50 results about "Cadmium ion" patented technology

The invention discloses a fluorescent / colorimetric dual-mode paper-based sensor for detecting cadmium ions in rhizoma polygonati as well as a preparation method and application of the fluorescent / colorimetric dual-mode paper-based sensor, and belongs to the technical field of detection of heavy metal residues in food with homology of medicine and food. PEI-UCNPs and PtNPs are loaded on a paper base and are mixed and reacted with Apt-AMNPs (at) TMB, H2O2, a PBS buffer solution and a solution containing Cd < 2 + >. The Aptamer specifically recognizes and captures Cd < 2 + >, so that the Apt-AMNPs (at) TMB is dissociated, and the TMB is released from holes of the AMNPs; the PtNPs on the paper base catalyzes colorless TMB (Tetramethylbenzidine) to generate blue oxide (oxTMB) under the action of H2O2, and the oxTMB can quench up-conversion fluorescence of PEI-UCNPs through fluorescence inner filtration. When the fluorescence / colorimetric dual-mode paper-based sensor is used for detecting the content of cadmium ions in rhizoma polygonati, the fluorescence / colorimetric dual-mode paper-based sensor has the characteristics of simplicity and convenience in operation, low detection cost, rapidness, specificity, sensitivity, portability and the like, and the fluorescence / colorimetric dual-mode paper-based sensor can be applied to on-site detection of the cadmium ions in rhizoma polygonati.

A kind of water environment cadmium ion and temperature double parameter optical fiber chemical sensing system relates to water body environment detection field.In the above system, spontaneous emission light source is near infrared light source;The surface of optical fiber sensing unit is coated with magnetic MOF-cadmium ion imprinted polymer;The light signal generated by spontaneous emission light source enters optical fiber sensing unit, optical spectrometer collects the transmission spectrum signal of optical fiber sensing unit, and the collected spectrum data are output to photoelectric detection module;Photoelectric detection module converts light signal into electrical signal and transmits to demodulation module;Demodulation module gives the cadmium ion concentration and temperature according to input signal using machine learning algorithm.The present application has higher specific recognition ability to cadmium ion, and can effectively separate the coupling influence of cadmium ion concentration and temperature on sensing signal.

A ZIF-derived zinc-cadmium sulfide photocatalyst, its preparation method, and its application are disclosed. The catalyst, by molar fraction, comprises: 35-50% 2-methylimidazole; 0-7.7% divalent cadmium ion compound; 0-7.7% divalent zinc ion compound; 7-10% thioacetamide; and 35-50% amines. The preparation method involves: preparing a 2-methylimidazole solution and a cadmium-zinc mixed solution separately; then preparing a ZIF precursor solution with cadmium and zinc as the central metals; adding thioacetamide to the precursor solution; transferring the solution to a polytetrafluoroethylene liner and hydrothermally treating it; finally collecting the hydrothermally treated solution, centrifuging, washing, drying, and grinding to obtain the ZIF-derived zinc-cadmium sulfide photocatalyst. The catalyst prepared by this invention has a large specific surface area and exhibits significant catalytic effects in photocatalytic water splitting for hydrogen production. Furthermore, the catalyst has a stable structure and can be recycled for a long period without a significant decrease in the hydrogen production rate.

The application discloses a high-strength steel unqualified zinc-cadmium alloy plating layer stripping method, and its stripping process is as follows: 80-150 g / L of sodium nitrite, 50-100 g / L of ammonium bicarbonate, 50-100 g / L of ammonium chloride, the pH of the stripping solution is 6-8, and normal temperature operation is adopted. The sodium nitrite is used as an oxidizing agent and a steel base inhibitor for the zinc-cadmium alloy plating layer, the ammonium bicarbonate is used as a complexing agent for zinc ions and cadmium ions and a pH buffer for the plating solution, and the ammonium chloride is used as a complexing agent for zinc ions and cadmium ions and a promoter for dissolving the zinc-cadmium alloy plating layer. When the pH of the stripping solution is too high, dilute nitric acid is used to reduce the pH, and when the pH is too low, sodium carbonate solution is used to increase the pH. The technical scheme of the application is used to replace the chromium acid stripping method, and the high pollution problem caused by the use of the chromium acid is overcome.

