26 results about "Neonicotinoid" patented technology

The invention discloses a rapid treatment device and method for neonicotinoid pesticide polluted water in a river network area, and belongs to the technical field of water treatment. The device comprises a mixing unit, a settling separation unit and an adsorption medium circulating unit, the mixing unit is provided with a tangential water inlet and an adsorption medium feeding port; the settling separation unit is used for realizing rapid gravity separation of the adsorbed medium and water; and the adsorption medium circulation unit is used for medium recovery and regeneration. The invention also discloses a special core-shell structure composite particle adsorption medium and a preparation method thereof, and a rapid adsorption treatment method based on the device. Through the physical process of eddy enhanced mixing-rapid settling separation, the problems that a traditional adsorption technology is low in treatment speed, prone to blockage and low in flux are solved, and the device and the method are particularly suitable for emergency treatment of sudden and large-flow trace neonicotinoid pesticide polluted water in river network areas and have the advantages of being rapid in response, large in treatment flux, reliable in operation and low in cost.

The invention belongs to the technical field of pollutant treatment, and particularly relates to a Cu < 2 + >-mediated method for degrading neonicotinoid pollutants in a water body, which comprises the following steps: S1, adjusting the initial pH value of the water body containing the neonicotinoid pollutants to 6.0-9.0; s2, adding bivalent copper ions Cu < 2 + > and hypochlorous acid HOCl into the water body, and reacting for 12-48 hours; the concentration of bivalent copper ions Cu < 2 + > is not higher than 1mg / L, and the concentration of hypochlorous acid HOCl is not higher than 10mg Cl2 / L. Compared with the prior art, the induction mechanism of Cu < 2 + > on free radical oxidation of the neonicotinoid pollutants is clarified, the degradation speed and the total degradation rate of the neonicotinoid pollutants are improved by utilizing Cu < 2 + >, the degradation rate of the neonicotinoid pollutants after 6 hours exceeds 60%, and the degradation rate of the neonicotinoid pollutants after 36 hours can reach 99%.

The invention provides a composite repairing agent capable of synchronously removing heavy metal cadmium and neonicotinoid pesticides and a preparation method and application of the composite repairing agent. The composite repairing agent comprises a functional fungicide and iron minerals, and the ratio of the dry weight of the iron minerals to the volume of a fungicide liquid of the functional fungicide is 1: (1-10); the functional microbial agent is a viable bacterium culture of dissimilatory iron reducing bacteria, the thallus concentration of the functional microbial agent is not lower than 1 * 10 < 8 > CFU / mL, and the iron mineral is Fe2O3.nH2O. According to the method, an iron reducing bacteria-ferrihydrite mixed system formed by in-situ active minerals is constructed, efficient treatment of combined pollution is achieved through an adsorption-conversion-degradation synergistic mechanism, and ferrihydrite is converted into magnetite in situ within 24-72 hours through iron reducing bacteria in the iron reducing bacteria-ferrihydrite; the new magnetite shows excellent dual functions, and the removal rate of Cd can be increased to gt by crystal lattices of the new magnetite through obligate adsorption and coprecipitation; meanwhile, structural ferrous iron is used as a strong reducing agent and can efficiently attack nitryl in imidacloprid molecules, and gt, gt, gt, gt, gt, gt and gt are achieved; the degradation rate is 90%.

The application discloses a comprehensive detection method and system for neonicotinoid compounds in an environment, and is characterized in that: the coverage of mass spectrum information is improved based on coupling of a multi-module data-dependent acquisition mode and a multi-window data-independent acquisition mode; a suspected screening analysis database is established based on a core structure of neonicotinoid compounds; compounds matched with the suspected screening compounds are detected; and the neonicotinoid compounds in the environment sample to be detected are subjected to non-target analysis based on coupling of a feature molecule network technology in the data-dependent acquisition mode and a feature fragment ion extraction technology in the data-independent acquisition mode, so as to back-propagate candidate compounds different from the target compounds and the suspected screening compounds; and the comprehensive detection of potential neonicotinoid compounds in the environment sample to be detected is realized through target analysis, suspected screening analysis and non-target analysis.

