263 results about "Perfluoro compound" patented technology

The invention relates to the technical field of organic chemistry and environmental science, in particular to a fluorine-philic and hydrophobic functional monomer, a synthesis method and application thereof, a fluorine-containing compound detection electrode based on the functional monomer and a preparation method of the fluorine-containing compound detection electrode. The chemical structure of the fluorine-philic and hydrophobic functional monomer comprises pyrrole-3-carboxylic acid and fluorine telomer alcohol bonded with the pyrrole-3-carboxylic acid. A long fluorocarbon chain is introduced into a basic functional monomer, so that the fluorine affinity and hydrophobicity of the monomer to a fluorine-containing compound are remarkably improved. Therefore, a derivative pyrrole-3-carboxylic acid of pyrrole is used as a basic functional monomer, and the fluorine telomeric alcohol is bonded on the pyrrole-3-carboxylic acid, so that a novel functional monomer with fluorine-philic and hydrophobic functions is synthesized. The functional monomer realizes specific capture of fluorine-containing organic matter molecules by simultaneously utilizing amido with affinity to perfluorinated compounds in a pyrrole ring and unique fluorine-fluorine interaction force. A perfluorinated compound detection method established based on the functional monomer can avoid interference caused by a sample matrix.

The invention is applicable to the technical field of perfluorinated compound removal, and provides an adsorption-coagulant for removing perfluorinated compounds in water and application thereof, the adsorption-coagulant comprises an adsorbent and a coagulant, the adsorbent adopts activated carbon powder, and the coagulant adopts polyaluminum chloride. The adsorbent adopted by the invention can efficiently capture trace perfluoroalkyl molecules in water, and the coagulant can promote the molecules to form larger aggregates in water, so that the overall removal efficiency is improved. By reasonably designing the adsorption-coagulation process, the use amount of a traditional coagulant can be reduced, the generation of byproducts in the treatment process is reduced, and the subsequent treatment cost is reduced, so that the economical efficiency and sustainability of the whole treatment process are improved. The adsorption-coagulation technology disclosed by the invention combines two water treatment methods of adsorption and coagulation, the removal efficiency of nondegradable pollutants such as perfluorinated compounds is remarkably improved through the combined action of the two methods, and the adsorption-coagulation technology shows wide applicability.

The invention provides a soybean protein nanoparticle coagulant for removing perfluorinated compounds in water as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing N, N-dimethyl hexadecylamine and epoxy chloropropane into a reaction precursor, namely epoxy propyl hexadecyl dimethyl ammonium chloride; meanwhile, hydrolyzing the soybean protein isolate by using protease to obtain a hydrolyzed soybean protein solution; enabling the epoxy group on the epoxy propyl hexadecyl dimethyl ammonium chloride and the amino group on the hydrolyzed soybean protein to be subjected to ring-opening addition reaction so as to be grafted to the hydrolyzed soybean protein, and adding acetone to generate precipitate after the reaction is finished; and collecting the precipitate, washing and drying to obtain the soybean protein nanoparticle coagulant for removing the perfluorinated compounds in the water. The soybean protein nanoparticle coagulant prepared by the invention utilizes strong electrostatic interaction and hydrophobic interaction, the removal capacity and selectivity of the soybean protein nanoparticle coagulant on PFAS are far higher than those of a traditional coagulant, and the soybean protein nanoparticle coagulant has excellent removal efficiency and remarkable anti-interference capability.

A water treatment apparatus for decomposing a perfluorinated compound on the basis of vacuum ultraviolet rays, according to the present invention, connects a plurality of water treatment pipes each having a vacuum ultraviolet irradiation device in series, so as to sequentially perform oxidation treatment, reduction treatment, and oxidation treatment while water to be treated sequentially passes through the water treatment pipes, thereby being capable of decomposing, among perfluorinated compounds in the water to be treated, fluorotelomers in which carbon (C) and hydrogen (H) are combined as well as perfluoroalkyls in which carbon (C) and fluorine (F) are combined, and bonds between carbon (C) and hydrogen (H) and bonds between carbon (C) and fluorine (F) can both be decomposed in decomposition products additionally generated during oxidation or reduction treatment reactions, and accordingly, through a series of processes, water treatment efficiency can be improved.

