101 results about "Thallium" patented technology

The invention relates to the technical field of thallium recovery and treatment, in particular to a method for efficiently recovering thallium from a complex solution. The invention discloses a method for efficiently recovering thallium in a complex solution. The method comprises the following steps: S1, multi-stage replacement; a metal displacer is added into the thallium-containing feed liquid, a multi-stage displacement reaction is carried out, and the pH value during the multi-stage displacement reaction is 3-5; after the reaction is finished, separating to obtain thallium-removed feed liquid and thallium-containing solid; s2, dissolving; dissolving the thallium-containing solid with an inorganic acid to form a thallium-containing solution; s3, oxidizing and precipitating; and adding an oxidizing agent into the thallium-containing solution, adjusting the pH value of the solution to 1-3 after the oxidation is finished, generating a precipitate, and separating to obtain a thallium hydroxide solid. The method disclosed by the invention is wide in application range, can be used for treating thallium-containing wastewater with various concentrations, is simple in process and easy to implement, and meanwhile, thallium and other valuable metals can be recycled, so that efficient recovery and utilization of resources are realized.

The invention discloses a step-by-step removal method for thallium and arsenic in lead-zinc smelting waste acid, which comprises the following steps: adding a calcium-containing precipitant into the lead-zinc smelting waste acid for neutralization and precipitation to obtain a neutralization and precipitation filtrate and a neutralization and precipitation filter residue; adding a calcium remover into the neutralized and precipitated filtrate to carry out calcium removal reaction to obtain calcium-removed filtrate and calcium-removed slag; adding an oxidizing agent I and a catalyst into the calcium-removed filtrate, controlling the pH value of the oxidation process to be 9.0-11.5 by using alkali liquor, carrying out selective oxidation thallium removal, and filtering to obtain thallium-removed filtrate and thallium-removed slag; and adding iron salt into the thallium-removed filtrate for deep arsenic removal to obtain effluent and arsenic-removed slag. According to the method, thallium and arsenic in the contaminated acid can be removed step by step, so that the concentration of arsenic and thallium in effluent stably reaches the standard for a long time while thallium slag and arsenic slag are separated.

The invention relates to the technical field of thallium element analysis and detection, in particular to an on-site analysis and detection device for thallium element in mine water. The water sample storage assembly is mounted on one side of the interior of the frame and is used for storing a mine water sample; the water sample collecting, storing, transferring and detecting functions are integrated, real-time detection can be conducted on a mine site, complexity and professional requirements of manual operation are reduced through automatic and integrated design, thallium elements in the water sample can be detected, sludge samples can be treated at the same time, and the water sample collecting, storing, transferring and detecting functions are achieved. More data support is provided for comprehensive evaluation of mine water, an organic matter adsorption plate, a molecular sieve and an aluminum oxide sieve treatment assembly are arranged to effectively remove organic matters and peculiar smell in a water sample, and meanwhile, the detection accuracy is improved.

The invention relates to the technical field of metal smelting and impurity removal, in particular to a method for solidifying heavy metal beryllium and thallium in the lithium extraction process of lepidolite ore. In the process of mixing and leaching the clinker of the lepidolite ore obtained by roasting with the sulfate method and water, the slurry is treated by adding the curing agent, and beryllium and thallium metal elements are adsorbed and retained in the leaching residues in the form of precipitates; therefore, the problem of environmental pollution caused by secondary leaching of beryllium and thallium elements in the leaching residues due to factors such as rainwater in the subsequent landfill treatment process is solved, the beryllium and thallium elements in the lithium residues are solidified in the lithium extraction process to become common solid waste, and extra resource consumption caused by secondary processing solidification after the lithium residues are output is reduced. The cost is reduced and the efficiency is improved for enterprises. Meanwhile, the curing agent used in the method is simple in component and small in dosage, and the resource cost can be saved under the condition that the beryllium and thallium curing effect is guaranteed.