The invention discloses a method for evaluating the ecological health risk of a typical neonicotinoid pesticide, which is characterized in that drosophila melanogaster is taken as a biological model, and the ecological health risk of the typical neonicotinoid pesticide is evaluated through comprehensive analysis of multiple indexes such as morphology (phenotype, life, development and behavior), histology, energy metabolism, oxidative stress and cell apoptosis of the drosophila melanogaster. According to the method disclosed by the invention, the influence of the typical neonicotinoid pesticide on the growth process of the drosophila melanogaster can be quickly and intuitively evaluated, and the ecological health risk of the typical neonicotinoid pesticide can be reflected; meanwhile, the method systematically evaluates the biotoxicity possibly generated when the typical neonicotinoid pesticide enters the ecological environment after being applied, makes up the research blank in the field, and plays a reference role in safe use of the typical neonicotinoid pesticide.

The invention belongs to the technical field of detection, and particularly relates to an in-situ electrochemical etching silk-screen printing silver electrode, a preparation method thereof and an EC-SERS platform. On the basis of a pesticide protonation-EC-SERS combined strategy, an independently prepared SPE-Ag electrode is used as an enhanced substrate, a mobile phone is coupled to regulate and control a portable electrochemical workstation to apply potential, an EC-SERS rapid detection platform is established, the EC-SERS rapid detection platform is successfully used for rapid and sensitive detection of the residues of the neonicotinoid pesticide imidacloprid, the detection limit is as low as 1.5 nM, and the EC-SERS rapid detection platform can be used for rapid and sensitive detection of the residues of the neonicotinoid pesticide imidacloprid. According to the present invention, the problem that the on-site real-time application of the EC-SERS technology is limited by the equipment size, the cost and the operation complexity is solved, the portable and low-threshold on-site detection platform is provided, the detection cost is significantly reduced while the sensitivity of the traditional EC-SERS is maintained by the platform, the operation threshold is substantially reduced, and the detection efficiency is improved. And a method with a better application prospect is hopefully provided for on-site real-time detection of pesticide residues.

The invention belongs to the field of chemical ecology of agricultural pests and pesticide science, and relates to an insecticide composition for improving the sensitivity of agricultural pests to insecticides and application of the insecticide composition. Folic acid is applied to a pest feeding substrate, a host plant or a feed, so that the sensitivity of pests to various insecticides (including neonicotinoids, pyrimidines, pyrethroids, organophosphorus and the like) can be remarkably enhanced. It is found that folic acid can regulate and control a carbon metabolism network in pests and inhibit cytochrome P450 and other detoxification enzyme related pathways, and then the endurance capacity of the pests to insecticides is reduced. The composition and the method are verified in seven important pests such as brown planthopper, sogatella furcifera, spodoptera frugiperda, cotton aphid, chilo suppressalis, panonychus citri and thrips, have the advantages of improving the pesticide effect, reducing the pesticide application amount and delaying the resistance evolution, and can be widely applied to comprehensive treatment of agricultural pests.

The invention belongs to the field of pesticide pollution remediation. The invention provides a preparation method of a TiO2-ZnO photocatalyst for efficiently degrading neonicotinoid pesticides, which comprises the following steps: (1) grinding and fully mixing ZnO and 2-methylimidazole, transferring into a reaction kettle, and reacting to obtain an MOFs material ZIF-8; (2) adding polyethyleneimine and acetic acid into tetrabutyl titanate, stirring, then adding ZIF-8, and continuously stirring; (3) transferring the mixed solution in the step (2) into a polytetrafluoroethylene reaction kettle for reaction; (4) washing and drying the precursor substance after the reaction in the step (3); and (5) transferring the precursor substance obtained in the step (4) into a crucible, and carrying out high-temperature pyrolysis in a tubular furnace in an air atmosphere to obtain TiO2-ZnO. The invention further provides the TiO2-ZnO photocatalyst for efficiently degrading the neonicotinoid pesticide and application of the TiO2-ZnO photocatalyst. The TiO2-ZnO photocatalyst provided by the invention shows good degradation performance and long-term stability on the neonicotinoid pesticide. The synthesis steps are simple and suitable for industrial large-scale production.

