128 results about "Iron sulfide" patented technology

The present invention discloses a sulfurized nano zero-valent iron material, its preparation method and application, including: a core-shell structure sulfurized nano zero-valent iron material and a preparation method, the inner core of the sulfurized nano zero-valent iron is zero-valent iron, and the outer shell is Fe9S 10 , calculated by the mass of the sulfurized nano zero-valent iron, the mass percentage of zero-valent iron is 70-80%, and the mass percentage of the iron sulfide is 20-30%; the preparation method includes: placing iron powder in an H2S gas atmosphere for calcination, after the calcination is completed, cooling to room temperature to obtain the sulfurized nano zero-valent iron material. This material can be used for in-situ remediation of chlorinated hydrocarbon organic pollutants in groundwater. Compared with the prior art, the prepared sulfurized nano zero-valent iron is less likely to be oxidized and can overcome the problem of rapid passivation of nano zero-valent iron during the remediation process.

The invention provides a treatment method for low-grade multi-metal gold concentrate, and relates to the technical field of comprehensive utilization of minerals. According to the treatment method of the low-grade multi-metal gold concentrate, most of iron and copper form iron-copper matte through pyrogenic smelting, meanwhile, gold is captured into the iron-copper matte, then iron-copper matte powder is obtained after water quenching and ball milling, the iron-copper matte powder is subjected to oxidation ammonia leaching, copper in the iron-copper matte is extracted, and the iron-copper matte powder is subjected to oxidation ammonia leaching to obtain the low-grade multi-metal gold concentrate. The obtained copper-containing ammonia leaching liquid is subjected to a traditional extraction-reverse extraction-electrodeposition process to obtain an electrodeposited copper product, ammonia leaching residues obtained after copper extraction are subjected to cyanidation leaching, gold in the ammonia leaching residues is extracted, cyanidation liquid is subjected to a traditional gold extraction process to obtain a gold product, the cyanidation tailings mainly comprise iron sulfide, the content of iron and sulfur in the tailings is high, and the content of sulfur in the tailings is high. And the subsequent cinder can be directly sold as an iron-making raw material. The amount of iron-silicon slag generated by the method is extremely low, and compared with a traditional molten pool smelting method, the comprehensive utilization rate of iron in the multi-metal gold concentrate is greatly increased.

The invention provides a pharmaceutical wastewater treatment process. The pharmaceutical wastewater treatment process comprises the following steps: A1, pretreatment, A2, adsorption treatment, A3, oxidation treatment and A4, filtration treatment. In the step A2, a composite adsorbent comprising the following raw materials: attapulgite, activated carbon, carbon nanotubes, 4-carboxyphenylboronic acid, polyethyleneimine, sodium dithiocarbamate, epoxy resin E-44, deionized water and modified nano zero-valent iron is used, and self-repairing is realized through dynamic chemical bonds such as boric acid ester bonds, imine bonds and thiol-disulfide bonds; the adsorbent can be self-repaired during microscopic damage, so that the service life is prolonged, and relatively high adsorption capacity is kept. In the step A3, a gel microsphere oxidant comprising the following raw materials: hydrogen peroxide, potassium persulfate, copper-iron sulfide, nitrogen-doped carbon quantum dots, sodium alginate powder, sodium polyacrylate and a phosphate buffer solution is used, and efficient degradation is realized through a synergistic mechanism of free radical oxidation, non-free radical oxidation and photocatalysis.

The invention discloses a tetracycline hydrochloride-containing wastewater treatment method in the field of wastewater treatment, which comprises the following steps: introducing tetracycline hydrochloride-containing wastewater into a reactor, adding a multilevel structure iron and iron sulfide composite carbon material, and adjusting the system to a nearly neutral condition; then adding potassium peroxymonosulfate composite salt, starting a direct current system, and carrying out catalytic degradation reaction under specific current density; and finally recovering the catalyst through magnetic field separation. The preparation method comprises the following steps: grinding pyrite and hematite, ball-milling and mixing the ground pyrite and hematite with orange peel powder and sodium hydroxide, and carrying out microwave pyrolysis, acid washing and drying, hydrogen peroxide surface treatment and the like to obtain a final product. According to the method, efficient degradation of tetracycline hydrochloride under the neutral condition is achieved, the catalyst can be magnetically recycled, secondary pollution is avoided, and the method has the advantages of being low in cost, easy and convenient to operate, environmentally friendly and the like.