The invention discloses a perfluorinated compound adsorption material and a preparation method thereof. Comprising the following steps: 1) placing moso bamboo in a high-temperature carbonization furnace for carbonization treatment, after carbonization is completed, taking out bamboo charcoal, carrying out acid treatment to remove surface impurities and part of ash, then repeatedly washing the bamboo charcoal with deionized water until the bamboo charcoal is neutral, and finally drying the bamboo charcoal to obtain pretreated bamboo charcoal; and 2) putting the pretreated bamboo charcoal into a chitosan acetic acid solution to load chitosan on the surface of the bamboo charcoal, repeatedly washing the bamboo charcoal with deionized water to remove unloaded chitosan, and then drying to obtain the perfluorinated compound adsorption material. The prepared adsorption material has high adsorption capacity and selectivity on perfluorinated compounds, the adsorption performance of the adsorption material on the perfluorinated compounds is improved by modifying the bamboo charcoal, and the adsorption capacities of the adsorption material on perfluorooctanoic acid and perfluorooctane sulfonic acid can reach 400 mg / g and 450 mg / g respectively.

The invention provides a method for simultaneously detecting perfluorinated compounds in mouse tissues and organs, and belongs to the technical field of analysis and detection. The method provided by the invention comprises the following steps: mixing a mouse visceral organ tissue sample, an alkaline buffer solution and an internal standard solution, and homogenizing to obtain homogenate; mixing the homogenate with tetrabutylammonium hydrogen sulfate and methyl tert-butyl ether, and carrying out liquid-liquid extraction to obtain extract liquor; and sequentially drying and redissolving the extract liquor, and carrying out ultra-high performance liquid chromatography-tandem mass spectrometry analysis to obtain a result of the perfluorinated compound in the mouse tissue visceral organs. The result of the embodiment shows that the adding standard recovery rate of 14 target objects in the method provided by the invention is 64.9%-120.3%, the RSD of 6 repeated tests is 1.0%-14.0%, the matrix effect of the target objects is 83.7%-134.0%, and the matrix effect is relatively low; and the detection result has excellent accuracy and reproducibility.

The invention discloses a protein-based adsorbent capable of efficiently adsorbing perfluorinated compounds and application of the protein-based adsorbent. The adsorbent is obtained by coating polyethyleneimine in a phase transition aggregate formed by unfolding protein through a disulfide bond reducing agent. The use method of the adsorbent comprises the step of feeding the adsorbent into a solution containing the perfluorinated compound to realize efficient adsorption of the perfluorinated compound. The adsorbent has the advantages of being low in cost, efficient, easy to operate, environmentally friendly, free of secondary pollution, good in biocompatibility and the like, efficient selective adsorption of perfluorinated compounds can be achieved through the adsorbent, the adsorbent can be repeatedly used, and industrial application and popularization are easy.

The invention discloses a polymer microextraction column for in-situ growth of a metal organic framework material (MOF), which is prepared by the following steps: firstly preparing a polymer monolithic column matrix with rich metal oxide nanoparticles on the surface, and then introducing an organic linking agent solution into the monolithic column to realize self-assembly of the metal oxide and the organic linking agent on the surface of the polymer. And thus, the hybrid polymer micro-extraction column for MOF in-situ growth is obtained. The polymer micro-extraction column prepared by the invention combines the advantages of the flexible porous polymer and the rigid MOF, and has continuous large through holes and micro-mesopores with abundant acting sites; meanwhile, the microextraction column material is rich in fluorine atoms and open metal sites, can provide hydrogen bonds, F-F affinity, Lewis acid / alkali complexation and the like, has a specific enrichment effect on persistent organic fluorine pollutants such as perfluorinated compounds and fluorine aromatic hydrocarbon compounds, and has a very good application prospect in the aspect of pretreatment of environment and biological samples.

