information safety, biological imaging and the like.

The invention discloses a hydroxyl polycyclic aromatic hydrocarbon Raman spectrum detection method based on a dynamic weighted voting fusion network, relates to the technical field of hydroxyl polycyclic aromatic hydrocarbon detection, and provides an effective method which is rapid, accurate and free of chromatographic separation. Spectral information of OH-PAHs is obtained by using surface enhanced Raman spectroscopy SERS, and a Raman spectrum is obtained through density functional theory DFT calculation. A dynamic weighted voting fusion network DWVF-Net model is constructed, wherein the model comprises two core parts of cross-modal attention fusion (CMAF) and dynamic weighted voting (DWV). The CMAF dynamically weights key areas of SERS and DFT Raman spectrums through cosine similarity to realize feature fusion; and the DWV adaptively adjusts the weight of the model according to the real-time performance of the model, and optimizes an integration decision. Through the synergistic effect of CMAF and DWV, complementary information of SERS and DFT Raman spectrums is effectively fused, and the adaptability advantage of a dynamic weighting mechanism in the aspect of processing a complex data environment is verified.

The invention relates to the technical field of water treatment, in particular to a method for treating degradation-resistant organic pollution underground water based on a micro-interface strengthening technology. According to the technical scheme, the method comprises the steps that an underground water sample is collected and subjected to pollution characteristic analysis, composite material slurry is injected into a water-containing layer to construct an interface-enhanced in-situ reaction system, and the slurry is composed of nanoscale iron-based metal particles, graphene oxide derivatives, modified biochar, a surfactant and the like; meanwhile, a low-pressure gas injection system is arranged to form a micro-aerobic environment so as to improve the interface reaction efficiency, dominant microbial communities are synchronously injected, a slow-release carbon source carrier is added so as to strengthen the biological synergistic degradation effect, and the operation state of the system is regulated and controlled through multi-parameter monitoring. According to the method, a micro-interface synergistic system integrating physical adsorption, chemical reduction and biological metabolism is constructed, refractory organic pollutants such as aryl halide and polycyclic aromatic hydrocarbon in underground water can be efficiently and stably removed, and the method has the advantages of being high in remediation efficiency, high in operation stability and wide in environmental adaptability.

The invention relates to an aza-polycyclic aromatic hydrocarbon organic ligand and a preparation method thereof, an aza-polycyclic aromatic hydrocarbon assembled molecular cage and a preparation method and application thereof, the organic ligand takes dimethyl methylene bridged triphenylamine as a core, a benzene ring is modified by an R group, and the molecular cage is prepared from the organic ligand, the organic ligand and the aza-polycyclic aromatic hydrocarbon. A metal organic caged compound obtained by a coordination reaction with a metal complex; the molecular cage is of a truncated tetrahedral structure of twelve metals and eight ligands; each organic ligand is provided with three equal side arms which are wrapped and stacked together in a curved surface manner to form a pseudo six-section ligand; the organic ligands and the metal nodes are self-assembled to form a molecular cage with a hydrophobic cavity for recognizing guest molecules in the center. Compared with the prior art, the organic ligand has flexibility and is combined with metal to construct a novel water-soluble metal organic double-wall knotted flexible molecular cage, a size-adjustable cavity exists in the molecular cage, and selective recognition of nucleotide negative electricity biomolecules in a water phase is achieved.

The invention discloses a bacterial strain for reducing dissimilatory nitrate into ammonia nitrogen through anaerobic biodegradation of polycyclic aromatic hydrocarbon and application of the bacterial strain, the bacterial strain is named as PheICNA, and the bacterial strain belongs to Intraporum calvum. The strain is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.40686. The strain can degrade polycyclic aromatic hydrocarbons such as phenanthrene under anaerobic conditions and completely metabolize the polycyclic aromatic hydrocarbons into carbon dioxide. Meanwhile, nitrate radicals are reduced into ammonium nitrogen, and the generated ammonium nitrogen can be used for growth of microorganisms and can be used as a nitrogen source for plants. The strain can be used for biologically repairing polycyclic aromatic hydrocarbon pollutants such as phenanthrene in soil, can convert nitrate nitrogen in the soil into ammoniacal nitrogen at the same time, achieves the effect of nitrogen maintenance, and has good application prospects in the aspects of polluted soil treatment and the like.

The invention discloses a residual oil hydrogenation carbon residue removal catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, the carrier is aluminum oxide containing silicon and gallium; on the basis of the weight of the catalyst, the mass content of the carrier is 74%-83%, the content of the group VIII metal in terms of oxide is 2%-6%, and the content of molybdenum in terms of oxide is 15%-24%; the active metal component comprises Mo and a group VIII metal element; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The catalyst has good hydrogenation carbon residue removal performance, can deeply remove polycyclic aromatic hydrocarbon and heterocyclic aromatic hydrocarbon in residual oil and reduce precursors of carbon residues, and has good stability.