The invention provides an algae source soil conditioner for synergistically passivating copper and cadmium as well as a preparation method and application of the algae source soil conditioner, and belongs to the technical field of soil remediation. The algae source soil conditioner comprises an algae source active component and a biochar-based carrier. By combining activity retention of the seaweed extract and functional modification of pyrolytic carbon, the content of copper ions and cadmium ions in soil can be remarkably reduced, meanwhile, the activity of soil urease, sucrase and dehydrogenase is promoted to be remarkably improved, and the synergistic effect of heavy metal passivation and soil ecological function restoration is achieved; the preparation method disclosed by the invention is simple and easy to operate, and the prepared algae source soil conditioner has a multi-stage pore structure and rich surface functional groups.

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

The invention discloses an electroplating disqualified cadmium layer stripping solution, a preparation method and a use method, and the electroplating disqualified cadmium layer stripping solution comprises 6-8 parts of sodium phytate, 1-3 parts of sodium nitrilotriacetate, 2-4 parts of borate, 5-10 parts of sodium bromate, 1-2 parts of sodium alkyl naphthalene sulfonate, 1-2 parts of glucoside, 5-8 parts of sodium nitrate, 3-5 parts of ammonia water, 2-4 parts of triol ethylamine, 4-6 parts of 1-hydroxyethylidene-1, 1-diphosphonic acid and 8-12 parts of ammonium persulfate. The total amount of the purified water is 100 parts, and the total amount of the purified water is 100 parts. The pH value of the deplating agent solution is alkaline, the problem of hydrogen evolution of a hydrogen sensitive material is solved, the risk of hydrogen embrittlement is avoided, and hydrogen removal is not needed after steel and iron materials are deplated; cadmium ion heavy metal pollution and sewage treatment difficulty exist, the stripped cadmium ions automatically generate precipitates, recycling is facilitated, and the sewage treatment difficulty is reduced; the metal deplating liquid is convenient to use and simple to operate, only unqualified products need to be put into the deplating liquid in a room-temperature environment, after a certain time, after a plating layer is completely removed, the unqualified products are washed with water, and a metal base material is not damaged.

The invention discloses application of an NtbHLH128 transcription factor in improving heavy metal cadmium resistance of plants, and belongs to the technical field of gene engineering. According to the invention, an NtbHLH128 gene knockout mutant plant is constructed through a gene editing technology, and the knockout mutant plant can maintain normal growth in a heavy metal cadmium polluted environment and shows remarkable cadmium stress resistance; meanwhile, the knockout mutant plant also has high enrichment capacity, cadmium ions in the environment can be enriched, and the heavy metal concentration in the environment is reduced. The regulation effect of the NtbHLH128 gene in heavy metal stress is defined, an important target gene is provided for cultivating new varieties of crops which are highly resistant to heavy metal stress and used for contaminated soil remediation, a theoretical basis is laid for ecological remediation work, and the NtbHLH128 gene has important application value.

The invention belongs to the technical field of photocatalysts, and particularly relates to a twin-crystal zinc cadmium sulfide nanosheet, a composite photocatalyst and a preparation method and application thereof.The preparation method of the twin-crystal zinc cadmium sulfide nanosheet comprises the following steps that a zinc source, a diethylenetriamine aqueous solution and a sulfur source are mixed, a first solvothermal reaction is conducted, and a second solvothermal reaction is conducted; a zinc sulfide-diethylenetriamine composite precursor is obtained; mixing the zinc sulfide-diethylenetriamine composite precursor, a cadmium source and an organic solvent, and performing a second solvothermal reaction to replace part of zinc ions in crystal lattices of the zinc sulfide-diethylenetriamine composite precursor with cadmium ions to obtain a zinc cadmium sulfide-diethylenetriamine composite precursor; and dispersing the zinc cadmium sulfide-diethylenetriamine composite precursor in water, and carrying out hydrothermal reaction to remove diethylenetriamine molecules, thereby obtaining the twin crystal zinc cadmium sulfide nanosheet. The twin crystal interface can provide a preferential carrier migration channel, so that photo-induced electron-hole separation is further promoted, and the photocatalytic hydrogen production performance is improved.