The invention relates to the technical field of perfluorinated compound detection, and discloses a method for full-automatic on-line rapid detection of perfluorinated compounds in water, which comprises the following steps: pretreating a water sample to obtain a sample to be detected, and placing the sample to be detected in a sample introduction disc of an on-line solid-phase extraction device; full-automatic online solid-phase extraction (Online SPE) enrichment and purification: automatically enriching and purifying the to-be-detected liquid in the step 1 by utilizing the Online SPE through an online solid-phase extraction small column, realizing alternate sample injection of double columns through valve switching, washing the other column during sample loading of one column, eluting a target object, and performing UPLC-MS / MS analysis. On the basis of a full-automatic on-line solid phase extraction-high performance liquid chromatography-tandem mass spectrometry technology, the method for full-automatic on-line rapid detection of the perfluorinated compounds in the water is successfully established in combination with an iRefx rapid screening intelligent working process, and the perfluorinated compounds in the water can be rapidly detected in a full-automatic on-line mode through the Online SPE and the iRefx rapid screening intelligent working process. Automatic sample injection, online enrichment and purification, intelligent judgment of sample concentration, overlimit sample redetection and accurate quantitative analysis are realized, and the detection efficiency is remarkably improved.

The invention discloses preparation of a functionalized GO membrane electrode and application of the functionalized GO membrane electrode in removal of perfluorinated compounds through coupled alternating current catalysis, and the preparation method of the functionalized GO membrane electrode comprises the following steps: performing ultrasonic treatment on a graphene oxide dispersion liquid, adjusting the pH value to be alkaline, adding a functional reagent 1 which is a low-valence titanium oxide or a high-conductivity CNTs material, performing hydrothermal reduction reaction after uniform ultrasonic treatment, and obtaining the functionalized GO membrane electrode. A functional reagent 2 is added into the obtained dispersion liquid, the functional reagent 2 is a compound with imino groups or quaternary ammonium salt, the reaction liquid obtained after the reaction is subjected to suction filtration through a vacuum suction filtration method to a micro-filtration membrane serving as a support, and the functionalized GO membrane electrode is obtained. The functionalized GO membrane electrode prepared by the method disclosed by the invention is applied to an alternating-current electrochemical system, no medicament needs to be added, and the process is simple, economical and environment-friendly. The electrode material is good in stability and high in conductivity, a large number of active species are provided for the catalytic degradation process, degradation products are low in toxicity, and degradation of perfluorinated compounds can be rapidly and efficiently achieved.

This invention discloses a Fe-GC@Fe 0 This invention relates to catalysts, their preparation methods, and applications, belonging to the field of water treatment technology. The preparation method of this invention is simple, requires minimal equipment, and yields Fe-GC@Fe catalysts. 0 The catalyst can drive microorganisms in water to metabolize perfluorinated compounds. Under conditions without external energy input, it can effectively remove perfluorinated compounds such as perfluorooctanoic acid, perfluorooctane sulfonic acid, perfluorononanoic acid, and perfluorohexane sulfonic acid from water. The removal rate and defluorination rate both reach more than 80%. Moreover, it is a solid catalyst, which is easy to separate from water, recycle and reuse, and maintain a high removal effect.

The invention discloses a device and a method for degrading perfluorinated compounds based on photocatalysis and electrochemistry synergy. The device comprises a reaction tank and a light source, wherein a photocatalysis unit and an electrochemical unit are arranged in the reaction tank; the photocatalysis unit comprises a conductive substrate and a photocatalysis layer, the photocatalysis layer is loaded on the conductive substrate, and the material of the photocatalysis layer is TiO2 / g-C3N4 heterojunction; the electrochemical unit comprises an anode, a cathode and a direct-current power supply, and the anode is electrically connected with the conductive substrate. When the scheme is implemented, electrons generated by the photocatalytic unit are migrated to the anode through the conductive substrate and participate in an electrochemical oxidation reaction, so that the carrier recombination rate is reduced, and meanwhile, the degradation rate of PFCs is increased; the electrochemical unit runs at low voltage (1-5V), external electric energy input is reduced by utilizing photo-induced electrons, and compared with a traditional electrochemical method, energy is saved; pFCs with different concentrations and types can be treated by adjusting the wavelength and voltage of the light source.