The invention discloses a shiitake mushroom dreg polysaccharide nano-selenium fertilizer and a preparation method and application thereof, the shiitake mushroom dreg polysaccharide nano-selenium fertilizer comprises shiitake mushroom dreg polysaccharide and nano-selenium, and the shiitake mushroom dreg polysaccharide coats the surface of the nano-selenium; the preparation method comprises the following steps: preparing crude polysaccharide from shiitake mushroom residues by adopting ultrasonic-assisted extraction, hydrothermal extraction, enzymolysis deproteinization and alcohol precipitation processes; taking the polysaccharide as a carrier, and reacting with sodium selenite and ascorbic acid to prepare the flower mushroom dreg polysaccharide nano-selenium fertilizer. The method realizes resource utilization of the mushroom dregs, and is low in cost and simple and efficient in process. The obtained fertilizer is good in stability and high in biological activity, can remarkably increase the content of selenium and microelements in vegetables, reduce pesticide residues, relieve neonicotinoid pesticide stress and salt damage of saline-alkali soil, enhance the osmotic regulation capacity of crops and improve biomass when applied to crops, and provides a new path for efficient agricultural production of the saline-alkali soil.

The invention relates to a plasma activated water enhancement-based pesticide composition and application thereof, and aims to solve the technical problems of drug resistance crisis, environmental residue pollution and unstable control effect existing in chemical control of cotton aphids. Plasma activated water (PAW) and neonicotinoid / picolinamide insecticides are compounded to form a synergistic system with the concentration of LC10-LC75, oriented application is conducted on the basis of the insect age adaptation rule (imidacloprid is used for evaluation for 24 h, flonicamid is used for evaluation for young aphids, 72 h is used for evaluation for young aphids), the epidermis structure of cotton aphids is destroyed through reactive oxygen nitrogen substances (RONS) in the PAW, the permeability of the pesticides is enhanced, and therefore the cotton aphids with the concentration of LC10-LC75 are obtained. The comprehensive technical effects of remarkably improving the fatality rate of the cotton aphids at each age, reducing the pesticide dosage, reducing environmental residues and delaying the development of drug resistance are achieved.

The present application relates to PxGSTD2 protein mutants, and the use of wild type and mutants of PxGSTD2 protein in catalyzing the conjugated coupling of pesticides with reduced glutathione (GSH) and improving the pesticide tolerance of non-target organisms. The PxGSTD2 protein and its mutants provided by the present application catalyze the conjugated coupling of various types of pesticides such as oxadiazines, neonicotinoids, pyrethroids and the like with GSH, improve the water solubility of the pesticides, reduce the toxicity of the pesticides, form adducts that are easily excreted out of the body by organisms, and thus significantly enhance the tolerance of non-target organisms to pesticides.

The application discloses a neonicotinoid pesticide-heavy metal compound contaminated soil remediation method, which comprises the following steps: after ploughing and leveling the neonicotinoid pesticide-heavy metal compound contaminated soil, applying bottom fertilizer and neonicotinoid pesticide remediation agent in sequence, ploughing and maintaining, and then transplanting grain amaranth seedlings; when the grain amaranth seedlings grow to the present budding stage, spraying a heavy metal activator to adsorb the soil heavy metal. The application can effectively adsorb, extract and degrade the heavy metal and the neonicotinoid pesticide in the neonicotinoid pesticide-heavy metal compound contaminated soil, reduce the heavy metal and the pesticide residue in the soil, and has the advantages of fast remediation speed, good effect, simple operation and large treatment capacity.

The application provides an anti-termite sealing material of silica gel foam and a preparation method thereof, and belongs to the technical field of polymer sealing materials. The raw material formula of the anti-termite sealing material of silica gel foam is as follows: vinyl silicone oil, reinforcing filler, flame-retardant filler, contact killing agent, bait agent, odor agent, structure control agent, inhibitor, platinum catalyst, foaming agent, hydroxyl silicone oil and hydrogen-containing silicone oil; wherein the contact killing agent is one or more of pyrethroid, neonicotinoid, phenylpyrazole, boric acid, glycine, erythritol and fipronil; the bait agent is one or more of diatomite, talcum powder, capsaicin, dihydrocapsaicin and denatonium benzoate; and the odor agent is one or more of camphor oil, peppermint oil, limonin, limonene, citral, decanal, octanal and nonanal. The anti-termite sealing material of silica gel foam has excellent flame-retardant performance, mechanical performance and anti-termite biting performance, and can well protect the integrity of the sealing material.

