20 results about "Heavy metal chelation" patented technology

The utility model relates to a kind of water body heavy metal pollution cyclic repair equipment, its structure is: three purification columns are positioned in the shell inner cavity circumference, heavy metal chelate particles are equipped in purification column;Water tank is connected at the lower end of shell, three water tanks of upper open are distributed in the circumference in water tank, the top of water tank corresponds with the position of purification column, the top of water tank is connected inlet pipe, extends water tank, pipe end portion has butterfly valve, the bottom of water tank is connected outlet pipe, extends water tank, pipe end portion has three-way valve;Positioning plate is connected at the upper end of shell, three water circulation pumps are peripherally arranged in positioning plate, the water inlet of water circulation pump upper end is communicated with the inner cavity of corresponding water tank by outlet pipe, the water outlet position of water circulation pump lower end corresponds with the upper end opening position of purification column. The repair equipment can repair heavy metal pollution water body by the purification column filled with adsorption material, and through water circulation system, improve water body repair efficiency, realize heavy metal recovery and the reuse of adsorption material.

The application discloses a special leaching agent for organic matter and heavy metal compound contaminated soil and a preparation method thereof, relates to the technical field of leaching agents for compound contaminated soil and preparation thereof, and the preparation steps are as follows: first, carboxyl-modified fulvic acid is prepared, a mineral source fulvic acid is taken to prepare a suspension, high-purity nitrogen is introduced to remove oxygen, and then ammonium persulfate initiator is added; after water bath heating, acrylic acid monomer is uniformly and slowly added for reaction; after the reaction is completed, the system pH is adjusted; after dialysis and impurity removal, freeze-drying is carried out to obtain modified fulvic acid with an acrylic acid grafting rate of 15% to 30%; and the modified fulvic acid is taken to prepare a phosphate buffer suspension. The application improves the number of active functional groups of fulvic acid through acrylic acid grafting modification, greatly enhances the heavy metal chelation and polycyclic aromatic hydrocarbon solubilization capacity, and covalently crosslinks functional bacteria on the fulvic acid carrier, so that the functional bacteria can be adapted to different acid-base values of contaminated sites and are suitable for soil remediation of various compound contaminated sites.

This invention discloses a treatment process for high-concentration sulfate wastewater, belonging to the field of wastewater purification technology. The invention first provides a multifunctional composite ion sieve, the raw materials of which include magnetic core microspheres, calcium aluminate precursor components, heavy metal chelating agents, scale inhibitors, antioxidants, antibacterial agents, host-guest recognition agents, polysaccharide compounds, polyacrylic acid compounds, crosslinking agents, and initiators. The ion sieve is prepared through steps including magnetic core preparation, calcium aluminate precursor functional layer deposition, small molecule modification layer loading, and pH-responsive outer shell coating. In use, the ion sieve is added to wastewater and stirred for adsorption. After adsorption saturation, solid-liquid separation is achieved through magnetic separation, and the material is regenerated and recycled sequentially using desorption and reconstruction solutions.

This application relates to the field of waste liquid recycling and treatment technology, specifically disclosing a DMF waste liquid recycling and treatment process. The DMF waste liquid recycling and treatment process includes the following steps: S1, adding a modified polyethyleneimine adsorbent to DMF waste liquid from the electronics industry, stirring and reacting, and then filtering to obtain a residue-free waste liquid; S2, adding a heavy metal chelating agent to the residue-free waste liquid, stirring and reacting to obtain a mixture containing precipitate; S3, centrifuging the mixture, then adding anhydrous calcium chloride, allowing it to stand, and then filtering to obtain a purified solution; the purified solution is sent to a vacuum distillation column for distillation, and the bottom fraction is collected to obtain regenerated DMF. The recycling and treatment process of this application can effectively remove heavy metal ions and organic resins from DMF waste liquid, thus facilitating the recycling and reuse of DMF.

The utility model discloses a wastewater heavy metal chelation precipitation reaction device concretely relates to wastewater treatment technical field, including the sedimentation tank and the silt discharge pipeline, the bottom of the right side of sedimentation tank installs the silt discharge pipeline, and the top inside of sedimentation tank is provided with pretreatment assembly. The utility model discloses be provided with pretreatment pipeline, and the wastewater enters the inside of pretreatment pipeline through sewage inlet pipe, and when staying in the inside of pretreatment pipeline, can add medicine through medicine inlet pipe and handle, after mixing, can start electric push rod, and the auxiliary ring cover slides along the pretreatment pipeline, and after the bottom groove of bottom side opens, can flow into the inside of sedimentation tank through the bottom groove and carry out the precipitation treatment, and the filter screen in the bottom groove can carry out the prefiltration treatment to sewage in this process, and handle the larger sundries in the sewage, realize the pretreatment function of the wastewater heavy metal chelation precipitation reaction device when using.