The invention belongs to the technical field of cigarette filtration, and relates to a preparation method and application of a biomass-based supramolecular assembly functional material. According to the method, a large number of plant-based fibers existing in the nature serve as a substrate material, gallic acid and ellagic acid with small molecular sizes are adopted to be matched with tannic acid with large molecular sizes to be coordinated with metal ions, tannic acid molecules can be separated, crowding of the tannic acid molecules is relieved, the utilization rate of hydroxyl on the tannic acid molecules is increased, and the yield of the tannic acid is increased. The molecular assembly efficiency is improved. A metal-polyphenol network functional film is generated on the surface of the plant-based fiber material based on the polyphenol regulated supramolecular assembly structure, and the prepared material can effectively remove tar substances, especially polycyclic aromatic hydrocarbon strong cancerogenic substances, in cigarette smoke, so that harmful ingredients inhaled by smokers are reduced, meanwhile, the smoking experience feeling is not affected, and the cigarette quality is improved. The palatability of the filter tip is improved, and the filter tip has better application value and market prospect in the technical field of cigarette filtration.

The invention belongs to the field of functional porous materials, and particularly relates to novel N, S polycyclic aromatic hydrocarbon molecules and preparation thereof, preparation of porous organic porous polymer gel constructed by using the polycyclic aromatic hydrocarbon molecules and application of the porous organic porous polymer gel in photocatalytic water oxidation to generate hydrogen peroxide. The invention provides an N, S polycyclic aromatic hydrocarbon molecule which has a structural formula as shown in a formula I. The invention provides a novel N, S polycyclic aromatic hydrocarbon molecule and a synthesis method thereof. The porous organic polymer gel is synthesized by taking the porous organic polymer as a construction unit, and the synthesized gel has excellent processability and photoelectric activity, so that the gel shows an excellent rate of preparing hydrogen peroxide through photocatalytic water oxidation when being used as a photocatalytic material.

The invention discloses a bacterium DY-11 for degrading phenanthrene and benzopyrene in petroleum-contaminated soil and application of the bacterium DY-11. The bacterial strain is Achromobacter expander DY-11, and the preservation number of the bacterial strain is GDMCC No: 66005. Experiments prove that the strain DY-11 can respectively utilize phenanthrene and benzopyrene as carbon sources to degrade phenanthrene and benzopyrene, and after the strain DY-11 is cultured in inorganic salt culture solutions with the initial concentration of phenanthrene and benzopyrene being 50 mg.L <-1 > and 25 mg.L <-1 > respectively for 7 days, the degradation rates of phenanthrene and benzopyrene can reach 65% or above. Therefore, the DY-11 is a strain which can degrade phenanthrene and benzopyrene and has very strong tolerance to phenanthrene and benzopyrene, has strong adaptability to polycyclic aromatic hydrocarbons, and has better application potential in the aspect of bioremediation.

The invention discloses a preparation method of recombinant catechol-2, 3-dioxygenase and an application of the recombinant catechol-2, 3-dioxygenase. According to the invention, a novel catechol-2, 3-dioxygenase group C23O927 is identified from a constructed metagenome library, and the catechol-2, 3-dioxygenase group C23O927 is a key enzyme for catalyzing degradation of polycyclic aromatic hydrocarbon pollutants. A C23O927-pET32a (+) recombinant expression vector is constructed and converted into host bacteria, heterologous expression of target protein is achieved, and the prepared recombinase belongs to acid enzymes and has good resistance to high temperature, acid, alkali, high-concentration metal ions, organic solvents and surfactants. The recombinase provided by the invention can be used in an acidic environment, has very good enzymatic activity, can catalytically degrade various catechol compounds, can be better used for treating polycyclic aromatic hydrocarbon polluted environments, and has important significance for developing more products which can tolerate various extreme environments and efficiently catalyze degradation of polycyclic aromatic hydrocarbons.

A process for producing a purified carbon black with a reduced content of oxidized polycyclic aromatic hydrocarbons, such as oxy-polycyclic aromatic hydrocarbons (oxy-PAHs) and / or nitro-polycyclic aromatic hydrocarbons (nitro-PAHs) is provided. The process comprises providing a carbon black comprising an initial content of oxidized polycyclic aromatic hydrocarbons, and subjecting the provided carbon black to a thermal treatment comprising heat treating the carbon black at a temperature of less than 280°C in a vacuum or inert gas atmosphere. Also disclosed are purified carbon blacks obtainable by such process, and applications and uses of these purified carbon blacks.

