11results about How to "Facilitates electron transfer" patented technology

The invention relates to a bioelectrochemical sensor used for detecting hydrogen peroxide and a manufacturing method of the bioelectrochemical sensor. The novel bioelectrochemical sensor is a sensor with a three-electrode system, wherein the counter electrode is a platinum electrode, the reference electrode is saturated calomel electrode and the working electrode is gold electrode. The sensor is based on orientation combination of a polypeptide horse radish peroxidase with characteristic sequence, the promotion effect of the polypeptide horse radish peroxidase on the activity of the enzyme and the characteristic of high sensitivity of electrochemical detection methods. The sensitivity of hydrogen peroxide sensors is effectively improved and satisfactory results are obtained.

This invention relates to the field of industrial wastewater treatment technology, and discloses an electrocatalytic oxidation device and its operating method for treating saline industrial organic wastewater. Wastewater enters the reaction chamber through the bottom inlet, is forced through the anode channels, and undergoes an electrochemical oxidation reaction on the anode surface to convert chloride ions into hypochlorous acid. A vacuum ultraviolet light source performs in-situ photolysis of water molecules and hypochlorous acid, exciting various active species, including strongly reducing hydrated electrons, strongly oxidizing hydroxyl radicals, and chloride radicals. This device, through the construction of a reduction-oxidation system, can efficiently degrade various pollutants with both electron-rich and electron-deficient characteristics. This invention utilizes the synergistic coupling of electrochemical generation and photochemical conversion to convert high-concentration chloride ions into active precursors, effectively overcoming the bottlenecks of low degradation efficiency and poor selectivity in traditional technologies for high-salt and complex water quality, and significantly improving the system's mineralization efficiency and energy utilization rate.

The invention relates to the technical field of agriculture, in particular to a method for fusing anaerobic fermentation compost, which comprises the following steps: mixing organic waste raw materials, and adding sodium citrate and magnesium sulfate for treatment; feeding the treated raw materials into an anaerobic reactor, adding an iron-based core-shell structure material, controlling the pH value of the system, and carrying out anaerobic fermentation to obtain digestion residues; bicarbonate and sodium citrate are added into the digestion residues to be mixed; and entering an aerobic composting stage, controlling the moisture content of the pile body under an oxygen supply condition, heating the pile body, maintaining the pile body to enter a decomposition stage, and carrying out natural aging to produce a decomposed organic fertilizer. In the invention, by virtue of the porous structure and surface characteristics of the iron-based core-shell structure material, not only is the stability of the fermentation process ensured, but also the microbial electron transfer process is optimized, and the methane production efficiency is improved; the compound microbial agent effectively increases the number of effective microbial communities, improves the temperature and ventilation conditions in the composting process, and ensures uniform decomposition of the organic wastes.

The utility model relates to a multi-stage ecological interception ditch for agricultural non-point source pollution prevention and control, which is suitable for agricultural non-point source pollution prevention and control. Comprising a ditch body, ecological protection slopes are arranged on the two sides of the ditch body, slope plants are arranged on the slopes of the ecological protection slopes, a plurality of interception dams are distributed in the ditch body in a staggered mode to form a snakelike overflowing channel, the upstream side of each interception dam is provided with a slag blocking net, the upper edge of each slag blocking net is higher than the water surface, and the area between every two adjacent interception dams is a purification area. By arranging multiple stages of interception units, the retention time of a water body is greatly prolonged, so that the sewage treatment and purification efficiency is further improved. Through multiple effects of physics and microorganisms, the filtering and conversion performance of the ecological interception ditch on nitrogen and phosphorus in water is improved, and then the purification effect of the ecological ditch is integrally improved.

This invention provides a permeable reactive wall process and its application for simultaneously removing hexavalent uranium and sulfate from groundwater. The permeable reactive wall process consists of a first treatment unit and a second treatment unit arranged sequentially along the water flow direction. The first treatment unit is filled with a first reaction medium, including zero-valent iron, sulfur-modified coconut shell charcoal, and sulfate-reducing bacteria. The second treatment unit is filled with a second reaction medium, including zero-valent iron, ferric oxide, sulfur-modified coconut shell charcoal, and *Priestia* sp., a non-pathogenic and environmentally friendly bacterium that can simultaneously remove uranium from water through adsorption and reduction. The composite permeable reactive wall process provided by this invention has strong resistance to interference from other substances in the water. When used to simultaneously remove sulfate and hexavalent uranium from groundwater at 15–35°C, the removal rates of both sulfate and uranium in the groundwater are greater than or equal to 90%.

