48 results about "Polychlorinated biphenyl" patented technology

The invention belongs to the technical field of organic pollution treatment, and relates to a biochar-LDH-nZVI-GO composite material for organic pollution remediation and a preparation method and application thereof.The preparation method comprises the steps that graphene oxide is ultrasonically dispersed in deionized water, magnesium salt and aluminum salt are added to form uniform suspension liquid, then the uniform suspension liquid is mixed with biochar suspension liquid, and the biochar-nZVI-GO composite material is obtained; carrying out pH (Potential of Hydrogen) regulation and a hydrothermal crystallization reaction, so as to prepare a biochar-Mg / Al-LDH-GO compound; and dispersing the compound in an organic solvent, sequentially adding FeSO4. 7H2O and a NaBH4 solution in an inert atmosphere to carry out a reduction reaction, and finally washing and drying to obtain the biochar-LDH-nZVI-GO composite material. The material shows high-efficiency removal capacity on various organic pollutants such as trichloroethylene, chlorobenzene and polychlorinated biphenyl, is suitable for high-efficiency green remediation of organic pollutants in soil and water, and has good popularization and application prospects.

The invention discloses a plant-microorganism enhanced multiphase extraction organic pollution remediation method. The method comprises the steps of site evaluation, phytoremediation system construction, microbial remediation system construction, multiphase extraction enhancement, remediation process monitoring and adjustment, pollutant removal and ecological restoration. According to the method, a plant-microorganism enhanced multiphase extraction synergistic effect remediation system is constructed, the problem that the efficiency of a single plant remediation or microorganism remediation technology is low is effectively solved, degradation and removal of organic pollutants are accelerated, efficient treatment of refractory pollutants such as polycyclic aromatic hydrocarbons, polychlorinated biphenyls and organophosphorus pesticides is achieved, and the method has the advantages of being simple in process, low in cost and good in application prospect. In the remediation process, the influence on the ecological environment is small, secondary pollution is not likely to be generated, and the method has both economical efficiency and environmental friendliness and is suitable for treatment of multiphase pollutants in complex contaminated sites including soil, water and solid waste.

The invention discloses an analysis method for simultaneously detecting organochlorine pesticide and polychlorinated biphenyl, which comprises the following steps of: simultaneously extracting organochlorine pesticide and polychlorinated biphenyl in a water sample by adopting a mixed extraction solvent, dehydrating, concentrating and fixing the volume of extract liquor, separating and measuring by adopting a gas chromatography-mass spectrometry method, and quantifying by adopting an internal standard method. When the mixed extraction solvent is n-hexane / dichloromethane with the volume ratio of 9: 1 and 1% by mass of polyethylene glycol 4000 is added, the recovery rates of water samples with the measured concentrations of 5.00 ng / L, 20.0 ng / L, 40.0 ng / L and 80.0 ng / L are 83.6%-95.4%, 91.2%-105.6%, 93.5%-104.7% and 92.8%-106.9% respectively, the relative standard deviations are 6.1%-9.2%, 3.3%-8.2%, 3.2%-6.3% and 3.4%-7.5% respectively, compared with the prior art, the extraction efficiency is remarkably improved, and the method has the advantages that the method is simple, the cost is low, and the method is suitable for industrial production. The accuracy and precision of the method completely meet the determination and analysis requirements for measuring complex water samples.

The invention provides a preparation method of a spherical mesoporous carbon material. The method comprises the following steps: obtaining a sucrose solution; adding sodium polyacrylate into the sucrose solution; adding silica sol into the sucrose solution added with sodium polyacrylate, and uniformly mixing; adding concentrated sulfuric acid into the sucrose solution added with sodium polyacrylate and silica sol, uniformly mixing, and heating for reaction; washing the reaction product to be neutral, and then drying the reaction product; grinding the dried reaction product, and calcining in a nitrogen atmosphere; and eliminating the silicon template in the reaction product to obtain the spherical mesoporous carbon material. The invention also provides a spherical mesoporous carbon material and a method for simultaneously detecting diisopropylnaphthalene, polychlorinated biphenyl and a photoinitiator in paper for cigarettes. According to the preparation method of the spherical mesoporous carbon material, the prepared high-dispersity spherical mesoporous carbon material is developed in pore structure and high in specific surface area, more adsorption sites can be provided, and the mesoporous structure is beneficial to rapid diffusion of the material in a solution.

