82 results about "Thallium" patented technology

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 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 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 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.

The invention discloses a method for measuring gallium, germanium, silver, indium, tellurium and thallium in nickel, and particularly relates to the technical field of metal trace element measurement. The method comprises the following steps: preparing a sample, preparing a sample blank solution and a sample solution, preparing a standard solution, preparing a working curve solution, drawing a working curve by adopting an inductively coupled plasma mass spectrometer, measuring the sample, processing experimental data and the like. After the interference of the nickel matrix is eliminated, the contents of gallium, germanium, silver, indium, tellurium and thallium are directly determined by the inductively coupled plasma mass spectrometry, so that the analysis speed is high, the detection limit is low, the detection result is accurate and reliable, the relative standard deviation is low, the standard addition recovery rate of a sample is high, and the contents of gallium, germanium, silver, indium, tellurium and thallium in the sample can be rapidly and accurately determined.

The invention relates to the technical field of environmental engineering water treatment, in particular to a method for removing thallium element in water through modified zeolite. The invention aims to solve the technical bottlenecks that when the existing zeolite adsorbent is used for removing thallium, solid-liquid separation is difficult, and the selective adsorption capacity on trace thallium is limited. Therefore, the invention creatively provides a composite treatment method integrating magnetic separation, multistage pore channel adsorption and biological enhancement. The preparation method is characterized in that firstly, a core-shell structure composite material with magnetic Fe3O4 as a core, natural zeolite as a middle layer and an MOF material as a shell layer is prepared through a hydrothermal synthesis and coprecipitation technology, and the material has magnetic response, high specific surface area and high affinity to thallium ions; secondly, performing functional modification on the surface of the composite material, and directionally mounting a specific thallium removal biological membrane to construct an adsorption-biotransformation synergistic system;

The invention provides a method for preparing high-purity indium through vacuum distillation coupled zone melting, and belongs to the technical field of high-purity indium preparation. The invention provides a three-step synergistic preparation method of high-purity indium, which comprises the following steps: firstly, carrying out primary purification on raw materials based on the physical difference of saturated vapor pressure of each component by adopting a vacuum distillation technology, removing most conventional impurities and providing a clean matrix; then, aiming at the stubborn impurity thallium which cannot be removed by vacuum distillation, selectively oxidizing and extracting the stubborn impurity thallium in a molten salt-metal system by utilizing the electrochemical potential difference between the stubborn impurity thallium and indium, and replacing the thallium with bismuth which is easy to subsequently treat through impurity replacement; and finally, performing final fine purification by adopting zone melting, and enriching all residual trace impurities including bismuth to the ingot tail and cutting off through multiple times of directional solidification on the basis of a solute segregation principle, so as to obtain high-purity indium.

The invention belongs to the field of solid waste treatment, and particularly relates to a method for selectively extracting and preparing metal thallium from a thallium-containing material, which comprises the following steps: carrying out reduction alkaline leaching on the thallium-containing material to obtain a Tl < + > alkaline leaching solution; the Tl < + > alkaline leaching solution is subjected to vulcanization precipitation, and Tl2S slag is obtained; the Tl2S slag is subjected to potential-controlled oxidation acid leaching, negative-valence sulfur in the Tl2S slag is selectively oxidized, and Tl < + > acid leaching liquid is obtained; mixing the Tl < + > pickle liquor and a compound additive, and then carrying out rotational flow electrodeposition treatment to obtain metal thallium and a liquid after rotational flow electrodeposition; the cathode material in the rotational flow electrodeposition is an aluminum plate, a copper plate or a titanium plate; the compound additive comprises a component A and a component B, and the component A comprises a Tl liquefying agent; the component B comprises at least one of gallic acid, benzalacetone, benzophenone, bone glue, polyether, FES-993 and quaternary ammonium salt; and the current density of the rotational flow electrodeposition is 50-500A / m < 2 >. According to the synergistic process, high-quality metal thallium can be efficiently recycled.

