45 results about "Persistent organic pollutant" patented technology

The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.

The invention relates to the technical field of sewage treatment, in particular to a series multi-stage MABR reaction intelligent water treatment system. Comprising a multi-stage membrane aeration biological membrane reaction unit and a data monitoring and feedback unit, the multi-stage membrane aeration biological membrane reaction unit comprises an MABR (Membrane Aerated Baffled Reactor) membrane assembly, a magnet rod, a pipeline, a valve, a gas pipe clamp, a water storage barrel, a bidirectional delivery pump, a membrane aeration aerobic biological membrane reactor unit, a membrane aeration micro-aerobic biological membrane reactor unit and a membrane aeration anaerobic biological membrane reactor unit. According to the serial multi-stage MABR reaction intelligent water treatment system provided by the invention, through the multi-stage membrane aeration biological membrane reaction unit and the data monitoring and feedback unit, through real-time monitoring and feedback, various composite pollutants such as persistent organic pollutants (POPs) and the like can be efficiently removed, such as pesticides, nitrogen elements and the like in a water body; and energy conservation and carbon reduction can be facilitated.

The invention discloses an ecological risk assessment method for organic pollutants in a natural water body, and belongs to the field of ecological risk assessment of the natural water body, and the method comprises the steps: building a quantitative structure-activity relationship toxicity prediction model of species based on a machine learning and feature screening method; predicting and obtaining biotoxicity data in a to-be-predicted water body by using the quantitative structure-activity relationship model, establishing a species sensitivity distribution model of pollutants in the water body according to the biotoxicity data, and calculating predicted non-effect concentration; on the basis of database retrieval, acute toxicity experiments and an inter-species relationship prediction model, collecting, predicting and supplementing toxicity data of species in the water body, and evaluating the harmfulness of pollutants in the water body by using a risk entropy method and a comprehensive scoring method respectively. According to the method, ecological risk assessment is carried out by utilizing a machine learning method, the toxicity of the persistent organic pollutants in seawater and fresh water can be effectively assessed, and the ecological risk of the organic pollutants in the water body can be effectively assessed.

The invention discloses a paper base-PHA double-sided composite soil biodegradable agricultural mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural mulching materials and green high polymer materials. The mulching film comprises a paper base layer and a homologous polyhydroxyalkanoate covering layer arranged on the surface of the paper base layer. Through double-sided synergy of the water-based PHA coating on the soil sticking surface and the thermoplastic PHA extrusion film layer on the windward and rainy surface, and in combination with a'wet-to-heat 'integrated composite process and trace anhydride grafting, super-strong combination of a paper-plastic interface fiber tearing level is realized, and the problem that traditional paper-plastic is easy to layer is solved. Compared with a traditional fluorine-containing product, on the premise that total organic fluorine is not detected, the excellent barrier and moisture conservation performance is achieved with the thinner coating thickness by means of double barriers. The product has excellent mechanical laying adaptability and long-season weather resistance, is fully biodegradable, thoroughly solves the hidden dangers of micro-plastic residues and persistent organic pollutants, and is an ideal green agricultural covering material.

The invention discloses a Fe-N-C catalyst and application thereof in degradation of perfluorinated and polyfluoroalkyl substances, and belongs to the technical field of water treatment. The preparation method comprises the following steps: taking nitrogen-doped carbon derived from pine cones as a substrate, dissolving aminated pine cones, FeCl36H2O, sodium acetate and polyethylene glycol in ethylene glycol, reacting at 200 DEG C for 10 hours, putting in an inert gas atmosphere, and calcining at 900 DEG C for 2 hours; the Fe-N-C catalyst which simultaneously contains Fe nano particles (Fe NPs) and Fe-N single atoms (Fe SAs) and has different sizes and double sites is prepared. The catalyst and PMS are mixed and then added into water, and perfluoro and polyfluoroalkyl substances in the water can be degraded; the catalyst can activate PMS to promote formation of a non-free radical pathway, depends on a degradation mechanism of Fe (IV) = O and singlet oxygen (O), the degradation rate of PFOA within 2 hours reaches 90.5%, and the catalyst also shows relatively strong tolerance in different natural water bodies; a key thought is provided for designing the efficient catalyst, and a new technical direction is expected to be provided for environmental treatment of persistent organic pollutants such as PFOA.