The invention discloses a cadmium telluride thin film battery cadmium chloride spraying monitoring and control system and method. The system comprises a material preparation module used for preparing and storing a cadmium chloride solution containing a cadmium ion fluorescent probe; the spraying module is used for uniformly spraying the solution containing the probe to the surface of the cadmium telluride substrate to form a liquid film; the on-line detection module is used for collecting a liquid film fluorescence image through an optical detection unit and measuring the conductivity of the liquid film in a non-contact manner through a conductivity detection unit; and the data processing and control module is used for carrying out fusion analysis on the fluorescence image and the conductivity data, calculating the coverage rate, the uniformity and the cadmium chloride content of the liquid film in real time, and dynamically adjusting spraying parameters and probe injection parameters according to an analysis result, so as to realize closed-loop accurate control of the coating process. The problems that in the prior art, real-time performance is poor, blind areas exist in microcosmic distribution detection, and control precision is insufficient are effectively solved, and the consistency of the coating technology and the material utilization rate are improved.

This scheme discloses a method for adsorbing cadmium ions in the field of heavy metal adsorption technology, specifically: using acylhydrazone-sodium alginate-Ca 2+ Composite adsorbent for heavy metal Cd 2+ Adsorption occurs, wherein the acylhydrazone-sodium alginate-Ca 2+ The composite adsorbent is prepared by reacting salicylhydrazine with sodium hydroxide after alkalization and oxidation with sodium periodate to form a salicylhydrazone compound, which is then cross-linked with sodium alginate. The method described in this application can simultaneously reduce the amount of distiller's grains and the heavy metal Cd. 2+ Pollution.

The invention relates to the technical field of adsorbents, and discloses a preparation method of a cadmium ion selective adsorbent. The invention relates to a water-based metal corrosion inhibitor which comprises the following components in parts by weight: 2-3 parts of amino undecanoic acid, 2-3 parts of citric acid, 0.45-0.6 part of NaOH, 4-6 parts of cellulose, 4-6 parts of thiourea, 4-6 parts of nano silicon dioxide, 450-650 parts of an MES buffer solution, 500 parts of a PBS buffer solution, 8-12 parts of a coupling agent, 8-12 parts of a cross-linking agent, 0.4-0.6 part of metallothionein and 20-30 parts of water. Metallothionein is bonded with carboxyl on the surfaces of the carbon dots through an amide reaction and is bonded with modified cellulose through a large number of hydrogen bonds, the bonding capacity of the metallothionein and the modified cellulose is greatly enhanced, and the stability of the adsorbent is improved. The adsorbent prepared by the invention has excellent selective adsorption to cadmium, has excellent tolerance to some common coexisting interfering ions in a water body, and has excellent industrial application prospects.

The invention relates to a sulfydryl silicon dioxide coated magnetic biochar material, a preparation method thereof and an application of the sulfydryl silicon dioxide coated magnetic biochar material in adsorbing and removing cadmium ions, the material takes biochar prepared from aquaculture byproducts as a substrate, and Fe3O4 magnetic particles, a silicon dioxide coating layer and a sulfydryl functional group are loaded in sequence. The method comprises the following steps: firstly, synthesizing magnetic biochar containing SiO2-coated Fe3O4 particles on the surface by a coprecipitation method under an alkaline condition, and then carrying out sulfydryl modification on the magnetic biochar by a grafting method to finally prepare the sulfydryl-modified silicon dioxide-coated magnetic biochar adsorbent. The adsorbent prepared by the method has the characteristics of high specific surface area, abundant pore structures, a large number of sulfydryl active groups and the like, shows high adsorption capacity and good selectivity on cadmium ions in water, and can be conveniently separated and recycled through magnetism. The material can also be used for adsorbing lead, copper, zinc, chromium and other heavy metal ions, the preparation process is simple, and the material has wide application prospects in the field of heavy metal wastewater treatment.

The application discloses a method for improving the cadmium ion adsorption capacity of Escherichia coli, and belongs to the technical field of genetic engineering. E. coli BL21 to Cd 2+ , and the unit point mutation of T16C, K19C and S45C to CeMT2 can significantly improve the Cd 2+ binding capacity of CeMT2, and the cell Cd 2+ concentration of the T16C, K19C and S45C mutants is increased by 1.32 times, 1.50 times and 1.41 times, respectively. E. coli The recombinant expression of CeMT2 (K19C) and LmCadC in BL21 can obviously improve the cadmium ion adsorption capacity of Escherichia coli, and the maximum adsorption capacity reaches 8.5 mg / g.