The invention discloses a method for simultaneously analyzing polychlorinated biphenyls, polycyclic aromatic hydrocarbons and organochlorine pesticides in water, which comprises the following steps: simultaneously extracting polychlorinated biphenyls, polycyclic aromatic hydrocarbons and organochlorine pesticides in a water sample by using a mixed solvent of n-hexane and dichloromethane, merging while extracting, purifying, concentrating and fixing volume, and testing on a machine in two groups, the polychlorinated biphenyl and the organochlorine pesticide are independently used as a group, the polycyclic aromatic hydrocarbon is used as a group, when an extraction solvent adopts a mixed solvent of dichloromethane and n-hexane, the extraction efficiency is gradually increased along with the increase of the proportion of the n-hexane, and when the volume ratio of the n-hexane to the dichloromethane is 9: 1, the extraction recovery rate can reach 78.9%-111%. When 1% of polyethylene glycol 4000 is added in the mixed extraction process with the volume ratio of n-hexane to dichloromethane being 9: 1, the extraction efficiency is remarkably improved, the extraction efficiency recovery rate reaches 84.6%-112%, and it is indicated that the addition of polyethylene glycol 4000 has the remarkable improvement effect. Compared with the prior art, the extraction efficiency is remarkably improved, and the accuracy and precision of the method completely meet the determination and analysis requirements for measuring complex water samples.

The application discloses a method for detecting polychlorinated biphenyl by using an electrochemical aptamer sensor. x The sensor comprises a glassy carbon electrode, a surface of a detection end of the glassy carbon electrode is decorated with an electroactive nanomaterial, the electroactive nanomaterial comprises Ti3C2T 0000001 Nanosheet, a conductive polymer material is embedded in an interlayer structure of the nanosheet and forms a composite nanomaterial, and gold nanoparticles are deposited on a surface of the composite nanomaterial; a capture chain is self-assembled on the electroactive nanomaterial, a specific aptamer probe is combined on the capture chain, a DNA double-stranded structure is formed, and an electroactive label is introduced. In the application, the sensor has the advantages of wide detection range, low detection limit, strong anti-interference ability, good stability and the like, can realize specific detection of polychlorinated biphenyl, has the advantages of low cost, short time consumption, high accuracy, good adaptability and the like, and has important significance for rapid detection of polychlorinated biphenyl.

The invention provides a magnetic porous carbon-coated cyclodextrin / epichlorohydrin copolymer capable of rapidly adsorbing polychlorinated biphenyl as well as a preparation method and application of the magnetic porous carbon-coated cyclodextrin / epichlorohydrin copolymer, and belongs to the technical field of adsorption materials. Waste unsaturated polyester resin is adopted as a raw material, a magnetic porous carbon material is prepared through a high-temperature activation method and a one-pot method, and the magnetic porous carbon-coated cyclodextrin / epichlorohydrin copolymer composite material is further synthesized through an emulsion polymerization method. The adsorbent has a good adsorption effect on various polychlorinated biphenyl, adsorption equilibrium can be achieved within 5 min, the adsorption capacity ranges from 77.04 mu g / g to 98.04 mu g / g, after adsorption is repeated for 5 times, the adsorption capacity is still kept to be 80% or above of an initial value, and the adsorption removal rate of the polychlorinated biphenyl in soil and water samples reaches 90% or above. The adsorption material is an efficient and reproducible adsorbent with potential application prospects in the aspect of polychlorinated biphenyl treatment.