This invention discloses a halophilic fast-growing bacillus strain that degrades chlorinated persistent organic pollutants and its applications. The strain is *Celeribacter baekdonensis* TBC005, with accession number GDMCC No:65236. The *Celeribacter baekdonensis* TBC005 of this invention exhibits excellent degradation ability against chlorinated persistent organic pollutants. After 14 days of anaerobic culture, it shows significant degradation of C... 10 H 16 The degradation rates of Cl6, TECP, and TCPP reached 21.5%, 16.7%, and 16.9%, respectively; after 35 days of cultivation, the degradation rates of C... 10 H 16 The degradation rates of Cl6, TECP, and TCPP can reach 50.7%, 59.2%, and 61.3%, respectively, and they can be applied to the environmental pollution control and bioremediation of chlorinated persistent organic pollutants.

This invention provides a method for detecting dichloronaphthalene, a persistent organic pollutant in soil sediments. The method includes: collecting soil sediment samples, pre-treating them by freeze-drying, grinding, and sieving to obtain a sample; extracting and purifying the sample using an organic solvent to prepare a test solution; analyzing and detecting the sample using ultra-high performance liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (UPLC-APCI-MS / MS), and calculating the measured value of dichloronaphthalene in the test solution by substituting the obtained peak area and fractionation ratio into a specific formula. This invention fills the gap in my country's technology for detecting dichloronaphthalene-type persistent organic pollutants in soil sediments. This method can effectively eliminate interference from complex matrices, accurately determine trace amounts of six dichloronaphthalene isomers, and has the advantages of high sensitivity, strong anti-interference ability, simple operation, and high detection accuracy.

This invention provides the preparation and application of a solid-phase microextraction fiber based on a bifunctionalized MOF@COF composite. The method involves first preparing a bihydroxyl-functionalized UiO-66-(OH)2 (MOF) via a solvothermal method; then functionalizing the UiO-66-(OH)2 surface with amino groups; then preparing a core-shell UiO-66-(OH)2@COF-OCH3 composite; and finally, preparing a MOF@COF-coated solid-phase microextraction fiber via an adhesive bonding method. The prepared MOF@COF composite adsorbent material exhibits a high specific surface area, excellent water and thermal stability, and high porosity. Furthermore, the composite material, which contains bifunctional groups (hydroxyl and methoxy), a π-electron structure, and metal ions, exhibits specific enrichment of halogenated persistent organic pollutants, such as polybrominated diphenyl ethers, organochlorine pesticides, and hydroxylated polychlorinated biphenyls, and has promising application prospects in environmental analysis and monitoring.

The present application relates to the technical field of water treatment, in particular to a preparation method of a confined carbon film electrode and application thereof. The advanced oxidation technology is a free radical oxidation system mainly with hydroxyl radicals and sulfate radicals. When degrading persistent organic pollutants, the hydroxyl radicals and sulfate radicals are easily consumed by chain reaction with anions in water and also produce toxic byproducts. In view of the above problems, the present application provides a confined carbon film electrode which is formed by depositing Fe2O3 / CNTs composite material on the surface of a microporous filter membrane to form a membrane electrode. The Fe2O3 / CNTs composite material is to confine iron oxide nanoparticles on the sidewall of the hollow pipe of carboxyl functionalized CNTs. The present application combines electrocatalysis technology and membrane separation technology, can more efficiently remove harmful substances such as persistent organic pollutants and heavy metals in water, and has higher water purification efficiency compared with the single electrocatalysis technology and membrane separation technology.

This invention discloses a sulfur-doped biomass carbon / modified carbon nitride composite material, its preparation method, and its application. It belongs to the field of selective recovery of precious metals and simultaneous degradation of persistent organic pollutants. This invention is the first to utilize a sulfur-doped biomass carbon / modified carbon nitride composite material to selectively recover precious metals and simultaneously degrade organic pollutants in industrial wastewater containing precious metals. This composite material has strong versatility, eliminating the need for pretreatment of wastewater such as pH adjustment and pollutant removal, greatly reducing the cumbersome procedures in traditional adsorption and recovery processes, saving energy, and offering both environmental and economic benefits.