A nanocomposite material including iron sulfide (FeS2) nanoparticles, iron oxide (α-Fe2O3) nanoparticles, titanium dioxide (TiO2) nanoparticles, and graphitic carbon nitride (C3N4) nanosheets and a method of its preparation. The nanocomposite is used in a method of forming oxygen gas from water using an applied voltage and photoirradiation, a method of forming hydrogen gas from water using an applied voltage and photoirradiation, and a method of photodegrading organic pollutants using visible light photoirradiation.

The invention discloses a method for preparing a waste incineration flue gas demercuration adsorbent by utilizing microorganism induced corrosion waste battery slag, which comprises the following steps: firstly, preparing an SRB (sulfate reducing bacteria) seed culture medium by mixing SRB and an anaerobic culture medium, and then adding sulfur-rich waste battery slag into the SRB seed culture medium for anaerobic reaction; and after the reaction is finished, centrifuging, washing with deionized water and drying to obtain amorphous iron sulfide (FeSx) generated by microorganism induced corrosion. According to the method, the sulfate reducing bacteria culture medium is used as the precursor solution, the waste battery slag is subjected to anaerobic modification to prepare the mercury removal adsorbent, on one hand, high-valued and resource utilization of the sulfur-rich waste battery slag is achieved, and on the other hand, the method capable of rapidly, accurately and simply preparing the high-activity amorphous metal sulfide adsorbent in a large-scale mode is explored. Meanwhile, the type of the flue gas demercuration adsorbent is also expanded.

The invention discloses a method for removing iron and copper from molybdenite, which comprises the following steps: uniformly mixing the molybdenite and magnesium chloride, carrying out high-temperature vacuum melting, removing iron sulfide, copper oxide and other impurities in the molybdenite through vacuum chlorination melting, directly recycling magnesium chloride in a condensing disc in one step for reutilization, carrying out water leaching and acid leaching washing on roasting residues, and drying. Removing residual iron oxides and magnesium compounds generated by chlorination to obtain residues rich in molybdenum disulfide; according to the method, the iron and copper impurities in molybdenite are effectively removed in a vacuum chloridizing roasting and acid leaching mode, and the method has the advantages of being short in process, low in cost, high in metal recovery rate and small in environmental pollution.

The embodiment of the invention discloses an efficient utilization method of copper-iron sulfide ore. The method comprises the following steps: S1, mixing the copper-iron sulfide ore with magnesium oxide to obtain a mixed material; s2, heating the mixed material to a set temperature in an air or oxygen atmosphere for roasting, and collecting sulfur dioxide gas in tail gas by using a magnesium hydroxide solution to obtain magnesium sulfate; collecting a roasted solid-phase product; s3, washing the roasted solid-phase product with water to obtain a copper-iron oxide intermediate product; and S4, the copper-iron oxide intermediate product is reduced in the hydrogen atmosphere, and a copper and iron elementary substance mixture or a copper-iron alloy is obtained. The process flow is simplified, the energy consumption is low, the controllability of hydrogen reduction and the synergistic extraction of copper and iron resources are realized, the emission of a large amount of sulfur dioxide in the traditional pyrogenic process is avoided, and the method has remarkable environmental protection and economic benefits.

The present invention relates to a high-efficiency flotation separation method for complex copper-iron sulfide ore, and belongs to the technical field of flotation reagents. A combined collector is prepared, wherein the components of the combined collector are composed of 75-80 parts of aminotrimethylenephosphonic acid, 10-15 parts of xanthate, 5-10 parts of ethylthiocarbamate, and 0.5-1 part of polyol fatty acid ester, and the mass concentration of the combined collector is 30-50%; pulping, adding 200-800g / t of sulfiding agent to the complex copper-iron sulfide ore, grinding the ore to a fineness of -0.074mm accounting for 65-90%, and then pulping to a slurry with a solid concentration of 25-40wt%; flotation, subjecting the slurry with a solid concentration of 25-40wt% to a flotation operation of one coarse, three-four fine, and two-three sweeps to obtain copper concentrate and sulfur tailings, wherein the combined collector is used in the flotation process of the one coarse, three-four fine, and two-three sweeps. The present invention develops a new type of combined collector as a flotation agent for efficiently separating chalcopyrite and pyrite minerals, thereby achieving excellent flotation separation effect of complex copper-iron sulfide minerals in a slurry under low-alkali conditions.