The present invention provides a photosensitive resin composition containing a photo-bleachable aminomethyl anthracene photosensitizer and its applications. An aminomethyl functional group is introduced at the 9- and / or 10-positions of the anthracene ring, which is the main structure of the photosensitizer. By introducing the aminomethyl group, while maintaining the electron cloud density of the polycyclic aromatic hydrocarbon, the maximum absorption wavelength is red-shifted, especially suitable for the 405 nm light irradiation system, significantly improving the initiation efficiency and reducing the exposure energy. Compared with the existing DBA-type photoinitiators, the problem of the cleavage of the alkoxy carbon-oxygen bond caused by p-π conjugation in DBA is avoided, effectively inhibiting the generation of small molecule fragments, reducing defects and improving the yield. Compared with DPHA and DAcOA, this photosensitizer also exhibits better solubility and formulation compatibility. The present invention has the characteristics of simple preparation process and low cost, and can be widely applied to the field of photocuring such as dry films, paints, coatings, inks and molding materials.

The invention discloses a carbon-based polycyclic aromatic hydrocarbon adsorbent and a preparation method and application thereof.The preparation method comprises the steps that firstly, a mixture of a pretreated coconut shell material and a modifier is subjected to high-temperature treatment to obtain a carbonized material, then the carbonized material is immersed in an activating solution to be subjected to low-temperature treatment, and then filtering, washing to be neutral and drying in the shade at the room temperature are conducted to obtain the carbon-based polycyclic aromatic hydrocarbon adsorbent. Carrying out secondary high-temperature treatment to obtain an activated material; and crushing and sieving the activated material to obtain the carbon-based polycyclic aromatic hydrocarbon adsorbent. The carbon-based polycyclic aromatic hydrocarbon adsorbent has obvious advantages in the selective adsorption and removal process of polycyclic aromatic hydrocarbon, silicon species are introduced in the carbonization process, a microporous structure in a carbon material is destroyed in a pillared mode, then the pore structure of the catalyst is regulated and controlled, the mesoporous structure is richer, and the adsorption selectivity of the polycyclic aromatic hydrocarbon is improved; the adsorbent has high adsorption capacity and adsorption selectivity.

The invention provides haematococcus alternatus and application thereof. The classification of the haematococcus alternatus is named as Alterrythrobacter sp. H2, and the classification of the haematococcus alternatus is named as Alterrythrobacter sp. The preservation unit is China General Microbiological Culture Collection Center (CGMCC); the address is Institute of Microbiology, Chinese Academy of Sciences, No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing; the preservation date is July 29, 2024, and the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.31487. The alternated red bacillus provided by the invention can degrade various polycyclic aromatic hydrocarbons under various environmental conditions of high salt, high temperature, low temperature, acidity, alkalinity, chromium combined pollution, arsenic combined pollution and the like.

The invention provides a full-automatic online detection method for trace polycyclic aromatic hydrocarbon derivatives (SPAHs) in water, which comprises the following steps: (1) pretreatment: standing a water sample, centrifugally filtering to remove suspended matters, adding a prepared mixed standard solution, and directly loading on a machine; (2) enrichment and separation: adopting a Turbo flow C18-XL on-line solid phase extraction column to realize automatic enrichment and matrix purification of the 15 SPAHs, and combining an ultra-high performance liquid chromatography gradient elution program (methanol-ultrapure water system) to realize efficient enrichment and separation; and (3) detection and analysis: performing Full MS-ddMS2 scanning in an APCI (Amplified Peripheral Component Interconnect) source-Orbitrap high-resolution mass spectrum positive and negative ion switching mode to realize synchronous detection of hydroxyl, nitro and oxygen-containing SPAHs. According to the method, a unified detection system covering six hydroxyl polycyclic aromatic hydrocarbons, six oxygen-containing polycyclic aromatic hydrocarbons and three nitro polycyclic aromatic hydrocarbons is constructed for the first time, the detection limit is as low as 0.02 ng / L, and compared with a traditional GC-MS method, the sensitivity is greatly improved, and the sample pretreatment time is greatly shortened. Compared with the prior art, derivatization treatment is not needed, continuous sample injection is achieved through an online solid-phase extraction column regeneration technology, complex matrix interference is effectively eliminated in cooperation with a dynamic elimination function, and a high-sensitivity and high-throughput analysis method is provided for ecological risk assessment of trace SPAHs in underground water and surface water.