The application belongs to the technical field of organic pollutant treatment, and particularly relates to a single-atom Co-anchored TiO2 catalyst and a preparation method and application thereof. The application provides a single-atom Co-anchored TiO2 catalyst, which comprises nano TiO2 and single-atom Co; the single-atom Co is dispersed on the surface of the nano TiO2; the loading amount of the single-atom Co is 0.1-1 wt%, the nano TiO2 is in the shape of a doughnut, and the specific surface area of the nano TiO2 is 100-150 m 2 / g. The single-atom Co-anchored TiO2 catalyst provided by the application can degrade dibutyl phthalate DBP in water by 100%, has a high single-atom loading amount, has higher visible light activity, and can significantly improve the removal rate of persistent organic pollutants such as plasticizers. The single-atom Co-anchored TiO2 catalyst provided by the application can catalytically degrade organic pollutants in water bodies with a pH value of 3-12, has excellent reusability, and greatly reduces the economic cost of the catalyst.

The application discloses Leuconostoc mesenteroides HYProbio-Y3, application thereof and a microbial preparation thereof, and belongs to the technical field of microorganisms.The Leuconostoc mesenteroides is Leuconostoc mesenteroides HYProbio-Y3 strain, and the preservation number is CGMCC No.30413.Under PFOA exposure, the immunity of Ruditapes philippinarum is destroyed.After intervention of the L.mesenteroides HYProbio-Y3, the immunity damage of the Ruditapes philippinarum caused by PFOA can be significantly improved, the immunity of the Ruditapes philippinarum can be effectively improved, the Ruditapes philippinarum can be helped to cope with the harm of persistent organic pollutants, and the development of the aquaculture industry can be promoted.

The invention provides a preparation method of a barium titanate / ethynyl conjugated polymer composite material, a product prepared by the preparation method and application of the product. According to the method, a simple solvothermal reaction is adopted, barium titanate is loaded on an ethynyl conjugated polymer, and therefore the heterojunction composite material with efficient photocatalysis and piezoelectric activity is formed. The material can efficiently generate hydroxyl free radicals (. OH) and superoxide free radicals (. O2-) in situ under piezoelectric-photocatalysis to quickly react with refractory organic pollutants, so that efficient removal of the organic pollutants is realized. The barium titanate / ethynyl conjugated polymer composite material provided by the invention can be recycled after being used for degrading persistent organic pollutants, and is more energy-saving and environment-friendly.

The present application relates to the technical field of composite materials, and particularly relates to a nitrogen-doped carbon quantum dot composite film and a preparation method thereof.A specific technical scheme is as follows: a preparation method of a nitrogen-doped carbon quantum dot composite film, comprising the following steps: (1) using polyethylene polyamine as a nitrogen source combined with a carbon source to perform a hydrothermal reaction, and completing preparation of carbon quantum dots; (2) adding 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide and N-hydroxysuccinimide or N-hydroxylthiosuccinimide into a hydrophilic modified polymer composite film to perform a reaction, and after the reaction is completed, a nitrogen-doped carbon dot modified composite film is obtained, and the nitrogen-doped carbon dot modified composite film is stored by being immersed in water.The nitrogen-doping design makes the nitrogen-doped carbon dot composite film have a good effect in capturing and enriching persistent organic pollutants such as perfluorinated compounds, and has good application value for treatment of new pollutants in the environment.

The invention relates to the technical field of photocatalysis of water treatment, and discloses a BiOCl / CeO2 heterojunction photocatalyst with a double-electric-field coupling effect as well as a preparation method and application of the BiOCl / CeO2 heterojunction photocatalyst. The preparation method comprises the following steps: firstly, synthesizing a BiOCl nanosheet with an exposed (001) crystal face through a hydrothermal method; then loading CeO2 nanoparticles on BiOCl by adopting a chemical deposition method to form a heterojunction; and introducing surface oxygen vacancies through illumination treatment to obtain the catalyst. By regulating and controlling the exposed crystal face of BiOCl, a bulk phase self-generated electric field (SIEF) of BiOCl is mutually coupled with a heterojunction interface electric field (IIEF), the SIEF drives bulk phase photo-generated electrons to directionally migrate to an interface, and the IIEF promotes interface charge separation, so that bulk phase and interface compounding of photo-generated carriers is synergistically inhibited; the catalyst shows excellent photocatalytic degradation performance on perfluorooctanoic acid (PFOA) in water, the defluorination rate can reach 30.59%, the activity is kept above 90% after the catalyst is recycled for 4 times, and an efficient and stable solution is provided for deep removal of persistent organic pollutants.