The present application belongs to the technical field of ecological remediation of heavy metals in bottom mud, and discloses a device for heavy metal precipitation and solidification test of river and lake bottom mud, which comprises a test tank body, a power supply, a pressing plate, a backwater tank body and an EKG drainage plate, the inner side of the test tank body is provided with a filter screen and a geotextile, the pressing plate and the backwater tank body are provided with EKG plate hole grooves, the EKG drainage plate comprises a cathode and an anode, the EKG drainage plate is provided with a liquid inlet, the test tank body is connected with a water outlet pump and a liquid storage tank, the water outlet pump is connected with a water outlet pipe, the liquid storage tank is communicated with a liquid guide pipe and a liquid inlet pump, and the liquid inlet pump is connected with a liquid inlet pipe; the present application realizes the precipitation and solidification of heavy metals in bottom mud and the continuous drainage of bottom mud by electro-osmosis combined with pre-pressing and heavy metal chelating agents, shortens the precipitation period of heavy metal pollutants and the solidification period of bottom mud, and realizes the efficient precipitation and solidification of heavy metal pollutants in river and lake bottom mud.

The utility model discloses a multi-layer animal pesticide residue purification powder which comprises a biological activity core layer, a heavy metal chelating layer is arranged on the outer side of the biological activity core layer, an organic toxin and pesticide residue toxin decomposition layer is arranged on the outer side of the heavy metal chelating layer, a slow release layer is arranged on the outer side of the organic toxin and pesticide residue toxin decomposition layer, and the slow release layer is arranged on the outer side of the biological activity core layer. An intestinal tract adsorption layer is arranged on the outer side of the slow-release layer, a sugar-coating layer is arranged on the outer side of the intestinal tract adsorption layer, the bioactive core layer, the heavy metal chelating layer, the organic toxin and pesticide residue toxin decomposition layer, the slow-release layer, the intestinal tract adsorption layer and the sugar-coating layer form a multi-layer structure from inside to outside, and the multiple layers are matched. Microbial metabolites, heavy metals, organic toxins and pesticide residue toxins are sequentially treated from inside to outside, and mutual interference of components is avoided; the probiotics on the core layer continuously generate metabolites after colonization in intestinal tracts, so that the animals can discharge heavy metals and toxins.

This invention provides a slope protection material composed of recycled heavy metal tailings and its preparation method. The material includes: recycled heavy metal tailings treated with a heavy metal chelating agent as a heavy metal ion capture agent, the chelating agent being added at 0.05%–0.2% of the heavy metal tailings weight; recycled heavy metal tailings as aggregate, which is mixed with natural soil to form a base material at a ratio of 1:1.5–2.5; fine aggregate and fine sand, added at 5%–10% of the base material weight; and high-viscosity industrial-grade sodium alginate added as a water-retaining and reinforcing agent, added at 0.5%–2.0% of the base material weight. Additionally, 28% organic matter is added to the base material. The application of this invention effectively solves the problems of ineffective utilization of recycled heavy metal tailings and excessive use of scarce natural soil in existing technologies, and also addresses the issues of weak strength, poor effectiveness in steep slope treatment, and poor stability in existing slope protection materials.

The application provides a deep water layer sewage treatment system and method for river sewage, which comprises a pretreatment interception module, an intelligent precise dosing module, a gradient reaction module, a solid-liquid separation-recovery module and an Internet of Things monitoring and control module; the composition of the medicament used in the intelligent precise dosing module comprises, in parts by weight, 40-85 parts of a conventional flocculant, 2-6 parts of an organic coagulant aid, 12-28 parts of a graphene-chitosan grafted beta-cyclodextrin composite adsorbent, 8-22 parts of a magnetic cerium-bismuth composite nano photocatalyst, 4-12 parts of a heavy metal chelating agent, 18-45 parts of a slow-release carrier, 6-18 parts of an oxidation synergist, 3-9 parts of a pH regulator, 7-15 parts of a biological synergist and 2-6 parts of a bactericide; the modules and components of the medicament in the application synergistically act to efficiently remove suspended particles, organic pollutants, ammonia nitrogen, total phosphorus and heavy metals such as Cr 6+ , Pb 2+ , Cd 2+ , etc. in the deep water layer of river sewage, and improve the precision, automation level and resource recovery rate of sewage treatment.