The application discloses a flexible hydrogel electrochemical sensing patch for detecting neonicotinoid pesticides, and belongs to the technical field of pesticide detection. The flexible hydrogel electrochemical sensing patch comprises an electrochemical sensor and a PDMS substrate; the electrochemical sensor is composed of a pesticide aptamer functionalized flexible hydrogel working electrode, a reference electrode and a counter electrode; the PDMS substrate comprises at least one sensor groove, and the groove is used for placing the electrochemical sensor composed of a three-electrode system. The flexible hydrogel sensing patch can be effectively attached to the surfaces of various vegetables and fruits, can specifically capture neonicotinoid pesticide residues, and realizes synchronous and quantitative analysis of various neonicotinoid pesticides.

The invention discloses an extraction detection treatment method, and belongs to the technical field of agricultural product safety detection. The method comprises the following steps: homogenizing and extracting a sample by using an extraction solvent, adding a multifunctional magnetic composite material of which the surface is modified with a weak cation exchange group, adjusting the pH value to 6-9, and carrying out vortex adsorption; and separating the material through an external magnetic field, washing, eluting by using an eluent compatible with a liquid chromatography mobile phase, collecting the eluent, and directly injecting the eluent into LC-MS / MS or HPLC for analysis. The magnetic composite material is formed by compounding Fe3O4 nanoparticles, C18 bonded silica gel and a covalent organic framework material, has multiple adsorption mechanisms, and can synchronously enrich various pesticide residues such as organic phosphorus, pyrethroids, carbamates and neonicotinoid. The method is easy and convenient to operate, good in purification effect, stable in recovery rate and suitable for high-throughput rapid screening of pesticide residues in matrixes of various agricultural products such as fruits, vegetables and grains.

This invention discloses a compound microbial agent, its preparation method, and its application, belonging to the field of microbial and agricultural environmental safety technology. The invention provides a compound microbial agent comprising a carrier and functional bacteria immobilized on the carrier; the carrier comprises humic acid-modified biochar, the surface of which has oxygen-containing functional groups, nitrogen-containing functional groups, and an aromatic ring skeleton; the oxygen-containing functional groups include one or more of carboxyl groups, phenolic hydroxyl groups, and quinone groups, and the nitrogen-containing functional groups include amine groups; the functional bacteria include neonicotinoid degrading bacteria; the compound microbial agent provided by this invention promotes extracellular electron transfer in microorganisms by constructing a dual-channel electron transport network, thereby accelerating the degradation of neonicotinoid compounds, and its preparation method is simple, with widely available raw materials and low cost.

A treated mesh sheeting containing an insecticide such that the mesh sheeting acts as a physical and chemical barrier to impede the ingress of insects into a structure, in particular a building structure. The insecticide maybe selected from any one or more of the group comprising pyrethrum, synthetic pyrethroids, organo-chlorines, organo-sulfurs, carbamates, organo-phosphates, formamidines, neonicotinoids, nicotinoids, spinosyns, phenylpyrazoles, pyrroles, pyrazoles, dinitrophenols, pyridazinones, quinazolines, and benzoylureas. The mesh sheeting can be integrally attached to a building structure to impede the ingress of insects, particular termites.

Described herein is an agrochemical composition including a) a neonicotinoid or a 3-pyridine carboxamide insecticide; and b) a crystal growth inhibiting system, wherein the crystal growth inhibiting system is a combination of a mineral oil and a surfactant mixture. Also provided are a process, method, use and kit thereof.

The invention belongs to the technical field of pesticide control, and relates to a pesticide composition and application. The pesticide composition comprises an active component A and an active component B, the active component A is a compound represented by a formula (I), the active component B is a neonicotinoid compound, and the mass ratio of the active component A to the active component B is 1: 85-45: 1. The pesticide composition disclosed by the invention has the advantages of obvious synergistic effect, fast pesticide effect, long lasting period, increased acting sites, expanded prevention and control spectrum and capability of reducing the field dosage of effective components, so that the production and use components are reduced, and the generation of drug resistance of pests and pest mites is delayed.

The invention discloses a method for detecting neonicotinoid compounds in sediments, which comprises the following steps: S100, drying, grinding and sieving a sediment sample, uniformly mixing the sediment sample with diatomite, extracting by using a methanol-acetonitrile mixed solvent as an extracting agent and adopting an accelerated solvent extraction method, and concentrating an extracting solution to be purified; s200, purifying the concentrated extract by using a solid-phase extraction column, collecting the eluent, concentrating, and filtering to obtain a sample to be detected; and S300, analyzing the concentration of the neonicotinoid compounds in the sample to be detected by using high performance liquid chromatography-tandem triple quadrupole mass spectrometry. The method is simple to operate, rapid and time-saving, has relatively good sensitivity and precision, and can be applied to detection of river sediments in a chemical aggregation area.