This disclosure relates to an arsenic fixation composition and its application method in a coal washing process. The arsenic fixation composition exhibits a good synergistic effect among dolomite powder, auxiliary absorbent, and catalyst, enabling the adsorption of arsenic from the coal washing process products after conversion. This reduces the arsenic content in the coal washing process products and improves arsenic removal efficiency. Using inexpensive, low-cost, and widely available dolomite powder as the main adsorbent reduces environmental pollution problems associated with traditional coal washing processes and improves their environmental performance. The use of a composition of petroleum sulfide and Fe-Mn composite oxides as the auxiliary absorbent allows for several advantages. First, the sulfur in petroleum sulfide converts trivalent arsenic in coal into pentavalent arsenic, facilitating absorption by the absorbent. Second, the Fe and Mn in the Fe-Mn composite oxides react with sulfur to form iron sulfide and manganese sulfide, preventing sulfur from entering the washing water and causing environmental pollution.

Disclosed herein are methods for controlling iron sulfide associated with a wellbore, downhole formation, reservoir or well, or infrastructure or equipment used in the extraction, production, processing, transportation, storage or disposal of a fluid, such as in pipelines and other infrastructure or equipment used in the oil and gas industries, as well as many other industries.

The invention discloses an iron sulfide nano-enzyme gel as well as a preparation method and application thereof, and belongs to the field of pharmaceutical preparations, and the iron sulfide nano-enzyme gel comprises the following components in percentage by mass: 5-6% of sodium alginate, 0.005-0.1% of anhydrous sodium sulfite, 2-5% of glycerol, 0.1-0.2% of iron sulfide nano-enzyme and the balance of purified water. The iron sulfide nano-enzyme gel prepared by the invention has the advantages of simple prescription and preparation process, low cost and the like, and has relatively high industrial application value. Components in the iron sulfide nano-enzyme gel are uniformly distributed and are not layered, and the iron sulfide nano-enzyme gel has slow-release and controlled-release effects on drug release and is easy to coat and use.

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses a preparation method and application of a copper-iron sulfide / nitrogen-doped porous carbon composite material, which comprises the following steps: (1) mixing copper salt, potassium ferricyanide, a nitrogen source and polyethylene glycol, and obtaining a copper-iron Prussian blue precursor after ball milling; (2) pyrolyzing the copper-iron Prussian blue precursor under an inert atmosphere, washing and removing impurities, and drying to obtain an intermediate product; and (3) heat-treating the intermediate product and a sulfur source under an inert atmosphere to obtain a copper-iron sulfide / nitrogen-doped porous carbon composite material. Through the synergistic effect of the double-metal sulfide and the nitrogen-doped porous carbon composite, sodium ions with a larger ion radius can be more easily embedded and de-embedded in the interlayer spacing, meanwhile, abundant active sites are provided to enhance ion storage, so that the sodium ion battery has outstanding rate performance and stable cycle performance.

The application discloses a method for treating antibiotic wastewater by using a graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate, and the method is characterized by using the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst to activate persulfate for degrading and treating antibiotic wastewater, wherein the graphdiyne / ferrous indium sulfide nanocomposite comprises ferrous indium sulfide nanoparticles, and the nanoparticles are loaded with graphdiyne nanosheets. The method for treating antibiotic wastewater by using the graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate uses the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst, wherein the nanocomposite has many reactive sites, high catalytic activity and good stability, can efficiently activate persulfate with a smaller amount of catalyst, can efficiently remove antibiotics in wastewater, and has the advantages of low cost, high treatment efficiency, good removal effect, green environmental protection and the like, and therefore, the method has important significance for effectively purifying antibiotic wastewater, has high use value and good application prospect.