The invention relates to the technical field of waste battery recycling treatment, in particular to a method for recycling a solid electrolyte by using a waste lithium iron phosphate battery and the solid electrolyte. The method comprises the following steps: carrying out acid treatment on positive plate fragments from the waste lithium iron phosphate battery in an acid solution, and then carrying out first solid-liquid separation to obtain an aluminum-containing filtrate and an iron phosphorus slag filter cake; drying the iron-phosphorus slag filter cake to obtain an iron-phosphorus slag dry basis, and carrying out extrusion granulation on the iron-phosphorus slag dry basis and sulfur to obtain a granulated material; carrying out microwave irradiation treatment on the granulation material to obtain a microwave reconstruction product material, sulfur vapor and carbon dioxide; and contacting the microwave reconstruction product material with a complexing agent solution, and then carrying out second solid-liquid separation to obtain a heavy metal chelating solution and a solid electrolyte filter cake. According to the method disclosed by the invention, the waste lithium iron phosphate battery can be efficiently converted into a high-performance solid electrolyte product at low cost.

The invention provides an iron ore tailing slag repairing method based on plant planting, and belongs to the technical field of tailing slag repairing. After the tailing slag is crushed, mixed and activated, a composite passivation layer is formed; according to the method, heavy metal chelating bacteria are concentrated in a pollution core area to efficiently passivate toxic substances, growth-promoting bacteria are focused in a nutrient absorption area to enhance the metabolic activity of plants, and mycorrhizal fungi further expand a moisture transport channel to form a remediation unit with clear spatial division of labor. The zoning cooperation mode not only avoids flora competition loss of traditional mixed inoculation, but also integrates physical barrier, chemical passivation and biological enrichment effects of heavy metals into a synergistic remediation chain through deep symbiosis of microorganisms and plants, and greatly shortens the migration and transformation period of pollutants.

The invention discloses a slope groundwater heavy metal remediation method. Comprising the following steps: adding a heavy metal chelating agent into an injection well group of a collection area; after heavy metals are captured and removed by utilizing an active material filled in the permeable reactive barrier and arranged positive and negative electrode pairs, the heavy metals flow into a phytoremediation area; after heavy metal pollutants are continuously removed by utilizing the phytoremediation area, the water flows into the water storage circulation area; the water quality monitoring system is used for monitoring the water quality in real time in the water storage circulation area; the PLC control system controls opening and closing of the circulating pump and the control valve based on the water quality monitoring result. The device integrates pollution desorption and convergence, solidification and recovery, plant absorption, cyclic repair, deep purification and online monitoring, can efficiently and durably remove heavy metals, and solves the problems of difficult heavy metal treatment and low efficiency.

The utility model discloses a kind of storage devices for heavy metal chelating agent production, including storage tank, the upper surface of storage tank is rotatably installed with cover plate, the surface of cover plate is equipped with through slot, one side of the through slot is fixedly connected with fixed block, the one side of fixed block is fixedly connected with circular bar, the outer surface of circular bar is slidably sleeved with adjusting cylinder, the inside of adjusting cylinder is combined with jacking spring, the one end of jacking spring is jackedly connected with the end of circular bar, one end of adjusting cylinder is fixedly connected with support, the inside of support is equipped with square open slot, the side of square open slot is equipped with fixed hole, the inside of square open slot is inserted with locating rod, the outside surface of locating rod is fixedly attached with cleaning brush, the cleaning brush is slidably connected with the opening position of square open slot, and when using, it can be adjusted to be inserted to internal position, it is convenient and efficient, adaptability is high, beneficial to control use.

The invention provides a deepwater layer sewage treatment system for river sewage and a sewage treatment method. The deepwater layer sewage treatment system comprises a pretreatment interception module, an intelligent precise adding module, a gradient reaction module, a solid-liquid separation-recovery module and an Internet of Things monitoring regulation and control module, the invention relates to a preparation method of an anti-aging agent. A medicament used by the intelligent precise adding module is prepared from the following raw materials: 40 to 85 parts of a conventional flocculating agent, 2 to 6 parts of an organic coagulant aid, 12 to 28 parts of a graphene-chitosan grafted beta-cyclodextrin composite adsorbent, 8 to 22 parts of a magnetic cerium-bismuth loaded composite nano photocatalyst, 4 to 12 parts of a heavy metal chelating agent, 18 to 45 parts of a slow-release carrier, 6 to 18 parts of an oxidation synergist and 3 to 9 parts of a pH regulator. 7-15 parts of a biological synergist and 2-6 parts of a bactericide. According to the sewage treatment device, all the modules and all the components of the medicament have a synergistic effect, suspended particles, organic pollutants, ammonia nitrogen, total phosphorus and heavy metals such as Cr < 6 + >, Pb < 2 + > and Cd < 2 + > in the sewage of the deepwater layer of the riverway can be efficiently removed, and the accuracy, the automation level and the resource recycling rate of sewage treatment are improved.

The technology described herein is directed to compositions and methods for treating CNS diseases or disorders associated with microbiome dysbiosis. In one aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in queuine biosynthesis. In another aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in endozepine biosynthesis. In another aspect, described herein are compositions and methods for treating CNS diseases or disorders associated with a microbiome deficient in heavy metal sequestration.