The invention discloses an ultratrace mercury isotope analysis method, and relates to the technical field of environmental analysis. The method comprises the following steps: purging a liquid sample to be detected by nitrogen in a stannous chloride atmosphere, and trapping and concentrating mercury into a gold trapping tube; pyrolyzing the pyrolytic gold trapping tube to release mercury vapor; pyrolytic mercury vapor and thallium isotope internal standard aerosol are mixed to serve as a sample injection sample, and the sample injection sample is introduced into a multi-receiver inductively coupled plasma mass spectrometry; acquiring a mercury instantaneous signal and a thallium isotope signal; and calculating the mercury isotope ratio by adopting least square linear regression fitting in combination with a thallium internal standard ratio correction algorithm. According to the method, the instantaneous mercury isotope signal is generated by online combination of gold trapping and multi-receiver inductively coupled plasma mass spectrometry, the instantaneous signal is strategically collected and processed, the determination concentration of isotope analysis can be greatly reduced, the sensitivity of the method is remarkably improved, and direct determination of mercury isotope composition in a water sample with the concentration of 10 ng L <-1 > is met.

The invention provides a thallium removal method for a thallium-containing solution in a process of extracting lithium from lepidolite, and the method comprises the following steps: pumping the thallium-containing solution into a first-stage reaction kettle, adding a first mixing agent, stirring for reaction, and filtering to obtain a first-stage thallium-removed solution and first-stage thallium-removed slag; and pumping the first-stage thallium removal liquid into a second-stage reaction kettle, adding a second mixing agent, stirring for reaction, standing, and filtering to obtain second-stage thallium removal liquid and second-stage thallium removal slag. According to the thallium removal method for the thallium-containing solution in the lithium extraction process of lepidolite, thallium removal is carried out on the thallium-containing solution in two steps, the first step is carried out through the first mixing agent, the second step is carried out through the second mixing agent, no organic flocculant is used, rapid sedimentation can be achieved, no harmful gas is generated, the sludge amount is small, the process is short, and lithium loss is low; and efficient thallium removal in the process of extracting lithium from lepidolite is realized.

The invention relates to the technical field of heavy metal treatment, in particular to a thallium-containing waste residue treatment method, a thallium-containing waste residue geopolymer and application. The treatment method comprises the following steps: preparing a mixed solution containing an alkaline reagent and an oxidizing agent; adding thallium-containing waste residues and optional correction auxiliary materials into the mixed solution to obtain slurry; maintaining the slurry to obtain a thallium-containing waste residue geopolymer; wherein the correction auxiliary material comprises silicon dioxide and / or aluminum oxide. The thallium-containing waste residue geopolymer is obtained by taking the thallium-containing waste residue as a raw material through a polymerization reaction. The treatment method is excellent in thallium solidifying effect, and the obtained thallium-containing waste residue geopolymer is good in mechanical property and can be suitable for low-cost environment-friendly building materials or landfill materials serving as solid wastes, so that harmless and resourceful treatment of the thallium-containing waste residues is achieved, and the treatment method has economic and environment-friendly double benefits.

The invention belongs to the technical field of rare earth mine water environment comprehensive treatment, and particularly discloses a collaborative thallium removal and rare earth recovery method for rare earth mine wastewater. The collaborative thallium removal and rare earth recovery method comprises the following steps: concentrating and separating ore leaching wastewater through a nanofiltration membrane to obtain a concentrated solution and a filtrate; carrying out rare earth recovery treatment on the concentrated solution, and carrying out heavy metal removal treatment on the filtrate; wherein the rare earth recovery treatment comprises the following steps: adding an organic acid solution to carry out precipitation reaction to obtain rare earth salt precipitate and supernate, carrying out secondary concentration separation on the supernate through a nanofiltration membrane to obtain concentrated solution and filtrate, and then carrying out rare earth recovery treatment and heavy metal removal treatment again. The method provided by the invention can realize heavy metal removal and rare earth resource recovery, effectively improves the rare earth recovery rate and the heavy metal removal efficiency, and has important application prospects.