The invention relates to a preparation method of electrical-grade magnesium oxide for slowing down current leakage, belongs to the technical field of electrical-grade magnesium oxide, and solves the problems of poor insulativity, relatively high electrical leakage and the like in the actual use process of electrical-grade magnesium oxide. Comprising the following steps: step 1, weighing nano calcium oxide and lanthanide series metal oxide, putting the nano calcium oxide and the lanthanide series metal oxide into a quartz crucible, and uniformly mixing to obtain a primary mixed oxide auxiliary agent; 2, heating the mixed oxide auxiliary agent obtained in the step 1 in a muffle furnace, cooling to room temperature under a drying condition to obtain white powder, and grinding to obtain an oxide auxiliary agent; 3, absorbing ethyl acetate (EA), hydrogen-containing silicone oil and polycyclic aromatic hydrocarbon (D30), putting into a centrifugal tube, and uniformly mixing to obtain a liquid film coating auxiliary agent; the method has the advantages that the current leakage of the electrical-grade magnesium oxide with poor insulativity can be slowed down by adding the metal oxide aid under the condition that the original properties of the electrical-grade magnesium oxide are not changed. The method is simple, convenient and obvious in effect.

The invention relates to the technical field of environmental remediation microorganisms, and discloses acinetobacter B2-4, a culture method thereof and application of the acinetobacter B2-4 in degradation of polycyclic aromatic hydrocarbon. The Acinetobacter sp. B2-4 is preserved in the China General Microbiological Culture Collection Center on March 3, 2025, the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC No.33689. The Acinetobacter sp. B2-4 has the advantages that the Acinetobacter sp. The Acinetobacter sp. B2-4 disclosed by the invention is an anaerobic bacterium, and can utilize nitrate, iron, sulfate and the like to replace an electron acceptor in an anoxic environment to continuously degrade polycyclic aromatic hydrocarbon. After the strain is cultured for 45 days, the degradation rate of phenanthrene reaches 74.9%, and the degradation rate of pyrene reaches 56.2%.

The invention provides a microwave remediation efficiency prediction method for polycyclic aromatic hydrocarbon contaminated soil, and belongs to the field of physical remediation of soil. The method comprises the steps that soil parameters, remediation parameters based on microwave soil remediation and the polycyclic aromatic hydrocarbon removal rate are obtained; based on a data fitting method, determining a corresponding relation between the soil parameter and / or the remediation parameter and the polycyclic aromatic hydrocarbon removal rate; according to the corresponding relation between the soil parameters and / or the remediation parameters and the polycyclic aromatic hydrocarbon removal rate, predicting the polycyclic aromatic hydrocarbon removal rate under the known soil parameters and / or the remediation parameters; according to the method, accurate prediction of the polycyclic aromatic hydrocarbon removal rate of the soil can be realized, and a theoretical basis is provided for optimizing microwave remediation process parameters.

This invention discloses a method for detecting polycyclic aromatic hydrocarbons (PAHs) based on ultraviolet fluorescence and absorption spectroscopy, comprising: Step 1, acquiring the ultraviolet absorption spectrum and the fluorescence emission spectrum of a water sample under ultraviolet light excitation; Step 2, analyzing the corresponding CDOM fluorescence spectrum using the ultraviolet absorption spectrum obtained in Step 1; Step 3, subtracting the CDOM fluorescence spectrum obtained in Step 2 from the fluorescence emission spectrum obtained in Step 1 to obtain a mixed fluorescence spectrum containing multiple PAHs; Step 4, performing multivariate fitting on the mixed fluorescence spectrum obtained in Step 3 to obtain the type and concentration of each PAH in the water sample. This invention also provides a PAH detection device. The method provided by this invention is simple to operate and can directly detect raw water samples, thereby obtaining more accurate PAH detection results.

The invention provides a method for regulating and controlling dynamic kinetic resolution of spiral polycyclic aromatic hydrocarbon based on an inorganic chiral surface and application, and the method comprises the following steps: S1, rotating a substrate clockwise or anticlockwise, and depositing an inorganic material on the substrate by adopting a physical vapor deposition method to obtain an inorganic chiral nano material layer; wherein the contact angle between the inorganic material and N, N-dimethylformamide is less than 22 degrees, and the deposition angle and the normal direction of the substrate form an angle of 86 degrees or 0 degree; s2, dissolving spiral polycyclic aromatic hydrocarbon molecules needing to be split into N, N-dimethylformamide to obtain a solution; then dropwise adding to the surface of the inorganic chiral nano material layer to obtain a sample; and S3, annealing the sample at 40-50 DEG C, and obtaining the homochiral aggregate after the solvent is completely evaporated. The technical scheme provided by the invention is high in controllability, strong in universality and good in stability, and can be used for efficiently preparing chiral compounds with specific configurations.