The invention relates to the technical field of chemical analysis, in particular to a method for simultaneously detecting cadmium, tin, mercury, thallium and lead in a water sample, which adopts solid phase extraction-high performance liquid chromatography-inductively coupled plasma mass spectrometry to realize simultaneous enrichment and analysis of 13 forms of cadmium, tin, mercury, thallium and lead. The defect of low efficiency of single element sequence analysis is overcome; by optimizing online solid-phase extraction conditions and chromatographic separation parameters, the problems of high detection limit and insufficient sensitivity are solved, a feasible method is provided for simultaneous analysis of different forms of cadmium, tin, mercury, thallium and lead in the water sample, and the technical blank of simultaneous detection of forms of cadmium, tin, mercury, thallium and lead in the water sample is filled.

A scintillation crystal can include a cesium halide that is co-doped with thallium and another element. In an embodiment, the scintillation crystal can include CsI:Tl, Me, where Me represents co-doped Sb and Bi. In a particular embodiment, the scintillation crystal may have a cesium iodide host material, a first dopant including a thallium, a second dopant including an antimony, and a third dopant including a bismuth.

This invention belongs to the field of mine water treatment in metal mines, and specifically relates to a method for the deep purification treatment of thallium-containing metal mine wastewater. This method employs a combined process of "multi-element synergistic oxidation adsorption + composite sulfide precipitation + staged flocculation precipitation + activated carbon deep adsorption." It utilizes the synergistic effect of potassium permanganate, sodium hypochlorite, and ozone as a ternary oxidant to catalyze oxidation, generating MnO2 colloids with high adsorption capacity. This strongly adsorbs thallium, preventing its reduction rebound and amplifying the subsequent treatment effect through adsorption enrichment. Further treatment with a compound sulfide agent and a core-shell structured composite flocculant allows for multiple rounds of adsorption and precipitation, increasing the removal efficiency of low-concentration thallium to over 96%, and reducing the thallium concentration in the effluent to below 0.1 μg / L.

The invention discloses a preparation method of a manganese ferrite and manganese dioxide core-shell material based on monatomic cobalt doping and application of the manganese ferrite and manganese dioxide core-shell material in efficient generation of Fe (IV) targeted thallium removal, and belongs to the field of environmental functional materials and advanced oxidation treatment of heavy metal wastewater. The invention aims to solve the problem of low removal rate of thallium in wastewater. The method comprises the following steps: 1, preparing ZIF-8 (at) Co; 2, a Co-N4 / MnFe2O4 core is prepared, and the Co-N4 / (3) preparing Co-N4 / MnFe2O4 (at) MnO2; 4, PSS surface modification; and 5, loading and sealing double oxidants. Through Co-N4 / Mn < 2 + > dual catalysis and KHSO5 / CaO2 synergistic oxidation, the yield gt of Fe (IV) is realized in a complex water body; 90% and the Tl removal rate gt; 99.9% by weight; the PSS modified shell layer shields hardness interference, the TiO2-x / PDA layer photolyzes organic matters, the cost is low, and the bottleneck of the existing thallium removal technology is broken through.

This invention discloses a preparation method and application of a material for selectively removing thallium ions from water, belonging to the field of environmental protection technology. The invention provides a material for selectively removing thallium ions from water, comprising a carrier and a composite material of graphitic carbon nitride and perovskite titanate loaded on the carrier; the carrier is carbon nanofiber; the composite material of graphitic carbon nitride and perovskite titanate is a mixed powder of graphitic carbon nitride and perovskite titanate; the perovskite titanate has a cubic crystal structure with space group Pmm; the content of graphitic carbon nitride is 4~10wt%, and the content of perovskite titanate is 25~40wt%. The material for selectively removing thallium ions from water provided by this invention, due to the stable coordination between perovskite titanate and graphitic carbon nitride with thallium ions, enhances the adsorption force and selectivity for thallium ions, resulting in more stable binding, better selectivity, and higher removal efficiency.