The application discloses a method for promoting As oxidation by activating goethite with antibiotic molecules, and comprises the following steps: S1, goethite preparation; S2, adjusting the pH of a solution containing antibiotic molecules and trivalent arsenic to 5.5-6.5, adding goethite, and carrying out reaction in dark at 23-27 DEG C and 150-190 rpm for 2-72 h to realize the activation of goethite by antibiotic molecules and further complete As oxidation; wherein the concentration of antibiotic molecules in the solution is 45-55 mu M, the concentration of trivalent arsenic is 2.67 mu M, and the adding ratio of goethite to the solution to be treated is 30-50 mg:20 ml; the application firstly proposes that antibiotic molecules can complex and reduce the surface Fe(III) of goethite to generate Fe(II), further promotes the oxidation of As(III), and provides a brand-new treatment mode for the pollution conversion of composite pollutants.

This invention belongs to the field of nanoenzyme technology, specifically relating to a method for preparing gold magnetic nanoenzymes and a method for enhancing their catalytic activity. Citric acid is added to an aqueous dispersion of Fe3O4 and mixed to obtain citric acid-modified magnetic Fe3O4 nanoenzymes. The citric acid-modified magnetic Fe3O4 nanoenzymes are then added to a solution containing a reducing agent and mixed to obtain a dispersion. A gold-containing compound is added, and the mixture is heated to its boiling point until the solution changes from black to brownish-yellow. The solution is then centrifuged, washed, and magnetically separated. The resulting brownish-yellow substance is redispersed in water to obtain a gold magnetic cascade nanoenzyme. The prepared gold magnetic cascade nanoenzyme possesses cascade catalytic reaction activity.

This invention discloses a method for preparing an iron / carbon quantum dot / biochar composite photocatalytic material and its application, belonging to the field of catalytic decomposition technology. Waste wolfberries are carbonized in an aqueous solution of 0.02–2 mol / L K₄[Fe(CN₆)]·3H₂O at 180–200°C for 6–8 hours. The resulting mixture is then centrifuged at 8000–10000 rpm for 10 minutes to separate the lower solid layer. This lower solid layer is dried at 60–80°C for 6 hours, ground, and sieved to obtain the iron / carbon quantum dot / biochar composite material. This invention uses a one-step synthesis method, eliminating the need for secondary composite processes and avoiding cumbersome and energy-intensive preparation steps. The resulting biochar material can be used as a purification material for sulfonamide and fluoroquinolone antibiotics in water, effectively solving the problem of sulfonamide and fluoroquinolone antibiotic pollution in aquatic environments requiring removal.

The invention discloses a catalyst for synthesizing cyclic carbonate and a preparation method of the catalyst. The catalyst is MO (at) Ag-HOF; wherein Ag-HOF represents a hydrogen bond organic framework material [Ag (HMCTA) (H2MCTA)] synthesized from AgNO3 and 5-methyl-1-(4-carboxyl phenyl)-1H-1, 2, 3-triazole-4-formic acid (H2MCTCA), and the chemical formula of the Ag-HOF is shown in the description. When the MO-Ag-HOF catalyst is used for cyclization synthesis of trimethylene carbonate from CO2 and 3-chloro-1-propanol, the catalytic activity is high, the reusability is good, and the yield of the product is greatly improved.

This invention discloses a method for enhancing electron transfer in a longitudinal phase-separation anaerobic reactor. This method achieves efficient degradation of various recalcitrant organic wastewaters and efficient biogas recovery in the anaerobic reactor. By longitudinally partitioning the reactor, relative phase separation of the acid-producing and methanogenic stages is achieved. Precise addition of acid-producing and methanogenic phase media materials through phase separation enhances the electron transfer process in the anaerobic treatment, resulting in a faster electron transfer rate, improved stability and pollutant treatment efficiency, shorter reactor start-up time, smaller footprint, easier control, lower cumulative effects of intermediate products such as VFAs, and higher treatment efficiency and energy recovery rate.

According to the bifunctional nano-enzyme-based bimodal food-borne pathogenic bacterium detection method and kit disclosed by the invention, an identification probe is a bifunctional probe of an Au-coated PB nano-enzyme modified pathogenic bacterium specific antibody Ab2, and a colorimetric-Raman bimodal detection system is constructed by matching with an Ab1 modified magnetic capture probe and a Raman label and combining a magnetic separation technology; the dual-mode detection system has the advantages of high sensitivity (LDD = 1.9 CFU / mL), high specificity, simplicity and convenience in operation, rapidness and stability when being used for detection, the reliability and accuracy of detection are remarkably improved through mutual verification of two modes of Raman detection and colorimetric detection, and the dual-mode detection system is suitable for on-site rapid detection of food-borne pathogenic bacteria in food matrixes such as fruit juice and the like and has a wide application prospect. And an effective technical means is provided for food safety detection.