The invention discloses heavy metal developing test paper based on a carbon quantum dot composite material as well as a preparation method and application thereof, and belongs to the technical field of heavy metal detection. The heavy metal chromogenic test paper comprises a quantitative filter paper substrate, a composite indicator and a colloid protection layer, wherein the composite indicator is prepared from a silk fibroin-anthocyanin compound, fluorescent carbon-based quantum dots and rich-pore carbon nitride, and is loaded on the substrate through mesoporous silicon balls; and the colloid protection layer is a mixed colloid solution of a masking agent and a sensitizer. The preparation method comprises the following steps: independently preparing the components, constructing the composite indicator, loading the meso-porous silicon balls and coating the protective layer. According to the invention, on-site rapid semi-quantitative detection of cadmium ions and ferric ions in soil or water can be realized, the operation is simple and convenient, the cost is low, and on-site screening requirements are met.

The invention relates to the technical field of food microorganisms, in particular to a Saccharomyces cerevisiae BR24 (saccharomyces cerevisiae BR24) and application of the Saccharomyces cerevisiae BR24. The Saccharomyces cerevisiae BR24 is preserved in the China General Microbiological Culture Collection Center on December 23, 2024, and the preservation number of the Saccharomyces cerevisiae BR24 is CGMCC (China General Microbiological Culture Collection Center) NO.33166. The Saccharomyces cerevisiae BR24 is named as Saccharomyces cerevisiae BR24. The Saccharomyces cerevisiae BR24 provided by the invention shows good tolerance in a cadmium exposure environment, and by combining with cadmium ions, the level of serum transaminase is reduced, and the expression of metallothionein is promoted, so that the protection and recovery of liver functions are realized.

This invention belongs to the technical field of metal ion adsorption materials, specifically a method for preparing an adsorbent and a method for determining the soluble zinc content of raw materials used in the ammonia chloride process for producing electrolytic zinc. This invention modifies the surface of manganese dioxide with a thiourea-based silane coupling agent, grafting a silane coupling agent containing a thiourea structure onto the surface of manganese dioxide. The adsorption of lead, copper, and cadmium ions in solution is achieved using the manganese dioxide matrix and the thiourea-based silane coupling agent on the matrix surface, while effectively preventing the adsorbent from adsorbing zinc ions from the solution. When the adsorbent prepared by this invention is used to determine the soluble zinc content of raw materials used in the ammonia chloride process for producing electrolytic zinc, it exhibits a small testing error and can effectively improve the accuracy of soluble zinc content determination.

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

The invention discloses a cadmium removal method for ammonium sulfate-containing sewage, and relates to the technical field of sewage treatment. The method comprises the following steps: adding a composite cadmium removal agent containing porous chitosan and cysteine into pretreated ammonium sulfate-containing sewage, and adjusting process parameters to obtain complexed ammonium sulfate-containing sewage; and adding sulfate into the complexed ammonium sulfate-containing sewage, controlling the process parameters again to hydrolyze the metal ions in the sulfate, carrying out co-precipitation on the metal ions and complexed cadmium ions, standing, carrying out centrifugal separation to obtain precipitates, and remaining supernate, thereby obtaining the cadmium-removed ammonium sulfate-containing sewage. The cadmium removal method for the ammonium sulfate-containing sewage provided by the invention is simple, efficient, high in adaptability, green and environment-friendly.

This invention describes a method for preparing nano-grass diamond / non-diamond carbon composite structures by etching away the non-diamond carbon portion through high-temperature annealing in air, thus forming nano-grass diamond. This belongs to the technical field of functional nanostructures and their preparation. Nitrogen is crucial in the preparation of boron-nitrogen co-doped diamond / non-diamond composite films. Nitrogen doping leads to columnar diamond growth, and the high methane concentration and nitrogen addition intensify secondary diamond nucleation, resulting in very small diamond grains containing a large amount of non-diamond carbon—precisely the desired outcome. Removing the non-diamond carbon significantly increases the surface area of ​​the electrode in this diamond sensor's high-density nanograss structure, providing more reaction sites for detecting trace molecules. Taking cadmium ions as an example, in the range of 1–100 μg / L… ‑1 It exhibits good linearity in solutions, achieving a concentration of 0.28 μg / L. ‑1 The nanograss diamond sensor exhibits a low detection limit. It demonstrates good stability and reusability, and its fabrication method is simple and suitable for large-scale production.

