67 results about "Trace pollutants" patented technology

The invention discloses a recovery treatment process of heavy metal production wastewater, and relates to the technical field of wastewater treatment. Adjusting the pH value of the wastewater through pretreatment and stirring; 5%-10% of nanometer seed crystals are added in the seed crystal reinforced vulcanization process, a vulcanizing agent is controllably added, and large-particle-size precipitates are generated through pulse stirring; magnetic field separation is performed after magnetic microsphere adsorption; carrying out selective adsorption and acid regeneration on the chitosan-based magnetic resin; micro pollutants are removed through cooperation of the three-dimensional electrode and photocatalysis; concentrating 10-20 times by membrane distillation to enrich heavy metals; metal simple substances with the purity larger than or equal to 99.5% are recycled through pulse electrodeposition; and after deep treatment, the wastewater reaches the standard to be discharged or recycled (the recycling rate is greater than or equal to 70%). The process innovation comprises the steps of enhancing the seed crystal to improve the vulcanization efficiency by 30%, realizing rapid separation by a magnetic material, reducing the energy consumption by 40% by a three-dimensional electrode coupling membrane method, and constructing a vulcanizing agent regeneration (the regeneration rate is greater than or equal to 85%) and heavy metal closed-loop recovery system. Compared with a traditional process, the heavy metal removal rate is larger than or equal to 99.8%, the treatment cost of each ton of water is reduced by 25%-30%, and the method has the advantages of high efficiency, low consumption, environmental protection and recycling and is suitable for multi-metal complex wastewater.

The invention discloses an intelligent water quality monitoring and pollution source identification method based on full spectrum analysis, and relates to the technical field of environmental monitoring optical sensing, and the method comprises the following steps: carrying out dynamic background stripping on a water body pollution metadata set to obtain a dynamic background spectrum, and building a spectrum purification model to carry out characteristic purification on the dynamic background spectrum to obtain a water body pollution data set; generating a pollution characteristic spectrum; performing multi-dimensional feature aggregation and hydraulic drive topology reconstruction on the pollution feature spectrum to generate a watershed pollution dynamic propagation relationship network diagram; performing physically constrained space-time convolution and propagation inversion on the watershed pollution dynamic propagation relationship network diagram to generate a pollution source probability distribution thermodynamic diagram; and carrying out responsibility association mapping on space anchor point coordinates of the pollution characteristic spectrum and pollution source center positioning of the pollution source probability distribution thermodynamic diagram, and generating a visual traceability report. Through dynamic background stripping and feature purification, high-fidelity extraction of pollution features under a complex optical background is realized, and the detectability of trace pollutants is remarkably improved.

The invention relates to the technical field of degradation-resistant organic wastewater treatment, in particular to a cathode and anode type electro-Fenton coupling wastewater treatment device and method.The cathode and anode type electro-Fenton coupling wastewater treatment method comprises the steps that a titanium electrode or a BDD electrode is adopted in an anode module, 0.05-0.5 mol / L sulfate radical serves as electrolyte, and persulfate is electrically synthesized in situ; a cathode module is a porous carbon electrode, and # imgabs0 # is generated through aeration at the speed of 0.5 L / min to 2 L / min; the space between the cathode modules is filled with three-dimensional invasive plant source biochar catalytic particle electrodes, the H-type double-chamber electrolytic tank separates a cathode chamber and an anode chamber through a proton membrane, and the method comprises an intermittent type (firstly adsorbing trace pollutants and then oxidizing, and biochar is renewable) and a continuous type (synchronously adsorbing and degrading high-concentration wastewater, and pretreating to improve biodegradability). The device realizes the cooperation of adsorption and electrocatalytic oxidation, efficiently treats refractory wastewater, promotes the recycling of invasive plants, and has both environmental protection and economic values.