This application provides an iron-based thin-film probe, an in-situ analysis method for soil micro-interface pollutants, a screening method for iron-based materials for soil remediation, and a soil remediation method, belonging to the field of environmental analysis and testing technology. The iron-based thin-film probe, used to study the role of iron-containing mineral micro-interface pollutants in soil, is prepared from an iron sheet through in-situ surface modification; wherein the modified surface formed by the in-situ surface modification is selected from any one of nano-zero-valent iron, iron oxide, and iron sulfide; the iron-based thin-film probe is used to simulate the adsorption, distribution, and redox reactions of iron-containing mineral micro-interface pollutants in soil.

The present invention discloses an ultrasound / magnetic resonance dual-mode nanoprobe and its preparation method and application. The preparation method comprises the following steps: S1, preparing iron sulfide nanosheets (FeS) using ammonium ferrous sulfate, trisodium citrate, etc. as raw materials, and resuspending the FeS in ethanol to obtain an FeS ethanol solution; S2, adding perfluorohexane to the FeS anhydrous ethanol solution, and using an ultrasonic crusher under an ice bath to prepare a FeS / PFH suspension; S3, mixing the FeS / PFH suspension with a 1 mg / mL dopamine hydrochloride anhydrous ethanol solution, stirring at room temperature in the dark, and washing with pure water to obtain the final product, FeS / PFH / PDA nanomaterial. The present invention discloses an ultrasound / magnetic resonance dual-mode nanoprobe and its preparation method and application. The synthesis method for preparing the ultrasound / magnetic resonance dual-mode nanoprobe is simple and highly operable; the synthesized product is stable and reproducible, which is beneficial for biomedical research and clinical disease diagnosis.

The application provides a preparation method of a sodium ferrous disulfide catalyst and application of the sodium ferrous disulfide catalyst in direct coal liquefaction, and relates to the technical field of coal liquefaction.The preparation method of the sodium ferrous disulfide catalyst comprises the following steps: mixing a ferric salt solution and a Na2S solution or a NaHS solution, performing a precipitation reaction, and obtaining a precipitation reaction system; and aging the precipitation reaction system, and performing solid-liquid separation to obtain the sodium ferrous disulfide catalyst.The preparation method of the NaFeS2 catalyst is simple in process, mild in preparation condition, does not need heating and pressurization, has a wide source of raw materials, is low in cost, and is easy to be industrialized.The obtained sodium ferrous disulfide has high catalytic activity as a catalyst for direct coal liquefaction, and the oil yield and conversion rate of direct coal liquefaction are higher than those of a catalyst used in the industry at present.

The present invention relates to the field of sewage treatment technology, and discloses a composite material composition for groundwater remediation, a composite material, a preparation method thereof, and an application thereof. The composite material comprises nanometer zero-valent iron sulfide, ruthenium chloride-modified biochar, attapulgite, a persulfate, and a binder; the mass ratio of the nanometer zero-valent iron sulfide, the ruthenium chloride-modified biochar, the attapulgite, the persulfate, and the binder is 1:2-6:0.5-1.5:1-3:16-40. The composite material provided by the present invention is resistant to clogging and scaling, has high permeability, and has a high removal rate of target pollutants in groundwater. It can be used as a filler in permeable reactive grids (PRBs) for treating contaminated groundwater.

The invention relates to the field of water and soil pollution treatment, in particular to a method for reinforcing and fixing hexavalent chromium pollutants based on iron oxide in-situ vulcanization coupling organic matter, which comprises the following steps: step 1, injecting a vulcanizing agent into a hexavalent chromium polluted area, so that in-situ iron oxide minerals are subjected to vulcanization modification to generate modified minerals; 2, a natural organic acid solution is injected and reacts with the modified minerals, the fixing efficiency on hexavalent chromium is enhanced, and an iron sulfide oxide mineral-organic composite repairing material is generated in situ; and 3, the iron sulfide oxide mineral-organic composite repairing material reacts with hexavalent chromium, trivalent chromium precipitates are generated, and long-acting fixation of hexavalent chromium is achieved. The remediation efficiency and the application range of hexavalent chromium are remarkably improved, meanwhile, the method has the advantages of being simple and convenient in process, low in cost, environmentally friendly and the like, the method is particularly suitable for large-scale site remediation and practical engineering application, and a reliable technical means is provided for soil and underground water chromium pollution treatment.

