20 results about "Cadmium Metal" patented technology

The invention discloses a microbial agent and a method for repairing cadmium-polluted rice field soil by using the microbial agent, relates to the technical field of repairing cadmium pollution of rice field soil, and solves the problem that the cadmium metal enrichment capacity of duckweed is limited due to the fact that the duckweed has certain endurance capacity to cadmium stress. The microbial agent comprises bacillus subtilis ATCC6633 and pseudomonas aeruginosa ATCC27853, and the mass ratio of the bacillus subtilis ATCC6633 to the pseudomonas aeruginosa ATCC27853 is 2: 1, and the method comprises the following steps: step 1, spreading the microbial agent on the surface layer of cadmium-polluted rice field soil, then mixing the microbial agent with the rice field soil, raking the rice field soil, adjusting the water-holding capacity of the rice field soil, applying a base fertilizer, and irrigating the rice field. According to the method, the cadmium tolerance of the duckweed can be promoted, so that the enrichment capacity of the duckweed on cadmium is promoted, the remediation capacity of the duckweed on cadmium-polluted soil is improved, the cadmium content in the soil can be reduced, and the content of metal cadmium in rice is also reduced through a competitive cadmium absorption way.

The invention discloses a soil environment Cd metal monitoring method based on specific response of root exudates, which comprises the following steps: in a monitoring period, carrying out root exudates sample collection and soil sample collection on a to-be-monitored area, carrying out root environment perception and dynamic exudates capture based on the collected samples, and generating a root perception data set; a response mode between the soil environment Cd degree and root exudates is established, and an exudates response characteristic fingerprint spectrum is established; coupling the synchronously collected soil environment data to carry out feature importance analysis and regression modeling, quantifying interference rules of different environment factors on a secretion response mode, and generating an environment correction coefficient set; constructing an environmental cadmium analysis model by utilizing the secretion response characteristic fingerprint spectrum and the environmental correction coefficient set; and in the next monitoring period, acquiring real-time area monitoring data of the cadmium sampling points in the area to be monitored, importing the real-time area monitoring data into the environment cadmium analysis model to carry out area cadmium metal situation diagnosis, and carrying out early warning prompt.

The invention provides an aqueous cadmium ion-vanadium dioxide battery as well as a preparation method and application thereof, and relates to the field of ocean energy storage. The battery comprises a negative electrode, a positive electrode, a diaphragm and an aqueous electrolyte, the negative electrode is metal cadmium or cadmium-based alloy; the active material of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the aqueous electrolyte is an aqueous solution containing cadmium salt; the total concentration of the cadmium salt in the aqueous electrolyte is 1-4 mol / L. The aqueous vanadium dioxide-cadmium metal secondary battery disclosed by the invention has the advantages of safe aqueous electrolyte system, high rate capability, ultra-long cycle life and the like, and has remarkable advantages when being applied to ocean energy storage.

The invention provides a method for enhancing phytoremediation of cadmium-contaminated soil by using a degradable chelating agent, which comprises the following steps: selecting torch cockscomb seedlings with relatively strong enrichment capacity on cadmium metal, planting the seedlings into a cadmium-contaminated soil layer to be remedied, and spraying a special green degradable composite chelating agent for several times in a growth cycle, so that the cadmium-contaminated soil layer to be remedied is obtained. Therefore, activation and release of cadmium in the soil layer to be repaired are promoted, the extraction efficiency of the torch cockscombs on cadmium is enhanced, and meanwhile growth of the torch cockscombs is promoted. Compared with a chelating agent with a single component, the composite chelating agent with preferable components and content is sprayed into the cadmium-polluted soil, and the purification efficiency of the torch cockscomb on cadmium can be more effectively improved. Moreover, according to the method, the gravel layer, the coarse gravel mixing layer and the adsorption material layer are built below the cadmium-polluted soil layer to be repaired, so that cadmium pollutants are prevented from being migrated into underground water, and secondary pollution is avoided. The method is low in remediation cost, environmentally friendly and especially suitable for remediation of moderately and severely cadmium contaminated soil.

The present invention discloses a cadmium metal-organic framework material (Cd-MOF) and its composite film, preparation method and application of self-driven light-induced organic reaction. The present invention assembles a friction nanogenerator (TENG) using Cd-MOF and its composite film material, and explores the influence of different proportions of Cd-MOF materials on the output performance of TENG, and realizes the self-driven light-induced C-H bond azidation reaction. The synthesis of Cd-MOF in the present invention is simple, easy and controllable, and the output performance of TENG can be regulated from the molecular structure, which broadens the application field of metal organic framework materials and enriches the range of selection of friction layer electrode materials. The TENG device constructed by the present invention realizes self-powered lighting of 14 1-watt visible light lamp beads, providing visible light for the C-H bond azidation reaction system.