A highly unsaturated fatty acid or a highly unsaturated fatty acid ethyl ester that has been produced using as a feedstock oil a fat or oil that contains highly unsaturated fatty acids as constituent fatty acids and which has been reduced in the contents of environmental pollutants, wherein among the dioxins contained, polychlorinated dibenzoparadioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are contained in amounts of less than 0.05 pg-TEQ / g and coplanar PCBs (Co-PCBs) in amounts of less than 0.03 pg-TEQ / g. Also disclosed is a method for producing the highly unsaturated fatty acid or highly unsaturated fatty acid ethyl ester by the steps of removing free fatty acids and environmental pollutants by thin-film distillation from a feedstock oil, ethyl esterifying the resulting fat or oil, and refining the same by rectification and column chromatography.

Basalt selectively adsorbs organic toxic materials, such as dioxins, furans, polychlorinated biphenyls (PCBs), bis(2-ethylhexyl)phthalate, arsenic, mercury, chromium, copper, nickel, zinc, cadmium, lead, and the like, from substances such as sediment, which contains water and the toxic materials.

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 application discloses a carboxylic acid rare earth complex, a composite material, and a preparation method and application thereof. The carboxylic acid rare earth complex is formed by complexing a carboxylic acid shown in formula (I) with a rare earth element. The composite material prepared by combining the carboxylic acid rare earth complex with a silane coupling agent and silicon dioxide can sensitively detect polychlorinated biphenyl.

A method of the decontamination of dangerous substances from wood and / or wooden materials, characterized by the fact that the contaminated wood and / or wooden material is shredded to a maximum size of 1,000 cm3. It is then rinsed with a solution of water containing potassium or sodium soap, and / or a surfactant, and / or sodium hydroxide, and / or potassium hydroxide, and / or calcium hydroxide in a concentration of 0.1 to 15% by weight and at a minimum temperature of 15°C. The cellulose and lignin contained in the wood or wooden material absorb the mixture of water with potassium or sodium soap, and / or a surfactant, and / or sodium hydroxide, and / or potassium hydroxide, and / or calcium hydroxide, leading to the softening of cellulose and lignin fibers. At the same time, this process releases toxic organic substances or volatile inorganic substances, particularly from the group of polychlorinated biphenyls, polycyclic aromatic hydrocarbons, arenes, and aliphatic compounds.

A highly unsaturated fatty acid or a highly unsaturated fatty acid ethyl ester that has been produced using as a feedstock oil a fat or oil that contains highly unsaturated fatty acids as constituent fatty acids and which has been reduced in the contents of environmental pollutants, wherein among the dioxins contained, polychlorinated dibenzoparadioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are contained in amounts of less than 0.05 pg-TEQ / g and coplanar PCBs (Co-PCBs) in amounts of less than 0.03 pg-TEQ / g. Also disclosed is a method for producing the highly unsaturated fatty acid or highly unsaturated fatty acid ethyl ester by the steps of removing free fatty acids and environmental pollutants by thin-film distillation from a feedstock oil, ethyl esterifying the resulting fat or oil, and refining the same by rectification and column chromatography.

The present invention provides an environmentally friendly PVC composite material and its production method, belonging to the technical field of resin materials; its preparation process includes the following steps: adding waste cooking oil for reaction; reacting with terephthalic acid and adipic acid respectively and compounding; adding pentaerythritol to prepare an auxiliary heat stabilizer; adding isopropyl thiocyanate to modify multi-walled carbon nanotubes; adding phytic acid solution to prepare an environmentally friendly flame retardant; mixing and preparing the PVC composite material. The PVC composite material product obtained by mixing PVC resin with modified carbon nanotubes, composite environmentally friendly plasticizer, environmentally friendly heat stabilizer, auxiliary heat stabilizer and environmentally friendly flame retardant in the present invention, due to the unique tubular structure and high specific surface area of carbon nanotubes, has a special adsorption effect on harmful substances such as dioxins and polychlorinated biphenyls generated by the high-temperature pyrolysis of PVC, can effectively adsorb the harmful substances generated by the PVC material, thereby reducing the air pollution caused by harmful substances and achieving the purpose of green environmental protection.