This invention patent application addresses a system for the detection and quantification of mineralogical species via x-ray diffraction (XRD) of the concentrate of dry copper before it is injected into a converter or melting furnace. Specifically, it addresses a device that performs a mineralogical analysis, in line and in real time, of the concentrate of copper in the bath smelting furnace via x-ray diffraction (XRD), which allows for control over the ideal mixture for the optimal process for copper sulfide (Cu2S)-white metal, iron sulfide (FeS)-Slag and pyritic sulfur (S2)-temperature.

The invention provides a regeneration method of an invalid porous silicate supported micro-nano iron sulfide copper alloy, a regenerated material and application of the regenerated material, and relates to the technical field of catalyst activity recovery. According to the regeneration method, the ineffective porous silicate supported micro-nano iron sulfide copper alloy, the copper slag and the iron mud are taken as raw materials, a small amount of carbonaceous reducing agent is supplemented, and a passivation layer on the surface of the ineffective material is effectively stripped and regenerated under the roasting condition, so that the composition characteristics of various hazardous wastes can be fully utilized in the process to realize regeneration of the ineffective material; and innocent treatment of various hazardous wastes can be realized. The recovery method provided by the invention not only solves the problems in the prior art, but also has the advantages of low cost, reasonable process, high resource recovery efficiency and the like, and provides a scheme with important application value for the field of industrial wastewater treatment.

The application discloses a kind of iron wurtzite and sulphide iron ore mineral asynchronous flotation separation method, belong to nonferrous metal sulphide mineral flotation technical field;The application promotes the flotation of iron wurtzite by slurry aeration, realizes the asynchronous flotation of iron wurtzite, pyrite and pyrrhotite by means of high selectivity collector CTB-2 and oxidant calcium hypochlorite, solves the problem of difficult separation of iron wurtzite and pyrrhotite, and uses high concentration copper sulfate as depressor to rapidly improve the grade of zinc concentrate, uses ferrous sulfate to realize the sulfur-free flotation of sulfur concentrate, and finally obtains high-quality zinc concentrate, first sulfur concentrate (pyrite) and second sulfur concentrate (pyrrhotite) products.The application optimizes and simplifies the beneficiation process, cancels the magnetic separation step in the traditional process, and realizes efficient separation of zinc and sulfur through single flotation method.

The invention relates to the technical field of land pollution treatment, solves the problem that in the prior art, when a large-area medium polluted by hexavalent chromium is treated, the addition amount of ferrous sulfide is prone to being inaccurate, and consequently the remediation effect is not ideal, and provides ferrous sulfide particles with shells and a preparation method and application of the ferrous sulfide particles. The prepared ferrous sulfide particles with the shells can keep efficient removal of chromium within the pH value range of 5-9, the problem that the adsorption behavior of a traditional model in a low-chromium-concentration area is difficult to predict is effectively solved by means of a correction adsorption model with higher fitting precision, and therefore the actual demand quantity of target repairing liquid can be accurately predicted, and the application prospect is wide. The target repairing liquid can be injected more accurately, and excessive or insufficient injection is avoided. After hexavalent chromium is reduced into trivalent chromium by ferrous sulfide, the trivalent chromium and carboxymethyl cellulose can form a stable chelate, and zero-valent sulfur can also form a compact passivation layer on the surface of a polluted medium, so that the trivalent chromium is prevented from being reoxidized, and long-term stable repair of hexavalent chromium is realized.

The application discloses a kind of composite photothermal film, the composite photothermal film is with hydrophilic filter membrane as carrier, carbon / iron sulfide is loaded on carrier;Wherein, the side of hydrophilic filter membrane loaded with carbon / iron sulfide is grafted with hydrophobic group.The application also discloses the preparation method of the above-mentioned composite photothermal film, comprising the following steps: (1) heat treatment is carried out to coal slime, and coal slime is carbonized;(2) carbonized coal slime is mixed with pyrite, after mixing, high-temperature calcination is carried out under inert atmosphere, and carbon / iron sulfide powder is obtained;(3) carbon / iron sulfide powder is dispersed in solvent, after ultrasonic treatment, it is loaded on hydrophilic filter membrane by vacuum filtration;(4) polyethylene glycol solution containing hydrophobic agent is used to carry out one side hydrophobic modification to the hydrophilic filter membrane obtained in step (3) by vacuum filtration, and the composite photothermal film with Janus structure of surface layer hydrophobic, lower layer hydrophilic is obtained;Wherein, the side loaded with carbon / iron sulfide is hydrophobic side.The application finally discloses a high-salinity wastewater treatment device containing the above-mentioned composite photothermal film.