The invention discloses a sustained-release wrapping material for thallium immobilization, a preparation method and application, the wrapping material uses a mixture composed of an aluminosilicate carrier and an organic sulfur chelating agent loaded on the carrier as a core-spun material, and hydroxide and / or carbonate as a coating material to wrap the core-spun material. The preparation method comprises the following steps: firstly, adding the organic sulfur chelating agent into the aluminosilicate carrier, adding water, uniformly stirring, then adding the binder, and carrying out primary granulation and drying to obtain the core-spun material; and mixing the hydroxide and / or carbonate with the core-spun material, adding water to prepare slurry, and performing secondary granulation and drying. The slow-release wrapping material can efficiently act on the lepidolite tailings for a long time, so that the leaching toxicity of thallium in the lepidolite tailings is always maintained at a relatively low level, and the slow-release wrapping material has the characteristics of high stabilization rate, stable performance, long-term effectiveness, easiness in storage and easiness in use. The slow-release wrapping material is wide in application range, is not only suitable for thallium-containing lepidolite tailings, but also suitable for thallium-containing sludge, thallium-containing wastewater and the like, and is short in production process flow, simple to use and operate and wide in application prospect.

The invention provides a selective adsorption thallium removal agent and a preparation method thereof, and belongs to the technical field of adsorption materials. The thallium removal agent provided by the invention comprises bentonite and Prussian blue loaded on the bentonite, the mass of the Prussian blue accounts for 10-30% of the mass of the bentonite, the crystal space after the bentonite absorbs water and expands is fully utilized, and Prussian blue nanoparticles are uniformly dispersed between layers and on the surface of the bentonite, so that the thallium removal agent is prepared. The adsorption sites of Prussian blue and bentonite are fully exerted, and the adsorbability of thallium ions in wastewater is greatly improved.

The invention discloses a preparation method of manganese-based hydrotalcite and application of the manganese-based hydrotalcite in removing thallium pollution. According to the invention, the manganese-based hydrotalcite is prepared by adopting a nucleation crystallization method by accurately regulating and controlling the hydrotalcite laminate element composition, the interlayer ion species and the atomic proportion. The prepared manganese-based hydrotalcite realizes high-selectivity specific adsorption of thallium pollutants through surface hydroxyl complexing, interlayer anion exchange, electrostatic interaction and oxidation-reduction reaction. Even in a complex adsorption environment, such as interference of different pH values, various common metal cations and organic matters, the manganese-based hydrotalcite can still keep the adsorption efficiency higher than 95%, and in a natural water environment, thallium pollutants can be effectively reduced to be lower than the national surface water discharge standard (0.1 microgram / L).

The invention discloses a fluorine-doped alpha-type manganese dioxide nanotube, a preparation method thereof and application of the fluorine-doped alpha-type manganese dioxide nanotube as a thallium adsorption material, and belongs to the technical field of thallium wastewater treatment. A manganese source solution, a fluorine source solution and an inorganic acid are mixed and then subjected to a hydrothermal reaction, and the fluorine-doped alpha-phase manganese dioxide nanotube is obtained, has the advantages of being large in specific surface area, developed in pore structure, rich in surface active sites and the like, can be used as a thallium adsorption material for repairing thallium-polluted water, can quickly, efficiently and selectively remove thallium ions in wastewater, and has a good application prospect. And the purpose of water purification is achieved.

The invention belongs to the technical field of analytical chemistry, and particularly relates to application of a sulfydryl modified magnetic material in thallium enrichment and separation, namely a sample pretreatment method for detecting thallium in a water body. The sulfydryl modified magnetic material is prepared by grafting cystamine to the surface of a magnetic material through amidation reaction and then opening a disulfide bond by using a reducing agent to expose sulfydryl. It is found that the sulfydryl modified magnetic material can rapidly and efficiently conduct selective enrichment on trace thallium ions in a large-volume water sample, the sulfydryl modified magnetic material is used for pretreatment of thallium detection such as ICP-MS, AAS and ICP-OES and pretreatment matched with a portable on-site thallium detector, a more accurate thallium content detection result can be obtained, the detection sensitivity is greatly improved, and the method is suitable for large-scale popularization and application. Meanwhile, operation is easy, treatment time is short, waste liquid and waste gas are not generated, and cost is low.