The invention discloses a cadmium ion fluorescent probe as well as a synthesis method and application thereof, and belongs to the technical field of environmental analysis and biological analysis and detection. The structural formula is shown in the specification. The synthesis method comprises the following specific synthesis steps: by taking absolute ethyl alcohol as a solvent, adding 4-chloro-3-formyl coumarin, stirring at room temperature, then adding 2-(2-aminophenyl) benzimidazole, carrying out heating reflux reaction, cooling to room temperature, purifying an obtained crude product by using silica gel column chromatography, and separating by using ethyl acetate and petroleum ether as eluents, thereby obtaining the 4-chloro-3-formyl coumarin. The invention provides a simple and convenient cadmium ion fluorescent probe which can be synthesized and has specific response, and in cadmium ion detection, the cadmium ion fluorescent probe has the advantages of rapid detection, low detection limit value, good selectivity and strong anti-interference capability.

The application discloses a kind of bisphenol A thio phosphine hydrazine class silver, zinc and cadmium ion fluorescent probe, specifically utilize bisphenol A and hexamethylenetetramine under acidic conditions Duff aldehyde group reaction obtains bisphenol A dialdehyde compound, simultaneously utilize diphenyl phosphine chloride and sublimation sulfur carry out sulfuration reaction and obtain intermediate 1, again 1 and hydrazine hydrate carry out substitution reaction and obtain intermediate 2, intermediate 2 and bisphenol A dialdehyde compound carry out amine aldehyde condensation reaction and prepare probe DPSN.The fluorescent probe of the application responds quickly and has high specificity recognition chemical fluorescence sensor, can be used for the detection of trace Ag + 、Zn 2+ And Cd 2+ In environment, with good practical application and popularization value, and preparation raw material is easy to obtain, synthesis is simple, and yield is high.

The invention relates to the technical field of electrochemical sensing, and discloses a Bi2Se3 / Ti3C2Tx sweat heavy metal electrochemical sensor and a preparation method thereof, and the preparation method comprises the following steps: preparing a Bi2Se3 / Ti3C2Tx composite material from a Ti3C2Tx nanosheet and a Bi2Se3 nanoflower material through an electrostatic self-assembly method, and modifying the Bi2Se3 / Ti3C2Tx composite material on the surface of a working electrode platform by adopting a micro dispensing method to prepare the lead-cadmium ion electrochemical sensor. Connecting the lead-cadmium ion electrochemical sensor into a circuit, performing electrochemical quantitative determination by adopting differential pulse voltammetry, and calculating the contents of Pb < 2 + > and Cd < 2 + > in sweat according to a peak current value; a machine learning method is used, a hybrid model fusing a least square lifting algorithm and a northern eagle optimization algorithm is adopted, and key experimental parameters of the sensor for detecting Pb < 2 + > and Cd < 2 + > are optimized.

This invention proposes a copper-vanadium-sulfur-selenium (Cvanadium-sulfur-selenium) light-absorbing thin film, its preparation method, and its application. Addressing the problems of small grain size and insufficient density in existing Cvanadium-sulfur-selenium light-absorbing thin films, this invention utilizes optimized selenization conditions and metal cation doping techniques to prepare Cvanadium-sulfur-selenium light-absorbing thin films. Optimized selenization conditions result in Cvanadium-sulfur-selenium light-absorbing thin films with larger grain sizes and reduced surface porosity, significantly improving the film's quality. Doping with metal cations such as sodium, bismuth, and cadmium ions promotes grain growth, increasing grain size and / or reducing film porosity, which is beneficial for improving cell conversion efficiency. This method improves film quality, and applying the prepared Cvanadium-sulfur-selenium light-absorbing thin film to the light-absorbing layer of a solar cell enhances the photoelectric conversion efficiency of the Cvanadium-sulfur-selenium light-absorbing thin film solar cell.