The invention discloses an environment monitoring method and system based on dynamic planning, and relates to the technical field of environment monitoring, and the method comprises the steps: measuring and calculating the initial measurement total volume and initial measurement total area of a detected water body, detecting the initial measurement oxygen content and initial measurement ammonia nitrogen content of a sampled water body, obtaining the rainfall per unit area of a monitoring region within 24 hours, and calculating the initial measurement total volume and initial measurement total area of the detected water body; calculating to obtain actual oxygen content of the water body before being influenced by rainfall, calculating a correction coefficient of the ammonia nitrogen content in the water body influenced by time, calculating to obtain actual ammonia nitrogen concentration before being influenced by rainfall, and calculating to obtain a water body pollution index; the method comprises the following steps: acquiring a soil runoff coefficient of a monitored area, calculating the infiltration water amount of a sample collection point within 24 hours, measuring to obtain the content of primarily measured mercury metal and primarily measured cadmium metal, calculating to obtain the content of actual mercury metal and actual cadmium metal before being influenced by rainfall, and calculating to obtain a soil pollution index; and calculating a pollution emission index of each region, calculating to obtain a global pollution condition index, and calculating to obtain a global pollution prediction function.

The utility model belongs to the field of metal processing, and particularly relates to a high-purity cadmium metal crushing device which comprises crushing equipment, a dust discharging pipeline is fixedly connected to the front end of the crushing equipment, a sealing assembly is arranged on the surface of the front end of the dust discharging pipeline, and a dust removing assembly is arranged in the dust discharging pipeline. The dust removal assembly comprises a fixed block fixedly mounted on the inner wall of the crushing equipment; according to the dust removal device, the sliding ring is pulled to move in the dust removal pipeline by rotating the rotating wheel, so that dust adhered to the interior of the dust removal pipeline is scraped through the sliding ring, blockage caused by the fact that the dust is adhered to the interior of the dust removal pipeline is avoided, the flowing efficiency of the dust is improved, and the service life of the dust removal pipeline is prolonged. The opening of a cloth bag for collecting dust is connected into the groove in a sleeving manner, and then the tensioned opening of the cloth bag is pressed through the two pressing blocks, so that the opening of the cloth bag is sealed, the situation that internal dust leaks to the environment due to the fact that gaps exist at the opening of the cloth bag is avoided, and then the body health of personnel is guaranteed.

The application provides a water-based cadmium ion-vanadium dioxide battery and a preparation method and application thereof, and relates to the field of marine energy storage.The application comprises a negative electrode, a positive electrode, a diaphragm and a water-based electrolyte; the negative electrode is metal cadmium or a cadmium-based alloy; the active substance of the positive electrode is metastable monoclinic phase vanadium dioxide; the diaphragm is a glass fiber diaphragm; the water-based electrolyte is an aqueous solution containing cadmium salt; and the total concentration of the cadmium salt in the water-based electrolyte is 1-4 mol / L.The water-based vanadium dioxide-cadmium metal secondary battery has the advantages of a safe water-based electrolyte system, high rate performance and super-long cycle life, and has significant advantages in marine energy storage.

The invention belongs to the technical field of microorganisms, and particularly discloses a Burkholderia sp. Strain and application thereof, the classification name of the Burkholderia sp. Strain is Burkholderia sp. Strain is Burkholderia sp. B1, the Burkholderia sp. Strain is preserved in China Center for Type Culture Collection (CCTCC), the address is Wuhan University, Wuhan, China, the preservation number of the Burkholderia sp. Strain is CCTCC NO: M 20251553, and the preservation date is July 8, 2025. The Burkholderia B1 strain has a strong adsorption effect on lead and cadmium metal ions, has the functional characteristics of phosphorus-solubilizing plant growth promotion, soil microbial flora improvement and the like, can be used for heavy metal pollution fixed treatment, plant growth promotion, pathogenic bacteria inhibition and soil microenvironment improvement, is simple in culture condition, is easy to store, is easy for industrial production, and has a wide application prospect. Good development and application prospects are realized.

The application relates to a self-supporting NiCdMo ternary composite metal oxide catalyst and application thereof, and a preparation method of the catalyst is as follows: foam nickel is cleaned under ultrasonic conditions to obtain a foam nickel substrate; nickel metal salt, molybdenum metal salt and cadmium metal salt are dissolved in an ethylene glycol aqueous solution, the mixture is stirred uniformly at room temperature, and then is transferred to a polytetrafluoroethylene-lined high-pressure kettle, the foam nickel substrate is added, the high-pressure kettle is sealed, and a solvothermal reaction is carried out; after being naturally cooled to room temperature, the obtained precursor is washed and vacuum dried to obtain A; A is calcined in an inert atmosphere, and is naturally cooled to room temperature to obtain B; B is calcined in a 5 vol.% NH3 / N2 atmosphere, and is naturally cooled to room temperature to obtain the self-supporting NiCdMo ternary composite metal oxide catalyst. The self-supporting NiCdMo ternary composite metal oxide catalyst exhibits high catalytic activity and long-term stability in urea oxidation reaction and hydrogen evolution reaction.