A quantitative detection method of thallium content in converter graphite ball, steps include: 1) the pretreatment of converter graphite ball; 2) the preparation of standard solution series; 3) the detection of thallium content in converter graphite ball.The application finds that the suitable pretreatment method of converter graphite ball is carbon removal by burning, and then high-chloric acid and dilute nitric acid are used to dissolve salt, by which the converter graphite ball can be completely dissolved, thereby the stability of quantitative determination of thallium content in converter graphite ball is improved, the pretreatment method is simple, fast and operable; the method is suitable for the quantitative detection of thallium content in converter graphite ball with thallium content not less than 0.0062 μg / L, the recovery rate of thallium is as high as 99.1%, the analysis accuracy is high, the detection lower limit is as low as ppb level, the sensitivity is high, and the method has the advantages of simple operation, simple analysis condition and low labor intensity.Therefore, the application has significant economic benefits and the advantages of simplicity and economy.

The invention discloses a method suitable for on-site analysis of the valence state of thallium in water. The method comprises the following operation steps: step 1, collecting and separating a water sample; step 2, acidizing treatment; 3, Tl (I) and Tl (III) are separated; 4, total thallium is measured; step 5, Tl (I) determination; the invention relates to the technical field of atomic spectrum metal element analysis, and the method has the beneficial effects that by combining an electrochemical separation technology with a Chelex-100 solid-phase extraction column and cooperating with a portable liquid cathode glow discharge thallium measurement instrument, high-sensitivity field detection of Tl (I) and Tl (III) is realized, the detection limit is lower than 1.0 g / L, and the repeatability is RSDlt; the analysis period of a single sample is less than or equal to 30 minutes, the weight of equipment is only 5kg, battery power supply is supported, and acidification-separation-detection integrated operation can be completed outdoors without professional laboratory conditions.

The present invention discloses a method for treating acid wastewater containing thallium and arsenic, comprising the following steps: S1 adding the acid wastewater to limestone for neutralization, and controlling the pH value of the effluent after filtration to be 2-4; S2 feeding the effluent in step S1 into the first reaction tank of the first-stage oxidation section, adding ferrous sulfate in the first reaction tank, and the effluent enters the second reaction tank of the first-stage oxidation section, and adding hydrogen peroxide in the second reaction tank; S3 feeding the effluent from the second reaction tank of the first-stage oxidation section into the first-stage neutralization tank, adding lime milk, and controlling the pH value of the effluent after filtration to be 8.5-9.5; S4 feeding the effluent from the first-stage neutralization section in step S3 into the first reaction tank of the second-stage oxidation section, adding lime milk and ferrous sulfate, the effluent is fed into the second reaction tank of the second-stage oxidation section, introducing compressed air, controlling the pH value to be 8.5-9.5, and filtering after the reaction to obtain the treated acid wastewater. The method of the present invention can effectively remove thallium and arsenic in the acid wastewater, and the removal rate can reach more than 99.9%.

The invention provides a method for rapidly detecting the content of thallium in ore and an occurrence state analysis method. The method for rapidly detecting the thallium content in the ore comprises the following steps: S1, providing a plurality of ore samples; measuring the manganese element content, the iron element content and the thallium element content of the multiple ore samples, and analyzing the mass ratio of the manganese element content to the iron element content in each ore sample; according to the mass ratio of the manganese element content to the iron element content and the thallium element content in the multiple ore samples, the quantitative relation between the mass ratio of the manganese element content to the iron element content and the thallium element content is obtained through fitting; s2, providing an ore sample to be detected; determining the manganese element content and the iron element content of the to-be-detected ore sample, and analyzing the mass ratio of the manganese element content to the iron element content; and analyzing the calculated value of the thallium content in the to-be-detected ore sample according to the obtained mass ratio and the quantitative relationship. According to the method, the thallium content in the ore can be rapidly and relatively accurately detected.

The present application discloses an online monitoring system for total thallium in water quality. The online monitoring system for total thallium in water quality includes: a water quality sampling module for periodically sampling water quality samples; a total thallium detection module for detecting the total thallium content in the water quality samples according to a preset spectrophotometry based on o-hydroxybenzenediazoaminoazobenzene; and a result output module for generating and outputting the monitoring result of total thallium in water quality according to the total thallium content. The present application solves the technical problem of poor timeliness in monitoring total thallium in water quality in the prior art.