The invention belongs to the technical field of atmospheric environment monitoring, and particularly relates to an off-line portable atmospheric pollutant sampling device. The device comprises a PM2.5 cyclone cutting head used for cutting atmospheric particulates with the diameter larger than 2.5 micrometers; the particulate matter collecting chamber is used for collecting atmospheric particulates with the diameter smaller than PM2.5; the organic pollutant collecting chamber is used for collecting intermediate / semi-volatile persistent organic pollutants in the residual gas captured by the filter membrane; and the sucking pump is used for providing power. The device is integrally designed, small in size and light in weight; pM2.5 and volatile organic pollutants can be synchronously sampled and enriched at one time, so that the field working efficiency and the time consistency of data are greatly improved; stable sampling flow and cutting performance can be kept in a complex environment, and the sampling accuracy is ensured; the system can be flexibly arranged in specific microenvironments which cannot be covered by a plurality of fixed stations such as a fire scene and a transportation junction, and can accurately evaluate the individual real pollutant exposure level.

This invention relates to the field of wastewater treatment technology, and more particularly to a series-connected multi-stage MABR intelligent water treatment system. It includes a multi-stage membrane aeration biofilm reactor unit and a data monitoring and feedback unit. The multi-stage membrane aeration biofilm reactor unit comprises a MABR membrane module, magnetic rods, pipelines, valves, air clamps, a water storage tank, a bidirectional transfer pump, a membrane aeration aerobic biofilm reactor unit, a membrane aeration micro-aerobic biofilm reactor unit, and a membrane aeration anaerobic biofilm reactor unit. The series-connected multi-stage MABR intelligent water treatment system provided by this invention, through the multi-stage membrane aeration biofilm reactor unit and the data monitoring and feedback unit, can achieve efficient removal of various complex pollutants such as persistent organic pollutants (POPs), such as pesticides and nitrogen elements in water bodies, through real-time monitoring and feedback, thereby contributing to energy conservation and carbon reduction.

The present application relates to the technical field of persistent organic pollutants enrichment detection, and discloses a polycyclic aromatic hydrocarbon gas chromatography detection technology method based on hydrophobic covalent organic framework solid-phase microextraction fiber.The solid-phase microextraction fiber comprises a metal fiber as a core, is wrapped with polydopamine, and is obtained by growing a trifluoromethyl covalent organic framework in situ layer by layer; when 16 kinds of polycyclic aromatic hydrocarbons are enriched, the extraction time is as low as 12-19 min, and the desorption time is as low as 3-5 min.The solid-phase microextraction fiber cooperates with headspace sampling-gas chromatography-mass spectrometry to achieve a polycyclic aromatic hydrocarbon detection limit as low as 0.16 ng mL ‑1 The following has the advantages of precision RSD < 5.98%, wide detection range, and high polycyclic aromatic hydrocarbon substance detection rate.

The invention relates to the technical field of atmospheric monitoring instruments, in particular to passive sampling equipment for persistent organic pollutants in atmosphere, which comprises a sampling shell, a barrel cap detachably connected to the top of the sampling shell, a sampling column core detachably connected to the bottom of the barrel cap, and a turbulent flow adjusting assembly arranged in the sampling shell. The turbulent flow adjusting assembly is positioned below the sampling column core; a wind speed sensing assembly used for responding according to the environment wind speed is fixedly connected to the bottom in the sampling shell, a conversion assembly is arranged between the wind speed sensing assembly and the turbulent flow assembly, and the conversion assembly converts the environment wind speed change into an adjusting instruction or drives and dynamically adjusts the turbulent flow adjusting assembly in real time so as to adjust the circulation path and drift diameter parameters in the sampling shell; the flow path and path of gas are adaptively changed in a mechanical or electric control mode, and active compensation of sampling efficiency along with wind speed fluctuation is realized, so that the environmental adaptability and data reliability of the passive sampler in a severe environment are remarkably improved.