The invention discloses an electrochemical biosensor of a light-driven nanopore channel and application of the electrochemical biosensor. According to the sensor, a photoresponse nanopore membrane is constructed, an outer surface aptamer probe is combined, asymmetric photothermal gradient driven ion transmission induced by near-infrared light is utilized, and ultra-sensitive detection on a target object is realized by regulating and controlling the charge density of the outer surface. According to the electrochemical biosensor provided by the invention, traditional voltage driving is replaced by asymmetric near-infrared light driving, so that the electrochemical biosensor has a relatively wide detection range and an extremely low detection limit, and high-sensitivity and specific detection on a target object can be realized. The electrochemical biosensor can be used for detecting microcystin-LR (MC-LR), the detection limit reaches 1 * 10 <-7 > mu g / L, the sensitivity is improved by 5 orders of magnitude compared with that of a traditional voltage-driven sensor, and the electrochemical biosensor can be applied to trace pollutant detection in the fields of environmental monitoring, food safety and the like.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and relates to a preparation method of an Ag-Fe3O4 composite SERS substrate and application of the Ag-Fe3O4 composite SERS substrate in monitoring trace pollutants in water. Based on a plasma-semiconductor synergistic enhancement mechanism, cubic Fe3O4 nano particles with exposed {100} crystal faces are synthesized through a hydrothermal method, and the cubic Fe3O4 nano particles and Ag nano particles are subjected to ultrasonic-stirring to construct the Schottky heterojunction. The substrate creatively realizes dual-channel enhancement: the local surface plasmon resonance effect of Ag nanoparticles generates electromagnetic enhancement, the narrow band gap of Fe3O4 promotes photo-induced electrons to be transferred to Ag, an interface electric field is formed, and the polarizability of adsorption molecules is remarkably increased. When the probe is applied to detection of trace pollutants in a water body, the probe molecule RB is anchored on the surface of Fe3O4 through carboxyl, and the HOMO energy level of the probe molecule RB and the valence band top of Fe3O4 generate resonance charge transfer, so that the Raman cross section is improved. The detection limit of RB under 0.25 mW laser is increased by several orders of magnitude compared with that of a single Ag substrate.

The invention provides a DNA enzyme triple-helix molecular switch detection system adaptive to a personal glucometer as well as a preparation method and application of the DNA enzyme triple-helix molecular switch detection system, and belongs to the technical field of biosensors. The DNA enzyme triple-helix molecular switch disclosed by the invention comprises an aptamer containing two nucleotide arm segments and DNA enzyme covalently coupled with a magnetic bead, two nucleotide arm segments of the aptamer and DNA enzyme form a triple helix structure; the two nucleotide arm segments comprise a nucleotide sequence SEQ ID NO.1 at the 5'end of the aptamer and a nucleotide sequence SEQ ID NO.2 at the 3 'end of the aptamer. According to the invention, the flexibility of an original aptamer is limited by using a terminal fixation strategy, the spatial conformation of the original aptamer is stabilized, the affinity of the aptamer to a target is improved, and the sensitivity of the aptamer to the target is improved by using a triple-helix molecular switch containing DNA enzyme and nano-enzyme-gold nanoparticles. Accurate and sensitive detection of trace pollutants in food is realized by measuring the reduction amplitude of the glucose concentration in the detection liquid through a household glucometer.

The invention belongs to the field of detection, and particularly relates to an electrochemical sensing platform for detecting lead ions and malathion as well as a preparation method and a detection method of the electrochemical sensing platform. The preparation method of the electrochemical sensing platform comprises the steps of designing a three-chain DNA compound, preparing a gold nanoparticle electrode, preparing the electrochemical sensing platform and the like. The electrochemical sensing platform realizes dual detection of lead ions (in a signal enhancement mode) and malathion (in a signal weakening mode) through specific recognition of DNAzyme and an aptamer on the basis of a three-chain DNA compound and a gold nanoparticle electrode. The method has the advantages of no label, high sensitivity (the detection limits respectively reach 5.42 pM and 0.34 pM), strong anti-interference capability and good stability, and is suitable for rapid detection of trace pollutants in environment and food samples.

The present application relates to the technical field of anode slime treatment, and discloses a method for removing antimony and tellurium from anode slime by multi-stage pressurization and chlorine-free process, which comprises the following steps: S1, anode slime pretreatment, S2, multi-stage pressurization treatment, S3, separation of antimony and tellurium from the anode slime, S4, preparation of sodium antimonate, S5, tail gas treatment, S6, waste liquid treatment, S7, post-treatment. The method is characterized by the following: one-stage pressurized thiourea transformation is used for deep copper removal, and two-stage pressurized sulfuration is used for chlorine-free antimony and tellurium removal. The process flow does not involve chlorine-containing substances, and the pressurized leaching of alkaline medium does not produce substances with strong corrosivity, thereby reducing the damage to the equipment. In the process of removing antimony and tellurium, the harmful substances generated during the reaction can be treated by waste gas and waste liquid treatment, and the by-products, precipitates, incompletely removed heavy metal ions, trace pollutants and the like in the tail liquid can be removed or converted into harmless substances, so that the tail liquid meets the discharge standard and the environmental pollution caused by the tail liquid discharge is reduced.