The application discloses a method for targeting heavy metal removal in a fly ash water washing process, and relates to the technical field of wastewater treatment; and specifically comprises the following process steps: fly ash samples are placed in deionized water, sodium dihydrogen phosphate is added for primary water washing treatment, and first-stage water washing fly ash and first-stage water washing filtrate are obtained through filtration; then the first-stage water washing fly ash is placed in deionized water, the first-stage water washing filtrate is added, CO2 gas is introduced for treatment, ferrous sulfate is added for stirring and reaction, a heavy metal chelating agent is added, and the pH of the system is adjusted for secondary water washing treatment; after filtration, the heavy metal chelating agent is separated from secondary fly ash residues, and the secondary water washing fly ash is obtained through drying; the secondary water washing fly ash is placed in deionized water, a heavy metal adsorbent is added for tertiary water washing treatment, the heavy metal adsorbent is separated from tertiary water washing fly ash residues through filtration, and the tertiary water washing fly ash is obtained through drying; and the final tertiary water washing fly ash achieves good purification effect in heavy metal leaching toxicity testing.

The invention discloses a method for targeted removal of heavy metals in a fly ash washing process, and relates to the technical field of wastewater treatment. The method specifically comprises the following process steps: putting a fly ash sample into deionized water, adding sodium dihydrogen phosphate for primary water washing treatment, and filtering to obtain primary water-washed fly ash and primary water-washed filtrate; placing the primary water-washed fly ash in deionized water, adding primary water-washed filtrate, introducing CO2 atmosphere for treatment, adding ferrous sulfate for stirring reaction, adding a heavy metal chelating agent, adjusting the pH value of the system for secondary water-washed treatment, filtering, separating the heavy metal chelating agent from secondary fly ash residues, and drying to obtain secondary water-washed fly ash; putting the fly ash into deionized water, adding a heavy metal adsorbent to carry out third-stage water washing treatment, filtering to separate the heavy metal adsorbent from the third-stage water washing fly ash residue, and drying to obtain third-stage water washing fly ash; and the final three-stage washing water ash has a good purification effect in a heavy metal leaching toxicity test.

This invention discloses a soil conditioner for coal mine spoil heaps utilizing coal gangue and its preparation method. The method involves first crushing the coal gangue and then calcining it at high temperature, followed by activation and modification with citric acid to obtain modified coal gangue. This modified coal gangue is then mixed with biochar, humic acid, and polyacrylamide. Next, a self-prepared aqueous solution of a bifunctional polymer for heavy metal chelation and structural stabilization is added. This polymer, obtained by grafting thiol and chloromethyl groups and cross-linking, effectively immobilizes heavy metals and enhances soil aggregate structure. Simultaneously, a self-prepared silicate slow-release and microbial synergistic modifier, composed of sodium silicate and an organic network, is added. This modifier can be premixed with phosphate-solubilizing and nitrogen-fixing bacteria to achieve synergistic promotion of nutrient slow release and microbial activity. Finally, all materials are mixed, granulated, and dried at low temperature to obtain the final product. This invention significantly improves the soil structure of spoil heaps, immobilizes heavy metals, provides long-lasting nutrients, and promotes ecological restoration.

This invention discloses a method for preparing an acrylic macroporous anion exchange resin, comprising the following steps: 1) preparation of macroporous white spheres; 2) amination reaction; 3) transformation and post-treatment. This invention utilizes a synergistic technical solution of "rosin-based monomer-reinforced framework + composite porogen to construct a hierarchical porous structure + composite amination," resulting in anion exchange resin with good anion exchange capacity and heavy metal chelating ability, excellent synergistic treatment effect on multiple pollutants in complex wastewater, good thermal stability, high mechanical strength, good pore-forming effect, and high specific surface area. Furthermore, the entire preparation method involves mild reaction conditions, is easy to scale up for production, and has significant industrial application value.

This invention discloses a heavy metal chelating flocculant possessing both dual chelating groups, its preparation method, and its application. First, a polyethylene polyamine undergoes a nucleophilic addition reaction with carbon disulfide in the presence of a base, thereby forming a -CSS... － The acetate group is introduced at the non-terminal position of the polyethylene polyamine molecule, and then, under strongly alkaline conditions, undergoes an electrophilic substitution reaction with a haloacetate to introduce acetate groups at both ends of the molecule, thus giving the molecule both -CSS and ethyl acetate groups. － and —N(CH2COO) － 2. Two strong chelating groups. The two chelating groups in the molecule complement each other, working synergistically to significantly improve the chelation and binding ability and flocculation and precipitation performance of various heavy metal ions, achieving efficient removal of multiple heavy metals in one step. This invention overcomes the shortcomings of common chelating agents, such as single functional groups, weak chelation ability for some ions, and limited applicability; the preparation process is simple, the reaction conditions are mild, the operation and control are easy, the process is environmentally friendly, and it is easy to realize industrial production.