The application discloses a dioxin pretreatment method in fly ash samples, and belongs to the technical field of environmental organic pollutant analysis and detection. The pretreatment method comprises the following steps: (1) fly ash sample pretreatment: drying, grinding and acidizing the fly ash sample to make the dioxin more easily extracted; (2) fly ash sample extraction: filtering the product obtained in the step (1), performing Soxhlet extraction on the solid phase, performing liquid-liquid extraction on the liquid phase, and then combining and rotary-evaporating and concentrating; (3) fly ash sample extraction liquid purification: purifying the fly ash sample extraction liquid obtained in the step (2), including sequentially passing the extraction liquid through a purification column and a purification column to obtain an analysis sample. The method can remove the interference of polychlorinated biphenyl and polybrominated biphenyl ether on the detection of dioxin, is simple in process, easy to operate, greatly reduced in cost, high in detection accuracy and high in recovery rate.

The utility model discloses a wastewater treatment device, the device comprises a cavitation oxidation unit and an oxidation reaction unit communicated with the cavitation oxidation unit, the cavitation oxidation unit utilizes the combination of a hydrodynamic cavitation reactor and an ozone generator to enable ozone oxidation and cavitation oxidation to act synergistically, and the oxidation reaction unit is communicated with the oxidation reaction unit. Substances such as polychlorinated biphenyl and micromolecular carboxylic acid which cannot be thoroughly treated by a wet oxidation reactor are effectively treated, and the effluent quality is improved.

Embodiments described herein are directed to methods and systems for treating wastewater or storm water using vermifiltration. The wastewater can come from various sources, such as agricultural sources, municipal and industrial sources, wineries, the dairy industry, and many others. The systems can include vermicomposting beds that are capable of removing high amounts of contaminants, pollutants, and / or toxic substances from wastewater. The wastewater may be applied to vermicomposting beds, for example, by an irrigation system. The irrigation system may provide, for example, improved bed coverage and more even saturation. The vermicomposting beds can remove various harmful substances from the wastewater, such as petroleum products; industrial chemicals; heavy metals (e.g., lead, mercury, cadmium, arsenic); pesticides (e.g., atrazine, chlorpyrifos); and organic compounds (e.g., phenols, polycyclic aromatic hydrocarbons (“PAHs”), polychlorinated biphenyls (“PCBs”)).

The present invention relates to highly unsaturated fatty acids or ethyl esters of highly unsaturated fatty acids and methods for producing the same, as well as medicines, additives or foods. The highly unsaturated fatty acids or ethyl esters of the present invention are produced using oils and fats containing highly unsaturated fatty acids as constituent fatty acids as raw material oils and have reduced content of environmental pollutants. Among the dioxins contained, the content of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans is less than 0.05 pg-TEQ / g, and the content of coplanar polychlorinated biphenyls is less than 0.03 pg-TEQ / g. In the method for producing highly unsaturated fatty acids or ethyl esters of highly unsaturated fatty acids, the content of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and coplanar polychlorinated biphenyls is reduced by the following steps: a) using thin film distillation to remove free fatty acids and environmental pollutants from the raw material oil containing highly unsaturated fatty acids as constituent fatty acids, b) hydrolyzing or ethyl esterifying the obtained oils and fats containing highly unsaturated fatty acids, and c) refining by distillation and column chromatography.

The invention discloses a quinolyl-functionalized three-dimensional covalent organic framework material, a solid-phase microextraction probe and application, the quinolyl-functionalized three-dimensional covalent organic framework material is formed by modifying 3D-COF with sodium p-styrenesulfonate, and the material is marked as 3D-QS-COF; the 3D-COF is formed by copolymerizing benzidine and 4 ', 5'-bis (3, 5-dimethylphenyl)-3 ', 6'-dimethyl-[1, 1 ': 2', 1 ''-triphenyl] 3, 3 '', 5, 5 ''-tetracarboxaldehyde. According to the preparation method, sodium p-styrenesulfonate is used for post-modification, 3D-QS-COF is synthesized through a Povarov reaction, functional sites and pore structures are regulated and controlled, and pore channel collapse and crystallinity disappearance are avoided; the polychlorinated biphenyl derivative has a large number of quinoline rings, benzene rings and sodium sulfonate groups, so that the polychlorinated biphenyl derivative has more binding sites and can interact with various polychlorinated biphenyl, and a foundation is laid for high-precision detection of trace or ultra-trace polychlorinated biphenyl in food.