The invention provides a machine learning-based arsenic and thallium form prediction method in a non-ferrous smelting arsenic and thallium-containing material and application thereof. The method comprises the following steps: S1, collecting arsenic content data, total arsenic amount and recovery rate data of the arsenic and thallium-containing material in each extraction step from a step-by-step form extraction experiment of the non-ferrous smelting arsenic and thallium-containing material; s2, preprocessing the sample data set to obtain a preprocessed sample data set; and S3, randomly dividing the preprocessed sample data set into a training set and a test set of a machine learning model, training the machine learning model by using the data of the training set, and evaluating the performance of the model through the test set to obtain an arsenic thallium form prediction model. Through combination of step-by-step form extraction and a machine learning model, various form changes of heavy metals such as arsenic and thallium under different smelting conditions can be predicted.

The invention relates to a device for removing thallium metal in water resources, which comprises a barrel body I provided with a cover plate, a barrel body II arranged at the bottom of the cover plate, a necking part arranged at the bottom of the barrel body II, an extrusion mechanism arranged in the necking part, a liquid outlet mechanism arranged on the outer side of the necking part, a barrel body arranged on the cover plate, a hole-shaped structure arranged on the side wall of the barrel body in the barrel body II, and a water outlet mechanism arranged on the side wall of the barrel body in the barrel body II. Discharging openings are formed in the side walls of the upper end and the lower end of the barrel body, a material collecting mechanism I and a material collecting mechanism II corresponding to the discharging openings are further arranged at the upper end and the lower end of the barrel body, a cleaning seat is arranged in the barrel body, a liquid inlet pipe is arranged on the barrel body above the cleaning seat, a screw driven by a motor is further arranged in the cleaning seat, and the liquid inlet pipe is communicated with the liquid inlet pipe. The bottom in the necking part is provided with a stirring paddle I fixed to the screw rod, the bottom end of the screw rod extends to the bottom in the barrel body I and is movably connected with a cleaning mechanism, a liquid inlet mechanism is arranged in the screw rod, and the bottom of the necking part is provided with a circulating mechanism connected with the liquid inlet mechanism. The device is simple in structure and convenient to use.

The present invention relates to the technical field of thallium recovery and treatment, and particularly to a method for efficiently recovering thallium from complex solutions. The present application discloses a method for efficiently recovering thallium from complex solutions, comprising the following steps: S1. Multi-stage replacement; adding a metal replacement agent to the thallium-containing feed liquid for multi-stage replacement reaction, with the pH value during the multi-stage replacement reaction being 3-5; after the reaction is completed, separation is carried out to obtain a thallium-removed feed liquid and a thallium-containing solid; S2. Dissolution; using an inorganic acid to dissolve the thallium-containing solid to form a thallium-containing solution; S3. Oxidation precipitation; adding an oxidizing agent to the thallium-containing solution, after the oxidation is completed, adjusting the pH value of the solution to 1-3 to generate a precipitate, and carrying out separation to obtain thallium hydroxide solid. The method described in the present application has a wide range of applications, can be used to treat thallium-containing wastewater with various concentrations, has a simple process and is easy to implement. At the same time, thallium and other valuable metals can be recovered and utilized, realizing the efficient recovery and utilization of resources.

The invention discloses a method for comprehensively enriching and recovering cadmium and thallium from complex arsenic sulfide slag, belongs to the technical field of harmless treatment of dangerous waste residues and resource recovery of rare and noble metals, and aims to solve the problems that the existing process is difficult to realize fractional separation of fluorine, chlorine, arsenic, cadmium and thallium in the arsenic sulfide slag, and the thallium is low in recovery rate and insufficient in purity. According to the method, fluorine and chlorine and thallium arsenic-cadmium lead are separated through graded alkaline leaching; the cadmium-containing lead slag is subjected to zinc electrodeposition waste liquid acid leaching and sodium sulfite and citric acid purification, and cadmium-containing coarse filtrate is obtained; adjusting the pH value of the thallium-containing arsenic liquid step by step, and adding sodium hydrosulfide for precipitation to obtain high-purity thallium slag; according to the method, no toxic gas is generated, the emission of wastewater is reduced by 80%, conventional equipment is used, industrialization is easy, and unification of harmlessness of hazardous waste and efficient recycling of resources is achieved.