The application discloses a pollution source detection method and system based on water environment treatment, and relates to the technical field of intelligent detection, and comprises the following steps: emitting laser with a first Brillouin linewidth in combination with a distribution range; adjusting the first Brillouin linewidth based on feedback data of the laser; moving the coordinates of the pollution source based on a pollution diffusion model, a three-point positioning method and pollution parameters of a current detection point; and obtaining new coordinates of the pollution source. The application greatly improves positioning accuracy by detecting changes in trace pollution concentration and combining model inversion, does not need to be close to a pollution area, supports a closed-loop mechanism of detection and updating, can realize three-dimensional positioning by only using three detection points, does not need to densely arrange a sensor network, greatly reduces hardware cost and maintenance burden, is suitable for emergency and rapid deployment, and can maintain stable performance under complex conditions such as wind field changes, terrain undulations and water layering.

The present invention relates to a preparation method and application of a cyclodextrin - histidine / lanthanum complex, belonging to the technical field of fluorescence sensors. The preparation method includes: mixing a cyclodextrin - histidine fluorescent molecule with a lanthanum source in a solution and heating for reaction to obtain a cyclodextrin - histidine / lanthanum fluorescent complex; wherein, the preparation method of the cyclodextrin - histidine fluorescent molecule includes: mixing an aldehyde - group cyclodextrin and histidine in an aqueous solution for reaction to obtain; the aldehyde - group cyclodextrin is an aldehyde - group cyclodextrin obtained by pre - oxidizing β - cyclodextrin with sodium periodate. Compared with the prior art, the cyclodextrin - histidine / lanthanum complex prepared by the present invention can directly and highly specifically recognize phosphate ions, realizing highly sensitive detection of phosphate ions, being more suitable for accurate detection of trace pollutants at low concentrations and highly selective detection. In addition, portable detection of phosphate ions can be realized through a visualization technique based on fluorescence images.

The invention belongs to the technical field of reservoir ecological monitoring, and particularly relates to a reservoir ecological environment safety monitoring and early warning system based on an unmanned aerial vehicle, which comprises an autonomous motion control module, a jitter rule optimization module and a reservoir ecological monitoring module. According to the scheme, through the autonomous motion control module and the jitter rule optimization module, a PID controller is adopted to dynamically adjust the attitude of the unmanned aerial vehicle and sensor parameters, a BANet model is optimized to eliminate dynamic fuzziness, Kalman filtering is adopted to compensate high-frequency jitter, and multi-frame fusion is adopted to enhance and compensate low-frequency jitter. Stable acquisition of spectral data of the unmanned aerial vehicle in motion modes of target surrounding, tracking and the like is realized; through a reservoir ecological monitoring module, a random forest model and clustering fusion analysis are adopted, and a pollutant input path is traced through a historical spectrum difference index, so that automatic positioning of a pollution hot spot area and quantitative evaluation of a nutrition state are realized.

The invention discloses a method for tracing pollutants in a lake, which comprises the following steps of: (1) gridding a satellite map of the lake, and collecting pollutant characteristic signal data of a suspected pollution source and a lake background point water sample; (2) supplementing the suspected pollution source by using principal component analysis, a convex hull algorithm and clustering analysis according to a topological structure of the background point and the suspected pollution source; (3) labeling the suspected pollution source data set, establishing a random forest model, and performing classification training on the random forest model by using the suspected pollution source data set; (4) calculating the pollutant characteristic signal intensity of the whole lake area by using diffusion simulation inversion; and (5) normalizing the pollutant characteristic signal intensity of each coordinate position of the whole lake area, inputting the normalized pollutant characteristic signal intensity into the trained random forest model, calculating the influence ratio of each suspected pollution source on each coordinate position, and drawing a spatial distribution diagram of the influence ratio of each pollution source. The method provided by the invention is high in accuracy and small in required manpower and computing power.