The application relates to a preparation method of a cadmium sulfide@metal organic framework heterojunction composite material, and belongs to the fields of photochemical energy conversion and photocatalytic degradation. The application aims to solve the technical problems of high-quality preparation of an artificial photosynthesis photocatalytic composite material and how to effectively improve the photochemical energy conversion efficiency. The method comprises the following steps: firstly, zirconium tetrachloride, 2-amino-4,4'-biphenyldicarboxylic acid and acetic acid are dissolved in N,N-dimethylformamide, and then the mixture is transferred into a reaction kettle for heating; after the reaction is completed, the mixture is cooled to room temperature, and then taken out, washed and dried to obtain a UiO-67-NH2 solid powder; secondly, the UiO-67-NH2 powder, cadmium nitrate tetrahydrate and thioacetamide are added into deionized water, and then the mixture is continuously stirred after being heated; after the reaction is completed, the mixture is cooled to room temperature, and then washed and dried for multiple times to obtain a cadmium sulfide@metal organic framework (CdS@UiO-67-NH2) heterojunction composite material.

The invention discloses a cadmium metal organic complex material. A ligand of the cadmium metal organic complex material is a dicarboxyl derivative H2DPDBP based on tetraphenyl ethylene. The molecular formula of the complex material is C48H44CdN2O6, the complex material belongs to an orthorhombic system, the space group is Pna21, and the cell parameters are as follows: a = 39.526 (2), b = 9.9225 (5), c = 10.0717 (4), alpha = 90 degrees, beta = 90 degrees, gamma = 90 degrees and V = 3950.1 (3). The preparation method of the material comprises the following steps: putting cadmium nitrate and a ligand H2DPDBP into a mixed solvent of N, N-dimethylacetamide and methanol to carry out solvothermal reaction, cooling, filtering, washing and drying to obtain a product. The preparation method is simple, convenient and stable in yield. The material shows strong blue fluorescence emission under a 365nm ultraviolet lamp at room temperature, and has good thermal stability, and the fluorescence quantum yield is up to 98.1%.

The invention relates to a nitrogen-containing dicyclobutane derivative with a controllable configuration and a preparation method thereof. According to the invention, cadmium metal is taken as a coordination metal, and is subjected to coordination driving self-assembly with a diolefin-containing ligand under the assistance of carboxylic acid to form a stable coordination polymer, so that a [2 + 2] light ring addition reaction is realized under a solid-phase condition, and the controllable nitrogen-containing dicyclobutane derivative with a stable structure is efficiently and highly selectively synthesized. The method effectively avoids the common side reaction and isomerization problems in the traditional liquid phase reaction, has the advantages of mild reaction conditions, high yield, good stereoselectivity, easy product separation and the like, and provides a new way for synthesis of dicyclobutane compounds with potential biological activity.

The present application relates to the field of remediation of heavy metal pollution in sediments, and particularly relates to a fixing agent, a preparation method and application thereof. The fixing agent comprises electron shuttles and dissimilatory metal-reducing bacteria. The fixing agent is used for fixing heavy metals in water or remediation of heavy metal contaminated sediments. The heavy metals are selected from one or more of cadmium and lead. The dissimilatory metal-reducing bacteria used in the present application widely exist in river and lake sediments, and the sediments have strong adaptability and good heavy metal resistance. The electron shuttles are used to strengthen the dissimilatory metal-reducing bacteria to reduce and recrystallize the cadmium after reducing the iron and manganese oxides which exist in large quantities in the sediments. The sediments contain abundant organic matter which can provide carbon source for the dissimilatory metal-reducing bacteria, thereby avoiding the addition of iron source, manganese source and organic carbon source, reducing the risk of secondary pollution, and fully utilizing the abundant substances in the sediments to effectively fix the heavy metals.

The invention discloses a preparation method and application of a cadmium metal-organic framework material, and belongs to the technical field of functional materials. The chemical formula of the cadmium metal-organic framework material is {[Cd2 (L) 2H2O] 2 (H2O)}. (4H2O). (DMF), and L is deprotonated 4, 4 '-(2-(1H-pyrazole-4-alkyl)-1H-imidazole-4, 5-dialkyl) dibenzoic acid. The cadmium metal-organic framework material has a specific crystal structure and space structure, is high in synthesis purity and good in stability, and can be used for detecting fluazinam pesticides. Quantitative detection of fluazinam can be realized through fluorescence intensity detection, the lowest limit value of detection is 1.68 mu M, and semi-quantitative detection of fluazinam can be conveniently and quickly realized through colorimetric detection on a paper-based device.

