15 results about "Metallic mercury" patented technology

The invention discloses a method for detecting metal mercury in food, and relates to the technical field of food detection. Comprising the following steps: extracting a mercury-containing solution from a to-be-detected food sample, preparing a ferrous sulfate / graphene oxide nano composite material, enriching mercury ions in the mercury-containing solution by using the nano composite material, and quantitatively analyzing the mercury ions on the nano composite material by adopting atomic fluorescence spectrometry. According to the method, the collected food sample is subjected to digestion pretreatment, the mercury-containing solution is prepared, metal mercury in the food can be fully and effectively extracted, the ferrous sulfate / graphene oxide nanocomposite is prepared, mercury ions on the nanocomposite are quantitatively analyzed through atomic fluorescence spectrometry, metal mercury detection is achieved, and the detection accuracy is high. The mercury ions in the mercury-containing solution can be fully adsorbed and enriched in the whole detection process, pollution source introduction and mercury loss are avoided, the accuracy of the detection result is ensured, the detection process is simple and clear and easy to operate, and the detection period is shortened to a certain extent.

The invention provides water quality on-line monitoring equipment for heavy metal mercury, and belongs to the technical field of water quality monitoring, the water quality on-line monitoring equipment comprises an equipment main body, the front end of the equipment main body is provided with a case and an Android screen, the equipment main body is internally provided with a detection module, a sample introduction module and a mounting plate, and the water quality on-line monitoring equipment further comprises a gas-liquid separation assembly and a self-adaptive knocking assembly; the equipment realizes unattended operation and autonomous analysis and measurement, and is suitable for continuously monitoring the content of heavy metal mercury in water; through the synergistic effect of the fan blades, the spiral blades and the isolation barrel, the gas-liquid separation process is accelerated, the umbrella plate and the wire mesh demister are additionally arranged, meanwhile, the sliding frequency of the spiral blades is adjustable through control of the electromagnet, and the separation effect is optimized; the magnetic ring moves and drives the rubber ball to knock the inner wall of the gas phase outlet pipe at the same time, so that liquid attached to the pipe wall, the umbrella plate and the wire mesh demister is effectively removed, the pipe wall is kept clean, blockage and pressure loss are avoided, the gas-liquid separation efficiency and quality are improved, and the monitoring precision is improved.

The invention relates to the technical field of resource recovery of waste mercury catalysts, and particularly discloses a method and a device for recovering mercury from a waste mercuric chloride catalyst based on ultrasonic-assisted acidic thiourea leaching. The method comprises the following steps: crushing the waste catalyst, mixing the crushed waste catalyst with an acidic thiourea leaching agent with a specific concentration in proportion, and leaching under a specific ultrasonic condition to enable mercury to form a soluble complex to enter a solution; separating the leachate through a microporous membrane, and reducing the filtrate through zinc powder to obtain mercury precipitate; and finally, centrifuging, washing and drying to obtain high-purity metal mercury. The device system integrates equipment such as a catalyst crusher, an ultrasonic leacher, a microporous membrane separator, a reaction kettle and a centrifugal machine. According to the method, efficient recovery of mercury is achieved through a mild wet process, the leaching rate reaches 90% or above, the purity of the reduced mercury product is larger than or equal to 99.5%, and the method has the advantages of being low in energy consumption, small in pollution and stable and reliable in process.

The present application relates to mercury pollution treatment technical field, especially laboratory mercury pollution automatic processing method, the method includes the following steps: step S1: the mercury waste gas is from the air inlet pipe into the pretreatment pool, so that the mercury waste gas is contacted with the absorption liquid to absorb the mercury waste gas; Step S2: when the absorption liquid changes color, the first color sensor sends a signal to the control host, the control host controls the multiple electric telescopic rod to drive the shielding block to move, so that the air outlet pipe is opened, the control host controls the first valve to open, so that the absorption liquid is contacted with the filter material through the liquid outlet pipe into the filter tank to reduce mercury ions to metallic mercury; The present application can accurately and efficiently treat mercury vapor, mercury waste liquid and find mercury leakage in time, so as to guarantee the personal safety of the experimenter.

The invention belongs to the technical field of metallurgical engineering, and mainly relates to a method for extracting mercury from mercuric sulfide by a wet process based on composite leaching and modified resin adsorption. The method comprises the following steps: adding dilute sulphuric acid into mercuric sulfide concentrate, stirring for reaction, and filtering to obtain impurity-removed mercuric sulfide; mixing the impurity-removed mercuric sulfide with a composite leaching solution, stirring and leaching to obtain a mercury-containing complexing solution; the composite leachate is a mixed solution of a complexing agent and ferric sulfate; and adsorbing the mercury-containing complexing solution through modified thiourea type chelating resin, desorbing to obtain a mercury-containing desorption solution, and carrying out electrolytic deposition on the mercury-containing desorption solution to obtain metal mercury. The method realizes reselection of mercuric sulfide, efficient extraction of flotation concentrate, resource circulation of wastewater and harmless utilization of solid waste, has remarkable advantages in leaching efficiency, environmental protection property and raw material adaptability, and shows a wide industrial application prospect.