The invention relates to the technical field of composite materials, in particular to a nitrogen-doped carbon quantum dot composite film and a preparation method thereof. According to the specific technical scheme, the preparation method of the nitrogen-doped carbon quantum dot composite film comprises the following steps: (1) carrying out hydrothermal reaction by taking polyethylene polyamines as a nitrogen source and combining with a carbon source to complete preparation of carbon quantum dots; and (2) adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and N-hydroxysuccinimide or N-hydroxythiosuccinimide into the hydrophilic modified high-molecular polymer membrane, carrying out a reaction to obtain the nitrogen-doped carbon dot modified composite membrane after the reaction is completed, and soaking the nitrogen-doped carbon dot modified composite membrane in water for preservation. The nitrogen-doped design enables the nitrogen-doped carbon dot composite membrane to have a good effect in capturing and enriching persistent organic pollutants such as perfluorinated compounds, and the nitrogen-doped carbon dot composite membrane has a good application value in treatment of new pollutants in the environment.

The subject invention pertains a stable, three-dimensional (3D) photocatalyst composition comprising TiO2 doped with carbon derived from lignin. The photocatalyst composition has a stable, hollow, spherical or spheroid nanoparticle structure, which improves photodegradation under visible light irradiation over unmodified TiO2 photocatalysts. The subject invention also provides methods of preparing the photocatalyst, as well as methods using the photocatalyst to remediate contaminants such as pharmaceuticals, pathogens and persistent organic pollutants.

The invention discloses a method for degrading perfluorinated compounds, which is characterized in that a multi-needle array device is developed, efficient preparation of water free radical cations and clusters thereof is realized on the basis of low-energy environment discharge, and the water free radical cations with high reaction activity react with target pollutants, so that degradation is realized. The method has the advantages of high efficiency, no need of a catalyst, low energy consumption and the like, provides an innovative and efficient technical solution for treatment of persistent organic pollutants in the environment, and has important theoretical significance and application value.

The invention relates to a compound microbial agent and application thereof in repairing or managing and controlling a persistent organic pollution site, the compound microbial agent comprises compound microorganisms, and the compound microorganisms comprise pseudomonas, Bordetella, Island bacteria and Brucella in a ratio of (0.1-10): (0.1-10): (0.5-1): 1. The remediation efficiency of the persistent organic pollution site is improved, and the method is particularly suitable for green and efficient remediation of soil and underground water of the sandy soil site and pollution source reduction risk management and control and has the advantages of being low in cost, convenient to operate and the like, so that the method has important application prospects.

The present invention discloses a coaxial integrated implantable optofuel sensor, which includes a photoanode, a biocathode and a fuel. The photoanode is based on a light guiding optical fiber, and a gold layer, carbon nanotubes and Ag are sequentially modified at one end thereof. 2 S‑Bi 2 S 3 The heterojunction is obtained; the biocathode is based on a glass capillary. After a gold layer is modified at one end thereof, a nucleic acid aptamer for specifically recognizing a target is further modified, and then a proton exchange membrane is formed by curing with a perfluorosulfonic acid solution at the port of the modified end; the fuel is an ascorbic acid solution; the coaxial is formed by inserting the photoanode into the biocathode to form an integrated structure. The present invention can be used for detection applications in persistent organic pollutants, and solves problems such as low sensitivity, poor selectivity, easy contamination and difficulty in realizing in-situ detection caused by separately implanting multiple electrodes and light sources into a complex environment.

This disclosure provides a method for removing organic matter from drinking water using bio-enhanced activated carbon, belonging to the field of water treatment technology. The method includes: passing the effluent from sand-filtered drinking water into a filter column filled with activated carbon to operate the filter column; wherein the organic matter in the effluent includes natural organic matter and persistent organic pollutants, and the concentration of manganese ions in the effluent is controlled at 0.1-0.2 mg / L; continuously operating the filter column for a preset time to form a biofilm on the surface of the activated carbon; wherein the biofilm contains heterotrophic bacteria, manganese redox bacteria, and electroactive microorganisms; the manganese redox bacteria convert manganese ions into biogenic manganese oxides; the continuous generation of biogenic manganese oxides promotes the formation of a stable C-O-Mn coordination structure on the activated carbon surface; the C-O-Mn coordination structure and the electroactive microorganisms jointly construct the electroactivated biochar interface, achieving enhanced removal of organic matter.

The invention discloses a three-dimensional hydrogen bond-metal organic framework composite material constructed based on an ultrasonic-solvothermal method and application thereof, and belongs to the technical field of organic framework materials. According to the composite material, a hydrogen bond connected two-dimensional layered precursor is constructed through an ultrasonic-solvothermal method, and Co < 2 + > and acetic acid are introduced to be converted into three-dimensional regular octahedral particles through solvothermal reaction. The composite material has double structure advantages of a hydrogen bond organic framework and a metal organic framework, and has excellent pH stability and visible light response characteristics. By utilizing the composite material, efficient degradation of persistent organic pollutants such as perfluorooctanoic acid can be realized through an adsorption-photodegradation synergistic mechanism, and a new solution is provided for water environment treatment.