The invention discloses preparation of a two-dimensional piezoelectric semiconductor doped piezoelectric polymer material and application of the two-dimensional piezoelectric semiconductor doped piezoelectric polymer material to degradation of perfluorinated compounds, a method comprises the steps that a simple physical method is used for doping a two-dimensional piezoelectric semiconductor into a piezoelectric polymer to enhance electron transfer in a polymer matrix, and the synthesis method is simple. Piezoelectric catalysis is driven by ultrasonic mechanical force to realize degradation of perfluorinated compound pollutants in water. The two-dimensional piezoelectric semiconductor doped piezoelectric polymer material prepared by the method has relatively high catalytic activity, shows excellent degradation capacity on perfluorinated compound pollutants (perfluorooctanoic acid, perfluorooctanoic acid, perfluorodecyl acid and perfluorododecyl carboxylic acid), is low in energy consumption and easy to recycle, and avoids secondary pollution.

The invention discloses a three-dimensional porous carbon material, a preparation method and application in adsorption of organic pollutants in a water body, and belongs to the technical field of water treatment.The preparation method comprises the steps that 1, zinc salt, 2-methylimidazole and a nitrogen source are dissolved in a methanol solution respectively, stirring reaction is conducted at the room temperature after mixing, standing is conducted, precipitates are taken, and a precursor solution is obtained; a precursor zeolite imidazate framework structure material is obtained; and 2, pyrolyzing the precursor zeolite imidazate skeleton structure material at 1100 DEG C under the protection of inert gas to obtain the three-dimensional porous carbon material. The three-dimensional porous carbon material disclosed by the invention has the advantages of large specific surface area, developed pore structure, abundant nitrogen-containing functional groups and reusability, can provide more adsorption active sites and enhance the electrostatic adsorption effect, and shows excellent adsorption performance and anti-interference capability on perfluorinated compounds, benzene series (such as benzene) and chlorinated organic compounds (such as parachloroaniline).

The invention discloses a perfluorinated compound defluorination method using layered bimetallic oxide or hydroxide, and belongs to the technical field of defluorination methods. The perfluorinated compound defluorination method using the layered bimetal oxide comprises the following steps: adding the layered bimetal oxide into a solution of a perfluorinated compound, and carrying out hydrothermal reaction at 160-220 DEG C for 30-120 minutes. The defluorination method disclosed by the invention has an excellent perfluorinated compound defluorination effect, mild treatment conditions and a simple treatment process, and meanwhile, a complicated post-treatment procedure is omitted.

The invention relates to a method for detecting perfluorinated compounds in water, which comprises the following steps: carrying out solid-liquid separation on a water sample to prepare a liquid to be detected; carrying out on-line solid phase extraction-liquid chromatography-mass spectrometry detection on the to-be-detected liquid, and calculating the content of the perfluorinated compounds in the to-be-detected liquid by an internal standard method. The detection method is high in automation degree, simple and rapid to operate and capable of accurately detecting the perfluorinated compounds in the water.

The invention discloses a preparation method and application of an aminated MIL-101 (Cr) material for enhancing adsorption of perfluorinated compounds, relates to the technical field of metal organic framework materials, and aims to enhance the adsorption effect of the aminated MIL-101 (Cr) material on the perfluorinated compounds. The preparation method comprises the following steps: taking MIL-101 (Cr) as a skeleton raw material and tris (2-aminoethyl) amine as an amination raw material, and then synthesizing and modifying to prepare the MIL-101 (Cr)-TAEA, the average pore size of which can be more than 7 times of that of the MIL-101 (Cr); the MIL-101 (Cr)-TAEA can be applied to removal of perfluorinated compounds in water, and after four times of cyclic regeneration, the total removal rate of PFASs is reduced by less than 5% compared with that of first adsorption; the preparation steps are simple and easy to operate, the raw materials are easy to obtain, the preparation cost is low, the average pore size of the prepared aminated MIL-101 (Cr) material is greatly increased, the flexibility of the material is enhanced, the adsorption performance on perfluorinated compounds is good, the saturation adsorption capacity is high, and the cyclic regeneration performance of the material is excellent.