The invention relates to a composite nanofiltration membrane and a preparation method thereof. The composite nanofiltration membrane comprises a supporting layer and an adsorption and degradation composite functional layer arranged on the supporting layer, the adsorption and degradation composite functional layer is prepared from a composite functional coating liquid, and the composite functional coating liquid comprises the following raw materials in parts by weight: 20-100 parts of an organic adsorbent; 5-25 parts of a porous material; 5-25 parts of a metal organic framework material; 5000 to 20000 parts of a solvent A; 5000 to 20000 parts of a solvent B; and 0.5-5 parts of a cross-linking agent. The solvent A comprises dimethyl sulfoxide, N-methyl pyrrolidone and an ethanol solution with the volume solubility of 75%; the solvent B is a 1% acetic acid solution; the membrane is large in water flux and high in rejection rate, can efficiently remove micropollutants such as bisphenol A and estradiol in water, has a self-cleaning function, can degrade the pollutants, avoids membrane hole blockage, and prolongs the service life of the membrane.

The present invention relates to the technical field of shield muck detection, and particularly relates to a method for identifying and detecting trace pollutants in shield muck, which comprises the following steps: Step S1. Pretreatment of shield muck, extraction with an anionic surfactant; Step S2. Avoidance of interfering components; Step S3. Detection of an anionic surfactant; Step S4. Calculation of the content of an anionic surfactant. The present invention directly uses fresh shield muck for extraction, avoiding the decomposition of anionic surfactants caused by high-temperature drying in traditional methods, significantly improving the accuracy of detection results. Moreover, by using a laboratory oscillator, 10-20 samples can be processed in batches at one time, simplifying the operation steps, reducing the consumption of reagents at the same time, effectively avoiding the problem of easy air leakage of separating funnels, improving the operation efficiency and the safety of experimental personnel, and can quickly and efficiently complete the extraction of anionic surfactants in soil, having broad application prospects.

The invention discloses a preparation method of PdO / alpha-MoO3 hollow microspheres and a gas sensitive element based on in-situ growth. The preparation method comprises the following steps: growing multilevel-structure PdO / alpha-MoO3 hollow microspheres with different PdO composite molar ratios on a ceramic tube in situ by adopting a solvothermal method; when the PdO / alpha-MoO3 composite material with the molar ratio of PdO being 2.5 at% has the best sensing performance to triethylamine gas, the response value of the material to 50ppm triethylamine gas is 122.1 at the optimal working temperature of 217 DEG C, the triethylamine gas as low as 0.1 ppm can be detected, the trace gas monitoring requirement is met, and the composite material is suitable for early warning or trace pollutant detection in a severe environment; the response speed is accelerated, the response time to the triethylamine gas is only 28.6 seconds, the gas concentration change can be captured in time, the real-time monitoring efficiency is improved, and the mechanism of the influence of the formation of the p-n heterostructure on the gas-sensitive performance is disclosed; in addition, the anti-interference capability is strong, and compared with interference gases such as aniline, acetone, ammonia gas and the like, the sensor has remarkable selectivity on triethylamine.

The invention discloses a pollution source detection method and system based on water environment treatment, and relates to the technical field of intelligent detection, and the method comprises the following steps: combining a distribution range, emitting laser with a first Brillouin line width, adjusting the first Brillouin line width based on the feedback data of the laser, and obtaining a first Brillouin line width and a second Brillouin line width; and based on the constructed pollutant diffusion model, the three-point positioning method and the pollutant parameters of the current detection point, moving the coordinates of the pollution source, and obtaining the coordinates of a new pollution source. By detecting the concentration change of the trace pollutants and combining model inversion, the positioning precision is greatly improved, a closed loop mechanism which does not need to approach a polluted area and supports detection and updating at the same time is supported, three-dimensional positioning can be realized only by three detection points, a sensor network does not need to be densely arranged, the hardware cost and the maintenance burden are greatly reduced, and the method is suitable for emergency rapid deployment. The stable performance can be kept under the complex conditions of wind field change, topographic relief, water layering and the like.

The embodiment of the invention provides a soil micro-pollutant enrichment device. The soil micro-pollutant enrichment device comprises a soil drilling mechanism, at least the lower portion of the columnar shell is open, and the soil drilling mechanism is arranged on the lower side of the columnar shell and comprises a power device and a rotary scraping plough. The rotary scraping plough comprises a central connecting body and a plurality of coulters; the central connector is connected with an output shaft of the power device; the coulters are connected with the central connector, are uniformly distributed in the circumferential direction and converge at the central position to form a pointed end; each coulter uniformly comprises a main cutter part; the main cutter part comprises a first front cutter surface which is obliquely arranged relative to a coulter rotating shaft, and a first rear cutter surface which is positioned at the bottom end of the coulter and is close to the first front cutter surface; when the power device drives the rotary scraping plough to rotate in the forward direction, a cutting edge formed by approaching the first front cutter face and the first rear cutter face scrapes and ploughs a soil layer on the lower side, and the scraped and ploughed soil enters the columnar containing cavity under the oblique pushing effect of the first front cutter face. And the cross section projection plane of the cylindrical shell is positioned in a rotary scraping working plane formed when the rotary scraping plough rotates.