The invention belongs to the technical field of environmental biology, and particularly discloses a microorganism dechlorination method for enhancing combined pollution of microplastics and polychlorinated biphenyl. The method comprises the following step: adding natural humin and peptone into a coexisting culture system containing polychlorinated biphenyl, anaerobic dechlorination microorganisms and microplastics. The invention discloses a microbial dechlorination method for enhancing combined pollution of microplastics and polychlorinated biphenyl, which is characterized in that natural humin and peptone are applied to a microplastics and polychlorinated biphenyl (PCBs) coexisting microbial dechlorination culture system for the first time, and the natural humin and peptone are combined to generate a remarkable synergistic effect; the method can effectively relieve the inhibition of microplastics on the dechlorination activity of microorganisms, and provides a brand new and efficient solution for biological enhancement repair of typical combined pollution environments such as estuaries, sediments and the like.

The invention provides a method for removing polychlorinated biphenyl compounds, and relates to the field of pollutant treatment. Comprising the following steps: adding nano zero-valent iron into soil, and planting myriophyllum spicatum in the soil. The myriophyllum spicatum and the nano zero-valent iron are combined for use, so that ammonia nitrogen compounds and polychlorinated biphenyl compounds in water and soil can be effectively removed.

The present application belongs to the technical field of kitchen waste energy processing, and provides a kitchen waste processing system and a running method thereof. The processing system comprises a solid-liquid separation device, a dryer, a crusher, a hydrothermal reaction kettle, an ammonia recovery unit, a photocatalytic quartz reactor, an ammonia-hydrogen engine, a fuel cell system, a boiler, a steam turbine and a generator. The addition of PCB wastewater in the garbage leachate can improve the light transmittance and photocatalytic effect of the garbage leachate, the catalyst can accelerate the photocatalytic hydrogen production rate, the condensed ammonia is incorporated into the boiler using hydrothermal carbon as fuel, which can accelerate the combustion reaction rate, achieve the purpose of CO2 substantial emission reduction, and help the "carbon neutralization and carbon peak" policy. The whole system structure is reasonable, which can realize the large-scale volume reduction of the garbage, and achieve the technical purpose of the collaborative treatment of kitchen waste, sludge and polychlorinated biphenyl wastewater, and maximize the simultaneous energy and resource utilization of the garbage.

Basalt selectively adsorbs organic toxic materials, such as dioxins, furans, polychlorinated biphenyls (PCBs), bis(2-ethylhexyl)phthalate, arsenic, mercury, chromium, copper, nickel, zinc, cadmium, lead, and the like, from substances such as sediment, which contains water and the toxic materials.

Described herein are poly(arylene sulfide) (“PAS”) polymers (PASP) including recurring units formed from selected dihalofluorene monomers. Surprisingly, at relative low dihalofluorene monomer concentrations, the PAS polymers (PASP) have significantly increased glass transition temperatures (“Tg”) and impact performance, relative to analogous PAS homopolymers and PAS polymers (PASP) including recurring units formed from 4,4′-dibromobiphenyl (“DBBP”). Simultaneously, the PAS polymers (PASP) also retain high elastic modulus. Furthermore, the PAS polymers (PASP) are free of recurring units formed from polyhalogenated biphenyls (e.g. DBBP and polychlorinated biphenyls) and, therefore, are not currently subject to restrictive governmental regulation. Due at least in part to the excellent thermal (Tg, Tc and Tm) and impact properties of the PAS polymers (PASP), the PAS polymers (PASP) and PAS polymer compositions can be desirably incorporated into wide variety of articles including, but not limited to, automotive articles, electrical and electronic articles, articles for aerospace and oil and gas articles.