The invention discloses a synergistic advanced treatment system and method for perfluorinated compounds and conventional pollutants in dyeing and finishing wastewater, and the method comprises the following steps: firstly, the dyeing and finishing wastewater passes through a reaction tank filled with an adsorbent, so that the perfluorinated compounds and the conventional pollutants are adsorbed and enriched to obtain effluent which can meet the wastewater discharge standard; introducing a desorption agent into the adsorbent which is saturated by adsorption to obtain a high-concentration desorption solution which is rich in perfluorinated compounds and conventional pollutants, and carrying out oxidation reaction on the high-concentration desorption solution under a subcritical condition to thoroughly degrade organic matters, according to the process, adsorption enrichment and subcritical water oxidation ultimate treatment are innovatively coupled through a desorption link, the fundamental defects that treatment of low-concentration wastewater through subcritical water oxidation is not economical and only pollutants are transferred but not thoroughly eliminated in an adsorption technology are overcome, and meanwhile efficient integration of materials and energy is achieved.

The invention discloses a Fe-GL-Fe < 0 > catalyst and a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method is simple, the requirement for equipment is low, the prepared Fe-GL-Fe < 0 > catalyst can effectively remove perfluorinated compounds such as perfluorooctanoic acid, perfluorooctane sulfonic acid, perfluorononanoic acid and perfluorooctane sulfonic acid in water under the environment atmosphere condition without external energy input, and the removal rate and the defluorination rate are both larger than 95%; the catalyst belongs to a solid catalyst, is convenient to separate from water, is recycled, keeps a high removal effect, and is low in metal ion dissolution rate.

The invention discloses a method for detecting multiple perfluorinated compounds in a water environment. The method comprises the steps of sample collection and preservation, sample pretreatment and LC-MS / MS detection. According to the invention, trace detection is carried out on common perfluorinated compounds in a water environment by adopting solid-phase extraction-liquid chromatography-electrospray-tandem triple quadrupole mass spectrometer, a more perfect and comprehensive LC-MS / MS detection method for multi-medium concentration of perfluorinated compounds is provided, and on the premise that the recovery rate and the accuracy of a detection result are ensured, the detection efficiency is improved. The sample pretreatment modes in different media are optimized and adjusted, so that the experiment process is more convenient and faster, time and labor are saved, the use of traditional glass material consumables is avoided, and the experiment error is reduced; meanwhile, the method disclosed by the invention is wider in application range, can meet trace detection of perfluorinated compounds in surface water, underground water, domestic sewage, industrial wastewater, river sediment and residual sludge of a sewage plant, and provides data support for quality supervision and risk early warning in a water environment.

The invention belongs to the technical field of environmental governance, and particularly relates to preparation of cerium-doped surface modified activated carbon and application of the cerium-doped surface modified activated carbon in adsorption of perfluorinated compounds. The preparation method comprises the following steps: dissolving cerium salt and citric acid in water to form a transparent solution, then adding NaOH and activated carbon (AC), and then sequentially carrying out hydrothermal reaction and calcination treatment to prepare the cerium-doped surface modified activated carbon. The modified activated carbon synthesized by adopting the method has efficient adsorption performance, and the specific surface area is remarkably increased, so that the contact area of an AC material and pollutants is increased, the adsorption performance and the adsorption efficiency of the material are greatly improved, perfluorinated compounds in water can be efficiently removed, and the modified activated carbon is particularly suitable for treating various types of high-concentration wastewater and has a wide application prospect. And multiple requirements on high efficiency, economy and environmental protection in the field of wastewater treatment can be met.

The invention provides application of a modified adsorption material in removal of perfluorinated compounds and a preparation method of the modified adsorption material. According to the method, the to-be-treated water body containing the perfluorinated compound is mixed with the modified adsorption material, and the obtained mixed to-be-treated water body is treated by regulating and controlling reaction conditions, so that PFAS is removed, and the purified water body is obtained. The method disclosed by the invention is a process for treating PFAS based on layered bimetallic hydroxide efficient adsorption, and the method is relatively low in energy consumption and relatively low in process treatment cost; wherein the layered bimetal hydroxide material is a modified layered bimetal hydroxide material, the PFAS treatment capacity is remarkably improved, and the layered bimetal hydroxide material has a good application prospect in the field of wastewater treatment.