The application provides a DNA enzyme triple helix molecular switch detection system suitable for a personal blood glucose meter, and a preparation method and application thereof, and belongs to the technical field of biosensors.The DNA enzyme triple helix molecular switch comprises an aptamer containing two nucleotide arm segments and DNA enzyme covalently coupled with a magnetic bead; the two nucleotide arm segments of the aptamer form a triple helix structure with the DNA enzyme; and the two nucleotide arm segments comprise a 5' end nucleotide sequence SEQ ID NO.1 of the aptamer and a 3' end nucleotide sequence SEQ ID NO.2 of the aptamer.The application uses a terminal fixation strategy to limit the flexibility of the original aptamer, stabilize the spatial conformation thereof, improve the affinity of the aptamer to the target, utilize the triple helix molecular switch containing the DNA enzyme and the nano-enzyme-gold nanoparticles, and realize accurate and sensitive detection of trace pollutants in food through determination of the reduction range of the glucose concentration in the detection liquid by using the household blood glucose meter.

The invention discloses a multi-medium drinking water purifying device and system based on layering, and belongs to the technical field of water treatment.The multi-medium drinking water purifying device comprises a tank body, an upper partition plate, a middle partition plate and a lower partition plate are sequentially arranged in the tank body from top to bottom, and a water purifying cavity is defined by the upper partition plate and the inner top of the tank body. Through the independent layered design and serial arrangement of the quartz sand filter cavity, the activated carbon filter cavity and the medical stone filter cavity, the gradient arrangement of the filler with the particle size gradually reduced from bottom to top is matched, and the water conveying direction from bottom to top is combined, so that the problem of filter material migration and mixing caused by water flow impact and backwashing of a traditional single-tank mixed filling filter material is structurally and thoroughly avoided; each filtering cavity independently has a specific filtering function, the quartz sand intercepts suspended matters, the activated carbon adsorbs organic matters and peculiar smell, the medical stone removes micro pollutants and mineralizes the micro pollutants, the filtering interface is clear and stable, an ideal reverse granularity filtering state is always maintained, the filtering period is effectively prolonged, the backwashing energy consumption is reduced, and the stability of the effluent quality is ensured.

The invention discloses a surface-enhanced Raman detection substrate for water pollutant detection and a preparation method thereof, a dendritic cluster structure formed by naturally drying nanogold sol on a hydrophobic carbon film is constructed, the dendritic cluster structure is transferred and fixed on a tin foil-glass slide substrate, and the dendritic nanogold structure forms dense hot spots through droplet self-assembly, so that the surface-enhanced Raman detection substrate for water pollutant detection is obtained. The local electromagnetic field enhancement effect is obviously improved, so that high sensitivity is obtained; meanwhile, the structure is spontaneously formed on the hydrophobic substrate, the process does not need complex equipment or accurate control, only natural drying is needed, the preparation process is greatly simplified, and the reproducibility between batches is improved; and finally, the structure is stably fixed on the glass slide through the ultraviolet curing adhesive, so that the structure does not fall off in the detection process, and the signal is stable. Therefore, on the premise of ensuring high detection sensitivity, simplicity and convenience of substrate preparation, structural stability and high reproducibility of a detection result are realized, and the method is particularly suitable for on-site rapid SERS detection of trace pollutants in a complex water body.

The utility model relates to the technical field of cleanliness detection, in particular to a device for detecting cleanliness on line based on an ultraviolet fluorescence method. The device for online detection of the cleanliness based on the ultraviolet fluorescence method comprises a measurement module; the measurement module comprises a light path module and a calibration module; the calibration module comprises a stepping motor, a standard sample bracket and a position detection sensor; the stepping motor is connected with the standard sample bracket and drives the standard sample bracket to rotate, and the standard sample bracket comprises a plurality of cleanliness sample bracket units and channels arranged among the cleanliness sample bracket units; and the position detection sensor is arranged on the standard sample bracket. The light path module carries out detection by adopting an ultraviolet fluorescence method, has high sensitivity to common pollutants such as oil stains and organic impurities on the metal plate strip, can accurately detect trace pollutants, and improves the precision of cleanliness detection.