The invention discloses a method for extracting and detecting various persistent organic pollutants in micro-plastics, belonging to the technical field of pollutant detection.The method comprises the following steps: accurately weighing a micro-plastic sample, adding a substitute standard mixed solution and a mixed solvent of n-hexane and dichloromethane, carrying out ultrasonic-assisted extraction and centrifugation to obtain an extracting solution, and collecting the extracted solution; after nitrogen blowing concentration, a Florisil SPE small column is adopted for purification and elution, and then nitrogen blowing concentration, internal standard addition and normal hexane redissolution treatment are carried out; a gas chromatography time-of-flight mass spectrometry (GC-TOF / MS) coupling technique is adopted, and under the condition of optimized temperature programming chromatography and mass spectrometry parameters, synchronous separation, targeted detection and quantitative analysis of 45 organic pollutants are completed through one-time sample introduction. An extraction, detection and data processing integrated technical system is adopted, efficient and synchronous analysis of various pollutants is achieved, sample loss and pollution are reduced, the dosage of organic solvents is reduced, and high throughput, high sensitivity and wide applicability are achieved.

The invention discloses a support-free hydrogel photoelectrochemical / fluorescent bimodal sensor, which comprises a working electrode and a reference electrode / counter electrode, the working electrode and the reference electrode both comprise a gold wire, a gel layer and a solidification layer, the gel layer is coated on the surface of the gold wire, the solidification layer is coated on the surface of the gel layer, and the gel layer is coated on the surface of the counter electrode. One end of the gold wire extends out of the gel layer and the solidification layer; the solidification layers are calcium alginate layers; the gel layer of the working electrode is a gel layer containing hydrogel, a photoinitiator, a silver-wrapped-in-gold nanowire and a photoelectric material; the gel layer of the reference electrode is a gel layer containing hydrogel, a photoinitiator and a gold-clad silver nanowire. The support-free hydrogel sensor is a hydrogel sensor which is not supported by a rigid substrate, can be used for detecting or continuously monitoring persistent organic pollutants, and is particularly suitable for detecting or continuously monitoring persistent organic pollutants in organisms; the problems of mechanical mismatching, non-specific adsorption, poor biocompatibility and the like of an existing implantable living body photoelectrochemical sensor are solved.

The application discloses a method for analyzing multiple halogenated phenols based on hydrogen bond enhanced halogen bond recognition, which mainly comprises the following steps: constructing a selective recognition surface enhanced Raman substrate, selectively capturing target molecules, collecting signals and extracting chemical characteristics, embedding physical / chemical prior knowledge into machine learning multi-component decoupling, and the like. The application overcomes the interference of complex matrix in water, realizes selective capture, breaks through the black box limitation of traditional pure data driven model, constructs a physical information guided machine learning model, and realizes the detection of multiple halogenated phenols. The application can be used for selectively capturing halogenated phenol persistent organic pollutants (such as trichlorophenol, tribromophenol, tetrabromobisphenol A and the like) in a water phase environment containing background inorganic salt or non-halogenated aromatic organic matter interference, and realizes the qualitative screening of target pollutants in combination with a surface enhanced Raman spectroscopy technology.

The present invention discloses a solid-phase microextraction fiber of a fluorine-click multi-component covalent organic framework material and a preparation method thereof, belonging to the field of preparation of solid-phase microextraction materials. A COF material with an adjustable ratio of functional group methoxy to double bond is constructed by using a three-component unit, and then thiophenol is click-bonded to the fluorobenzene through a thiol-ene click chemical bond to construct a COF-V-X-F solid-phase microextraction material with an adjustable number of F functional groups. The material is coated on the surface of a stainless steel wire to prepare an SPME fiber, which can be applied to the efficient enrichment and extraction of persistent organic pollutants perfluorinated compounds. The room-temperature synthesis method makes the synthesis of COF mild and convenient. The prepared material has superhydrophobicity and F-F affinity. With the addition of methoxy groups, the coating maintains high stability after post-modification.