The invention discloses a process for recycling cadmium metal in secondary zinc resources through an ammonia method. The process comprises the procedures of leaching, filter pressing, purification and electrodeposition. By optimizing the parameters of the Zn (II)-NH3-NH4Cl-H2O system and controlling the liquid-solid ratio, temperature, time and other conditions, efficient recovery of cadmium ions is realized. According to the method, the cadmium metal recovery rate can be remarkably increased to 90% or above, the ammonia consumption can be reduced to 250 kg / t.Zn, the purification burden can be relieved, the operation environment can be improved, meanwhile, various non-ferrous metals in the zinc-containing materials can be comprehensively recovered, an efficient and environment-friendly solution is provided for the zinc hydrometallurgy technology, and remarkable economic and social benefits are achieved.

The invention discloses a method for deep replacement of cadmium in a low-cadmium solution by utilizing dielectric property difference reinforced zinc powder, and belongs to the technical field of hydrometallurgy. Heating the cadmium-containing solution to 60-70 DEG C, wherein the content of cadmium ions in the solution is less than or equal to 1200 mg / l; zinc fine powder is added according to 0.8-1.0 time of the theoretical addition amount, the proportion of particles with the particle size smaller than 75 microns is larger than 80%, and the content of Zn is larger than 95%. The reaction system is subjected to ultrasonic strengthening while being fully stirred, the ultrasonic power is 200 w, the ultrasonic frequency is 15-25 kHz, the ultrasonic intensity is 20-30%, and the ultrasonic treatment time is 20-25 min. And carrying out solid-liquid separation on the replaced solution, and returning the filter residue to a sponge cadmium acid dissolution section, wherein the content of cadmium ions in the filtrate is less than or equal to 25mg / l. According to the method, deep purification of cadmium can be achieved, and the cadmium ion content of the filtrate is remarkably reduced; the reaction time is shortened by half, and the problem of cadmium redissolution in the replacement process is avoided; the influence of excessive zinc powder on the quality of sponge cadmium is avoided; the resource recovery of the cadmium metal in the purification slag is realized; the original technological process is not changed, implementation is easy, and economic benefits are good.

The present invention relates to the technical field of metal-organic framework crystalline functional materials, and particularly relates to a cadmium metal-organic framework material with long afterglow characteristics and a preparation method thereof. The coordination compound chemical formula of the cadmium metal-organic framework material is [Cd2(D-Cam)2(bidpe)2]·6H2O, wherein bidpe is 4,4'-bis(imidazol-1-yl)diphenyl ether, and D-Cam is deprotonated D-camphoric acid. The preparation method is as follows: cadmium nitrate, 4,4'-bis(imidazol-1-yl)diphenyl ether, and D-camphoric acid are subjected to a solvothermal reaction, followed by cooling, washing, and drying. The preparation method is simple, has good stability, and a high yield. Under room temperature conditions and irradiation with a 365 nm ultraviolet lamp, it shows blue fluorescence emission, and after turning off the ultraviolet light, it shows long green phosphorescence.

The application discloses a three-dimensional cadmium metal organic framework material with a fluorescent detection function, and synthesis and application thereof, and has a chemical formula of Cd4(BTB)3(DMF)2(H2O)6·((CH3)2NH2). The synthesis method of the three-dimensional cadmium metal organic framework material is generated by a solvothermal reaction of 1,3,5 benzene-triphenylmethane acid BTB and anhydrous cadmium nitrate. The three-dimensional cadmium metal organic framework material with the fluorescent detection function is applied to detection of p-nitrophenol. The complex can specifically detect p-nitrophenol, has strong anti-interference ability, low detection limit and fast response speed, has strong acid and alkali resistance, and good fluorescent stability. In addition, the three-dimensional cadmium metal organic framework material has low raw material cost, simple and environment-friendly synthesis method, and high yield.

The invention provides a sensing material based on a cadmium metal organic framework as well as a preparation method and application of the sensing material, and a chemical structural unit of the sensing material comprises cadmium ions and 2, 3-quinoline diformate anions; the preparation method at least comprises the following steps: adding 2, 3-quinolinedicarboxylic acid and cadmium salt into a mixed solvent, carrying out solvothermal reaction at 130-150 DEG C for 36-60 hours, and after the reaction is finished, cooling and separating to obtain the Cd-MOF sensing material. The Cd-MOF sensing material disclosed by the invention is good in stability and has high selectivity and high sensitivity to Fe < 3 + > ions, and the good stability and wide pH adaptability of the sensing material guarantee the reliable detection capability in different actual water samples; the bottleneck problem that sensitivity, selectivity, environmental applicability and on-site convenience of a traditional sensing technology are difficult to consider at the same time is systematically solved.