Provided herein is a process for the removal of micropollutants and / or other pollutants from water, involving subjecting the water to a consecutive combination of biological adsorbent filtration (BAF) followed by oxidation treatment (OT), preferably ozone treatment. In a preferred embodiment, an adjustable amount of the OT effluent, preferably an adjustable amount ranging between 10-100%, more preferably 20-90%, more preferably 20-80%, most preferably 20-50% of the OT effluent, is recirculated to the BAF. The process may involve monitoring the formation of oxidation products at the end of the OT, and / or for measuring TOC, DOC, SUVA, ammonium and / or specifically targeted pollutants in or at the end of the BAF, and controlling the amount of BAF-OT treated water which is recirculated to the consecutive steps of BAF and OT based on the output of the monitoring step.

The invention discloses a four-electrode electrochemical detection system which comprises an anode, a cathode, a reference electrode I and a reference electrode II, when the four-electrode electrochemical detection system is applied to pollutant detection, the system is matched with [EMIM] [BF4] and PBS compounded electrolyte and three modes of static adsorption catalysis, dynamic electrochemical catalysis and pressurized photoelectric concerted catalysis, and high-selectivity detection of trace pollutants can be realized. Compared with a traditional three-electrode system, the three-electrode system has higher sensitivity, resolution ratio and anti-interference capability, and is suitable for the fields of environmental monitoring, food safety, emergency response and the like.

The embodiment of the invention provides a soil micro-pollutant enrichment device. The soil micro-pollutant enrichment device comprises a soil drilling mechanism, at least the lower portion of the columnar shell is open, and the soil drilling mechanism is arranged on the lower side of the columnar shell and comprises a power device and a rotary scraping plough. The rotary scraping plough comprises a central connecting body and a plurality of coulters; the central connector is connected with an output shaft of the power device; the coulters are connected with the central connector, are uniformly distributed in the circumferential direction and converge at the central position to form a pointed end; each coulter uniformly comprises a main cutter part; the main cutter part comprises a first front cutter surface which is obliquely arranged relative to a coulter rotating shaft, and a first rear cutter surface which is positioned at the bottom end of the coulter and is close to the first front cutter surface; when the power device drives the rotary scraping plough to rotate in the forward direction, a cutting edge formed by approaching the first front cutter face and the first rear cutter face scrapes and ploughs a soil layer on the lower side, and the scraped and ploughed soil enters the columnar containing cavity under the oblique pushing effect of the first front cutter face. And the cross section projection plane of the cylindrical shell is positioned in a rotary scraping working plane formed when the rotary scraping plough rotates.

The invention belongs to the technical field of reclaimed water advanced treatment, and particularly relates to a modified PVDF (polyvinylidene fluoride) tubular filter membrane and a reclaimed water advanced treatment filter system applying the modified PVDF tubular filter membrane, the modified PVDF tubular filter membrane comprises a purification tank, two-stage membrane filtration equipment, an adsorption filtration device and a disinfection PH (potential of hydrogen) regulation tank which are sequentially connected through a connecting pipeline, and the disinfection PH regulation tank is connected with a water outlet pipe; a pressure pump and a valve are arranged on each connecting pipeline, the PVDF tubular filter membrane comprises the following raw materials in percentage by mass: 16-18% of PVDF, 4-5% of calcined zeolite, 2-3% of calcined bentonite, 1-2% of calcined shale ultrafine powder and 72-75% of a solvent, and the solvent is one of NMP or DMF. According to the system, through multi-stage filtration, specifically, the modified PVDF tubular filtration membrane is adopted for treating suspended matters, colloids, bacteria, macromolecular organic matters and heavy metal ions, and soluble organic matters, peculiar smell, chromaticity and trace pollutants can be removed through the system, so that discharged reclaimed water can meet the three-stage standard of surface water.