This application relates to the fields of petroleum processing catalysts and solid waste resource utilization technology, specifically disclosing an iron sulfide catalyst for heavy oil hydrocracking and its application. The active component of this iron sulfide catalyst for heavy oil hydrocracking includes non-stoichiometric iron sulfide Fe obtained from coal combustion dust through magnetic separation. 1‑x S, where x ≤ 0.2. The iron sulfide catalyst Fe for heavy oil hydrocracking of this application. 1‑x S has a unique hexagonal crystal structure and surface properties. When used as a catalyst for heavy oil hydrocracking, it has significantly better catalytic efficiency than traditional hydrocracking catalysts, lower cost, longer service life, and stronger resistance to carbon buildup.

The embodiment of the invention provides a heat conduction material and a preparation method and application thereof, the heat conduction material comprises a crystal phase, the crystal phase comprises a main body phase and a doping phase, the main body phase is hexagonal phase ferronickel sulfide, the doping phase comprises cubic phase ferronickel sulfide, and the heat conductivity of the heat conduction material changes along with temperature change. The heat conductivity of the heat conduction material can change along with the environment temperature, and the heat conduction material can replace a TEC device to carry out temperature control on an optical device in a passive state so as to realize low-cost and low-power-consumption temperature control.

The invention belongs to the technical field of electro-catalytic materials, and relates to a preparation method and application of a CoFe-PBA chalcogenized carbon cloth composite material, in particular to a CoFe-PBA loaded carbon cloth Prussian blue (CoFe-PBA) precursor based on electrochemical activation. The invention discloses a method for preparing a cobalt sulfide / iron sulfide heterostructure material through sulfuration treatment and integrated application of the cobalt sulfide / iron sulfide heterostructure material in the field of hydrogen production through water electrolysis. Carbon cloth is activated through electrochemical pre-oxidation to enhance the surface activity, and after CoFe-PBA grows in situ, a uniformly dispersed CoS2 / FeS2 heterostructure is generated through calcination in a sulfur powder atmosphere. The material has high conductivity, abundant active sites and strong interface coupling effect, and shows excellent hydrogen evolution and oxygen evolution performance.

The invention discloses a pyrite-based composite positive electrode material, a preparation method thereof and an application of the pyrite-based composite positive electrode material in an all-solid-state battery, the preparation method of the pyrite-based composite positive electrode material comprises the following steps: (1) carrying out oscillation ball milling treatment on pyrite square crystals to obtain iron sulfide fine powder; (2) mixing lithium sulfide and lithium iodide, and then carrying out high-energy ball milling treatment to obtain a lithium-iodine-sulfur amorphous mixture; and (3) mixing the iron sulfide fine powder and the lithium-iodine-sulfur amorphous mixture, and then carrying out high-energy ball milling treatment to obtain the pyrite-based composite positive electrode material. The pyrite-based composite positive electrode material is combined with a solid electrolyte membrane and a lithium-indium negative electrode, so that a high-capacity and low-attenuation pyrite composite positive electrode sulfide all-solid-state battery can be prepared, and high specific capacity and long circulation performance are shown.

The invention relates to a method for detecting effective heavy metal elements in soil, which comprises the following steps: (1) mixing and extracting a soil sample and a soil extracting agent to obtain an extracting solution; mixing the extracting solution and an oxidizing agent, and performing photolysis to obtain a to-be-detected sample; (2) mixing the iron sulfide nano-material modified paper base with the sample to be detected in the step (1), enriching and precipitating the available heavy metal elements, then detecting the enriched and precipitated iron sulfide nano-material modified paper base by adopting a laser-induced breakdown spectroscopy technology, and determining the content of the available heavy metal elements on the basis of a calibration curve of the available heavy metal elements. The content of the effective heavy metal elements in the soil is obtained. According to the method, the iron sulfide nano material modified paper base is used for enrichment and precipitation of the effective heavy metal elements in the soil leaching solution subjected to ultraviolet photolysis, then the LIBS technology is adopted for detection, and high-sensitivity and high-accuracy rapid detection of the effective heavy metal elements Cu, Cd and the like in the soil is achieved.