25 results about "Persistent organic pollutant" patented technology

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.

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 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 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 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.

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 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 application belongs to the technical field of environmental functional materials, and particularly relates to a sulfidized nano zero-valent iron composite material, a preparation method and application thereof. The sulfidized nano zero-valent iron composite material comprises biochar and sulfidized nano zero-valent iron loaded thereon. The application provides a preparation method of the sulfidized nano zero-valent iron composite material, which comprises the following steps: dispersing biochar in a ferrous salt solution to form a mixed solution under the protection of an inert atmosphere; dissolving a reducing agent and a sulfidizing agent in an alkaline solution to obtain a mixed reaction solution; and adding the mixed reaction solution into the mixed solution to obtain the sulfidized nano zero-valent iron composite material through reduction and sulfidization reaction. The sulfidization modification technology is combined with biochar loading, the biochar effectively prevents nano particle agglomeration, improves material stability and dispersity, the adsorption function and the catalytic degradation function of the sulfidized zero-valent iron are synergistic, and the removal efficiency of the composite material on persistent organic pollutants such as perfluorinated compounds is significantly improved.

The invention discloses application of baicalin to preparation of a marine antifouling composition. The marine antifouling composition is used for preventing adhesion of marine large fouling organisms. The baicalin disclosed by the invention is derived from dry roots of a traditional bulk traditional Chinese medicinal material scutellaria baicalensis, belongs to a pure natural plant extract, is completely free of heavy metals such as copper, tin and DDT or persistent organic pollutants when being used as a marine antifouling active component, has no accumulated toxicity to marine water, bottom mud and marine organisms, is quick and thorough in biodegradation, and is free of toxic and side effects. Ecological enrichment and food chain transmission risks caused by a traditional antifouling agent can be fundamentally eliminated, and the zero-pollution target of ocean antifouling is truly achieved.

The present application belongs to the field of environmental pollution and environmental chemistry, and particularly relates to a model and method for simulating the marine environmental behavior and food web migration of typical persistent organic pollutants. The model comprises atmosphere, seawater (including suspended particles), sediment (including pore water), and a food web unit composed of multi-trophic level organisms (including plankton, benthos and fish of different diets). The present application integrates biological energy science and input parameters of aquaculture activities (such as feed delivery, residual feed loss, and fecal excretion), and constructs a multi-medium non-steady-state fate model of the aquaculture marine ecosystem. The model can accurately quantify the cross-medium flux of organic pollutants (such as PFAS, PCBs, DDTs, pesticides, etc.) between the "aquaculture source-environment-organism", realizes the quantitative tracing of the environmental contribution rate of aquaculture activities, and can predict the temporal and spatial distribution and enrichment level of pollutants in wild fish, thereby providing a scientific basis for the ecological risk management of the marine aquaculture area and the overall marine environment.

This invention relates to the field of agricultural environmental pollutant control technology, and more specifically, to a method for constructing a recombinant genetic transformation vector of the ALMT10 gene to increase the absorption and accumulation of emerging persistent organic pollutants (PFOA) in plants. The nucleotide sequence of the ALMT10 gene is shown in SEQ ID NO.1, and the ALMT10 gene can promote the absorption of PFOA by plants. Adding malic acid, the specific transporter of the protein encoded by the key gene ALMT10, can further activate ALMT10 expression and promote the absorption and accumulation of PFOA in crops, thereby achieving efficient enrichment and remediation of PFOA.

The invention relates to the field of microorganisms, and discloses a construction method and application of an electroactive flora for reductive degradation of organic pollutants, the construction method of the electroactive flora for reductive degradation of the organic pollutants comprises the following steps: obtaining a bacterial source containing electrochemical active bacteria, degrading bacteria and biological enhancement bacteria, carrying out selective culture medium screening and antibiotic gradient domestication to obtain a tolerant flora; respectively culturing electrochemical active bacteria, degrading bacteria and biological enhancement bacteria in the tolerant flora to logarithmic phases, adjusting the concentration of a bacterial suspension, and mixing according to a preset proportion to obtain a mixed bacterial suspension; inoculating the mixed bacterial suspension into a culture medium, and performing anaerobic treatment and constant-temperature culture to obtain the electroactive flora. Through directional screening and antibiotic gradient domestication, the tolerance and functional specificity of the flora are enhanced, and the regulation and combination of electrochemical active bacteria, degrading bacteria and biological enhancement bacteria are combined, so that efficient reduction degradation of persistent organic pollutants such as sulfonamide antibiotics, polychlorophenols, polycyclic aromatic hydrocarbons and the like is realized.