The invention relates to sewage detection, and particularly provides a water quality trace pollutant automatic monitoring method based on online enrichment and voltage focusing compensation, which comprises the following steps: A1, collecting sewage and conveying the sewage to a pretreatment device; a2, respectively extracting an interior label and an acid, and feeding the interior label and the acid into a sample pool; a3, extracting a mixed solution in the sample pool, and sending the mixed solution to a second quantitative loop; a4, the pure water pushes the mixed liquid in the quantitative loop to enter the activated enrichment unit; a5, eluting the sample to a mass spectrum analyzer by the mobile phase; a6, the sample is ionized, and ions sequentially pass through the incident lens, the multi-pole rod and the emergent lens; obtaining a compensation voltage E according to the mass of the ions and the charge number; the compensation voltage E is applied to an incident lens and an emergent lens, and ions are focused at an inlet of the incident lens and an outlet of the emergent lens respectively; the ions are received by the detector, and information of forbidden objects in the sewage is output after analysis. The method has the advantages of automation, accuracy and the like.

The invention discloses a method for rapidly screening 25 environmental hormones in an aquatic product. The method comprises the following steps: performing QuEChERS extraction on the aquatic product to obtain a QuEChERS extracting solution; mixing the QuEChERS extracting solution with an extracting agent, water and an adsorbent to form a micro-emulsion system, centrifuging the micro-emulsion system, and enriching a target object in a solidified organic phase; carrying out gradient elution separation by adopting a C18 chromatographic column; and high-resolution mass spectrum data is acquired in a positive and negative ion switching mode. The method disclosed by the invention integrates efficient extraction, deep purification and high-sensitivity detection, and is suitable for efficient enrichment, purification and accurate detection of multi-component trace pollutants in a complex biological matrix.

The invention discloses a multi-legged organic ligand modified attapulgite adsorbent as well as a preparation method and application thereof, belongs to the technical field of water pollution control, and solves the problems of low recognition precision and insufficient adsorption capacity of an existing adsorption material on trace pollutants. The adsorbent provided by the invention comprises amino-modified attapulgite and a multi-potent organic ligand. The preparation method comprises the following steps: preparing acidic attapulgite; preparing amino modified attapulgite; the preparation method comprises the following steps: adding NaOH and 4-bromopyridine hydrochloric acid into dimethyl sulfoxide, then adding trihydroxy ethane or dipentaerythritol, reacting to obtain a three-legged or six-legged organic ligand intermediate, adding the three-legged or six-legged organic ligand intermediate and 5-chloromethyl salicylaldehyde into acetonitrile, and heating for reacting to obtain a three-legged or six-legged organic ligand; and adding the amino-modified attapulgite and a three-legged or six-legged organic ligand into a solvent II, and carrying out heating reaction to obtain the amino-modified attapulgite. The adsorbent is applied to removal of malachite green in wastewater. According to the invention, the adsorption efficiency of the attapulgite material on low-concentration pollutants in a complex system is improved.

The invention discloses an on-line detection device and method for trace dye, which is characterized in that argon is continuously introduced into an aqueous solution containing the trace dye, and microbubbles are generated in situ in the solution. The microbubbles enrich target dye molecules through the gas-liquid mass transfer effect in the rising process and explode at a gas-liquid interface to generate microbubble aerosol, and the aerosol is ionized through a corona discharge area and then directly enters a mass spectrum port to be subjected to real-time online detection and quantitative analysis. The technical bottlenecks of a traditional detection method in the aspects of sensitivity, selectivity, real-time performance and the like are solved, the detection limit is remarkably reduced, the response intensity of the mass spectrum is improved, a brand new technical solution is provided for rapid and in-situ detection of trace pollutants in the water body, and the method has important application value in the field of environmental monitoring.

The present application belongs to the field of biomedical detection, and particularly relates to a magnetic molecularly imprinted material for detecting various pollutants and a detection method. The present application coats magnetic Fe3O4 material with inorganic SiO2, and then coats the inorganic SiO2 with a layer of organic-inorganic hybrid SiO2 nanoparticles. Through high-temperature treatment, pores are formed on the surface of the organic-inorganic hybrid SiO2 nanoparticles, thereby improving the adsorption of target objects. Then, the SiO2@Fe3O4 material with good dispersity is obtained through activation and dispersion treatment. Finally, a molecular imprinting layer is introduced on the surface of the modified magnetic SiO2@Fe3O4 material to form the magnetic molecularly imprinted material. The material is combined with solid-phase extraction technology to realize the extraction of pollutants in urine. Then, the pollutants are detected through high-performance liquid chromatography. The method effectively reduces the interference of impurities and improves the accuracy of quantification, so that the detection of trace pollutants is more sensitive.