The application discloses a mineral adsorbent and a preparation method thereof. The prepared mineral adsorbent is composed of illite powder, zeolite powder, fly ash, coal gangue powder, dolomite powder and calcium carbonate. The preparation method comprises the following steps: S1, crushing illite, zeolite, coal gangue and dolomite to obtain illite powder, zeolite powder, coal gangue powder and dolomite powder; S2, putting the illite powder, zeolite powder, fly ash, coal gangue powder, dolomite powder and calcium carbonate into a mixer to wet grind to obtain mixed wet materials; and S3, putting the mixed wet materials into a calciner to calcine to obtain the powder-shaped mineral adsorbent. The application has a high removal rate for pollutants in waste gas, can effectively reduce the concentration of dioxin, particulate matter, nitrogen oxides, sulfur dioxide, carbon monoxide, mercury, cadmium, thallium and compounds thereof, antimony, arsenic, lead, chromium, copper, cobalt, manganese and nickel compounds in incineration waste gas.

The invention relates to an electro-deposition method for preparing a thallium solid target, compared with the prior art, a novel electro-deposition liquid component is disclosed under the condition that no toxic additive is introduced, and an obtained solid target sheet is regular in shape, flat in plating layer, compact in structure and suitable for follow-up accelerator targeting. Besides, an oxidation experiment shows that the prepared thallium target is slow in oxidation speed, the oxidation risk before targeting operation is reduced, and the use efficiency of the thallium solid target is improved.

The application belongs to the technical field of solid waste treatment, and particularly relates to a method for synergistically treating beryllium and thallium-containing waste residues. The method comprises the following steps: pretreating the beryllium and thallium-containing waste residues to obtain homogenized slag; mixing the homogenized slag with inorganic mineral materials, wherein the inorganic mineral materials comprise at least one of fly ash, zeolite and steel slag; adding water to obtain a mixed system containing the homogenized slag and the inorganic mineral materials, stirring, and curing the mixed system. The method can simultaneously and efficiently treat beryllium and thallium in the waste residues, and has mild reaction conditions and no secondary pollution.

The invention provides an intelligent identification and optimization system and method for thallium enrichment and cadmium recovery in the zinc hydrometallurgy process, and belongs to the field of non-ferrous metal metallurgy and intelligent optimization control. The system comprises a thallium enrichment process intelligent optimization module based on incoming material identification and a cadmium recovery process target optimization module. According to the method, thallium content data of mixed zinc concentrate and thallium-containing and cadmium-containing slag in MES are grabbed, 8 g / t, 15 g / t and 200 g / t are taken as threshold values respectively, thallium removal and cadmium recovery processes are intelligently matched, after process rationality verification, a multi-objective function is established through a deep learning model, and an optimal operation scheme is solved by adopting an NSGA-II algorithm. The method adapts to the raw material thallium content fluctuation scene, no toxic reagent is introduced, collaborative optimization of thallium enrichment and cadmium recovery is achieved, the process stability and economical efficiency are improved, and cost reduction and efficiency improvement are achieved for enterprises.