The invention discloses a preparation method and application of a needle trap microextraction device (NTED) with a novel graphene oxide-based composite material GrO and MIL-101 (Cr) as a coating. The preparation method mainly comprises the following steps: preparing GrO-coated MIL-101 (Cr); preparing a sol-gel solution; inserting the treated fiber into a sol-gel solution, drawing out the fiber, immersing the fiber into GrO-coated MIL-101 (Cr) powder, repeating for multiple times to prepare GrO-coated MIL-101 (Cr) coating fiber, fixing the GrO-coated MIL-101 (Cr) coating fiber into a 21G stainless steel needle to obtain a needle trap microextraction device, and combining with gas chromatography to realize extraction analysis of trace polychlorinated biphenyl (PCBs) in a water sample.

The invention discloses an Escherichia coli DH5alpha-A strain and a method for degrading polychlorinated biphenyl by using the Escherichia coli DH5alpha-A strain, and relates to application of the Escherichia coli strain DH5alpha-A with the preservation number of CCTCC (China Center For Type Culture Collection) NO: M20242004 in degradation of the polychlorinated biphenyl, in particular to application of the Escherichia coli strain DH5alpha-A in degradation of the polychlorinated biphenyl and application of the Escherichia coli strain DH5alpha-A in degradation of the polychlorinated biphenyl. The polychlorinated biphenyl is a biphenyl compound with the chlorine number larger than or equal to 3 and comprises 2, 2 ', 3, 3'-tetrachlorobiphenyl or trichlorobiphenyl; the method for degrading the polychlorinated biphenyl comprises the following steps: inoculating the Escherichia coli strain DH5 alpha-A in the claim 1 into a culture medium containing the polychlorinated biphenyl for culturing, and taking the polychlorinated biphenyl as a unique or main carbon source in the culture medium. In the invention, the Escherichia coli DH5 alpha-A is successfully separated and identified by directionally screening and enriching the polluted soil around a polychlorinated biphenyl production enterprise. Compared with the conventional Escherichia coli, the Escherichia coli has a remarkable difference in polychlorinated biphenyl degradation capability.

The present disclosure provides a method for promoting degradation of polychlorinated biphenyls (PCBs) by Pseudomonas JD37 with nanoscale zero-valent iron (nZVI) and use thereof. The method includes the following steps: adding nZVI and Pseudomonas JD37 in an environment having PCBs, and promoting degradation of the PCBs by the Pseudomonas JD37 with the nZVI. The nZVI increases an active oxygen content produced by extracellular metabolism of the Pseudomonas JD37, thus promoting degradation of the PCBs. Therefore, the method of the present disclosure is suitable for degrading the PCBs in water and soil for environmental restoration.

The issue of the present invention is to provide a disazo pigment in which the polychlorinated biphenyl (PCB) content in addition to the primary aromatic amine (PAA) content is reduced. The present invention provides a pigment composition containing a disazo pigment, an alkylamine that has an alkyl group having a carbon number of 8 or more, and a poly(oxyethylene) alkyl ester that has an alkyl group having a carbon number of 8 or more. Preferably, the disazo pigment includes at least one disazo pigment selected from a group consisting of C.I. Pigment Yellow 83, C.I. Pigment Yellow 13, and C.I. Pigment Yellow 14.

The invention discloses a dioxin purification analysis device for flue gas online detection and a purification detection method, and belongs to the technical field of pollutant treatment. The dioxin purification analysis device comprises a solvent bottle, a high-pressure pump, a six-way valve, an LC liquid phase column, a switching valve, a concentration device, a PTV large-volume sample injection instrument and a GC-ECD or GC / MS instrument, a pyrenyl ethyl (PYE) column is selected as a liquid chromatography stationary phase, and the dioxin purification analysis device is obtained by utilizing the planarity difference of an annular closed conjugated system formed by pi electrons in aromatic and alicyclic structures. According to the method, dioxin and polychlorinated aromatic hydrocarbon (polychlorinated biphenyl, hexachlorobenzene and tetrachloronaphthalene) are separated, and meanwhile, liquid phase effluent is transferred to a GC-ECD or GC / MS instrument by utilizing a concentration device and large-volume sample introduction for final analysis. The device integrates sample purification and detection technologies, and realizes the whole process of automatic purification and analysis of the flue gas sample.