The invention belongs to the technical field of environmental functional materials, and particularly relates to a vulcanized nano zero-valent iron composite material and a preparation method and application thereof. The vulcanized nano zero-valent iron composite material comprises biochar and vulcanized nano zero-valent iron loaded on the biochar. The invention provides a preparation method of a vulcanized nano zero-valent iron composite material, which comprises the following steps: under the protection of an inert atmosphere, dispersing biochar in a ferrite solution to form a mixed solution; dissolving a reducing agent and a vulcanizing agent in an alkaline solution to obtain a mixed reaction solution; and adding the mixed reaction solution into the mixed solution, and carrying out reduction and vulcanization reaction to obtain the vulcanized nano zero-valent iron composite material. According to the invention, a sulfuration modification technology is combined with biochar loading, the biochar effectively prevents agglomeration of nanoparticles and improves the stability and dispersibility of the material, the adsorption effect of the biochar and the catalytic degradation function of sulfurized zero-valent iron generate synergy, and the removal efficiency of the composite material on perfluorinated compounds and other persistent organic pollutants is significantly improved.

The invention discloses a method for detecting persistent organic pollutants in marine sediments, and belongs to the technical field of marine pollutant detection methods. The method comprises the following steps: mixing a pretreated sediment sample with anhydrous sodium sulfate, soaking with an n-hexane-acetone mixed solvent and concentrated hydrochloric acid, then carrying out ultrasonic extraction, carrying out liquid-liquid distribution on an extracting solution to obtain an organic phase, concentrating the organic phase, dissolving the organic phase in methanol to obtain a methanol extracting solution, and carrying out solid-liquid separation on the methanol extracting solution; and loading the sample to an activated high-crosslinking polymethacrylate-styrene solid-phase extraction column, sequentially carrying out sectional elution by using ethyl acetate, dichloromethane and methanol, concentrating the eluent, fixing the volume, purifying, and carrying out chromatographic analysis. By optimizing an extraction system and adopting a high-selectivity solid-phase extraction material and a segmented elution procedure, the technical problem that polar and non-polar components are difficult to synchronously and efficiently extract and purify is solved. The method is stable in recovery rate, and is suitable for synchronous and accurate determination of trace persistent organic pollutants in a complex marine sediment matrix.

The invention discloses a ternary cobalt manganese iron Prussian blue analogue calcined derivative catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment advanced oxidation. The catalyst is prepared by taking potassium ferricyanide, cobalt chloride, manganese chloride and polyvinylpyrrolidone as raw materials through magnetic stirring, aging, centrifuging, drying, grinding and calcining. By constructing a ternary metal synergistic system and introducing rich oxygen vacancies into the material, the activation performance of the catalyst on persulfate is remarkably improved, and organic pollutants in water can be efficiently degraded. The ternary cobalt-manganese-iron Prussian blue analogue calcined derivative catalyst has the advantages of high catalytic activity, good stability, strong environmental tolerance and the like, can be widely used for efficiently degrading persistent organic pollutants in a water body, and has a practical application prospect.

The invention relates to a preparation method and device of an underground permeable reactive barrier, and the underground permeable reactive barrier comprises the following components in parts by weight: steel slag, water glass, manganese sand, metal-rich biochar, fluorgypsum, fly ash, red mud, ball-milled hematite, gravel and an engineering bacterial agent. Compared with the prior art, the metal-rich biochar is used as an underground permeable reactive barrier material, electrons are released in the metal elementary substance corrosion process, dissolved-out low-valence metal ions can quickly consume dissolved oxygen in the environment, and a reducing environment beneficial to survival of additional strains is created; meanwhile, polymorphic variable valence metal in the metal-rich biochar bulk phase can effectively mediate the electron transfer process of a microbial extracellular respiratory chain, electrons are transferred to terminal receptor metal ions or persistent organic pollutants, and providing of electrons for reducing Cr < 6 + > and removing toxic groups of benzene rings is accelerated. The metal-rich biochar is matched with the engineering bacterium agent, so that efficient removal of various macromolecular organic pollutants and rapid stabilization of high-valence heavy metals can be realized.

The present application relates to the technical field of solid waste treatment and resource utilization, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, which is made of waste incineration fly ash, apatite group minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, the apatite group minerals, the zero-valent iron powder and the persulfate to obtain a composite powder; performing frequency conversion mechanical-chemical 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 the alkali activator, pouring and forming, and curing. Through the time sequence regulation of mechanical energy input, the present application step by step drives the reduction reaction and the oxidation reaction in the same system, solves the compatibility problem of the reducing agent and the oxidizing agent, synergistically degrades different types of persistent organic pollutants, stabilizes the heavy metals, and resources the fly ash to prepare a geopolymer material with mechanical properties.

The invention discloses a method for treating organic pollutant wastewater by using a spacer covalent organic framework, which is used for degrading organic pollutants in wastewater by using the spacer covalent organic framework as a photocatalyst. Wherein the spacer covalent organic framework is at least one of an olefin spacer covalent organic framework, an alkyl spacer covalent organic framework and a benzene ring spacer covalent organic framework. According to the method for treating the organic pollutant wastewater by utilizing the spacer covalent organic framework, a pollutant degradation system which is efficient, high in selectivity and excellent in stability can be constructed under the action of the spacer covalent organic framework, so that the organic pollutants in the wastewater can be efficiently degraded; the method is particularly suitable for wastewater treatment and degradation of persistent organic pollutants, has the advantages of simple process, convenience in operation, low cost, high degradation efficiency, good degradation effect, good adaptability and the like, and is an efficient and controllable organic pollutant photocatalytic treatment strategy.