The invention relates to the technical field of biology, in particular to bacillus subtilis CJS2025CdS and application thereof. The bacillus subtilis CJS2025CdS is classified and named as bacillus subtilis CJS2025CdS, and is preserved in the China Center for Type Culture Collection, the preservation address is Wuhan University, Wuhan, Hubei, China, the preservation date is July 23, 2025, and the preservation number is CCTCC NO: M 20251677. The bacillus subtilis CJS2025CdS is an engineering bacterium living body material, and has the functions of specific induction, adsorption and recovery of cadmium ions at the same time.

The invention provides a solid bubble composite material for adsorbing heavy metals as well as a preparation method and an application method thereof, belongs to the technical field of adsorption separation functional materials, and solves one of the technical problems of poor cycling stability, complex and low-efficiency recovery separation, short service life, weak selective adsorbability and low adsorption capacity of an existing organic adsorbent. The invention discloses a solid bubble composite material for adsorbing heavy metals. The heavy metals comprise cadmium ions, lead ions, mercury ions, copper ions and nickel ions. The composite material is solid bubbles loaded with a sulfydryl-containing adsorption layer on the outer surface, and the mass ratio of the solid bubbles to the sulfydryl-containing adsorption layer is 1: (0.12-1.2); and the density of the composite material is 0.12-0.95 g / cm < 3 In the recovery process, high-energy-consumption solid-liquid separation equipment is not needed, after adsorption, the wastewater can quickly float on the water surface for recovery, and the recovery cost is greatly reduced.

The application provides a novel magnetic core-shell type cadmium ion imprinted polymer and a preparation method and application thereof, and belongs to the technical field of polymer materials. The novel magnetic core-shell type cadmium ion imprinted polymer is prepared by using SiO2 coated nano Fe3O4 as a carrier, PBTCA as a ligand, and MBA as a crosslinking agent, and by using surface imprinting technology and chemical grafting, and the maximum adsorption capacity of the imprinted polymer to Cd 2+ can reach 29.82 mg / g, the adsorption process can reach a basic balance within 20 min, and the whole adsorption process conforms to a pseudo-second-order kinetics model and a Langmuir isothermal adsorption model. The adsorption of the imprinted polymer to Cd 2+ is a spontaneous, endothermic and entropy-increasing process, and in a mixed solution containing Cd 2+ , Ni 2+ , Co 2+ , Zn 2+ , the distribution coefficient of the imprinted polymer to Cd 2+ reaches 643.3 mL / g, which proves that the imprinted polymer has the ability of selectively adsorbing Cd 2+ ions.

The application discloses a method for detecting cadmium ions and lead ions in water by using a screen-printed electrode electrochemical sensor, and comprises the following steps: taking a screen-printed electrode with a ZIF-8 / MWCNT nanocomposite modified on the surface of a reaction end as a working electrode to construct a screen-printed electrode electrochemical sensor; detecting the peak current change of a cadmium / lead ion solution to be measured by using the screen-printed electrode electrochemical sensor; and calculating the concentration of cadmium ions and lead ions in the cadmium / lead ion solution to be measured by using a linear regression equation of the cadmium ion concentration, the lead ion concentration and the peak current change. The method has the advantages of simple operation, low cost, high detection efficiency, high detection accuracy and the like, can realize on-site detection of cadmium ions and lead ions in water, is convenient to operate, high in accuracy, strong in anti-interference ability to interference factors, and has very important significance for realizing efficient detection of heavy metal cadmium ions and lead ions in a water environment.

The invention discloses an amino-functionalized mesoporous silica-based molecular sieve adsorption material as well as a preparation method and application thereof. The amino-functionalized mesoporous silica-based molecular sieve adsorption material is prepared from copper tailings as a raw material through the steps of pretreatment, main reaction and aftertreatment. The mesoporous molecular sieve material is suitable for heavy metal pollutant treatment and functional building material development. The method is simple and convenient to prepare, low in cost and excellent in adsorption performance, lead and cadmium ions in water can be effectively removed, and the prepared building material is green, environmentally friendly and free of pollution.