The invention relates to the technical field of environmental remediation, in particular to an in-situ soil perfluorinated compound remediation method and system.The method comprises the following steps that electrochemical targeted enrichment is conducted, applying a pulse type direct-current electric field to the anode and the cathode to drive anionic PFAS in the soil to migrate and enrich towards an anode area; in the anode area, the temperature of anode soil is increased, composite peroxide and a chemical activator are continuously injected, and perfluorinated compounds enriched in the anode are oxidized and degraded; and microbial polishing and ecological restoration: stopping the electric field, carrying out post-treatment on the anode region, adding a microbial agent and a nutritional agent into the anode region, and carrying out biodegradation on residual perfluorinated compounds or degradation intermediate products thereof. Through systematic design of physical field guidance, targeted energy injection, multiple catalytic oxidation and ecological function reconstruction, in-situ soil treatment is achieved, and the core problem in PFAS in-situ remediation is precisely solved.

The invention discloses a method for separating and enriching 24 perfluorinated compounds in a water environment. The method comprises the following steps: collecting a to-be-detected water sample, filtering, and adding an isotope labeled recovery rate indicator to obtain a pretreated water sample; activating a PWAX solid-phase extraction column by using a 0.1% ammonia water methanol solution, methanol and ultrapure water in sequence, and enriching a water sample through the column; leaching the PWAX solid-phase extraction column with a 25 mM ammonium acetate aqueous solution (pH = 4) to remove water-soluble interference impurities; carrying out vacuum freeze drying on the solid-phase extraction column, and eluting with methanol and 0.1% ammonia water methanol solution; and blowing the collected eluent to 200 L under nitrogen flow, adding 1: 1 methanol and aqueous solution into the obtained residue, redissolving to 1.00 mL, filtering with a filter membrane, and putting into a polypropylene sample injection bottle to complete separation and enrichment. The method disclosed by the invention is simple and convenient to operate, can enrich various types of perfluorinated compounds (including carboxylic acids, sulfonic acids, fluorosulfonic acids and the like) in water, and is wide in application range and relatively high in accuracy.

The invention relates to a fluorine-based three-dimensional covalent organic framework material as well as a preparation method and application thereof, and belongs to the technical field of covalent organic framework materials. Under the action of a catalyst, a first monomer (the first monomer is selected from a regular tetrahedron-containing amino monomer or a regular tetrahedron-containing aldehyde group monomer) and a second monomer (the second monomer is selected from a fluorine-containing aldehyde group monomer or a fluorine-containing amino monomer) are subjected to a condensation reaction in an organic solvent to obtain the fluorine-based three-dimensional covalent organic framework material. The method comprises the following steps of: preparing a solid-phase microextraction probe by taking the perfluorinated compound as an adsorbent through in-situ growth on the surface of a probe matrix, and then combining the solid-phase microextraction probe with an open-type mass spectrum to detect trace perfluorinated compounds in a complex matrix. The fluorine-based three-dimensional covalent organic framework material disclosed by the invention is good in chemical stability and high in hydrophobicity, has a good adsorption effect on perfluorinated compounds, and is high in repeated utilization rate.

The invention provides an efficient and recyclable electro-adsorption method for removing perfluorinated compounds in water and an electrode material by taking the most widely distributed perfluorinated butanesulfonic acid in the perfluorinated compounds as a target. Chitosan and magnetic nano ferroferric oxide are selected as raw materials for modifying activated carbon to prepare a nano Fe3O4 / chitosan / activated carbon composite electrode, the nano Fe3O4 / chitosan / activated carbon composite electrode is used as an anode, activated carbon is used as a cathode, 0.8-5V working voltage is applied, and the composite electrode is used for electro-adsorption and desorption of perfluorinated compounds in water. Therefore, on-line adsorption, desorption and concentration of the perfluorinated compounds are realized, and the purposes of controllable and efficient removal, enrichment and recovery of the perfluorinated compounds are achieved.