Water containing less than 60 Hz of minerals is disclosed. The water containing less than 60 Hz of minerals contains, as active ingredients, 0.04-34 parts by weight of minerals from which at least one electron has been removed, among germanium (Ge), silver (Ag), iridium (Ir), nickel (Ni), palladium (Pd), tantalum (Ta), antimony (Sb), zinc (Zn), indium (In), boron (B), astatine (At), thallium (Tl), magnesium carbonate (MgCO3), tin (Sn), iron (Fe), calcium sulfide (CaS), molybdenum (Mo), chromium (Cr), sodium (Na), tungsten (W), gallium (Ga), strontium (Sr), potassium (K), beryllium (Be), barium (Ba), magnesium (Mg), scandium (Sc), yttrium (Y), calcium (Ca), titanium (Ti), vanadium (V), hafnium (Hf), bromine (Br), zirconium (Zr), copper (Cu), manganese (Mn), rubidium (Rb), technetium (Tc), platinum (Pt), niobium (Nb), gold (Au), phosphate (Pi), rhenium (Re), ruthenium (Ru), cobalt (Co), zinc oxide (ZnO), aluminum (Al), selenium (Se), bismuth (Bi), phosphorus (P), rhodium (Rh), silicon (Si), iodine (I), tellurium (Te), sulfur (S), lithium (Li), osmium (Os), magnesium hydroxide (Mg(OH)2), and cesium (Cs), mixed with 100 parts by weight of water, wherein there are at least 5 types of minerals.

The invention belongs to the technical field of harmless treatment of hazardous waste residues and resource recovery of rare and noble metals, and particularly relates to a method for selectively recovering thallium from zinc-cadmium residues. The method comprises the following steps: 1) preparing zinc-cadmium slag and water into slurry according to a certain solid-to-liquid ratio, adding a sulfur-containing reducing agent and alkali, uniformly mixing, and heating to react for a certain time; (2) after the reaction is completed, solid-liquid separation is conducted, thallium-containing leaching liquid and treated tailings are obtained, and the tailings are zinc and cadmium residues and can be directly returned to the zinc and cadmium recycling procedure; and (3) zinc powder is added into the leachate for replacement, thallium is recycled from the leachate, then solid-liquid separation is conducted, thallium and zinc liquid are obtained through recycling, and the process can be returned to the zinc recycling procedure. On the basis of sulfur-containing reducing agent treatment, zinc powder replacement is combined, and monovalent thallium and trivalent thallium in the zinc-cadmium slag can be recovered together in the form of simple substances.

The invention provides a Tl-series superconducting thin film and a preparation method thereof, and belongs to the field of superconducting thin film materials. The preparation method of the Tl-series superconducting thin film provided by the invention comprises the following steps: mixing nitrate or acetate of metal, ethylenediaminetetraacetic acid, a water-soluble high-molecular polymer and water to obtain precursor sol; the metals are thallium, barium, calcium and copper; the molar ratio of thallium to barium to calcium to copper to ethylenediamine tetraacetic acid is (2-3): 2: 1: 2: (7-8); coating a substrate with the precursor sol to obtain a precursor film; and carrying out heat treatment on the precursor thin film in an oxygen atmosphere under a closed condition to obtain the Tl-series superconducting thin film. The Tl-series superconducting thin film obtained by the preparation method provided by the invention presents a Tl-2212 phase, no impurity phase is generated, and the critical transition temperature can reach 100K and is close to the Tl-2212 theoretical superconducting transition temperature.

The invention relates to a solid bubble type rubidium, cesium and thallium adsorbent as well as a preparation method and application thereof, belongs to the technical field of rubidium, cesium and thallium adsorption, and solves the problems of low adsorption efficiency, low capacity, complex process steps, environmental pollution and difficulty in recovery and regeneration when rubidium, cesium and thallium are extracted from Prussian blue (PB) and analogues (PBAs) thereof in the prior art. The method comprises the following steps: activating solid bubbles, and reacting with a silanization reagent; dipping the modified solid bubbles into a solution containing [Fe (CN) 6] < 3->, dropwise adding a transition metal salt solution, and reacting; the PB or PBAs adsorbent is grafted on the surface of the solid bubble matrix through in-situ growth, and the matrix is spherical and has a relatively high specific surface area, so that the dispersion of the adsorbent can be promoted, and the adsorption performance on rubidium, cesium and thallium is effectively improved; the recycling difficulty of the adsorbent can be reduced due to the characteristic of low density, the adsorbent is endowed with excellent cycling stability due to relatively high mechanical strength and a stable material, the adsorbent can be recycled for a long time, and the cost is reduced; the preparation method is simple and environment-friendly, and industrial application is easy to realize.