The invention discloses a fluorescent probe for detecting metal mercury ions and a preparation method and application thereof, the molecular formula of the probe is C21H20O5N2S, and the structural formula is shown in the specification. The invention designs a fluorescent probe for detecting metal mercury ions (Hg < 2 + >) aiming at environmental Hg < 2 + > monitoring requirements. The probe can rapidly react with Hg < 2 + > (response time is 1t, 10 s), and has nanomole-level detection sensitivity (detection limit is 1.0 nM) and excellent anti-interference capability. The method is applied to detection of mercury ions (Hg < 2 + >) in real water samples, crop soil, plant root systems and in-vitro living cells. And a novel tool is provided for providing intermediate information for pathological research of Hg < 2 + > related diseases and evaluating environmental toxicity.

The utility model relates to the technical field of metal detection equipment, and provides a metal mercury detection system which comprises a metal trap, a protective gas source and a metal detector, and the metal trap comprises a heating part; the metal mercury detection system has a first state, a second state and a third state, in the first state, the metal trap is used for introducing gas to trap mercury, in the second state, the heating part is used for heating to form mercury vapor and retaining the mercury vapor in the metal mercury detection system, and in the third state, the protective gas source is used for blowing out protective gas, and the mercury vapor is blown into the metal detector through the protective gas. The metal mercury detection system provided by the utility model aims to solve the problems of insufficient detection lower limit of mercury element and low signal-to-noise ratio of metal mercury detection equipment in the prior art.

The utility model discloses a device for adsorbing and removing heavy metal mercury ions in sewage, which belongs to the field of adsorbing and removing heavy metal ions in sewage. The device comprises: a tank body and a reactor, a water inlet pipe inserted into a filter pool inside the tank body is arranged between the tank body and the reactor, a slow flow plate is arranged on the inner wall of the filter pool, and one side of the filter pool is a weak acid washing pool, a strong acid washing pool and a reuse pool arranged inside the tank body in sequence, and a compensation waterway is arranged at the top of the weak acid washing pool, the strong acid washing pool and the reuse pool. The device can realize the enrichment of heavy metal mercury ions and non-mercury ions respectively, and the treated sewage can be recycled.

The present invention discloses a nanocomposite material, a preparation method and its application in the colorimetric detection of metallic mercury ions, which belongs to the field of preparation and application of nanocomposite materials. The present invention prepares N, S co-doped carbon / Co6Ni3S8 (NSC / Co6Ni3S8) nanocomposite material by sol-gel method to study the catalytic performance. Through nitrogen adsorption and desorption experiments and Raman spectroscopy tests, it was found that NSC / Co6Ni3S8 has a large specific surface area and an amorphous carbon structure that is conducive to catalysis. After enzyme-like experimental evaluation, it was verified that NSC / Co6Ni3S8 has oxidase-like activity. After method evaluation experiments and other metal ion interference experiments, it was concluded that the colorimetric detection method based on the color development of substrates catalyzed by NSC / Co6Ni3S8 nanoenzymes showed excellent specificity, a linear range of 10-100μg / L, and a detection limit as low as 3μg / L, which meets the detection limit required for actual monitoring and has good practical application value. Combined with the smart APP, a real-time colorimetric detection method for Hg in river water was successfully constructed. 2+ platform.

The invention relates to the technical field of cholesterol preparation, and discloses a bilirubin mercury removal method which comprises the following steps: 1) preparing a bilirubin calcium salt or a bilirubin crude product into a sodium bilirubin aqueous solution; 2) adding activated carbon into the sodium bilirubin aqueous solution for primary adsorption, and performing solid-liquid separation to obtain a primary purified solution and primary adsorption activated carbon; 3) diluting the primary purified solution with water, adding activated carbon for secondary adsorption, and performing solid-liquid separation to obtain a secondary purified solution; 4, hydrochloric acid is added into the secondary purified solution for acidification, then chloroform is used for extraction, reduced pressure distillation is carried out for solvent separation, and then bilirubin is obtained.By means of the method, metal mercury in bilirubin can be effectively removed, the mercury content is controlled not to exceed 0.2 mg / Kg, and meanwhile the yield of bilirubin is guaranteed.