The invention discloses a coating composition as well as a preparation method and application thereof. Belongs to the technical field of coatings. The coating composition comprises silicon-fluorine resin, a silane coupling agent and a solvent, the silicon-fluorine resin is prepared from the following raw materials: fluorosilane modified nano silica sol, fluorosilicone oil and a perfluorinated compound. The silicon-fluorine resin prepared by taking the fluorosilane modified nano silica sol, the fluorosilicone oil and the perfluorinated compound as raw materials is matched with the silane coupling agent and the solvent to form the coating, and a coating layer formed by the coating has the effects of high temperature resistance, wear resistance and easiness in cleaning.

The present invention relates to a treatment process for mining sludge and sewage, and belongs to the technical field of mining sludge and sewage treatment. A treatment process for mining sludge and sewage treats mining sludge and sewage through a treatment system, wherein the treatment system comprises a water distribution tank, a reaction tank and a sedimentation tank connected in sequence, the reaction tank is used to add a flocculant for flocculation reaction, wherein the flocculant is made of activated carbon as a raw material, metal oxides are generated on its surface to form composite particles, and then modified with cardanol and aminothiophenol. The treatment system for mining sludge and sewage of the present invention comprises a water distribution tank, a reaction tank and a sedimentation tank, which helps to improve the treatment efficiency, and also helps to protect the environment and ensure the stable operation of the mine water treatment system. The flocculant prepared by the scheme of the present invention adsorbs perfluorinated compounds through hydrophobic effect, hydrogen bond, ion exchange and electrostatic interaction, and has an excellent removal effect on them.

The invention belongs to the field of electroanalytical chemistry / electrochemical sensors, and discloses preparation and application of a molecularly imprinted sensitive membrane modified electrode for perfluorooctane sulfonic acid detection. According to the method, aniline and o-fluoroaniline are selected as bifunctional monomers, PFOS is taken as a template molecule, in-situ electropolymerization is carried out through cyclic voltammetry, and the molecularly imprinted sensitive membrane capable of specifically recognizing PFOS is obtained. According to the invention, o-fluoroaniline is introduced and is combined with a fluorocarbon chain of PFOS through F-F interaction, and due to the existence of fluorine atoms, non-specific combination can be reduced, so that the anti-interference capability of the molecularly imprinted sensitive membrane is stronger, and the selective limitation on a perfluorinated compound composed of a sulfonic acid group and the fluorocarbon chain is reduced; according to the invention, aniline is used as another functional monomer, so that the conductivity can be improved, and the aniline and o-fluoroaniline can be doped and electrically polymerized to form fluorinated polyaniline. And the chemical property of the fluorinated polyaniline is relatively stable, so that the stability of the eluted molecularly imprinted cavity is relatively high.

The invention relates to a method for improving resistance of a denitrification strain to a new pollutant perfluorinated compound, and belongs to the field of biological denitrification of sewage. The method comprises the following steps: under an aerobic condition, culturing a denitrification strain by using a sterilized TSB culture medium to obtain OD600 = 1.8; resuspending with a sterile PBS buffer solution to obtain a bacterial suspension; (2) preparing a synchronous nitrification and denitrification culture medium, and sterilizing for later use; (3) respectively adding a perfluorinated compound into the synchronous nitrification and denitrification culture medium, and respectively inoculating the bacterial suspension in the step (1) into the synchronous nitrification and denitrification culture medium containing the perfluorinated compound according to the inoculum size of 1% (v / v); and (4) placing the inoculated synchronous nitrification and denitrification culture medium in an aerobic environment, culturing for 2 hours in a shaking table at the temperature of 30 DEG C and the rotating speed of 150rpm, and carrying out weak ultrasonic treatment on the strain by using an ultrasonic generator. According to the method, the denitrification strain is treated by weak ultrasound, so that the inhibition effect of the perfluorinated compound on the denitrification strain is slowed down, and the resistance of the denitrification strain on the perfluorinated compound is improved.