The invention discloses an insecticide composition based on fenoxycarb application. The insecticide composition is formed by compounding fenoxycarb, a biological source synergistic component and an agriculturally acceptable auxiliary agent, the biological source synergistic component comprises at least one of pyrethroids, neonicotinoids, bisamides or insect growth regulators; the mass ratio of the fenoxycarb to the biological source synergistic component is (1-20): (20-1). Compared with the prior art, the pesticide composition based on fenoxycarb application has the advantages that fenoxycarb and a specific type of biological source synergistic component are scientifically compounded, the limitation of a single component is overcome, and the control effect on various agricultural pests is remarkably improved.

The application discloses a Co9S8 / Fe2O3 heterojunction composite catalyst and a preparation method and application thereof, and belongs to the field of nanocomposites, material science and photocatalysis technology. The composite catalyst takes Fe2O3 obtained by calcining MIL-88A(Fe) as a precursor, uniformly disperses Co9S8 nanoparticles on the surface of tubular Fe2O3 to form a Schottky heterojunction structure. The application is prepared by a MOFs derivation-sulfidation two-step method, takes cobalt nitrate as a cobalt source, takes thioacetamide as a sulfidation agent, and takes Fe2O3 derived from MIL-88A(Fe) as a substrate, so that the uniform dispersion of cobalt ions and the directional growth of Co9S8 phases are promoted. The application utilizes porous Fe2O3 generated by pyrolysis of MIL-88A(Fe) as an active main body, introduces Co9S8 as an electron transmission bridge through a sulfidation reaction, and reasonably constructs a Co9S8 / Fe2O3 heterojunction photo-Fenton catalytic system. The system can efficiently activate PMS to generate active free radicals under light excitation, exhibits excellent degradation performance and cycle stability for the second generation of neonicotinoid pesticides, and shows a good practical application prospect.

The application discloses a kind of based on 3D molybdenum disulfide nanoflower material pesticide residue degradation method, belong to pesticide residue degradation field.The application is prepared 3D molybdenum disulfide nanoflower material (MoS2-CF) using hydrothermal reaction, and based on the material is constructed suitable for a variety of neonicotinoid pesticide fruit and vegetable pesticide residue degradation technology, and the degradation mechanism is explained.The results show that MoS2-CF can effectively activate peroxymonosulfate, and its unique flower structure is conducive to the exposure of active site and improves mass transfer efficiency.In 15 minutes, it can realize the degradation rate of residual acetamiprid, imidacloprid and thiamethoxam in tomato 97.1%, 95.3% and 100%.At the same time, the treatment method can effectively remove residual pesticides without damaging the content of aromatic compounds in fresh tomatoes, ensuring the flavor quality of fresh fruits and vegetables, and is an efficient, environmentally friendly fruit and vegetable pesticide residue control method with wide application prospect.

The invention belongs to the technical field of treatment of refractory industrial wastewater, and particularly relates to a method for treating pesticide wastewater through cooperation of ozone micro-nano bubbles and PMS based on a two-channel activation mechanism and a step-by-step adding strategy. Aiming at neonicotinoid pesticide wastewater with high concentration and high background interference, the invention constructs a synergistic coupling system of MNBs and PMS. The cavitation heat effect during collapse of MNBs is innovatively utilized to promote uniform cracking of PMS to generate high-oxidation-potential. SO4 <->, meanwhile, surface energy of a gas-liquid interface and Zeta potential are utilized to induce different cracking of PMS to generate high-selectivity < 1 > O2, and a'free radical-non-free radical 'dual-channel synchronously reinforced oxidation system is constructed. And an intermittent step-by-step feeding strategy designed according to reaction kinetics is matched, so that the self-quenching effect of an oxidant in a high-concentration system is avoided. Under the conditions of normal temperature, normal pressure and neutral pH, deep mineralization and rapid decoloration of the high-concentration acetamiprid wastewater are realized, and the TOC removal rate reaches 80% or above.