The invention provides a method for recovering lead, selenium and mercury in nonferrous smelting acid mud, which belongs to the technical field of comprehensive utilization of resources and comprises the following steps of: leaching the nonferrous smelting acid mud by using a sodium chloride solution, and filtering to obtain lead-containing liquid and lead-removed slag; adding a lead precipitating agent into the lead-containing liquid to react, and filtering to obtain lead hydroxide and lead-precipitated liquid; hydrochloric acid and an oxidizing agent are added into the deleading slag for leaching, and then filtering is conducted to obtain oxidation leaching liquid; adding a reducing agent into the oxidation leachate for reaction, and filtering to obtain reducing slag; adding a leaching agent into the reducing slag for leaching, and filtering to obtain leaching slag and leaching liquid; adding sulfuric acid into the leachate to acidify and reduce, and filtering to obtain crude selenium and acidified liquid; adding lime and sodium hydroxide into the leaching residues, and carrying out pyrogenic distillation to obtain metal mercury and distillation residues; adding sulfuric acid and an oxidizing agent into the distillation residues, leaching, and filtering to obtain leached liquid; and adding a reducing agent into the leached liquid for reduction, and filtering to obtain crude selenium. The method for recycling lead, selenium and mercury in nonferrous smelting acid mud is easy to operate, economical, environmentally friendly and capable of achieving efficient recycling of lead, selenium and mercury.

The invention relates to a method for analyzing a mercury chemical phase in mercury-containing waste, and belongs to the technical field of chemical phase analysis of metallurgical products. Deionized water is used as a leaching agent, mercuric chloride in minerals is leached, and the content of mercury in the minerals is measured; then maleic acid is used as a leaching agent, mercuric oxide and mercuric sulfate phases in the minerals are leached out, and the content of mercury in the mercuric oxide and mercuric sulfate phases is measured; then hydrochloric acid is used as a leaching agent, mercurous chloride in the minerals is leached out, and the content of mercury in the minerals is measured; then, nitric acid is used as a leaching agent to leach the metal mercury phase in the mineral, and the content of mercury in the metal mercury phase is measured; a sodium sulfide-sodium hydroxide mixed solution serves as a leaching agent, mercuric sulfide phases in the minerals are leached out, and the content of mercury in the mercuric sulfide phases is measured; alkali is added into the residues, mixing and heating are conducted, mercury selenide and mercury telluride are converted into mercury oxide, maleic acid serves as a leaching agent, namely mercury existing in the mercury selenide phase and the mercury telluride phase in the mineral is obtained, and the content of the mercury is measured. The method can be used for accurately analyzing the contents of various mercury phases in the mineral.

The invention belongs to the field of metallurgy, and particularly relates to a method for recovering selenium and mercury from a lead filter cake, which comprises the following steps: (1) leaching; (2) selenium reduction; (3) neutralizing; and (4) mercury precipitation. Hg in the lead filter cake is mainly Hg (metallic mercury), HgS (cinnabar), HgSe (mercury selenide) and HgCl (mercuric chloride), and Se is mainly Se (elemental selenium), SeO (selenium dioxide), PbSe (lead selenide) and CuSe (copper selenide), the scheme comprises the following steps: extracting selenium and mercury in the lead filter cake by adopting a leaching system consisting of hydrochloric acid and hydrogen peroxide, oxidizing and dissolving out selenium and mercury in the lead filter cake by utilizing the strong oxidizing property of Cl2 generated by hydrogen peroxide and HCl, and separating the selenium and mercury from the lead filter cake. And the leaching rates of selenium and mercury are greatly improved.

This invention belongs to the field of isotope separation technology, specifically disclosing a method for lithium isotope separation. Addressing the significant risks to the ecological environment and occupational health posed by existing lithium amalgam methods due to the use of large quantities of highly toxic metallic mercury, and the limitation of insufficient mercury availability hindering large-scale production to meet the increasing demand for lithium isotope products, this invention proposes a safe, efficient, and industrially viable non-mercury-based lithium isotope separation method. This method is a liquid-liquid extraction method based on isotope exchange reactions between molten salt and liquid metal. The basic principle utilizes two stable isotopes of lithium. 6 Li and 7 The difference in the partition coefficient of Li between the liquid metal phase and the molten salt phase. The single-stage separation coefficient α of this method can meet the requirements of the single-stage separation factor for the industrialization of chemical exchange method (α≥1.02), and can be realized by laboratory heating furnace or scaled up by high-temperature extraction tower, providing a new technical route for lithium isotope separation.

The invention discloses an online water quality monitoring device and a monitoring method for heavy metal mercury, which relates to the technical field of water quality monitoring, and comprises a detection box, a protective cover and a panel are installed above the detection box, a removable sampling tube and a digestion tube are installed inside the detection box, a solution box and a feeding pump are installed inside the detection box, the feeding pump pumps the water sample in the sampling tube into the digestion tube, a solution pump is installed on the solution box, the solution pump pumps the solution in the solution box into the digestion tube, a sampling mechanism is installed on the digestion tube, the sampling mechanism transports the doped water sample inside the digestion tube to a spectral analysis and determination system, the spectral analysis and determination system determines the mercury content of the doped water sample, and the spectral analysis and determination system is electrically connected to the control system inside the panel. The spectral analysis and determination system feeds back the analysis and determination results to the control system, and the control system displays the determination results through the panel to realize online monitoring of the mercury content.